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Merge pull request #5162 from hashicorp/f-extract-lxc 

Extract LXC from nomad
This commit is contained in:
Mahmood Ali 2019-01-09 13:07:05 -05:00 committed by GitHub
parent 90f3cea187 0dfa93a3c1
commit b08f59cdda
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
26 changed files with 6 additions and 5603 deletions
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22
GNUmakefile
View File

@ -16,14 +16,9 @@ ifeq (,$(findstring $(THIS_OS),Darwin Linux FreeBSD))
$(error Building Nomad is currently only supported on Darwin and Linux.) $(error Building Nomad is currently only supported on Darwin and Linux.)
endif endif
# On Linux we build for Linux, Windows, and potentially Linux+LXC # On Linux we build for Linux and Windows
ifeq (Linux,$(THIS_OS)) ifeq (Linux,$(THIS_OS))
# Detect if we have LXC on the path
ifeq (0,$(shell pkg-config --exists lxc; echo $$?))
HAS_LXC="true"
endif
ifeq ($(TRAVIS),true) ifeq ($(TRAVIS),true)
$(info Running in Travis, verbose mode is disabled) $(info Running in Travis, verbose mode is disabled)
else else
@ -38,9 +33,6 @@ ALL_TARGETS += linux_386 \
windows_386 \ windows_386 \
windows_amd64 windows_amd64
ifeq ("true",$(HAS_LXC))
ALL_TARGETS += linux_amd64-lxc
endif
endif endif
# On MacOS, we only build for MacOS # On MacOS, we only build for MacOS
@ -122,14 +114,6 @@ pkg/windows_amd64/nomad: $(SOURCE_FILES) ## Build Nomad for windows/amd64
-tags "$(GO_TAGS)" \ -tags "$(GO_TAGS)" \
-o "$@.exe" -o "$@.exe"
pkg/linux_amd64-lxc/nomad: $(SOURCE_FILES) ## Build Nomad+LXC for linux/amd64
@echo "==> Building $@ with tags $(GO_TAGS)..."
@CGO_ENABLED=1 GOOS=linux GOARCH=amd64 \
go build \
-ldflags $(GO_LDFLAGS) \
-tags "$(GO_TAGS) lxc" \
-o "$@"
# Define package targets for each of the build targets we actually have on this system # Define package targets for each of the build targets we actually have on this system
define makePackageTarget define makePackageTarget
@ -222,7 +206,7 @@ changelogfmt:
dev: GOOS=$(shell go env GOOS) dev: GOOS=$(shell go env GOOS)
dev: GOARCH=$(shell go env GOARCH) dev: GOARCH=$(shell go env GOARCH)
dev: GOPATH=$(shell go env GOPATH) dev: GOPATH=$(shell go env GOPATH)
dev: DEV_TARGET=pkg/$(GOOS)_$(GOARCH)$(if $(HAS_LXC),-lxc)/nomad dev: DEV_TARGET=pkg/$(GOOS)_$(GOARCH)/nomad
dev: vendorfmt changelogfmt ## Build for the current development platform dev: vendorfmt changelogfmt ## Build for the current development platform
@echo "==> Removing old development build..." @echo "==> Removing old development build..."
@rm -f $(PROJECT_ROOT)/$(DEV_TARGET) @rm -f $(PROJECT_ROOT)/$(DEV_TARGET)
@ -268,7 +252,7 @@ test-nomad: dev ## Run Nomad test suites
$(if $(ENABLE_RACE),-race) $(if $(VERBOSE),-v) \ $(if $(ENABLE_RACE),-race) $(if $(VERBOSE),-v) \
-cover \ -cover \
-timeout=15m \ -timeout=15m \
-tags="$(if $(HAS_LXC),lxc)" ./... $(if $(VERBOSE), >test.log ; echo $$? > exit-code) ./... $(if $(VERBOSE), >test.log ; echo $$? > exit-code)
@if [ $(VERBOSE) ] ; then \ @if [ $(VERBOSE) ] ; then \
bash -C "$(PROJECT_ROOT)/scripts/test_check.sh" ; \ bash -C "$(PROJECT_ROOT)/scripts/test_check.sh" ; \
fi fi

513
drivers/lxc/driver.go
View File

@ -1,513 +0,0 @@
//+build linux,lxc
package lxc
import (
"context"
"fmt"
"strconv"
"time"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/nomad/client/stats"
"github.com/hashicorp/nomad/drivers/shared/eventer"
"github.com/hashicorp/nomad/plugins/base"
"github.com/hashicorp/nomad/plugins/drivers"
"github.com/hashicorp/nomad/plugins/shared/hclspec"
"github.com/hashicorp/nomad/plugins/shared/loader"
pstructs "github.com/hashicorp/nomad/plugins/shared/structs"
"gopkg.in/lxc/go-lxc.v2"
)
const (
// pluginName is the name of the plugin
pluginName = "lxc"
// fingerprintPeriod is the interval at which the driver will send fingerprint responses
fingerprintPeriod = 30 * time.Second
)
var (
// PluginID is the rawexec plugin metadata registered in the plugin
// catalog.
PluginID = loader.PluginID{
Name: pluginName,
PluginType: base.PluginTypeDriver,
}
// PluginConfig is the rawexec factory function registered in the
// plugin catalog.
PluginConfig = &loader.InternalPluginConfig{
Config: map[string]interface{}{},
Factory: func(l hclog.Logger) interface{} { return NewLXCDriver(l) },
}
)
// PluginLoader maps pre-0.9 client driver options to post-0.9 plugin options.
func PluginLoader(opts map[string]string) (map[string]interface{}, error) {
conf := map[string]interface{}{}
if v, err := strconv.ParseBool(opts["driver.lxc.enable"]); err == nil {
conf["enabled"] = v
}
if v, err := strconv.ParseBool(opts["lxc.volumes.enabled"]); err == nil {
conf["volumes"] = v
}
if v, ok := opts["driver.lxc.path"]; ok {
conf["path"] = v
}
return conf, nil
}
var (
// pluginInfo is the response returned for the PluginInfo RPC
pluginInfo = &base.PluginInfoResponse{
Type: base.PluginTypeDriver,
PluginApiVersions: []string{drivers.ApiVersion010},
PluginVersion: "0.1.0",
Name: pluginName,
}
// configSpec is the hcl specification returned by the ConfigSchema RPC
configSpec = hclspec.NewObject(map[string]*hclspec.Spec{
"enabled": hclspec.NewDefault(
hclspec.NewAttr("enabled", "bool", false),
hclspec.NewLiteral("true"),
),
"volumes": hclspec.NewDefault(
hclspec.NewAttr("volumes", "bool", false),
hclspec.NewLiteral("true"),
),
"path": hclspec.NewDefault(
hclspec.NewAttr("path", "string", false),
hclspec.NewLiteral("\"\""),
),
})
// taskConfigSpec is the hcl specification for the driver config section of
// a task within a job. It is returned in the TaskConfigSchema RPC
taskConfigSpec = hclspec.NewObject(map[string]*hclspec.Spec{
"template": hclspec.NewAttr("template", "string", true),
"distro": hclspec.NewAttr("distro", "string", false),
"release": hclspec.NewAttr("release", "string", false),
"arch": hclspec.NewAttr("arch", "string", false),
"image_variant": hclspec.NewAttr("image_variant", "string", false),
"image_server": hclspec.NewAttr("image_server", "string", false),
"gpg_key_id": hclspec.NewAttr("gpg_key_id", "string", false),
"gpg_key_server": hclspec.NewAttr("gpg_key_server", "string", false),
"disable_gpg": hclspec.NewAttr("disable_gpg", "string", false),
"flush_cache": hclspec.NewAttr("flush_cache", "string", false),
"force_cache": hclspec.NewAttr("force_cache", "string", false),
"template_args": hclspec.NewAttr("template_args", "list(string)", false),
"log_level": hclspec.NewAttr("log_level", "string", false),
"verbosity": hclspec.NewAttr("verbosity", "string", false),
"volumes": hclspec.NewAttr("volumes", "list(string)", false),
})
// capabilities is returned by the Capabilities RPC and indicates what
// optional features this driver supports
capabilities = &drivers.Capabilities{
SendSignals: false,
Exec: false,
FSIsolation: drivers.FSIsolationImage,
}
)
// Driver is a driver for running LXC containers
type Driver struct {
// eventer is used to handle multiplexing of TaskEvents calls such that an
// event can be broadcast to all callers
eventer *eventer.Eventer
// config is the driver configuration set by the SetConfig RPC
config *Config
// nomadConfig is the client config from nomad
nomadConfig *base.ClientDriverConfig
// tasks is the in memory datastore mapping taskIDs to rawExecDriverHandles
tasks *taskStore
// ctx is the context for the driver. It is passed to other subsystems to
// coordinate shutdown
ctx context.Context
// signalShutdown is called when the driver is shutting down and cancels the
// ctx passed to any subsystems
signalShutdown context.CancelFunc
// logger will log to the Nomad agent
logger hclog.Logger
}
// Config is the driver configuration set by the SetConfig RPC call
type Config struct {
// Enabled is set to true to enable the lxc driver
Enabled bool `codec:"enabled"`
AllowVolumes bool `codec:"volumes"`
Path string `codec:"path"`
}
// TaskConfig is the driver configuration of a task within a job
type TaskConfig struct {
Template string `codec:"template"`
Distro string `codec:"distro"`
Release string `codec:"release"`
Arch string `codec:"arch"`
ImageVariant string `codec:"image_variant"`
ImageServer string `codec:"image_server"`
GPGKeyID string `codec:"gpg_key_id"`
GPGKeyServer string `codec:"gpg_key_server"`
DisableGPGValidation bool `codec:"disable_gpg"`
FlushCache bool `codec:"flush_cache"`
ForceCache bool `codec:"force_cache"`
TemplateArgs []string `codec:"template_args"`
LogLevel string `codec:"log_level"`
Verbosity string `codec:"verbosity"`
Volumes []string `codec:"volumes"`
}
// TaskState is the state which is encoded in the handle returned in
// StartTask. This information is needed to rebuild the task state and handler
// during recovery.
type TaskState struct {
TaskConfig *drivers.TaskConfig
ContainerName string
StartedAt time.Time
}
// NewLXCDriver returns a new DriverPlugin implementation
func NewLXCDriver(logger hclog.Logger) drivers.DriverPlugin {
ctx, cancel := context.WithCancel(context.Background())
logger = logger.Named(pluginName)
return &Driver{
eventer: eventer.NewEventer(ctx, logger),
config: &Config{},
tasks: newTaskStore(),
ctx: ctx,
signalShutdown: cancel,
logger: logger,
}
}
func (d *Driver) PluginInfo() (*base.PluginInfoResponse, error) {
return pluginInfo, nil
}
func (d *Driver) ConfigSchema() (*hclspec.Spec, error) {
return configSpec, nil
}
func (d *Driver) SetConfig(cfg *base.Config) error {
var config Config
if len(cfg.PluginConfig) != 0 {
if err := base.MsgPackDecode(cfg.PluginConfig, &config); err != nil {
return err
}
}
d.config = &config
if cfg.AgentConfig != nil {
d.nomadConfig = cfg.AgentConfig.Driver
}
return nil
}
func (d *Driver) Shutdown() {
d.signalShutdown()
}
func (d *Driver) TaskConfigSchema() (*hclspec.Spec, error) {
return taskConfigSpec, nil
}
func (d *Driver) Capabilities() (*drivers.Capabilities, error) {
return capabilities, nil
}
func (d *Driver) Fingerprint(ctx context.Context) (<-chan *drivers.Fingerprint, error) {
ch := make(chan *drivers.Fingerprint)
go d.handleFingerprint(ctx, ch)
return ch, nil
}
func (d *Driver) handleFingerprint(ctx context.Context, ch chan<- *drivers.Fingerprint) {
defer close(ch)
ticker := time.NewTimer(0)
for {
select {
case <-ctx.Done():
return
case <-d.ctx.Done():
return
case <-ticker.C:
ticker.Reset(fingerprintPeriod)
ch <- d.buildFingerprint()
}
}
}
func (d *Driver) buildFingerprint() *drivers.Fingerprint {
var health drivers.HealthState
var desc string
attrs := map[string]*pstructs.Attribute{}
lxcVersion := lxc.Version()
if d.config.Enabled && lxcVersion != "" {
health = drivers.HealthStateHealthy
desc = "ready"
attrs["driver.lxc"] = pstructs.NewBoolAttribute(true)
attrs["driver.lxc.version"] = pstructs.NewStringAttribute(lxcVersion)
} else {
health = drivers.HealthStateUndetected
desc = "disabled"
}
if d.config.AllowVolumes {
attrs["driver.lxc.volumes.enabled"] = pstructs.NewBoolAttribute(true)
}
return &drivers.Fingerprint{
Attributes: attrs,
Health: health,
HealthDescription: desc,
}
}
func (d *Driver) RecoverTask(handle *drivers.TaskHandle) error {
if handle == nil {
return fmt.Errorf("error: handle cannot be nil")
}
if _, ok := d.tasks.Get(handle.Config.ID); ok {
return nil
}
var taskState TaskState
if err := handle.GetDriverState(&taskState); err != nil {
return fmt.Errorf("failed to decode task state from handle: %v", err)
}
var driverConfig TaskConfig
if err := taskState.TaskConfig.DecodeDriverConfig(&driverConfig); err != nil {
return fmt.Errorf("failed to decode driver config: %v", err)
}
c, err := lxc.NewContainer(taskState.ContainerName, d.lxcPath())
if err != nil {
return fmt.Errorf("failed to create container ref: %v", err)
}
initPid := c.InitPid()
h := &taskHandle{
container: c,
initPid: initPid,
taskConfig: taskState.TaskConfig,
procState: drivers.TaskStateRunning,
startedAt: taskState.StartedAt,
exitResult: &drivers.ExitResult{},
totalCpuStats: stats.NewCpuStats(),
userCpuStats: stats.NewCpuStats(),
systemCpuStats: stats.NewCpuStats(),
}
d.tasks.Set(taskState.TaskConfig.ID, h)
go h.run()
return nil
}
func (d *Driver) StartTask(cfg *drivers.TaskConfig) (*drivers.TaskHandle, *drivers.DriverNetwork, error) {
if _, ok := d.tasks.Get(cfg.ID); ok {
return nil, nil, fmt.Errorf("task with ID %q already started", cfg.ID)
}
var driverConfig TaskConfig
if err := cfg.DecodeDriverConfig(&driverConfig); err != nil {
return nil, nil, fmt.Errorf("failed to decode driver config: %v", err)
}
d.logger.Info("starting lxc task", "driver_cfg", hclog.Fmt("%+v", driverConfig))
handle := drivers.NewTaskHandle(pluginName)
handle.Config = cfg
c, err := d.initializeContainer(cfg, driverConfig)
if err != nil {
return nil, nil, err
}
opt := toLXCCreateOptions(driverConfig)
if err := c.Create(opt); err != nil {
return nil, nil, fmt.Errorf("unable to create container: %v", err)
}
cleanup := func() {
if err := c.Destroy(); err != nil {
d.logger.Error("failed to clean up from an error in Start", "error", err)
}
}
if err := d.configureContainerNetwork(c); err != nil {
cleanup()
return nil, nil, err
}
if err := d.mountVolumes(c, cfg, driverConfig); err != nil {
cleanup()
return nil, nil, err
}
if err := c.Start(); err != nil {
cleanup()
return nil, nil, fmt.Errorf("unable to start container: %v", err)
}
if err := d.setResourceLimits(c, cfg); err != nil {
cleanup()
return nil, nil, err
}
pid := c.InitPid()
h := &taskHandle{
container: c,
initPid: pid,
taskConfig: cfg,
procState: drivers.TaskStateRunning,
startedAt: time.Now().Round(time.Millisecond),
logger: d.logger,
totalCpuStats: stats.NewCpuStats(),
userCpuStats: stats.NewCpuStats(),
systemCpuStats: stats.NewCpuStats(),
}
driverState := TaskState{
ContainerName: c.Name(),
TaskConfig: cfg,
StartedAt: h.startedAt,
}
if err := handle.SetDriverState(&driverState); err != nil {
d.logger.Error("failed to start task, error setting driver state", "error", err)
cleanup()
return nil, nil, fmt.Errorf("failed to set driver state: %v", err)
}
d.tasks.Set(cfg.ID, h)
go h.run()
return handle, nil, nil
}
func (d *Driver) WaitTask(ctx context.Context, taskID string) (<-chan *drivers.ExitResult, error) {
handle, ok := d.tasks.Get(taskID)
if !ok {
return nil, drivers.ErrTaskNotFound
}
ch := make(chan *drivers.ExitResult)
go d.handleWait(ctx, handle, ch)
return ch, nil
}
func (d *Driver) handleWait(ctx context.Context, handle *taskHandle, ch chan *drivers.ExitResult) {
defer close(ch)
//
// Wait for process completion by polling status from handler.
// We cannot use the following alternatives:
// * Process.Wait() requires LXC container processes to be children
// of self process; but LXC runs container in separate PID hierarchy
// owned by PID 1.
// * lxc.Container.Wait() holds a write lock on container and prevents
// any other calls, including stats.
//
// Going with simplest approach of polling for handler to mark exit.
ticker := time.NewTicker(2 * time.Second)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-d.ctx.Done():
return
case <-ticker.C:
s := handle.TaskStatus()
if s.State == drivers.TaskStateExited {
ch <- handle.exitResult
}
}
}
}
func (d *Driver) StopTask(taskID string, timeout time.Duration, signal string) error {
handle, ok := d.tasks.Get(taskID)
if !ok {
return drivers.ErrTaskNotFound
}
if err := handle.shutdown(timeout); err != nil {
return fmt.Errorf("executor Shutdown failed: %v", err)
}
return nil
}
func (d *Driver) DestroyTask(taskID string, force bool) error {
handle, ok := d.tasks.Get(taskID)
if !ok {
return drivers.ErrTaskNotFound
}
if handle.IsRunning() && !force {
return fmt.Errorf("cannot destroy running task")
}
if handle.IsRunning() {
// grace period is chosen arbitrary here
if err := handle.shutdown(1 * time.Minute); err != nil {
handle.logger.Error("failed to destroy executor", "err", err)
}
}
d.tasks.Delete(taskID)
return nil
}
func (d *Driver) InspectTask(taskID string) (*drivers.TaskStatus, error) {
handle, ok := d.tasks.Get(taskID)
if !ok {
return nil, drivers.ErrTaskNotFound
}
return handle.TaskStatus(), nil
}
func (d *Driver) TaskStats(taskID string) (*drivers.TaskResourceUsage, error) {
handle, ok := d.tasks.Get(taskID)
if !ok {
return nil, drivers.ErrTaskNotFound
}
return handle.stats()
}
func (d *Driver) TaskEvents(ctx context.Context) (<-chan *drivers.TaskEvent, error) {
return d.eventer.TaskEvents(ctx)
}
func (d *Driver) SignalTask(taskID string, signal string) error {
return fmt.Errorf("LXC driver does not support signals")
}
func (d *Driver) ExecTask(taskID string, cmd []string, timeout time.Duration) (*drivers.ExecTaskResult, error) {
return nil, fmt.Errorf("LXC driver does not support exec")
}

280
drivers/lxc/driver_test.go
View File

@ -1,280 +0,0 @@
// +build linux,lxc
package lxc
import (
"context"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"testing"
"time"
"github.com/hashicorp/hcl2/hcl"
ctestutil "github.com/hashicorp/nomad/client/testutil"
"github.com/hashicorp/nomad/helper/testlog"
"github.com/hashicorp/nomad/helper/uuid"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/hashicorp/nomad/plugins/drivers"
dtestutil "github.com/hashicorp/nomad/plugins/drivers/testutils"
"github.com/hashicorp/nomad/plugins/shared/hclspec"
"github.com/hashicorp/nomad/plugins/shared/hclutils"
"github.com/hashicorp/nomad/testutil"
"github.com/stretchr/testify/require"
lxc "gopkg.in/lxc/go-lxc.v2"
)
func TestLXCDriver_Fingerprint(t *testing.T) {
t.Parallel()
requireLXC(t)
require := require.New(t)
d := NewLXCDriver(testlog.HCLogger(t)).(*Driver)
d.config.Enabled = true
harness := dtestutil.NewDriverHarness(t, d)
fingerCh, err := harness.Fingerprint(context.Background())
require.NoError(err)
select {
case finger := <-fingerCh:
require.Equal(drivers.HealthStateHealthy, finger.Health)
require.True(finger.Attributes["driver.lxc"].GetBool())
require.NotEmpty(finger.Attributes["driver.lxc.version"].GetString())
case <-time.After(time.Duration(testutil.TestMultiplier()*5) * time.Second):
require.Fail("timeout receiving fingerprint")
}
}
func TestLXCDriver_FingerprintNotEnabled(t *testing.T) {
t.Parallel()
requireLXC(t)
require := require.New(t)
d := NewLXCDriver(testlog.HCLogger(t)).(*Driver)
d.config.Enabled = false
harness := dtestutil.NewDriverHarness(t, d)
fingerCh, err := harness.Fingerprint(context.Background())
require.NoError(err)
select {
case finger := <-fingerCh:
require.Equal(drivers.HealthStateUndetected, finger.Health)
require.Empty(finger.Attributes["driver.lxc"])
require.Empty(finger.Attributes["driver.lxc.version"])
case <-time.After(time.Duration(testutil.TestMultiplier()*5) * time.Second):
require.Fail("timeout receiving fingerprint")
}
}
func TestLXCDriver_Start_Wait(t *testing.T) {
if !testutil.IsTravis() {
t.Parallel()
}
requireLXC(t)
ctestutil.RequireRoot(t)
require := require.New(t)
// prepare test file
testFileContents := []byte("this should be visible under /mnt/tmp")
tmpFile, err := ioutil.TempFile("/tmp", "testlxcdriver_start_wait")
if err != nil {
t.Fatalf("error writing temp file: %v", err)
}
defer os.Remove(tmpFile.Name())
if _, err := tmpFile.Write(testFileContents); err != nil {
t.Fatalf("error writing temp file: %v", err)
}
if err := tmpFile.Close(); err != nil {
t.Fatalf("error closing temp file: %v", err)
}
d := NewLXCDriver(testlog.HCLogger(t)).(*Driver)
d.config.Enabled = true
d.config.AllowVolumes = true
harness := dtestutil.NewDriverHarness(t, d)
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "test",
Resources: &drivers.Resources{
NomadResources: &structs.AllocatedTaskResources{
Memory: structs.AllocatedMemoryResources{
MemoryMB: 2,
},
Cpu: structs.AllocatedCpuResources{
CpuShares: 1024,
},
},
LinuxResources: &drivers.LinuxResources{
CPUShares: 1024,
MemoryLimitBytes: 2 * 1024,
},
},
}
taskConfig := map[string]interface{}{
"template": "/usr/share/lxc/templates/lxc-busybox",
"volumes": []string{"/tmp/:mnt/tmp"},
}
encodeDriverHelper(require, task, taskConfig)
cleanup := harness.MkAllocDir(task, false)
defer cleanup()
handle, _, err := harness.StartTask(task)
require.NoError(err)
require.NotNil(handle)
lxcHandle, ok := d.tasks.Get(task.ID)
require.True(ok)
container := lxcHandle.container
// Destroy container after test
defer func() {
container.Stop()
container.Destroy()
}()
// Test that container is running
testutil.WaitForResult(func() (bool, error) {
state := container.State()
if state == lxc.RUNNING {
return true, nil
}
return false, fmt.Errorf("container in state: %v", state)
}, func(err error) {
t.Fatalf("container failed to start: %v", err)
})
// Test that directories are mounted in their proper location
containerName := container.Name()
for _, mnt := range []string{"alloc", "local", "secrets", "mnt/tmp"} {
fullpath := filepath.Join(d.lxcPath(), containerName, "rootfs", mnt)
stat, err := os.Stat(fullpath)
require.NoError(err)
require.True(stat.IsDir())
}
// Test bind mount volumes exist in container:
mountedContents, err := exec.Command("lxc-attach",
"-n", containerName, "--",
"cat", filepath.Join("/mnt/", tmpFile.Name()),
).Output()
require.NoError(err)
require.Equal(string(testFileContents), string(mountedContents))
// Test that killing container marks container as stopped
require.NoError(container.Stop())
testutil.WaitForResult(func() (bool, error) {
status, err := d.InspectTask(task.ID)
if err == nil && status.State == drivers.TaskStateExited {
return true, nil
}
return false, fmt.Errorf("task in state: %v", status.State)
}, func(err error) {
t.Fatalf("task was not marked as stopped: %v", err)
})
}
func TestLXCDriver_Start_Stop(t *testing.T) {
if !testutil.IsTravis() {
t.Parallel()
}
requireLXC(t)
ctestutil.RequireRoot(t)
require := require.New(t)
d := NewLXCDriver(testlog.HCLogger(t)).(*Driver)
d.config.Enabled = true
d.config.AllowVolumes = true
harness := dtestutil.NewDriverHarness(t, d)
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "test",
Resources: &drivers.Resources{
NomadResources: &structs.AllocatedTaskResources{
Memory: structs.AllocatedMemoryResources{
MemoryMB: 2,
},
Cpu: structs.AllocatedCpuResources{
CpuShares: 1024,
},
},
LinuxResources: &drivers.LinuxResources{
CPUShares: 1024,
MemoryLimitBytes: 2 * 1024,
},
},
}
taskConfig := map[string]interface{}{
"template": "/usr/share/lxc/templates/lxc-busybox",
}
encodeDriverHelper(require, task, taskConfig)
cleanup := harness.MkAllocDir(task, false)
defer cleanup()
handle, _, err := harness.StartTask(task)
require.NoError(err)
require.NotNil(handle)
lxcHandle, ok := d.tasks.Get(task.ID)
require.True(ok)
container := lxcHandle.container
// Destroy container after test
defer func() {
container.Stop()
container.Destroy()
}()
// Test that container is running
testutil.WaitForResult(func() (bool, error) {
state := container.State()
if state == lxc.RUNNING {
return true, nil
}
return false, fmt.Errorf("container in state: %v", state)
}, func(err error) {
t.Fatalf("container failed to start: %v", err)
})
require.NoError(d.StopTask(task.ID, 5*time.Second, "kill"))
testutil.WaitForResult(func() (bool, error) {
status, err := d.InspectTask(task.ID)
if err == nil && status.State == drivers.TaskStateExited {
return true, nil
}
return false, fmt.Errorf("task in state: %v", status.State)
}, func(err error) {
t.Fatalf("task was not marked as stopped: %v", err)
})
}
func requireLXC(t *testing.T) {
if lxc.Version() == "" {
t.Skip("skipping, lxc not present")
}
}
func encodeDriverHelper(require *require.Assertions, task *drivers.TaskConfig, taskConfig map[string]interface{}) {
evalCtx := &hcl.EvalContext{
Functions: hclutils.GetStdlibFuncs(),
}
spec, diag := hclspec.Convert(taskConfigSpec)
require.False(diag.HasErrors())
taskConfigCtyVal, diag := hclutils.ParseHclInterface(taskConfig, spec, evalCtx)
require.False(diag.HasErrors())
err := task.EncodeDriverConfig(taskConfigCtyVal)
require.Nil(err)
}

199
drivers/lxc/handle.go
View File

@ -1,199 +0,0 @@
//+build linux,lxc
package lxc
import (
"fmt"
"strconv"
"strings"
"sync"
"time"
hclog "github.com/hashicorp/go-hclog"
"github.com/hashicorp/nomad/client/stats"
"github.com/hashicorp/nomad/plugins/drivers"
lxc "gopkg.in/lxc/go-lxc.v2"
)
type taskHandle struct {
container *lxc.Container
initPid int
logger hclog.Logger
totalCpuStats *stats.CpuStats
userCpuStats *stats.CpuStats
systemCpuStats *stats.CpuStats
// stateLock syncs access to all fields below
stateLock sync.RWMutex
taskConfig *drivers.TaskConfig
procState drivers.TaskState
startedAt time.Time
completedAt time.Time
exitResult *drivers.ExitResult
}
var (
LXCMeasuredCpuStats = []string{"System Mode", "User Mode", "Percent"}
LXCMeasuredMemStats = []string{"RSS", "Cache", "Swap", "Max Usage", "Kernel Usage", "Kernel Max Usage"}
)
func (h *taskHandle) TaskStatus() *drivers.TaskStatus {
h.stateLock.RLock()
defer h.stateLock.RUnlock()
return &drivers.TaskStatus{
ID: h.taskConfig.ID,
Name: h.taskConfig.Name,
State: h.procState,
StartedAt: h.startedAt,
CompletedAt: h.completedAt,
ExitResult: h.exitResult,
DriverAttributes: map[string]string{
"pid": strconv.Itoa(h.initPid),
},
}
}
func (h *taskHandle) IsRunning() bool {
h.stateLock.RLock()
defer h.stateLock.RUnlock()
return h.procState == drivers.TaskStateRunning
}
func (h *taskHandle) run() {
h.stateLock.Lock()
if h.exitResult == nil {
h.exitResult = &drivers.ExitResult{}
}
h.stateLock.Unlock()
if ok, err := waitTillStopped(h.container); !ok {
h.logger.Error("failed to find container process", "error", err)
return
}
h.stateLock.Lock()
defer h.stateLock.Unlock()
h.procState = drivers.TaskStateExited
h.exitResult.ExitCode = 0
h.exitResult.Signal = 0
h.completedAt = time.Now()
// TODO: detect if the task OOMed
}
func (h *taskHandle) stats() (*drivers.TaskResourceUsage, error) {
cpuStats, err := h.container.CPUStats()
if err != nil {
h.logger.Error("failed to get container cpu stats", "error", err)
return nil, nil
}
total, err := h.container.CPUTime()
if err != nil {
h.logger.Error("failed to get container cpu time", "error", err)
return nil, nil
}
t := time.Now()
// Get the cpu stats
system := cpuStats["system"]
user := cpuStats["user"]
cs := &drivers.CpuStats{
SystemMode: h.systemCpuStats.Percent(float64(system)),
UserMode: h.systemCpuStats.Percent(float64(user)),
Percent: h.totalCpuStats.Percent(float64(total)),
TotalTicks: float64(user + system),
Measured: LXCMeasuredCpuStats,
}
// Get the Memory Stats
memData := map[string]uint64{
"rss": 0,
"cache": 0,
"swap": 0,
}
rawMemStats := h.container.CgroupItem("memory.stat")
for _, rawMemStat := range rawMemStats {
key, val, err := keysToVal(rawMemStat)
if err != nil {
h.logger.Error("failed to get stat", "line", rawMemStat, "error", err)
continue
}
if _, ok := memData[key]; ok {
memData[key] = val
}
}
ms := &drivers.MemoryStats{
RSS: memData["rss"],
Cache: memData["cache"],
Swap: memData["swap"],
Measured: LXCMeasuredMemStats,
}
mu := h.container.CgroupItem("memory.max_usage_in_bytes")
for _, rawMemMaxUsage := range mu {
val, err := strconv.ParseUint(rawMemMaxUsage, 10, 64)
if err != nil {
h.logger.Error("failed to get max memory usage", "error", err)
continue
}
ms.MaxUsage = val
}
ku := h.container.CgroupItem("memory.kmem.usage_in_bytes")
for _, rawKernelUsage := range ku {
val, err := strconv.ParseUint(rawKernelUsage, 10, 64)
if err != nil {
h.logger.Error("failed to get kernel memory usage", "error", err)
continue
}
ms.KernelUsage = val
}
mku := h.container.CgroupItem("memory.kmem.max_usage_in_bytes")
for _, rawMaxKernelUsage := range mku {
val, err := strconv.ParseUint(rawMaxKernelUsage, 10, 64)
if err != nil {
h.logger.Error("failed tog get max kernel memory usage", "error", err)
continue
}
ms.KernelMaxUsage = val
}
taskResUsage := drivers.TaskResourceUsage{
ResourceUsage: &drivers.ResourceUsage{
CpuStats: cs,
MemoryStats: ms,
},
Timestamp: t.UTC().UnixNano(),
}
return &taskResUsage, nil
}
func keysToVal(line string) (string, uint64, error) {
tokens := strings.Split(line, " ")
if len(tokens) != 2 {
return "", 0, fmt.Errorf("line isn't a k/v pair")
}
key := tokens[0]
val, err := strconv.ParseUint(tokens[1], 10, 64)
return key, val, err
}
// shutdown shuts down the container, with `timeout` grace period
// before killing the container with SIGKILL.
func (h *taskHandle) shutdown(timeout time.Duration) error {
err := h.container.Shutdown(timeout)
if err == nil {
return nil
}
return h.container.Stop()
}

253
drivers/lxc/lxc.go
View File

@ -1,253 +0,0 @@
//+build linux,lxc
package lxc
import (
"fmt"
"os"
"path/filepath"
"strconv"
"strings"
"syscall"
"time"
"github.com/hashicorp/nomad/plugins/drivers"
ldevices "github.com/opencontainers/runc/libcontainer/devices"
"gopkg.in/lxc/go-lxc.v2"
)
var (
verbosityLevels = map[string]lxc.Verbosity{
"": lxc.Quiet,
"verbose": lxc.Verbose,
"quiet": lxc.Quiet,
}
logLevels = map[string]lxc.LogLevel{
"": lxc.ERROR,
"debug": lxc.DEBUG,
"error": lxc.ERROR,
"info": lxc.INFO,
"trace": lxc.TRACE,
"warn": lxc.WARN,
}
)
const (
// containerMonitorIntv is the interval at which the driver checks if the
// container is still alive
containerMonitorIntv = 2 * time.Second
)
func (d *Driver) lxcPath() string {
lxcPath := d.config.Path
if lxcPath == "" {
lxcPath = lxc.DefaultConfigPath()
}
return lxcPath
}
func (d *Driver) initializeContainer(cfg *drivers.TaskConfig, taskConfig TaskConfig) (*lxc.Container, error) {
lxcPath := d.lxcPath()
containerName := fmt.Sprintf("%s-%s", cfg.Name, cfg.AllocID)
c, err := lxc.NewContainer(containerName, lxcPath)
if err != nil {
return nil, fmt.Errorf("failed to initialize container: %v", err)
}
if v, ok := verbosityLevels[taskConfig.Verbosity]; ok {
c.SetVerbosity(v)
} else {
return nil, fmt.Errorf("lxc driver config 'verbosity' can only be either quiet or verbose")
}
if v, ok := logLevels[taskConfig.LogLevel]; ok {
c.SetLogLevel(v)
} else {
return nil, fmt.Errorf("lxc driver config 'log_level' can only be trace, debug, info, warn or error")
}
logFile := filepath.Join(cfg.TaskDir().Dir, fmt.Sprintf("%v-lxc.log", cfg.Name))
c.SetLogFile(logFile)
return c, nil
}
func (d *Driver) configureContainerNetwork(c *lxc.Container) error {
// Set the network type to none
if err := c.SetConfigItem(networkTypeConfigKey(), "none"); err != nil {
return fmt.Errorf("error setting network type configuration: %v", err)
}
return nil
}
func networkTypeConfigKey() string {
if lxc.VersionAtLeast(2, 1, 0) {
return "lxc.net.0.type"
}
// prior to 2.1, network used
return "lxc.network.type"
}
func (d *Driver) mountVolumes(c *lxc.Container, cfg *drivers.TaskConfig, taskConfig TaskConfig) error {
mounts, err := d.mountEntries(cfg, taskConfig)
if err != nil {
return err
}
devCgroupAllows, err := d.devicesCgroupEntries(cfg)
if err != nil {
return err
}
for _, mnt := range mounts {
if err := c.SetConfigItem("lxc.mount.entry", mnt); err != nil {
return fmt.Errorf("error setting bind mount %q error: %v", mnt, err)
}
}
for _, cgroupDev := range devCgroupAllows {
if err := c.SetConfigItem("lxc.cgroup.devices.allow", cgroupDev); err != nil {
return fmt.Errorf("error setting cgroup permission %q error: %v", cgroupDev, err)
}
}
return nil
}
// mountEntries compute the mount entries to be set on the container
func (d *Driver) mountEntries(cfg *drivers.TaskConfig, taskConfig TaskConfig) ([]string, error) {
// Bind mount the shared alloc dir and task local dir in the container
mounts := []string{
fmt.Sprintf("%s local none rw,bind,create=dir", cfg.TaskDir().LocalDir),
fmt.Sprintf("%s alloc none rw,bind,create=dir", cfg.TaskDir().SharedAllocDir),
fmt.Sprintf("%s secrets none rw,bind,create=dir", cfg.TaskDir().SecretsDir),
}
mounts = append(mounts, d.formatTaskMounts(cfg.Mounts)...)
mounts = append(mounts, d.formatTaskDevices(cfg.Devices)...)
volumesEnabled := d.config.AllowVolumes
for _, volDesc := range taskConfig.Volumes {
// the format was checked in Validate()
paths := strings.Split(volDesc, ":")
if filepath.IsAbs(paths[0]) {
if !volumesEnabled {
return nil, fmt.Errorf("absolute bind-mount volume in config but volumes are disabled")
}
} else {
// Relative source paths are treated as relative to alloc dir
paths[0] = filepath.Join(cfg.TaskDir().Dir, paths[0])
}
// LXC assumes paths are relative with respect to rootfs
target := strings.TrimLeft(paths[1], "/")
mounts = append(mounts, fmt.Sprintf("%s %s none rw,bind,create=dir", paths[0], target))
}
return mounts, nil
}
func (d *Driver) devicesCgroupEntries(cfg *drivers.TaskConfig) ([]string, error) {
entries := make([]string, len(cfg.Devices))
for i, d := range cfg.Devices {
hd, err := ldevices.DeviceFromPath(d.HostPath, d.Permissions)
if err != nil {
return nil, err
}
entries[i] = hd.CgroupString()
}
return entries, nil
}
func (d *Driver) formatTaskMounts(mounts []*drivers.MountConfig) []string {
result := make([]string, len(mounts))
for i, m := range mounts {
result[i] = d.formatMount(m.HostPath, m.TaskPath, m.Readonly)
}
return result
}
func (d *Driver) formatTaskDevices(devices []*drivers.DeviceConfig) []string {
result := make([]string, len(devices))
for i, m := range devices {
result[i] = d.formatMount(m.HostPath, m.TaskPath,
!strings.Contains(m.Permissions, "w"))
}
return result
}
func (d *Driver) formatMount(hostPath, taskPath string, readOnly bool) string {
typ := "dir"
s, err := os.Stat(hostPath)
if err != nil {
d.logger.Warn("failed to find mount host path type, defaulting to dir type", "path", hostPath, "error", err)
} else if !s.IsDir() {
typ = "file"
}
perm := "rw"
if readOnly {
perm = "ro"
}
// LXC assumes paths are relative with respect to rootfs
target := strings.TrimLeft(taskPath, "/")
return fmt.Sprintf("%s %s none %s,bind,create=%s", hostPath, target, perm, typ)
}
func (d *Driver) setResourceLimits(c *lxc.Container, cfg *drivers.TaskConfig) error {
if err := c.SetMemoryLimit(lxc.ByteSize(cfg.Resources.NomadResources.Memory.MemoryMB) * lxc.MB); err != nil {
return fmt.Errorf("unable to set memory limits: %v", err)
}
if err := c.SetCgroupItem("cpu.shares", strconv.FormatInt(cfg.Resources.LinuxResources.CPUShares, 10)); err != nil {
return fmt.Errorf("unable to set cpu shares: %v", err)
}
return nil
}
func toLXCCreateOptions(taskConfig TaskConfig) lxc.TemplateOptions {
return lxc.TemplateOptions{
Template: taskConfig.Template,
Distro: taskConfig.Distro,
Release: taskConfig.Release,
Arch: taskConfig.Arch,
FlushCache: taskConfig.FlushCache,
DisableGPGValidation: taskConfig.DisableGPGValidation,
ExtraArgs: taskConfig.TemplateArgs,
}
}
// waitTillStopped blocks and returns true when container stops;
// returns false with an error message if the container processes cannot be identified.
//
// Use this in preference to c.Wait() - lxc Wait() function holds a write lock on the container
// blocking any other operation on container, including looking up container stats
func waitTillStopped(c *lxc.Container) (bool, error) {
ps, err := os.FindProcess(c.InitPid())
if err != nil {
return false, err
}
for {
if err := ps.Signal(syscall.Signal(0)); err != nil {
return true, nil
}
time.Sleep(containerMonitorIntv)
}
}

95
drivers/lxc/lxc_test.go
View File

@ -1,95 +0,0 @@
//+build linux,lxc
package lxc
import (
"testing"
"github.com/hashicorp/nomad/helper/testlog"
"github.com/hashicorp/nomad/helper/uuid"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/hashicorp/nomad/plugins/drivers"
"github.com/stretchr/testify/require"
)
func TestLXCDriver_Mounts(t *testing.T) {
t.Parallel()
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "test",
Resources: &drivers.Resources{
NomadResources: &structs.AllocatedTaskResources{
Memory: structs.AllocatedMemoryResources{
MemoryMB: 2,
},
Cpu: structs.AllocatedCpuResources{
CpuShares: 1024,
},
},
LinuxResources: &drivers.LinuxResources{
CPUShares: 1024,
MemoryLimitBytes: 2 * 1024,
},
},
Mounts: []*drivers.MountConfig{
{HostPath: "/dev", TaskPath: "/task-mounts/dev-path"},
{HostPath: "/bin/sh", TaskPath: "/task-mounts/task-path-ro", Readonly: true},
},
Devices: []*drivers.DeviceConfig{
{HostPath: "/dev", TaskPath: "/task-devices/dev-path", Permissions: "rw"},
{HostPath: "/bin/sh", TaskPath: "/task-devices/task-path-ro", Permissions: "ro"},
},
}
taskConfig := TaskConfig{
Template: "busybox",
Volumes: []string{
"relative/path:/usr-config/container/path",
"relative/path2:usr-config/container/relative",
},
}
d := NewLXCDriver(testlog.HCLogger(t)).(*Driver)
d.config.Enabled = true
entries, err := d.mountEntries(task, taskConfig)
require.NoError(t, err)
expectedEntries := []string{
"test/relative/path usr-config/container/path none rw,bind,create=dir",
"test/relative/path2 usr-config/container/relative none rw,bind,create=dir",
"/dev task-mounts/dev-path none rw,bind,create=dir",
"/bin/sh task-mounts/task-path-ro none ro,bind,create=file",
"/dev task-devices/dev-path none rw,bind,create=dir",
"/bin/sh task-devices/task-path-ro none ro,bind,create=file",
}
for _, e := range expectedEntries {
require.Contains(t, entries, e)
}
}
func TestLXCDriver_DevicesCgroup(t *testing.T) {
t.Parallel()
task := &drivers.TaskConfig{
ID: uuid.Generate(),
Name: "test",
Devices: []*drivers.DeviceConfig{
{HostPath: "/dev/random", TaskPath: "/task-devices/devrandom", Permissions: "rw"},
{HostPath: "/dev/null", TaskPath: "/task-devices/devnull", Permissions: "rwm"},
},
}
d := NewLXCDriver(testlog.HCLogger(t)).(*Driver)
d.config.Enabled = true
cgroupEntries, err := d.devicesCgroupEntries(task)
require.NoError(t, err)
expected := []string{
"c 1:8 rw",
"c 1:3 rwm",
}
require.EqualValues(t, expected, cgroupEntries)
}

35
drivers/lxc/state.go
View File

@ -1,35 +0,0 @@
//+build linux,lxc
package lxc
import (
"sync"
)
type taskStore struct {
store map[string]*taskHandle
lock sync.RWMutex
}
func newTaskStore() *taskStore {
return &taskStore{store: map[string]*taskHandle{}}
}
func (ts *taskStore) Set(id string, handle *taskHandle) {
ts.lock.Lock()
defer ts.lock.Unlock()
ts.store[id] = handle
}
func (ts *taskStore) Get(id string) (*taskHandle, bool) {
ts.lock.RLock()
defer ts.lock.RUnlock()
t, ok := ts.store[id]
return t, ok
}
func (ts *taskStore) Delete(id string) {
ts.lock.Lock()
defer ts.lock.Unlock()
delete(ts.store, id)
}

2
helper/funcs.go
View File

@ -366,6 +366,4 @@ func FormatFloat(f float64, maxPrec int) string {
} }
return v[:sublen] return v[:sublen]
return v
} }

14
plugins/shared/catalog/register_lxc.go
View File

@ -1,14 +0,0 @@
//+build linux,lxc
package catalog
import (
"github.com/hashicorp/nomad/drivers/lxc"
)
// This file is where all builtin plugins should be registered in the catalog.
// Plugins with build restrictions should be placed in the appropriate
// register_XXX.go file.
func init() {
RegisterDeferredConfig(lxc.PluginID, lxc.PluginConfig, lxc.PluginLoader)
}

4
scheduler/preemption.go
View File

@ -160,7 +160,7 @@ func (p *Preemptor) SetPreemptions(allocs []*structs.Allocation) {
// Initialize counts // Initialize counts
for _, alloc := range allocs { for _, alloc := range allocs {
id := structs.NamespacedID{alloc.JobID, alloc.Namespace} id := structs.NewNamespacedID(alloc.JobID, alloc.Namespace)
countMap, ok := p.currentPreemptions[id] countMap, ok := p.currentPreemptions[id]
if !ok { if !ok {
countMap = make(map[string]int) countMap = make(map[string]int)
@ -173,7 +173,7 @@ func (p *Preemptor) SetPreemptions(allocs []*structs.Allocation) {
// getNumPreemptions counts the number of other allocations being preempted that match the job and task group of // getNumPreemptions counts the number of other allocations being preempted that match the job and task group of
// the alloc under consideration. This is used as a scoring factor to minimize too many allocs of the same job being preempted at once // the alloc under consideration. This is used as a scoring factor to minimize too many allocs of the same job being preempted at once
func (p *Preemptor) getNumPreemptions(alloc *structs.Allocation) int { func (p *Preemptor) getNumPreemptions(alloc *structs.Allocation) int {
c, ok := p.currentPreemptions[structs.NamespacedID{alloc.JobID, alloc.Namespace}][alloc.TaskGroup] c, ok := p.currentPreemptions[structs.NewNamespacedID(alloc.JobID, alloc.Namespace)][alloc.TaskGroup]
if !ok { if !ok {
return 0 return 0
} }

3
scripts/travis-linux.sh
View File

@ -10,8 +10,7 @@ sudo service docker restart
# true errors would fail in the apt-get install phase # true errors would fail in the apt-get install phase
apt-get update || true apt-get update || true
apt-get install -y liblxc1 lxc-dev lxc lxc-templates shellcheck apt-get install -y qemu shellcheck
apt-get install -y qemu
bash ./scripts/travis-rkt.sh bash ./scripts/travis-rkt.sh
bash ./scripts/travis-consul.sh bash ./scripts/travis-consul.sh
bash ./scripts/travis-vault.sh bash ./scripts/travis-vault.sh

3
scripts/vagrant-linux-priv-config.sh
View File

@ -26,11 +26,8 @@ apt-get install -y \
build-essential \ build-essential \
git \ git \
libc6-dev-i386 \ libc6-dev-i386 \
liblxc1 \
libpcre3-dev \ libpcre3-dev \
linux-libc-dev:i386 \ linux-libc-dev:i386 \
lxc-dev \
lxc-templates \
pkg-config \ pkg-config \
zip zip

16
vendor/gopkg.in/lxc/go-lxc.v2/AUTHORS generated vendored
View File

@ -1,16 +0,0 @@
# This is the official list of Go-LXC authors for copyright purposes.
# Names should be added to this file as
#Name or Organization <email address>
# The email address is not required for organizations.
# Please keep the list sorted.
David Cramer <cramer@dropbox.com>
Fatih Arslan <fatih@koding.com>
Kelsey Hightower <kelsey.hightower@gmail.com>
S.Çağlar Onur <caglar@10ur.org>
Serge Hallyn <serge.hallyn@ubuntu.com>
Stéphane Graber <stgraber@ubuntu.com>
Syed <syed1.mushtaq@gmail.com>
Tycho Andersen <tycho.andersen@canonical.com>

522
vendor/gopkg.in/lxc/go-lxc.v2/LICENSE generated vendored
View File

@ -1,522 +0,0 @@
This software is licensed under the LGPLv2.1, included below.
As a special exception to the GNU Lesser General Public License version 2.1
("LGPL2.1"), the copyright holders of this Library give you permission to
convey to a third party a Combined Work that links statically or dynamically
to this Library without providing any Minimal Corresponding Source or
Minimal Application Code or providing the installation information,
provided that you comply with the other provisions of LGPL2.1
and provided that you meet, for the Application the terms and conditions
of the license(s) which apply to the Application.
Except as stated in this special exception, the provisions of LGPL2.1 will
continue to comply in full to this Library. If you modify this Library, you
may apply this exception to your version of this Library, but you are not
obliged to do so. If you do not wish to do so, delete this exception
statement from your version. This exception does not (and cannot) modify any
license terms which apply to the Application, with which you must still
comply.
GNU LESSER GENERAL PUBLIC LICENSE
Version 2.1, February 1999
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
[This is the first released version of the Lesser GPL. It also counts
as the successor of the GNU Library Public License, version 2, hence
the version number 2.1.]
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
Licenses are intended to guarantee your freedom to share and change
free software--to make sure the software is free for all its users.
This license, the Lesser General Public License, applies to some
specially designated software packages--typically libraries--of the
Free Software Foundation and other authors who decide to use it. You
can use it too, but we suggest you first think carefully about whether
this license or the ordinary General Public License is the better
strategy to use in any particular case, based on the explanations below.
When we speak of free software, we are referring to freedom of use,
not price. Our General Public Licenses are designed to make sure that
you have the freedom to distribute copies of free software (and charge
for this service if you wish); that you receive source code or can get
it if you want it; that you can change the software and use pieces of
it in new free programs; and that you are informed that you can do
these things.
To protect your rights, we need to make restrictions that forbid
distributors to deny you these rights or to ask you to surrender these
rights. These restrictions translate to certain responsibilities for
you if you distribute copies of the library or if you modify it.
For example, if you distribute copies of the library, whether gratis
or for a fee, you must give the recipients all the rights that we gave
you. You must make sure that they, too, receive or can get the source
code. If you link other code with the library, you must provide
complete object files to the recipients, so that they can relink them
with the library after making changes to the library and recompiling
it. And you must show them these terms so they know their rights.
We protect your rights with a two-step method: (1) we copyright the
library, and (2) we offer you this license, which gives you legal
permission to copy, distribute and/or modify the library.
To protect each distributor, we want to make it very clear that
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That's all there is to it!

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NO_COLOR=\033[0m
OK_COLOR=\033[0;32m
all: format vet lint
format:
@echo "$(OK_COLOR)==> Formatting the code $(NO_COLOR)"
@gofmt -s -w *.go
@goimports -w *.go || true
test:
@echo "$(OK_COLOR)==> Running go test $(NO_COLOR)"
@sudo `which go` test -v
test-race:
@echo "$(OK_COLOR)==> Running go test $(NO_COLOR)"
@sudo `which go` test -race -v
test-unprivileged:
@echo "$(OK_COLOR)==> Running go test for unprivileged user$(NO_COLOR)"
@`which go` test -v
test-unprivileged-race:
@echo "$(OK_COLOR)==> Running go test for unprivileged user$(NO_COLOR)"
@`which go` test -race -v
cover:
@sudo `which go` test -v -coverprofile=coverage.out
@`which go` tool cover -func=coverage.out
doc:
@`which godoc` gopkg.in/lxc/go-lxc.v2 | less
vet:
@echo "$(OK_COLOR)==> Running go vet $(NO_COLOR)"
@`which go` vet .
lint:
@echo "$(OK_COLOR)==> Running golint $(NO_COLOR)"
@`which golint` . || true
escape-analysis:
@go build -gcflags -m
ctags:
@ctags -R --languages=c,go
scope:
@echo "$(OK_COLOR)==> Exported container calls in container.go $(NO_COLOR)"
@/bin/grep -E "\bc+\.([A-Z])\w+" container.go || true
setup-test-cgroup:
for d in /sys/fs/cgroup/*; do \
[ -f $$d/cgroup.clone_children ] && echo 1 | sudo tee $$d/cgroup.clone_children; \
[ -f $$d/cgroup.use_hierarchy ] && echo 1 | sudo tee $$d/cgroup.use_hierarchy; \
sudo mkdir -p $$d/lxc; \
sudo chown -R $$USER: $$d/lxc; \
done
.PHONY: all format test doc vet lint ctags

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# Go Bindings for LXC (Linux Containers)
This package implements [Go](http://golang.org) bindings for the [LXC](http://linuxcontainers.org/) C API (liblxc).
## Requirements
This package requires [LXC 1.x](https://github.com/lxc/lxc/releases) and its development package to be installed. Works with [Go 1.x](http://golang.org/dl). Following command should install required dependencies on Ubuntu:
apt-get install -y pkg-config lxc-dev
## Installing
To install it, run:
go get gopkg.in/lxc/go-lxc.v2
## Documentation
Documentation can be found at [GoDoc](http://godoc.org/gopkg.in/lxc/go-lxc.v2).
## Stability
The package API will remain stable as described in [gopkg.in](https://gopkg.in).
## Examples
See the [examples](https://github.com/lxc/go-lxc/tree/v2/examples) directory for some.
## Contributing
We'd love to see go-lxc improve. To contribute to go-lxc;
* **Fork** the repository
* **Modify** your fork
* Ensure your fork **passes all tests**
* **Send** a pull request
* Bonus points if the pull request includes *what* you changed, *why* you changed it, and *tests* attached.
* For the love of all that is holy, please use `go fmt` *before* you send the pull request.
We'll review it and merge it in if it's appropriate.

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/*
Package lxc provides Go Bindings for LXC (Linux Containers) C API.
LXC (LinuX Containers) is an operating system–level virtualization method for running multiple isolated Linux systems (containers) on a single control host.
LXC combines cgroups and namespace support to provide an isolated environment for applications.
*/
package lxc

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// Copyright © 2013, 2014, The Go-LXC Authors. All rights reserved.
// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
// +build linux,cgo
package lxc
var (
ErrAddDeviceNodeFailed = NewError("adding device to container failed")
ErrAllocationFailed = NewError("allocating memory failed")
ErrAlreadyDefined = NewError("container already defined")
ErrAlreadyFrozen = NewError("container is already frozen")
ErrAlreadyRunning = NewError("container is already running")
ErrAttachFailed = NewError("attaching to the container failed")
ErrAttachInterfaceFailed = NewError("attaching specified netdev to the container failed")
ErrBlkioUsage = NewError("BlkioUsage for the container failed")
ErrCheckpointFailed = NewError("checkpoint failed")
ErrClearingConfigItemFailed = NewError("clearing config item for the container failed")
ErrClearingCgroupItemFailed = NewError("clearing cgroup item for the container failed")
ErrCloneFailed = NewError("cloning the container failed")
ErrCloseAllFdsFailed = NewError("setting close_all_fds flag for container failed")
ErrCreateFailed = NewError("creating the container failed")
ErrCreateSnapshotFailed = NewError("snapshotting the container failed")
ErrDaemonizeFailed = NewError("setting daemonize flag for container failed")
ErrDestroyAllSnapshotsFailed = NewError("destroying all snapshots failed")
ErrDestroyFailed = NewError("destroying the container failed")
ErrDestroySnapshotFailed = NewError("destroying the snapshot failed")
ErrDestroyWithAllSnapshotsFailed = NewError("destroying the container with all snapshots failed")
ErrDetachInterfaceFailed = NewError("detaching specified netdev to the container failed")
ErrExecuteFailed = NewError("executing the command in a temporary container failed")
ErrFreezeFailed = NewError("freezing the container failed")
ErrInsufficientNumberOfArguments = NewError("insufficient number of arguments were supplied")
ErrInterfaces = NewError("getting interface names for the container failed")
ErrIPAddresses = NewError("getting IP addresses of the container failed")
ErrIPAddress = NewError("getting IP address on the interface of the container failed")
ErrIPv4Addresses = NewError("getting IPv4 addresses of the container failed")
ErrIPv6Addresses = NewError("getting IPv6 addresses of the container failed")
ErrKMemLimit = NewError("your kernel does not support cgroup kernel memory controller")
ErrLoadConfigFailed = NewError("loading config file for the container failed")
ErrMemLimit = NewError("your kernel does not support cgroup memory controller")
ErrMemorySwapLimit = NewError("your kernel does not support cgroup swap controller")
ErrMethodNotAllowed = NewError("the requested method is not currently supported with unprivileged containers")
ErrNewFailed = NewError("allocating the container failed")
ErrNoSnapshot = NewError("container has no snapshot")
ErrNotDefined = NewError("container is not defined")
ErrNotFrozen = NewError("container is not frozen")
ErrNotRunning = NewError("container is not running")
ErrNotSupported = NewError("method is not supported by this LXC version")
ErrRebootFailed = NewError("rebooting the container failed")
ErrRemoveDeviceNodeFailed = NewError("removing device from container failed")
ErrRenameFailed = NewError("renaming the container failed")
ErrRestoreFailed = NewError("restore failed")
ErrRestoreSnapshotFailed = NewError("restoring the container failed")
ErrSaveConfigFailed = NewError("saving config file for the container failed")
ErrSettingCgroupItemFailed = NewError("setting cgroup item for the container failed")
ErrSettingConfigItemFailed = NewError("setting config item for the container failed")
ErrSettingConfigPathFailed = NewError("setting config file for the container failed")
ErrSettingKMemoryLimitFailed = NewError("setting kernel memory limit for the container failed")
ErrSettingMemoryLimitFailed = NewError("setting memory limit for the container failed")
ErrSettingMemorySwapLimitFailed = NewError("setting memory+swap limit for the container failed")
ErrSettingSoftMemoryLimitFailed = NewError("setting soft memory limit for the container failed")
ErrShutdownFailed = NewError("shutting down the container failed")
ErrSoftMemLimit = NewError("your kernel does not support cgroup memory controller")
ErrStartFailed = NewError("starting the container failed")
ErrStopFailed = NewError("stopping the container failed")
ErrTemplateNotAllowed = NewError("unprivileged users only allowed to use \"download\" template")
ErrUnfreezeFailed = NewError("unfreezing the container failed")
ErrUnknownBackendStore = NewError("unknown backend type")
)
// Error represents a basic error that implies the error interface.
type Error struct {
Message string
}
// NewError creates a new error with the given msg argument.
func NewError(msg string) error {
return &Error{
Message: msg,
}
}
func (e *Error) Error() string {
return e.Message
}

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@ -1,503 +0,0 @@
// Copyright © 2013, 2014, The Go-LXC Authors. All rights reserved.
// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
// +build linux,cgo
#include <stdbool.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <lxc/lxccontainer.h>
#include <lxc/attach_options.h>
#include <lxc/version.h>
#include "lxc-binding.h"
#ifndef LXC_DEVEL
#define LXC_DEVEL 0
#endif
bool go_lxc_defined(struct lxc_container *c) {
return c->is_defined(c);
}
const char* go_lxc_state(struct lxc_container *c) {
return c->state(c);
}
bool go_lxc_running(struct lxc_container *c) {
return c->is_running(c);
}
bool go_lxc_freeze(struct lxc_container *c) {
return c->freeze(c);
}
bool go_lxc_unfreeze(struct lxc_container *c) {
return c->unfreeze(c);
}
pid_t go_lxc_init_pid(struct lxc_container *c) {
return c->init_pid(c);
}
bool go_lxc_want_daemonize(struct lxc_container *c, bool state) {
return c->want_daemonize(c, state);
}
bool go_lxc_want_close_all_fds(struct lxc_container *c, bool state) {
return c->want_close_all_fds(c, state);
}
bool go_lxc_create(struct lxc_container *c, const char *t, const char *bdevtype, int flags, char * const argv[]) {
return c->create(c, t, bdevtype, NULL, !!(flags & LXC_CREATE_QUIET), argv);
}
bool go_lxc_start(struct lxc_container *c, int useinit, char * const argv[]) {
return c->start(c, useinit, argv);
}
bool go_lxc_stop(struct lxc_container *c) {
return c->stop(c);
}
bool go_lxc_reboot(struct lxc_container *c) {
return c->reboot(c);
}
bool go_lxc_shutdown(struct lxc_container *c, int timeout) {
return c->shutdown(c, timeout);
}
char* go_lxc_config_file_name(struct lxc_container *c) {
return c->config_file_name(c);
}
bool go_lxc_destroy(struct lxc_container *c) {
return c->destroy(c);
}
bool go_lxc_destroy_with_snapshots(struct lxc_container *c) {
#if VERSION_AT_LEAST(1, 1, 0)
return c->destroy_with_snapshots(c);
#else
return false;
#endif
}
bool go_lxc_wait(struct lxc_container *c, const char *state, int timeout) {
return c->wait(c, state, timeout);
}
char *go_lxc_get_config_item(struct lxc_container *c, const char *key)
{
char *value = NULL;
int len = c->get_config_item(c, key, NULL, 0);
if (len <= 0)
return NULL;
again:
value = (char *)malloc(sizeof(char) * len + 1);
if (value == NULL)
goto again;
if (c->get_config_item(c, key, value, len + 1) != len) {
free(value);
return NULL;
}
return value;
}
bool go_lxc_set_config_item(struct lxc_container *c, const char *key, const char *value) {
return c->set_config_item(c, key, value);
}
void go_lxc_clear_config(struct lxc_container *c) {
c->clear_config(c);
}
bool go_lxc_clear_config_item(struct lxc_container *c, const char *key) {
return c->clear_config_item(c, key);
}
char* go_lxc_get_running_config_item(struct lxc_container *c, const char *key) {
return c->get_running_config_item(c, key);
}
char *go_lxc_get_keys(struct lxc_container *c, const char *key)
{
char *value = NULL;
int len = c->get_keys(c, key, NULL, 0);
if (len <= 0)
return NULL;
again:
value = (char *)malloc(sizeof(char) * len + 1);
if (value == NULL)
goto again;
if (c->get_keys(c, key, value, len + 1) != len) {
free(value);
return NULL;
}
return value;
}
char *go_lxc_get_cgroup_item(struct lxc_container *c, const char *key)
{
char *value = NULL;
int len = c->get_cgroup_item(c, key, NULL, 0);
if (len <= 0)
return NULL;
again:
value = (char *)malloc(sizeof(char) * len + 1);
if (value == NULL)
goto again;
if (c->get_cgroup_item(c, key, value, len + 1) != len) {
free(value);
return NULL;
}
return value;
}
bool go_lxc_set_cgroup_item(struct lxc_container *c, const char *key, const char *value) {
return c->set_cgroup_item(c, key, value);
}
const char* go_lxc_get_config_path(struct lxc_container *c) {
return c->get_config_path(c);
}
bool go_lxc_set_config_path(struct lxc_container *c, const char *path) {
return c->set_config_path(c, path);
}
bool go_lxc_load_config(struct lxc_container *c, const char *alt_file) {
return c->load_config(c, alt_file);
}
bool go_lxc_save_config(struct lxc_container *c, const char *alt_file) {
return c->save_config(c, alt_file);
}
bool go_lxc_clone(struct lxc_container *c, const char *newname, const char *lxcpath, int flags, const char *bdevtype) {
return c->clone(c, newname, lxcpath, flags, bdevtype, NULL, 0, NULL) != NULL;
}
int go_lxc_console_getfd(struct lxc_container *c, int ttynum) {
int masterfd;
int ret = 0;
ret = c->console_getfd(c, &ttynum, &masterfd);
if (ret < 0)
return ret;
return masterfd;
}
bool go_lxc_console(struct lxc_container *c, int ttynum, int stdinfd, int stdoutfd, int stderrfd, int escape) {
if (c->console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape) == 0) {
return true;
}
return false;
}
char** go_lxc_get_interfaces(struct lxc_container *c) {
return c->get_interfaces(c);
}
char** go_lxc_get_ips(struct lxc_container *c, const char *interface, const char *family, int scope) {
return c->get_ips(c, interface, family, scope);
}
int wait_for_pid_status(pid_t pid)
{
int status, ret;
again:
ret = waitpid(pid, &status, 0);
if (ret == -1) {
if (errno == EINTR)
goto again;
return -1;
}
if (ret != pid)
goto again;
return status;
}
int go_lxc_attach_no_wait(struct lxc_container *c,
bool clear_env,
int namespaces,
long personality,
uid_t uid, gid_t gid,
int stdinfd, int stdoutfd, int stderrfd,
char *initial_cwd,
char **extra_env_vars,
char **extra_keep_env,
const char * const argv[],
pid_t *attached_pid) {
int ret;
lxc_attach_options_t attach_options = LXC_ATTACH_OPTIONS_DEFAULT;
lxc_attach_command_t command = (lxc_attach_command_t){.program = NULL};
attach_options.env_policy = LXC_ATTACH_KEEP_ENV;
if (clear_env) {
attach_options.env_policy = LXC_ATTACH_CLEAR_ENV;
}
attach_options.namespaces = namespaces;
attach_options.personality = personality;
attach_options.uid = uid;
attach_options.gid = gid;
attach_options.stdin_fd = stdinfd;
attach_options.stdout_fd = stdoutfd;
attach_options.stderr_fd = stderrfd;
attach_options.initial_cwd = initial_cwd;
attach_options.extra_env_vars = extra_env_vars;
attach_options.extra_keep_env = extra_keep_env;
command.program = (char *)argv[0];
command.argv = (char **)argv;
ret = c->attach(c, lxc_attach_run_command, &command, &attach_options, attached_pid);
if (ret < 0)
return ret;
return 0;
}
int go_lxc_attach(struct lxc_container *c,
bool clear_env,
int namespaces,
long personality,
uid_t uid, gid_t gid,
int stdinfd, int stdoutfd, int stderrfd,
char *initial_cwd,
char **extra_env_vars,
char **extra_keep_env) {
int ret;
pid_t pid;
lxc_attach_options_t attach_options = LXC_ATTACH_OPTIONS_DEFAULT;
attach_options.env_policy = LXC_ATTACH_KEEP_ENV;
if (clear_env) {
attach_options.env_policy = LXC_ATTACH_CLEAR_ENV;
}
attach_options.namespaces = namespaces;
attach_options.personality = personality;
attach_options.uid = uid;
attach_options.gid = gid;
attach_options.stdin_fd = stdinfd;
attach_options.stdout_fd = stdoutfd;
attach_options.stderr_fd = stderrfd;
attach_options.initial_cwd = initial_cwd;
attach_options.extra_env_vars = extra_env_vars;
attach_options.extra_keep_env = extra_keep_env;
/*
remount_sys_proc
When using -s and the mount namespace is not included, this flag will cause lxc-attach to remount /proc and /sys to reflect the current other namespace contexts.
default_options.attach_flags |= LXC_ATTACH_REMOUNT_PROC_SYS;
elevated_privileges
Do not drop privileges when running command inside the container. If this option is specified, the new process will not be added to the container's cgroup(s) and it will not drop its capabilities before executing.
default_options.attach_flags &= ~(LXC_ATTACH_MOVE_TO_CGROUP | LXC_ATTACH_DROP_CAPABILITIES | LXC_ATTACH_APPARMOR);
*/
ret = c->attach(c, lxc_attach_run_shell, NULL, &attach_options, &pid);
if (ret < 0)
return ret;
ret = wait_for_pid_status(pid);
if (ret < 0)
return ret;
if (WIFEXITED(ret))
return WEXITSTATUS(ret);
return ret;
}
int go_lxc_attach_run_wait(struct lxc_container *c,
bool clear_env,
int namespaces,
long personality,
uid_t uid, gid_t gid,
int stdinfd, int stdoutfd, int stderrfd,
char *initial_cwd,
char **extra_env_vars,
char **extra_keep_env,
const char * const argv[]) {
int ret;
lxc_attach_options_t attach_options = LXC_ATTACH_OPTIONS_DEFAULT;
attach_options.env_policy = LXC_ATTACH_KEEP_ENV;
if (clear_env) {
attach_options.env_policy = LXC_ATTACH_CLEAR_ENV;
}
attach_options.namespaces = namespaces;
attach_options.personality = personality;
attach_options.uid = uid;
attach_options.gid = gid;
attach_options.stdin_fd = stdinfd;
attach_options.stdout_fd = stdoutfd;
attach_options.stderr_fd = stderrfd;
attach_options.initial_cwd = initial_cwd;
attach_options.extra_env_vars = extra_env_vars;
attach_options.extra_keep_env = extra_keep_env;
ret = c->attach_run_wait(c, &attach_options, argv[0], argv);
if (WIFEXITED(ret) && WEXITSTATUS(ret) == 255)
return -1;
return ret;
}
bool go_lxc_may_control(struct lxc_container *c) {
return c->may_control(c);
}
int go_lxc_snapshot(struct lxc_container *c) {
return c->snapshot(c, NULL);
}
int go_lxc_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret) {
return c->snapshot_list(c, ret);
}
bool go_lxc_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) {
return c->snapshot_restore(c, snapname, newname);
}
bool go_lxc_snapshot_destroy(struct lxc_container *c, const char *snapname) {
return c->snapshot_destroy(c, snapname);
}
bool go_lxc_snapshot_destroy_all(struct lxc_container *c) {
#if VERSION_AT_LEAST(1, 1, 0)
return c->snapshot_destroy_all(c);
#else
return false;
#endif
}
bool go_lxc_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) {
return c->add_device_node(c, src_path, dest_path);
}
bool go_lxc_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) {
return c->remove_device_node(c, src_path, dest_path);
}
bool go_lxc_rename(struct lxc_container *c, const char *newname) {
return c->rename(c, newname);
}
bool go_lxc_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) {
#if VERSION_AT_LEAST(1, 1, 0)
return c->checkpoint(c, directory, stop, verbose);
#else
return false;
#endif
}
bool go_lxc_restore(struct lxc_container *c, char *directory, bool verbose) {
#if VERSION_AT_LEAST(1, 1, 0)
return c->restore(c, directory, verbose);
#else
return false;
#endif
}
int go_lxc_migrate(struct lxc_container *c, unsigned int cmd, struct migrate_opts *opts, struct extra_migrate_opts *extras) {
#if VERSION_AT_LEAST(3, 0, 0)
opts->features_to_check = extras->features_to_check;
#endif
#if VERSION_AT_LEAST(2, 0, 4)
opts->action_script = extras->action_script;
opts->ghost_limit = extras->ghost_limit;
#endif
#if VERSION_AT_LEAST(2, 0, 1)
opts->preserves_inodes = extras->preserves_inodes;
#endif
#if VERSION_AT_LEAST(2, 0, 0)
return c->migrate(c, cmd, opts, sizeof(*opts));
#else
return -EINVAL;
#endif
}
bool go_lxc_attach_interface(struct lxc_container *c, const char *dev, const char *dst_dev) {
#if VERSION_AT_LEAST(1, 1, 0)
return c->attach_interface(c, dev, dst_dev);
#else
return false;
#endif
}
bool go_lxc_detach_interface(struct lxc_container *c, const char *dev, const char *dst_dev) {
#if VERSION_AT_LEAST(1, 1, 0)
return c->detach_interface(c, dev, dst_dev);
#else
return false;
#endif
}
bool go_lxc_config_item_is_supported(const char *key)
{
#if VERSION_AT_LEAST(2, 1, 0)
return lxc_config_item_is_supported(key);
#else
return false;
#endif
}
int go_lxc_error_num(struct lxc_container *c)
{
return c->error_num;
}
int go_lxc_console_log(struct lxc_container *c, struct lxc_console_log *log) {
#if VERSION_AT_LEAST(3, 0, 0)
return c->console_log(c, log);
#else
return false;
#endif
}
bool go_lxc_has_api_extension(const char *extension)
{
#if VERSION_AT_LEAST(3, 1, 0)
return lxc_has_api_extension(extension);
#else
return false;
#endif
}

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vendor/gopkg.in/lxc/go-lxc.v2/lxc-binding.go generated vendored
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@ -1,326 +0,0 @@
// Copyright © 2013, 2014, The Go-LXC Authors. All rights reserved.
// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
// +build linux,cgo
package lxc
// #cgo pkg-config: lxc
// #cgo LDFLAGS: -llxc -lutil
// #include <lxc/lxccontainer.h>
// #include <lxc/version.h>
// #include "lxc-binding.h"
// #ifndef LXC_DEVEL
// #define LXC_DEVEL 0
// #endif
import "C"
import (
"fmt"
"runtime"
"strconv"
"strings"
"unsafe"
)
// NewContainer returns a new container struct.
func NewContainer(name string, lxcpath ...string) (*Container, error) {
var container *C.struct_lxc_container
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
container = C.lxc_container_new(cname, clxcpath)
} else {
container = C.lxc_container_new(cname, nil)
}
if container == nil {
return nil, ErrNewFailed
}
c := &Container{container: container, verbosity: Quiet}
// http://golang.org/pkg/runtime/#SetFinalizer
runtime.SetFinalizer(c, Release)
return c, nil
}
// Acquire increments the reference counter of the container object.
func Acquire(c *Container) bool {
return C.lxc_container_get(c.container) == 1
}
// Release decrements the reference counter of the container object.
func Release(c *Container) bool {
// http://golang.org/pkg/runtime/#SetFinalizer
runtime.SetFinalizer(c, nil)
// Go is bad at refcounting sometimes
c.mu.Lock()
return C.lxc_container_put(c.container) == 1
}
// Version returns the LXC version.
func Version() string {
version := C.GoString(C.lxc_get_version())
// New liblxc versions append "-devel" when LXC_DEVEL is set.
if strings.HasSuffix(version, "-devel") {
return fmt.Sprintf("%s (devel)", version[:(len(version)-len("-devel"))])
}
return version
}
// GlobalConfigItem returns the value of the given global config key.
func GlobalConfigItem(name string) string {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
return C.GoString(C.lxc_get_global_config_item(cname))
}
// DefaultConfigPath returns default config path.
func DefaultConfigPath() string {
return GlobalConfigItem("lxc.lxcpath")
}
// DefaultLvmVg returns the name of the default LVM volume group.
func DefaultLvmVg() string {
return GlobalConfigItem("lxc.bdev.lvm.vg")
}
// DefaultZfsRoot returns the name of the default ZFS root.
func DefaultZfsRoot() string {
return GlobalConfigItem("lxc.bdev.zfs.root")
}
// ContainerNames returns the names of defined and active containers on the system.
func ContainerNames(lxcpath ...string) []string {
var size int
var cnames **C.char
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
size = int(C.list_all_containers(clxcpath, &cnames, nil))
} else {
size = int(C.list_all_containers(nil, &cnames, nil))
}
if size < 1 {
return nil
}
return convertNArgs(cnames, size)
}
// Containers returns the defined and active containers on the system. Only
// containers that could retrieved successfully are returned.
func Containers(lxcpath ...string) []*Container {
var containers []*Container
for _, v := range ContainerNames(lxcpath...) {
if container, err := NewContainer(v, lxcpath...); err == nil {
containers = append(containers, container)
}
}
return containers
}
// DefinedContainerNames returns the names of the defined containers on the system.
func DefinedContainerNames(lxcpath ...string) []string {
var size int
var cnames **C.char
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
size = int(C.list_defined_containers(clxcpath, &cnames, nil))
} else {
size = int(C.list_defined_containers(nil, &cnames, nil))
}
if size < 1 {
return nil
}
return convertNArgs(cnames, size)
}
// DefinedContainers returns the defined containers on the system. Only
// containers that could retrieved successfully are returned.
func DefinedContainers(lxcpath ...string) []*Container {
var containers []*Container
for _, v := range DefinedContainerNames(lxcpath...) {
if container, err := NewContainer(v, lxcpath...); err == nil {
containers = append(containers, container)
}
}
return containers
}
// ActiveContainerNames returns the names of the active containers on the system.
func ActiveContainerNames(lxcpath ...string) []string {
var size int
var cnames **C.char
if lxcpath != nil && len(lxcpath) == 1 {
clxcpath := C.CString(lxcpath[0])
defer C.free(unsafe.Pointer(clxcpath))
size = int(C.list_active_containers(clxcpath, &cnames, nil))
} else {
size = int(C.list_active_containers(nil, &cnames, nil))
}
if size < 1 {
return nil
}
return convertNArgs(cnames, size)
}
// ActiveContainers returns the active containers on the system. Only
// containers that could retrieved successfully are returned.
func ActiveContainers(lxcpath ...string) []*Container {
var containers []*Container
for _, v := range ActiveContainerNames(lxcpath...) {
if container, err := NewContainer(v, lxcpath...); err == nil {
containers = append(containers, container)
}
}
return containers
}
// VersionNumber returns the LXC version.
func VersionNumber() (major int, minor int) {
major = C.LXC_VERSION_MAJOR
minor = C.LXC_VERSION_MINOR
return
}
// VersionAtLeast returns true when the tested version >= current version.
func VersionAtLeast(major int, minor int, micro int) bool {
if C.LXC_DEVEL == 1 {
return true
}
if major > C.LXC_VERSION_MAJOR {
return false
}
if major == C.LXC_VERSION_MAJOR &&
minor > C.LXC_VERSION_MINOR {
return false
}
if major == C.LXC_VERSION_MAJOR &&
minor == C.LXC_VERSION_MINOR &&
micro > C.LXC_VERSION_MICRO {
return false
}
return true
}
// IsSupportedConfigItem returns true if the key belongs to a supported config item.
func IsSupportedConfigItem(key string) bool {
configItem := C.CString(key)
defer C.free(unsafe.Pointer(configItem))
return bool(C.go_lxc_config_item_is_supported(configItem))
}
// runtimeLiblxcVersionAtLeast checks if the system's liblxc matches the
// provided version requirement
func runtimeLiblxcVersionAtLeast(major int, minor int, micro int) bool {
version := Version()
version = strings.Replace(version, " (devel)", "-devel", 1)
parts := strings.Split(version, ".")
partsLen := len(parts)
if partsLen == 0 {
return false
}
develParts := strings.Split(parts[partsLen-1], "-")
if len(develParts) == 2 && develParts[1] == "devel" {
return true
}
maj := -1
min := -1
mic := -1
for i, v := range parts {
if i > 2 {
break
}
num, err := strconv.Atoi(v)
if err != nil {
return false
}
switch i {
case 0:
maj = num
case 1:
min = num
case 2:
mic = num
}
}
/* Major version is greater. */
if maj > major {
return true
}
if maj < major {
return false
}
/* Minor number is greater.*/
if min > minor {
return true
}
if min < minor {
return false
}
/* Patch number is greater. */
if mic > micro {
return true
}
if mic < micro {
return false
}
return true
}
// HasApiExtension returns true if the extension is supported.
func HasApiExtension(extension string) bool {
if runtimeLiblxcVersionAtLeast(3, 1, 0) {
apiExtension := C.CString(extension)
defer C.free(unsafe.Pointer(apiExtension))
return bool(C.go_lxc_has_api_extension(apiExtension))
}
return false
}

127
vendor/gopkg.in/lxc/go-lxc.v2/lxc-binding.h generated vendored
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@ -1,127 +0,0 @@
// Copyright © 2013, 2014, The Go-LXC Authors. All rights reserved.
// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
#define VERSION_AT_LEAST(major, minor, micro) \
((LXC_DEVEL == 1) || (!(major > LXC_VERSION_MAJOR || \
major == LXC_VERSION_MAJOR && minor > LXC_VERSION_MINOR || \
major == LXC_VERSION_MAJOR && minor == LXC_VERSION_MINOR && micro > LXC_VERSION_MICRO)))
extern bool go_lxc_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path);
extern void go_lxc_clear_config(struct lxc_container *c);
extern bool go_lxc_clear_config_item(struct lxc_container *c, const char *key);
extern bool go_lxc_clone(struct lxc_container *c, const char *newname, const char *lxcpath, int flags, const char *bdevtype);
extern bool go_lxc_console(struct lxc_container *c, int ttynum, int stdinfd, int stdoutfd, int stderrfd, int escape);
extern bool go_lxc_create(struct lxc_container *c, const char *t, const char *bdevtype, int flags, char * const argv[]);
extern bool go_lxc_defined(struct lxc_container *c);
extern bool go_lxc_destroy(struct lxc_container *c);
extern bool go_lxc_destroy_with_snapshots(struct lxc_container *c);
extern bool go_lxc_freeze(struct lxc_container *c);
extern bool go_lxc_load_config(struct lxc_container *c, const char *alt_file);
extern bool go_lxc_may_control(struct lxc_container *c);
extern bool go_lxc_reboot(struct lxc_container *c);
extern bool go_lxc_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path);
extern bool go_lxc_rename(struct lxc_container *c, const char *newname);
extern bool go_lxc_running(struct lxc_container *c);
extern bool go_lxc_save_config(struct lxc_container *c, const char *alt_file);
extern bool go_lxc_set_cgroup_item(struct lxc_container *c, const char *key, const char *value);
extern bool go_lxc_set_config_item(struct lxc_container *c, const char *key, const char *value);
extern bool go_lxc_set_config_path(struct lxc_container *c, const char *path);
extern bool go_lxc_shutdown(struct lxc_container *c, int timeout);
extern bool go_lxc_snapshot_destroy(struct lxc_container *c, const char *snapname);
extern bool go_lxc_snapshot_destroy_all(struct lxc_container *c);
extern bool go_lxc_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname);
extern bool go_lxc_start(struct lxc_container *c, int useinit, char * const argv[]);
extern bool go_lxc_stop(struct lxc_container *c);
extern bool go_lxc_unfreeze(struct lxc_container *c);
extern bool go_lxc_wait(struct lxc_container *c, const char *state, int timeout);
extern bool go_lxc_want_close_all_fds(struct lxc_container *c, bool state);
extern bool go_lxc_want_daemonize(struct lxc_container *c, bool state);
extern char* go_lxc_config_file_name(struct lxc_container *c);
extern char* go_lxc_get_cgroup_item(struct lxc_container *c, const char *key);
extern char* go_lxc_get_config_item(struct lxc_container *c, const char *key);
extern char** go_lxc_get_interfaces(struct lxc_container *c);
extern char** go_lxc_get_ips(struct lxc_container *c, const char *interface, const char *family, int scope);
extern char* go_lxc_get_keys(struct lxc_container *c, const char *key);
extern char* go_lxc_get_running_config_item(struct lxc_container *c, const char *key);
extern const char* go_lxc_get_config_path(struct lxc_container *c);
extern const char* go_lxc_state(struct lxc_container *c);
extern int go_lxc_attach_run_wait(struct lxc_container *c,
bool clear_env,
int namespaces,
long personality,
uid_t uid, gid_t gid,
int stdinfd, int stdoutfd, int stderrfd,
char *initial_cwd,
char **extra_env_vars,
char **extra_keep_env,
const char * const argv[]);
extern int go_lxc_attach(struct lxc_container *c,
bool clear_env,
int namespaces,
long personality,
uid_t uid, gid_t gid,
int stdinfd, int stdoutfd, int stderrfd,
char *initial_cwd,
char **extra_env_vars,
char **extra_keep_env);
extern int go_lxc_attach_no_wait(struct lxc_container *c,
bool clear_env,
int namespaces,
long personality,
uid_t uid, gid_t gid,
int stdinfd, int stdoutfd, int stderrfd,
char *initial_cwd,
char **extra_env_vars,
char **extra_keep_env,
const char * const argv[],
pid_t *attached_pid);
extern int go_lxc_console_getfd(struct lxc_container *c, int ttynum);
extern int go_lxc_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret);
extern int go_lxc_snapshot(struct lxc_container *c);
extern pid_t go_lxc_init_pid(struct lxc_container *c);
extern bool go_lxc_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose);
extern bool go_lxc_restore(struct lxc_container *c, char *directory, bool verbose);
extern bool go_lxc_config_item_is_supported(const char *key);
extern bool go_lxc_has_api_extension(const char *extension);
/* n.b. that we're just adding the fields here to shorten the definition
* of go_lxc_migrate; in the case where we don't have the ->migrate API call,
* we don't want to have to pass all the arguments in to let conditional
* compilation handle things, but the call will still fail
*/
#if !VERSION_AT_LEAST(2, 0, 0)
struct migrate_opts {
char *directory;
bool verbose;
bool stop;
char *predump_dir;
};
#endif
/* This is a struct that we can add "extra" (i.e. options added after 2.0.0)
* migrate options to, so that we don't have to have a massive function
* signature when the list of options grows.
*/
struct extra_migrate_opts {
bool preserves_inodes;
char *action_script;
uint64_t ghost_limit;
uint64_t features_to_check;
};
int go_lxc_migrate(struct lxc_container *c, unsigned int cmd, struct migrate_opts *opts, struct extra_migrate_opts *extras);
extern bool go_lxc_attach_interface(struct lxc_container *c, const char *dev, const char *dst_dev);
extern bool go_lxc_detach_interface(struct lxc_container *c, const char *dev, const char *dst_dev);
#if !VERSION_AT_LEAST(3, 0, 0)
struct lxc_console_log {
bool clear;
bool read;
uint64_t *read_max;
char *data;
};
#endif
extern int go_lxc_console_log(struct lxc_container *c, struct lxc_console_log *log);
extern int go_lxc_error_num(struct lxc_container *c);

209
vendor/gopkg.in/lxc/go-lxc.v2/options.go generated vendored
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@ -1,209 +0,0 @@
// Copyright © 2013, 2014, The Go-LXC Authors. All rights reserved.
// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
// +build linux,cgo
package lxc
import (
"os"
)
// AttachOptions type is used for defining various attach options.
type AttachOptions struct {
// Specify the namespaces to attach to, as OR'ed list of clone flags (syscall.CLONE_NEWNS | syscall.CLONE_NEWUTS ...).
Namespaces int
// Specify the architecture which the kernel should appear to be running as to the command executed.
Arch Personality
// Cwd specifies the working directory of the command.
Cwd string
// UID specifies the user id to run as.
UID int
// GID specifies the group id to run as.
GID int
// If ClearEnv is true the environment is cleared before running the command.
ClearEnv bool
// Env specifies the environment of the process.
Env []string
// EnvToKeep specifies the environment of the process when ClearEnv is true.
EnvToKeep []string
// StdinFd specifies the fd to read input from.
StdinFd uintptr
// StdoutFd specifies the fd to write output to.
StdoutFd uintptr
// StderrFd specifies the fd to write error output to.
StderrFd uintptr
}
// DefaultAttachOptions is a convenient set of options to be used.
var DefaultAttachOptions = AttachOptions{
Namespaces: -1,
Arch: -1,
Cwd: "/",
UID: -1,
GID: -1,
ClearEnv: false,
Env: nil,
EnvToKeep: nil,
StdinFd: os.Stdin.Fd(),
StdoutFd: os.Stdout.Fd(),
StderrFd: os.Stderr.Fd(),
}
// TemplateOptions type is used for defining various template options.
type TemplateOptions struct {
// Template specifies the name of the template.
Template string
// Backend specifies the type of the backend.
Backend BackendStore
// Distro specifies the name of the distribution.
Distro string
// Release specifies the name/version of the distribution.
Release string
// Arch specified the architecture of the container.
Arch string
// Variant specifies the variant of the image (default: "default").
Variant string
// Image server (default: "images.linuxcontainers.org").
Server string
// GPG keyid (default: 0x...).
KeyID string
// GPG keyserver to use.
KeyServer string
// Disable GPG validation (not recommended).
DisableGPGValidation bool
// Flush the local copy (if present).
FlushCache bool
// Force the use of the local copy even if expired.
ForceCache bool
// ExtraArgs provides a way to specify template specific args.
ExtraArgs []string
}
// DownloadTemplateOptions is a convenient set of options for "download" template.
var DownloadTemplateOptions = TemplateOptions{
Template: "download",
Distro: "ubuntu",
Release: "trusty",
Arch: "amd64",
}
// BusyboxTemplateOptions is a convenient set of options for "busybox" template.
var BusyboxTemplateOptions = TemplateOptions{
Template: "busybox",
}
// UbuntuTemplateOptions is a convenient set of options for "ubuntu" template.
var UbuntuTemplateOptions = TemplateOptions{
Template: "ubuntu",
}
// ConsoleOptions type is used for defining various console options.
type ConsoleOptions struct {
// Tty number to attempt to allocate, -1 to allocate the first available tty, or 0 to allocate the console.
Tty int
// StdinFd specifies the fd to read input from.
StdinFd uintptr
// StdoutFd specifies the fd to write output to.
StdoutFd uintptr
// StderrFd specifies the fd to write error output to.
StderrFd uintptr
// EscapeCharacter (a means <Ctrl a>, b maens <Ctrl b>).
EscapeCharacter rune
}
// DefaultConsoleOptions is a convenient set of options to be used.
var DefaultConsoleOptions = ConsoleOptions{
Tty: -1,
StdinFd: os.Stdin.Fd(),
StdoutFd: os.Stdout.Fd(),
StderrFd: os.Stderr.Fd(),
EscapeCharacter: 'a',
}
// CloneOptions type is used for defining various clone options.
type CloneOptions struct {
// Backend specifies the type of the backend.
Backend BackendStore
// lxcpath in which to create the new container. If not set the original container's lxcpath will be used.
ConfigPath string
// Do not change the hostname of the container (in the root filesystem).
KeepName bool
// Use the same MAC address as the original container, rather than generating a new random one.
KeepMAC bool
// Create a snapshot rather than copy.
Snapshot bool
}
// DefaultCloneOptions is a convenient set of options to be used.
var DefaultCloneOptions = CloneOptions{
Backend: Directory,
}
// CheckpointOptions type is used for defining checkpoint options for CRIU.
type CheckpointOptions struct {
Directory string
Stop bool
Verbose bool
}
// RestoreOptions type is used for defining restore options for CRIU.
type RestoreOptions struct {
Directory string
Verbose bool
}
// MigrateOptions type is used for defining migrate options.
type MigrateOptions struct {
Directory string
PredumpDir string
ActionScript string
Verbose bool
Stop bool
PreservesInodes bool
GhostLimit uint64
FeaturesToCheck CriuFeatures
}
// ConsoleLogOptioins type is used for defining console log options.
type ConsoleLogOptions struct {
ClearLog bool
ReadLog bool
ReadMax uint64
WriteToLogFile bool
}

274
vendor/gopkg.in/lxc/go-lxc.v2/type.go generated vendored
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@ -1,274 +0,0 @@
// Copyright © 2013, 2014, The Go-LXC Authors. All rights reserved.
// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
// +build linux,cgo
package lxc
// #include <lxc/lxccontainer.h>
import "C"
import "fmt"
// Verbosity type
type Verbosity int
const (
// Quiet makes some API calls not to write anything to stdout
Quiet Verbosity = 1 << iota
// Verbose makes some API calls write to stdout
Verbose
)
// BackendStore type specifies possible backend types.
type BackendStore int
const (
// Btrfs backendstore type
Btrfs BackendStore = iota + 1
// Directory backendstore type
Directory
// LVM backendstore type
LVM
// ZFS backendstore type
ZFS
// Aufs backendstore type
Aufs
// Overlayfs backendstore type
Overlayfs
// Loopback backendstore type
Loopback
// Best backendstore type
Best
)
// BackendStore as string
func (t BackendStore) String() string {
switch t {
case Directory:
return "dir"
case ZFS:
return "zfs"
case Btrfs:
return "btrfs"
case LVM:
return "lvm"
case Aufs:
return "aufs"
case Overlayfs:
return "overlayfs"
case Loopback:
return "loopback"
case Best:
return "best"
}
return ""
}
var backendStoreMap = map[string]BackendStore{
"dir": Directory,
"zfs": ZFS,
"btrfs": Btrfs,
"lvm": LVM,
"aufs": Aufs,
"overlayfs": Overlayfs,
"loopback": Loopback,
"best": Best,
}
// Set is the method to set the flag value, part of the flag.Value interface.
func (t *BackendStore) Set(value string) error {
backend, ok := backendStoreMap[value]
if ok {
*t = backend
return nil
}
return ErrUnknownBackendStore
}
// State type specifies possible container states.
type State int
const (
// STOPPED means container is not running
STOPPED State = iota + 1
// STARTING means container is starting
STARTING
// RUNNING means container is running
RUNNING
// STOPPING means container is stopping
STOPPING
// ABORTING means container is aborting
ABORTING
// FREEZING means container is freezing
FREEZING
// FROZEN means containe is frozen
FROZEN
// THAWED means container is thawed
THAWED
)
// StateMap provides the mapping betweens the state names and states
var StateMap = map[string]State{
"STOPPED": STOPPED,
"STARTING": STARTING,
"RUNNING": RUNNING,
"STOPPING": STOPPING,
"ABORTING": ABORTING,
"FREEZING": FREEZING,
"FROZEN": FROZEN,
"THAWED": THAWED,
}
// State as string
func (t State) String() string {
switch t {
case STOPPED:
return "STOPPED"
case STARTING:
return "STARTING"
case RUNNING:
return "RUNNING"
case STOPPING:
return "STOPPING"
case ABORTING:
return "ABORTING"
case FREEZING:
return "FREEZING"
case FROZEN:
return "FROZEN"
case THAWED:
return "THAWED"
}
return ""
}
// Taken from http://golang.org/doc/effective_go.html#constants
// ByteSize type
type ByteSize float64
const (
_ = iota
// KB - kilobyte
KB ByteSize = 1 << (10 * iota)
// MB - megabyte
MB
// GB - gigabyte
GB
// TB - terabyte
TB
// PB - petabyte
PB
// EB - exabyte
EB
// ZB - zettabyte
ZB
// YB - yottabyte
YB
)
func (b ByteSize) String() string {
switch {
case b >= YB:
return fmt.Sprintf("%.2fYB", b/YB)
case b >= ZB:
return fmt.Sprintf("%.2fZB", b/ZB)
case b >= EB:
return fmt.Sprintf("%.2fEB", b/EB)
case b >= PB:
return fmt.Sprintf("%.2fPB", b/PB)
case b >= TB:
return fmt.Sprintf("%.2fTB", b/TB)
case b >= GB:
return fmt.Sprintf("%.2fGB", b/GB)
case b >= MB:
return fmt.Sprintf("%.2fMB", b/MB)
case b >= KB:
return fmt.Sprintf("%.2fKB", b/KB)
}
return fmt.Sprintf("%.2fB", b)
}
// LogLevel type specifies possible log levels.
type LogLevel int
const (
// TRACE priority
TRACE LogLevel = iota
// DEBUG priority
DEBUG
// INFO priority
INFO
// NOTICE priority
NOTICE
// WARN priority
WARN
// ERROR priority
ERROR
// CRIT priority
CRIT
// ALERT priority
ALERT
// FATAL priority
FATAL
)
var logLevelMap = map[string]LogLevel{
"TRACE": TRACE,
"DEBUG": DEBUG,
"INFO": INFO,
"NOTICE": NOTICE,
"WARN": WARN,
"ERROR": ERROR,
"CRIT": CRIT,
"ALERT": ALERT,
"FATAL": FATAL,
}
func (l LogLevel) String() string {
switch l {
case TRACE:
return "TRACE"
case DEBUG:
return "DEBUG"
case INFO:
return "INFO"
case NOTICE:
return "NOTICE"
case WARN:
return "WARN"
case ERROR:
return "ERROR"
case CRIT:
return "CRIT"
case ALERT:
return "ALERT"
case FATAL:
return "FATAL"
}
return "NOTSET"
}
// Personality allows to set the architecture for the container.
type Personality int64
const (
X86 Personality = 0x0008
X86_64 = 0x0000
)
const (
MIGRATE_PRE_DUMP = 0
MIGRATE_DUMP = 1
MIGRATE_RESTORE = 2
MIGRATE_FEATURE_CHECK = 3
)
type CriuFeatures uint64
const (
FEATURE_MEM_TRACK CriuFeatures = 1 << iota
FEATURE_LAZY_PAGES
)

105
vendor/gopkg.in/lxc/go-lxc.v2/util.go generated vendored
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@ -1,105 +0,0 @@
// Copyright © 2013, 2014, The Go-LXC Authors. All rights reserved.
// Use of this source code is governed by a LGPLv2.1
// license that can be found in the LICENSE file.
// +build linux,cgo
package lxc
/*
#include <stdlib.h>
#include <lxc/lxccontainer.h>
static char** makeCharArray(size_t size) {
// caller checks return value
return calloc(size, sizeof(char*));
}
static void setArrayString(char **array, char *string, size_t n) {
array[n] = string;
}
static void freeCharArray(char **array, size_t size) {
size_t i;
for (i = 0; i < size; i++) {
free(array[i]);
}
free(array);
}
static void freeSnapshotArray(struct lxc_snapshot *s, size_t size) {
size_t i;
for (i = 0; i < size; i++) {
s[i].free(&s[i]);
}
free(s);
}
static size_t getArrayLength(char **array) {
char **p;
size_t size = 0;
for (p = (char **)array; *p; p++) {
size++;
}
return size;
}
*/
import "C"
import (
"reflect"
"unsafe"
)
func makeNullTerminatedArgs(args []string) **C.char {
cparams := C.makeCharArray(C.size_t(len(args) + 1))
if cparams == nil {
return nil
}
for i := 0; i < len(args); i++ {
C.setArrayString(cparams, C.CString(args[i]), C.size_t(i))
}
C.setArrayString(cparams, nil, C.size_t(len(args)))
return cparams
}
func freeNullTerminatedArgs(cArgs **C.char, length int) {
C.freeCharArray(cArgs, C.size_t(length+1))
}
func convertArgs(cArgs **C.char) []string {
if cArgs == nil {
return nil
}
return convertNArgs(cArgs, int(C.getArrayLength(cArgs)))
}
func convertNArgs(cArgs **C.char, size int) []string {
if cArgs == nil || size <= 0 {
return nil
}
var A []*C.char
hdr := reflect.SliceHeader{
Data: uintptr(unsafe.Pointer(cArgs)),
Len: size,
Cap: size,
}
cArgsInterface := reflect.NewAt(reflect.TypeOf(A), unsafe.Pointer(&hdr)).Elem().Interface()
result := make([]string, size)
for i := 0; i < size; i++ {
result[i] = C.GoString(cArgsInterface.([]*C.char)[i])
}
C.freeCharArray(cArgs, C.size_t(size))
return result
}
func freeSnapshots(snapshots *C.struct_lxc_snapshot, size int) {
C.freeSnapshotArray(snapshots, C.size_t(size))
}

1
vendor/vendor.json vendored
View File

@ -438,7 +438,6 @@
{"path":"google.golang.org/grpc/transport","checksumSHA1":"oFGr0JoquaPGVnV86fVL8MVTc3A=","revision":"0c41876308d45bc82e587965971e28be659a1aca","revisionTime":"2017-07-21T17:58:12Z"}, {"path":"google.golang.org/grpc/transport","checksumSHA1":"oFGr0JoquaPGVnV86fVL8MVTc3A=","revision":"0c41876308d45bc82e587965971e28be659a1aca","revisionTime":"2017-07-21T17:58:12Z"},
{"path":"gopkg.in/fsnotify.v1","checksumSHA1":"eIhF+hmL/XZhzTiAwhLD0M65vlY=","revision":"629574ca2a5df945712d3079857300b5e4da0236","revisionTime":"2016-10-11T02:33:12Z"}, {"path":"gopkg.in/fsnotify.v1","checksumSHA1":"eIhF+hmL/XZhzTiAwhLD0M65vlY=","revision":"629574ca2a5df945712d3079857300b5e4da0236","revisionTime":"2016-10-11T02:33:12Z"},
{"path":"gopkg.in/inf.v0","checksumSHA1":"6f8MEU31llHM1sLM/GGH4/Qxu0A=","revision":"3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4","revisionTime":"2015-09-11T12:57:57Z"}, {"path":"gopkg.in/inf.v0","checksumSHA1":"6f8MEU31llHM1sLM/GGH4/Qxu0A=","revision":"3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4","revisionTime":"2015-09-11T12:57:57Z"},
{"path":"gopkg.in/lxc/go-lxc.v2","checksumSHA1":"oAflbBrzWC7OMmZQixkp9bnPQW8=","revision":"0aadfc37157c2e3f0e63bedd10f8615e66e91cad","revisionTime":"2018-11-01T16:03:35Z"},
{"path":"gopkg.in/tomb.v1","checksumSHA1":"TO8baX+t1Qs7EmOYth80MkbKzFo=","revision":"dd632973f1e7218eb1089048e0798ec9ae7dceb8","revisionTime":"2014-10-24T13:56:13Z"}, {"path":"gopkg.in/tomb.v1","checksumSHA1":"TO8baX+t1Qs7EmOYth80MkbKzFo=","revision":"dd632973f1e7218eb1089048e0798ec9ae7dceb8","revisionTime":"2014-10-24T13:56:13Z"},
{"path":"gopkg.in/tomb.v2","checksumSHA1":"WiyCOMvfzRdymImAJ3ME6aoYUdM=","revision":"14b3d72120e8d10ea6e6b7f87f7175734b1faab8","revisionTime":"2014-06-26T14:46:23Z"}, {"path":"gopkg.in/tomb.v2","checksumSHA1":"WiyCOMvfzRdymImAJ3ME6aoYUdM=","revision":"14b3d72120e8d10ea6e6b7f87f7175734b1faab8","revisionTime":"2014-06-26T14:46:23Z"},
{"path":"gopkg.in/yaml.v2","checksumSHA1":"12GqsW8PiRPnezDDy0v4brZrndM=","revision":"a5b47d31c556af34a302ce5d659e6fea44d90de0","revisionTime":"2016-09-28T15:37:09Z"} {"path":"gopkg.in/yaml.v2","checksumSHA1":"12GqsW8PiRPnezDDy0v4brZrndM=","revision":"a5b47d31c556af34a302ce5d659e6fea44d90de0","revisionTime":"2016-09-28T15:37:09Z"}