Mahmood Ali
GitHub
commit
67d16d22b1
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@ -153,7 +153,8 @@ func (d *LxcDriver) Validate(config map[string]interface{}) error {
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return err
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}
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volumes, _ := fd.GetOk("volumes")
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volumes, ok := fd.GetOk("volumes")
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if ok {
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for _, volDesc := range volumes.([]interface{}) {
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volStr := volDesc.(string)
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paths := strings.Split(volStr, ":")
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@ -167,6 +168,7 @@ func (d *LxcDriver) Validate(config map[string]interface{}) error {
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return fmt.Errorf("unsupported absolute container mount point: '%s'", paths[1])
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}
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}
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}
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return nil
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}
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@ -371,7 +373,7 @@ func (d *LxcDriver) Open(ctx *ExecContext, handleID string) (DriverHandle, error
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containers := lxc.Containers(pid.LxcPath)
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for _, c := range containers {
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if c.Name() == pid.ContainerName {
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container = &c
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container = c
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break
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}
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}
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@ -0,0 +1,513 @@
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//+build linux,lxc
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package lxc
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import (
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"context"
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"fmt"
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"strconv"
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"time"
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hclog "github.com/hashicorp/go-hclog"
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"github.com/hashicorp/nomad/client/stats"
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cstructs "github.com/hashicorp/nomad/client/structs"
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"github.com/hashicorp/nomad/drivers/shared/eventer"
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"github.com/hashicorp/nomad/plugins/base"
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"github.com/hashicorp/nomad/plugins/drivers"
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"github.com/hashicorp/nomad/plugins/shared/hclspec"
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"github.com/hashicorp/nomad/plugins/shared/loader"
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lxc "gopkg.in/lxc/go-lxc.v2"
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)
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const (
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// pluginName is the name of the plugin
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pluginName = "lxc"
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// fingerprintPeriod is the interval at which the driver will send fingerprint responses
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fingerprintPeriod = 30 * time.Second
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)
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var (
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// PluginID is the rawexec plugin metadata registered in the plugin
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// catalog.
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PluginID = loader.PluginID{
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Name: pluginName,
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PluginType: base.PluginTypeDriver,
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}
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// PluginConfig is the rawexec factory function registered in the
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// plugin catalog.
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PluginConfig = &loader.InternalPluginConfig{
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Config: map[string]interface{}{},
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Factory: func(l hclog.Logger) interface{} { return NewLXCDriver(l) },
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}
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)
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// PluginLoader maps pre-0.9 client driver options to post-0.9 plugin options.
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func PluginLoader(opts map[string]string) (map[string]interface{}, error) {
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conf := map[string]interface{}{}
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if v, err := strconv.ParseBool(opts["driver.lxc.enable"]); err == nil {
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conf["enabled"] = v
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}
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if v, err := strconv.ParseBool(opts["lxc.volumes.enabled"]); err == nil {
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conf["volumes"] = v
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}
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if v, ok := opts["driver.lxc.path"]; ok {
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conf["path"] = v
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}
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return conf, nil
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}
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var (
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// pluginInfo is the response returned for the PluginInfo RPC
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pluginInfo = &base.PluginInfoResponse{
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Type: base.PluginTypeDriver,
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PluginApiVersion: "0.0.1",
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PluginVersion: "0.1.0",
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Name: pluginName,
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}
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// configSpec is the hcl specification returned by the ConfigSchema RPC
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configSpec = hclspec.NewObject(map[string]*hclspec.Spec{
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"enabled": hclspec.NewDefault(
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hclspec.NewAttr("enabled", "bool", false),
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hclspec.NewLiteral("true"),
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),
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"volumes": hclspec.NewDefault(
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hclspec.NewAttr("volumes", "bool", false),
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hclspec.NewLiteral("true"),
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),
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"path": hclspec.NewDefault(
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hclspec.NewAttr("path", "string", false),
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hclspec.NewLiteral("\"\""),
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),
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})
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// taskConfigSpec is the hcl specification for the driver config section of
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// a task within a job. It is returned in the TaskConfigSchema RPC
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taskConfigSpec = hclspec.NewObject(map[string]*hclspec.Spec{
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"template": hclspec.NewAttr("template", "string", true),
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"distro": hclspec.NewAttr("distro", "string", false),
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"release": hclspec.NewAttr("release", "string", false),
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"arch": hclspec.NewAttr("arch", "string", false),
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"image_variant": hclspec.NewAttr("image_variant", "string", false),
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"image_server": hclspec.NewAttr("image_server", "string", false),
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"gpg_key_id": hclspec.NewAttr("gpg_key_id", "string", false),
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"gpg_key_server": hclspec.NewAttr("gpg_key_server", "string", false),
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"disable_gpg": hclspec.NewAttr("disable_gpg", "string", false),
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"flush_cache": hclspec.NewAttr("flush_cache", "string", false),
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"force_cache": hclspec.NewAttr("force_cache", "string", false),
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"template_args": hclspec.NewAttr("template_args", "list(string)", false),
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"log_level": hclspec.NewAttr("log_level", "string", false),
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"verbosity": hclspec.NewAttr("verbosity", "string", false),
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"volumes": hclspec.NewAttr("volumes", "list(string)", false),
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})
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// capabilities is returned by the Capabilities RPC and indicates what
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// optional features this driver supports
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capabilities = &drivers.Capabilities{
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SendSignals: false,
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Exec: false,
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FSIsolation: cstructs.FSIsolationImage,
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}
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)
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// Driver is a driver for running LXC containers
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type Driver struct {
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// eventer is used to handle multiplexing of TaskEvents calls such that an
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// event can be broadcast to all callers
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eventer *eventer.Eventer
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// config is the driver configuration set by the SetConfig RPC
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config *Config
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// nomadConfig is the client config from nomad
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nomadConfig *base.ClientDriverConfig
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// tasks is the in memory datastore mapping taskIDs to rawExecDriverHandles
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tasks *taskStore
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// ctx is the context for the driver. It is passed to other subsystems to
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// coordinate shutdown
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ctx context.Context
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// signalShutdown is called when the driver is shutting down and cancels the
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// ctx passed to any subsystems
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signalShutdown context.CancelFunc
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// logger will log to the Nomad agent
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logger hclog.Logger
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}
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// Config is the driver configuration set by the SetConfig RPC call
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type Config struct {
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// Enabled is set to true to enable the lxc driver
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Enabled bool `codec:"enabled"`
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AllowVolumes bool `codec:"volumes"`
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Path string `codec:"path"`
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}
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// TaskConfig is the driver configuration of a task within a job
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type TaskConfig struct {
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Template string `codec:"template"`
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Distro string `codec:"distro"`
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Release string `codec:"release"`
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Arch string `codec:"arch"`
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ImageVariant string `codec:"image_variant"`
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ImageServer string `codec:"image_server"`
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GPGKeyID string `codec:"gpg_key_id"`
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GPGKeyServer string `codec:"gpg_key_server"`
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DisableGPGValidation bool `codec:"disable_gpg"`
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FlushCache bool `codec:"flush_cache"`
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ForceCache bool `codec:"force_cache"`
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TemplateArgs []string `codec:"template_args"`
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LogLevel string `codec:"log_level"`
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Verbosity string `codec:"verbosity"`
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Volumes []string `codec:"volumes"`
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}
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// TaskState is the state which is encoded in the handle returned in
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// StartTask. This information is needed to rebuild the task state and handler
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// during recovery.
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type TaskState struct {
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TaskConfig *drivers.TaskConfig
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ContainerName string
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StartedAt time.Time
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}
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// NewLXCDriver returns a new DriverPlugin implementation
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func NewLXCDriver(logger hclog.Logger) drivers.DriverPlugin {
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ctx, cancel := context.WithCancel(context.Background())
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logger = logger.Named(pluginName)
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return &Driver{
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eventer: eventer.NewEventer(ctx, logger),
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config: &Config{},
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tasks: newTaskStore(),
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ctx: ctx,
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signalShutdown: cancel,
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logger: logger,
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}
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}
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func (d *Driver) PluginInfo() (*base.PluginInfoResponse, error) {
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return pluginInfo, nil
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}
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func (d *Driver) ConfigSchema() (*hclspec.Spec, error) {
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return configSpec, nil
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}
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func (d *Driver) SetConfig(data []byte, cfg *base.ClientAgentConfig) error {
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var config Config
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if err := base.MsgPackDecode(data, &config); err != nil {
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return err
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}
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d.config = &config
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if cfg != nil {
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d.nomadConfig = cfg.Driver
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}
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return nil
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}
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func (d *Driver) Shutdown(ctx context.Context) error {
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d.signalShutdown()
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return nil
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}
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func (d *Driver) TaskConfigSchema() (*hclspec.Spec, error) {
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return taskConfigSpec, nil
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}
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func (d *Driver) Capabilities() (*drivers.Capabilities, error) {
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return capabilities, nil
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}
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func (d *Driver) Fingerprint(ctx context.Context) (<-chan *drivers.Fingerprint, error) {
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ch := make(chan *drivers.Fingerprint)
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go d.handleFingerprint(ctx, ch)
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return ch, nil
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}
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func (d *Driver) handleFingerprint(ctx context.Context, ch chan<- *drivers.Fingerprint) {
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defer close(ch)
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ticker := time.NewTimer(0)
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for {
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select {
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case <-ctx.Done():
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return
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case <-d.ctx.Done():
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return
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case <-ticker.C:
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ticker.Reset(fingerprintPeriod)
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ch <- d.buildFingerprint()
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}
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}
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}
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func (d *Driver) buildFingerprint() *drivers.Fingerprint {
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var health drivers.HealthState
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var desc string
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attrs := map[string]string{}
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lxcVersion := lxc.Version()
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if d.config.Enabled && lxcVersion != "" {
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health = drivers.HealthStateHealthy
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desc = "ready"
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attrs["driver.lxc"] = "1"
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attrs["driver.lxc.version"] = lxcVersion
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} else {
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health = drivers.HealthStateUndetected
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desc = "disabled"
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}
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if d.config.AllowVolumes {
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attrs["driver.lxc.volumes.enabled"] = "1"
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}
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return &drivers.Fingerprint{
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Attributes: attrs,
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Health: health,
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HealthDescription: desc,
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}
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}
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func (d *Driver) RecoverTask(handle *drivers.TaskHandle) error {
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if handle == nil {
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return fmt.Errorf("error: handle cannot be nil")
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}
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if _, ok := d.tasks.Get(handle.Config.ID); ok {
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return nil
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}
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var taskState TaskState
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if err := handle.GetDriverState(&taskState); err != nil {
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return fmt.Errorf("failed to decode task state from handle: %v", err)
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}
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var driverConfig TaskConfig
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if err := taskState.TaskConfig.DecodeDriverConfig(&driverConfig); err != nil {
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return fmt.Errorf("failed to decode driver config: %v", err)
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}
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c, err := lxc.NewContainer(taskState.ContainerName, d.lxcPath())
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if err != nil {
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return fmt.Errorf("failed to create container ref: %v", err)
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}
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initPid := c.InitPid()
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h := &taskHandle{
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container: c,
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initPid: initPid,
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taskConfig: taskState.TaskConfig,
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procState: drivers.TaskStateRunning,
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startedAt: taskState.StartedAt,
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exitResult: &drivers.ExitResult{},
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totalCpuStats: stats.NewCpuStats(),
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userCpuStats: stats.NewCpuStats(),
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systemCpuStats: stats.NewCpuStats(),
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}
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d.tasks.Set(taskState.TaskConfig.ID, h)
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go h.run()
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return nil
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}
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func (d *Driver) StartTask(cfg *drivers.TaskConfig) (*drivers.TaskHandle, *cstructs.DriverNetwork, error) {
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if _, ok := d.tasks.Get(cfg.ID); ok {
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return nil, nil, fmt.Errorf("task with ID %q already started", cfg.ID)
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}
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var driverConfig TaskConfig
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if err := cfg.DecodeDriverConfig(&driverConfig); err != nil {
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return nil, nil, fmt.Errorf("failed to decode driver config: %v", err)
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}
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d.logger.Info("starting lxc task", "driver_cfg", hclog.Fmt("%+v", driverConfig))
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handle := drivers.NewTaskHandle(pluginName)
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handle.Config = cfg
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c, err := d.initializeContainer(cfg, driverConfig)
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if err != nil {
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return nil, nil, err
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}
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opt := toLXCCreateOptions(driverConfig)
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if err := c.Create(opt); err != nil {
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return nil, nil, fmt.Errorf("unable to create container: %v", err)
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}
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cleanup := func() {
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if err := c.Destroy(); err != nil {
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d.logger.Error("failed to clean up from an error in Start", "error", err)
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}
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}
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if err := d.configureContainerNetwork(c); err != nil {
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cleanup()
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return nil, nil, err
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}
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if err := d.mountVolumes(c, cfg, driverConfig); err != nil {
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cleanup()
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return nil, nil, err
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}
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|
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if err := c.Start(); err != nil {
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cleanup()
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return nil, nil, fmt.Errorf("unable to start container: %v", err)
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}
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if err := d.setResourceLimits(c, cfg); err != nil {
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cleanup()
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return nil, nil, err
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}
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pid := c.InitPid()
|
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|
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h := &taskHandle{
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container: c,
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initPid: pid,
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taskConfig: cfg,
|
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procState: drivers.TaskStateRunning,
|
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startedAt: time.Now().Round(time.Millisecond),
|
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logger: d.logger,
|
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|
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totalCpuStats: stats.NewCpuStats(),
|
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userCpuStats: stats.NewCpuStats(),
|
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systemCpuStats: stats.NewCpuStats(),
|
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}
|
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|
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driverState := TaskState{
|
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ContainerName: c.Name(),
|
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TaskConfig: cfg,
|
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StartedAt: h.startedAt,
|
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}
|
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|
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if err := handle.SetDriverState(&driverState); err != nil {
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d.logger.Error("failed to start task, error setting driver state", "error", err)
|
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cleanup()
|
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return nil, nil, fmt.Errorf("failed to set driver state: %v", err)
|
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}
|
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|
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d.tasks.Set(cfg.ID, h)
|
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|
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go h.run()
|
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|
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return handle, nil, nil
|
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}
|
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|
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func (d *Driver) WaitTask(ctx context.Context, taskID string) (<-chan *drivers.ExitResult, error) {
|
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handle, ok := d.tasks.Get(taskID)
|
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if !ok {
|
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return nil, drivers.ErrTaskNotFound
|
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}
|
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|
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ch := make(chan *drivers.ExitResult)
|
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go d.handleWait(ctx, handle, ch)
|
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|
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return ch, nil
|
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}
|
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|
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func (d *Driver) handleWait(ctx context.Context, handle *taskHandle, ch chan *drivers.ExitResult) {
|
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defer close(ch)
|
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|
||||
//
|
||||
// Wait for process completion by polling status from handler.
|
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// We cannot use the following alternatives:
|
||||
// * Process.Wait() requires LXC container processes to be children
|
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// of self process; but LXC runs container in separate PID hierarchy
|
||||
// owned by PID 1.
|
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// * lxc.Container.Wait() holds a write lock on container and prevents
|
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// any other calls, including stats.
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//
|
||||
// Going with simplest approach of polling for handler to mark exit.
|
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ticker := time.NewTicker(2 * time.Second)
|
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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) (*cstructs.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")
|
||||
}
|
||||
|
|
@ -0,0 +1,271 @@
|
|||
// +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"
|
||||
"github.com/hashicorp/nomad/plugins/shared"
|
||||
"github.com/hashicorp/nomad/plugins/shared/hclspec"
|
||||
"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 := drivers.NewDriverHarness(t, d)
|
||||
|
||||
fingerCh, err := harness.Fingerprint(context.Background())
|
||||
require.NoError(err)
|
||||
select {
|
||||
case finger := <-fingerCh:
|
||||
require.Equal(drivers.HealthStateHealthy, finger.Health)
|
||||
require.Equal("1", finger.Attributes["driver.lxc"])
|
||||
require.NotEmpty(finger.Attributes["driver.lxc.version"])
|
||||
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 := drivers.NewDriverHarness(t, d)
|
||||
|
||||
fingerCh, err := harness.Fingerprint(context.Background())
|
||||
require.NoError(err)
|
||||
select {
|
||||
case finger := <-fingerCh:
|
||||
require.Equal(drivers.HealthStateUndetected, finger.Health)
|
||||
require.Equal("", 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 := drivers.NewDriverHarness(t, d)
|
||||
task := &drivers.TaskConfig{
|
||||
ID: uuid.Generate(),
|
||||
Name: "test",
|
||||
Resources: &drivers.Resources{
|
||||
NomadResources: &structs.Resources{
|
||||
CPU: 1,
|
||||
MemoryMB: 2,
|
||||
},
|
||||
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 := drivers.NewDriverHarness(t, d)
|
||||
task := &drivers.TaskConfig{
|
||||
ID: uuid.Generate(),
|
||||
Name: "test",
|
||||
Resources: &drivers.Resources{
|
||||
NomadResources: &structs.Resources{
|
||||
CPU: 1,
|
||||
MemoryMB: 2,
|
||||
},
|
||||
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: shared.GetStdlibFuncs(),
|
||||
}
|
||||
spec, diag := hclspec.Convert(taskConfigSpec)
|
||||
require.False(diag.HasErrors())
|
||||
taskConfigCtyVal, diag := shared.ParseHclInterface(taskConfig, spec, evalCtx)
|
||||
require.False(diag.HasErrors())
|
||||
err := task.EncodeDriverConfig(taskConfigCtyVal)
|
||||
require.Nil(err)
|
||||
}
|
||||
|
|
@ -0,0 +1,200 @@
|
|||
//+build linux,lxc
|
||||
|
||||
package lxc
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"strconv"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
hclog "github.com/hashicorp/go-hclog"
|
||||
"github.com/hashicorp/nomad/client/stats"
|
||||
cstructs "github.com/hashicorp/nomad/client/structs"
|
||||
"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() (*cstructs.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 := &cstructs.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 := &cstructs.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 := cstructs.TaskResourceUsage{
|
||||
ResourceUsage: &cstructs.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()
|
||||
}
|
||||
|
|
@ -0,0 +1,170 @@
|
|||
//+build linux,lxc
|
||||
|
||||
package lxc
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"strings"
|
||||
"syscall"
|
||||
"time"
|
||||
|
||||
"github.com/hashicorp/nomad/plugins/drivers"
|
||||
lxc "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 {
|
||||
// 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),
|
||||
}
|
||||
|
||||
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 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])
|
||||
}
|
||||
|
||||
mounts = append(mounts, fmt.Sprintf("%s %s none rw,bind,create=dir", paths[0], paths[1]))
|
||||
}
|
||||
|
||||
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)
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (d *Driver) setResourceLimits(c *lxc.Container, cfg *drivers.TaskConfig) error {
|
||||
if err := c.SetMemoryLimit(lxc.ByteSize(cfg.Resources.NomadResources.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)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,35 @@
|
|||
//+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)
|
||||
}
|
||||
|
|
@ -0,0 +1,14 @@
|
|||
//+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)
|
||||
}
|
||||
|
|
@ -45,4 +45,16 @@ escape-analysis:
|
|||
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
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load Diff
|
|
@ -16,6 +16,7 @@ var (
|
|||
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")
|
||||
|
|
|
|||
|
|
@ -15,10 +15,9 @@
|
|||
|
||||
#include "lxc-binding.h"
|
||||
|
||||
#define VERSION_AT_LEAST(major, minor, micro) \
|
||||
(!(major > LXC_VERSION_MAJOR || \
|
||||
major == LXC_VERSION_MAJOR && minor > LXC_VERSION_MINOR || \
|
||||
major == LXC_VERSION_MAJOR && minor == LXC_VERSION_MINOR && micro > LXC_VERSION_MICRO))
|
||||
#ifndef LXC_DEVEL
|
||||
#define LXC_DEVEL 0
|
||||
#endif
|
||||
|
||||
bool go_lxc_defined(struct lxc_container *c) {
|
||||
return c->is_defined(c);
|
||||
|
|
@ -92,16 +91,24 @@ 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 *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) {
|
||||
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;
|
||||
}
|
||||
|
||||
char* value = (char*)malloc(sizeof(char)*len + 1);
|
||||
if (c->get_config_item(c, key, value, len + 1) != len) {
|
||||
return NULL;
|
||||
}
|
||||
return value;
|
||||
}
|
||||
|
||||
|
|
@ -121,29 +128,45 @@ 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 *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) {
|
||||
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;
|
||||
}
|
||||
|
||||
char* value = (char*)malloc(sizeof(char)*len + 1);
|
||||
if (c->get_keys(c, key, value, len + 1) != len) {
|
||||
return NULL;
|
||||
}
|
||||
return value;
|
||||
}
|
||||
|
||||
char* go_lxc_get_cgroup_item(struct lxc_container *c, const char *key) {
|
||||
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) {
|
||||
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;
|
||||
}
|
||||
|
||||
char* value = (char*)malloc(sizeof(char)*len + 1);
|
||||
if (c->get_cgroup_item(c, key, value, len + 1) != len) {
|
||||
return NULL;
|
||||
}
|
||||
return value;
|
||||
}
|
||||
|
||||
|
|
@ -173,10 +196,12 @@ bool go_lxc_clone(struct lxc_container *c, const char *newname, const char *lxcp
|
|||
|
||||
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;
|
||||
|
||||
if (c->console_getfd(c, &ttynum, &masterfd) < 0) {
|
||||
return -1;
|
||||
}
|
||||
return masterfd;
|
||||
}
|
||||
|
||||
|
|
@ -212,6 +237,51 @@ 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,
|
||||
|
|
@ -257,16 +327,16 @@ int go_lxc_attach(struct lxc_container *c,
|
|||
|
||||
ret = c->attach(c, lxc_attach_run_shell, NULL, &attach_options, &pid);
|
||||
if (ret < 0)
|
||||
return -1;
|
||||
return ret;
|
||||
|
||||
ret = wait_for_pid_status(pid);
|
||||
if (ret < 0)
|
||||
return -1;
|
||||
return ret;
|
||||
|
||||
if (WIFEXITED(ret))
|
||||
return WEXITSTATUS(ret);
|
||||
|
||||
return -1;
|
||||
return ret;
|
||||
}
|
||||
|
||||
int go_lxc_attach_run_wait(struct lxc_container *c,
|
||||
|
|
@ -366,6 +436,9 @@ bool go_lxc_restore(struct lxc_container *c, char *directory, bool verbose) {
|
|||
}
|
||||
|
||||
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;
|
||||
|
|
@ -397,3 +470,34 @@ bool go_lxc_detach_interface(struct lxc_container *c, const char *dev, const cha
|
|||
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
|
||||
}
|
||||
|
|
|
|||
|
|
@ -11,10 +11,16 @@ package lxc
|
|||
// #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"
|
||||
)
|
||||
|
||||
|
|
@ -54,12 +60,22 @@ 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 {
|
||||
return C.GoString(C.lxc_get_version())
|
||||
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.
|
||||
|
|
@ -108,12 +124,12 @@ func ContainerNames(lxcpath ...string) []string {
|
|||
|
||||
// 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
|
||||
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)
|
||||
containers = append(containers, container)
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -143,12 +159,12 @@ func DefinedContainerNames(lxcpath ...string) []string {
|
|||
|
||||
// DefinedContainers returns the defined containers on the system. Only
|
||||
// containers that could retrieved successfully are returned.
|
||||
func DefinedContainers(lxcpath ...string) []Container {
|
||||
var containers []Container
|
||||
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)
|
||||
containers = append(containers, container)
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -178,18 +194,19 @@ func ActiveContainerNames(lxcpath ...string) []string {
|
|||
|
||||
// ActiveContainers returns the active containers on the system. Only
|
||||
// containers that could retrieved successfully are returned.
|
||||
func ActiveContainers(lxcpath ...string) []Container {
|
||||
var containers []Container
|
||||
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)
|
||||
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
|
||||
|
|
@ -197,7 +214,12 @@ func VersionNumber() (major int, minor int) {
|
|||
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
|
||||
}
|
||||
|
|
@ -215,3 +237,90 @@ func VersionAtLeast(major int, minor int, micro int) bool {
|
|||
|
||||
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
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,6 +2,11 @@
|
|||
// 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);
|
||||
|
|
@ -60,19 +65,32 @@ extern int go_lxc_attach(struct lxc_container *c,
|
|||
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 LXC_VERSION_MAJOR != 2
|
||||
#if !VERSION_AT_LEAST(2, 0, 0)
|
||||
struct migrate_opts {
|
||||
char *directory;
|
||||
bool verbose;
|
||||
|
|
@ -89,8 +107,21 @@ 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);
|
||||
|
|
|
|||
|
|
@ -142,7 +142,7 @@ type ConsoleOptions struct {
|
|||
EscapeCharacter rune
|
||||
}
|
||||
|
||||
// DefailtConsoleOptions is a convenient set of options to be used.
|
||||
// DefaultConsoleOptions is a convenient set of options to be used.
|
||||
var DefaultConsoleOptions = ConsoleOptions{
|
||||
Tty: -1,
|
||||
StdinFd: os.Stdin.Fd(),
|
||||
|
|
@ -175,25 +175,35 @@ var DefaultCloneOptions = CloneOptions{
|
|||
Backend: Directory,
|
||||
}
|
||||
|
||||
// CheckpointOptions type is used for defining checkpoint options for CRIU
|
||||
// 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
|
||||
// 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
|
||||
PredumpDir string
|
||||
PreservesInodes bool
|
||||
ActionScript string
|
||||
GhostLimit uint64
|
||||
FeaturesToCheck CriuFeatures
|
||||
}
|
||||
|
||||
// ConsoleLogOptioins type is used for defining console log options.
|
||||
type ConsoleLogOptions struct {
|
||||
ClearLog bool
|
||||
ReadLog bool
|
||||
ReadMax uint64
|
||||
WriteToLogFile bool
|
||||
}
|
||||
|
|
|
|||
|
|
@ -263,4 +263,12 @@ 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
|
||||
)
|
||||
|
|
|
|||
|
|
@ -12,7 +12,7 @@ package lxc
|
|||
|
||||
static char** makeCharArray(size_t size) {
|
||||
// caller checks return value
|
||||
return calloc(sizeof(char*), size);
|
||||
return calloc(size, sizeof(char*));
|
||||
}
|
||||
|
||||
static void setArrayString(char **array, char *string, size_t n) {
|
||||
|
|
|
|||
|
|
@ -434,7 +434,7 @@
|
|||
{"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/inf.v0","checksumSHA1":"6f8MEU31llHM1sLM/GGH4/Qxu0A=","revision":"3887ee99ecf07df5b447e9b00d9c0b2adaa9f3e4","revisionTime":"2015-09-11T12:57:57Z"},
|
||||
{"path":"gopkg.in/lxc/go-lxc.v2","checksumSHA1":"i97goLq3AIfUNB8l1hxGGMSW0+s=","revision":"f8a6938e600c634232eeef79dc04a1226f73a88b","revisionTime":"2016-08-03T16:52:18Z"},
|
||||
{"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.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"}
|
||||
|
|
|
|||
Loading…
Reference in New Issue