625 lines
17 KiB
Go
625 lines
17 KiB
Go
package exec
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import (
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"bytes"
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"context"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/hashicorp/hcl2/hcl"
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ctestutils "github.com/hashicorp/nomad/client/testutil"
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"github.com/hashicorp/nomad/helper/testlog"
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"github.com/hashicorp/nomad/helper/testtask"
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"github.com/hashicorp/nomad/helper/uuid"
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"github.com/hashicorp/nomad/nomad/structs"
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"github.com/hashicorp/nomad/plugins/drivers"
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dtestutil "github.com/hashicorp/nomad/plugins/drivers/testutils"
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"github.com/hashicorp/nomad/plugins/shared/hclspec"
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"github.com/hashicorp/nomad/plugins/shared/hclutils"
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"github.com/hashicorp/nomad/testutil"
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"github.com/stretchr/testify/require"
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"golang.org/x/sys/unix"
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)
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func TestMain(m *testing.M) {
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if !testtask.Run() {
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os.Exit(m.Run())
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}
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}
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var testResources = &drivers.Resources{
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NomadResources: &structs.AllocatedTaskResources{
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Memory: structs.AllocatedMemoryResources{
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MemoryMB: 128,
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},
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Cpu: structs.AllocatedCpuResources{
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CpuShares: 100,
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},
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},
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LinuxResources: &drivers.LinuxResources{
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MemoryLimitBytes: 134217728,
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CPUShares: 100,
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},
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}
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func TestExecDriver_Fingerprint_NonLinux(t *testing.T) {
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if !testutil.IsTravis() {
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t.Parallel()
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}
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require := require.New(t)
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if runtime.GOOS == "linux" {
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t.Skip("Test only available not on Linux")
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}
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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fingerCh, err := harness.Fingerprint(context.Background())
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require.NoError(err)
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select {
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case finger := <-fingerCh:
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require.Equal(drivers.HealthStateUndetected, finger.Health)
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case <-time.After(time.Duration(testutil.TestMultiplier()*5) * time.Second):
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require.Fail("timeout receiving fingerprint")
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}
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}
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func TestExecDriver_Fingerprint(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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fingerCh, err := harness.Fingerprint(context.Background())
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require.NoError(err)
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select {
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case finger := <-fingerCh:
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require.Equal(drivers.HealthStateHealthy, finger.Health)
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require.True(finger.Attributes["driver.exec"].GetBool())
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case <-time.After(time.Duration(testutil.TestMultiplier()*5) * time.Second):
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require.Fail("timeout receiving fingerprint")
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}
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}
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func TestExecDriver_StartWait(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "test",
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Resources: testResources,
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}
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taskConfig := map[string]interface{}{
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"command": "cat",
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"args": []string{"/proc/self/cgroup"},
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}
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encodeDriverHelper(require, task, taskConfig)
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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handle, _, err := harness.StartTask(task)
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require.NoError(err)
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ch, err := harness.WaitTask(context.Background(), handle.Config.ID)
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require.NoError(err)
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result := <-ch
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require.Zero(result.ExitCode)
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require.NoError(harness.DestroyTask(task.ID, true))
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}
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func TestExecDriver_StartWaitStop(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "test",
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Resources: testResources,
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}
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taskConfig := map[string]interface{}{
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"command": "/bin/sleep",
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"args": []string{"600"},
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}
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encodeDriverHelper(require, task, taskConfig)
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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handle, _, err := harness.StartTask(task)
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require.NoError(err)
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ch, err := harness.WaitTask(context.Background(), handle.Config.ID)
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require.NoError(err)
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require.NoError(harness.WaitUntilStarted(task.ID, 1*time.Second))
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go func() {
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harness.StopTask(task.ID, 2*time.Second, "SIGINT")
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}()
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select {
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case result := <-ch:
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require.Equal(int(unix.SIGINT), result.Signal)
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case <-time.After(10 * time.Second):
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require.Fail("timeout waiting for task to shutdown")
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}
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// Ensure that the task is marked as dead, but account
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// for WaitTask() closing channel before internal state is updated
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testutil.WaitForResult(func() (bool, error) {
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status, err := harness.InspectTask(task.ID)
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if err != nil {
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return false, fmt.Errorf("inspecting task failed: %v", err)
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}
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if status.State != drivers.TaskStateExited {
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return false, fmt.Errorf("task hasn't exited yet; status: %v", status.State)
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}
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return true, nil
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}, func(err error) {
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require.NoError(err)
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})
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require.NoError(harness.DestroyTask(task.ID, true))
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}
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func TestExecDriver_StartWaitStopKill(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "test",
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Resources: testResources,
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}
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taskConfig := map[string]interface{}{
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"command": "/bin/bash",
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"args": []string{"-c", "echo hi; sleep 600"},
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}
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encodeDriverHelper(require, task, taskConfig)
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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handle, _, err := harness.StartTask(task)
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require.NoError(err)
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defer harness.DestroyTask(task.ID, true)
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ch, err := harness.WaitTask(context.Background(), handle.Config.ID)
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require.NoError(err)
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require.NoError(harness.WaitUntilStarted(task.ID, 1*time.Second))
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go func() {
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harness.StopTask(task.ID, 2*time.Second, "SIGINT")
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}()
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select {
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case result := <-ch:
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require.False(result.Successful())
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case <-time.After(10 * time.Second):
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require.Fail("timeout waiting for task to shutdown")
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}
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// Ensure that the task is marked as dead, but account
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// for WaitTask() closing channel before internal state is updated
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testutil.WaitForResult(func() (bool, error) {
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status, err := harness.InspectTask(task.ID)
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if err != nil {
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return false, fmt.Errorf("inspecting task failed: %v", err)
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}
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if status.State != drivers.TaskStateExited {
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return false, fmt.Errorf("task hasn't exited yet; status: %v", status.State)
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}
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return true, nil
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}, func(err error) {
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require.NoError(err)
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})
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require.NoError(harness.DestroyTask(task.ID, true))
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}
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func TestExecDriver_StartWaitRecover(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "test",
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Resources: testResources,
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}
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taskConfig := map[string]interface{}{
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"command": "/bin/sleep",
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"args": []string{"5"},
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}
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encodeDriverHelper(require, task, taskConfig)
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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handle, _, err := harness.StartTask(task)
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require.NoError(err)
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ctx, cancel := context.WithCancel(context.Background())
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ch, err := harness.WaitTask(ctx, handle.Config.ID)
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require.NoError(err)
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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result := <-ch
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require.Error(result.Err)
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}()
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require.NoError(harness.WaitUntilStarted(task.ID, 1*time.Second))
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cancel()
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waitCh := make(chan struct{})
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go func() {
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defer close(waitCh)
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wg.Wait()
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}()
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select {
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case <-waitCh:
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status, err := harness.InspectTask(task.ID)
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require.NoError(err)
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require.Equal(drivers.TaskStateRunning, status.State)
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case <-time.After(1 * time.Second):
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require.Fail("timeout waiting for task wait to cancel")
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}
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// Loose task
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d.(*Driver).tasks.Delete(task.ID)
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_, err = harness.InspectTask(task.ID)
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require.Error(err)
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require.NoError(harness.RecoverTask(handle))
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status, err := harness.InspectTask(task.ID)
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require.NoError(err)
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require.Equal(drivers.TaskStateRunning, status.State)
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require.NoError(harness.StopTask(task.ID, 0, ""))
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require.NoError(harness.DestroyTask(task.ID, true))
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}
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func TestExecDriver_Stats(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "test",
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Resources: testResources,
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}
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taskConfig := map[string]interface{}{
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"command": "/bin/sleep",
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"args": []string{"5"},
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}
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encodeDriverHelper(require, task, taskConfig)
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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handle, _, err := harness.StartTask(task)
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require.NoError(err)
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require.NotNil(handle)
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require.NoError(harness.WaitUntilStarted(task.ID, 1*time.Second))
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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statsCh, err := harness.TaskStats(ctx, task.ID, time.Second*10)
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require.NoError(err)
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select {
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case stats := <-statsCh:
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require.NotZero(stats.ResourceUsage.MemoryStats.RSS)
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case <-time.After(time.Second):
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require.Fail("timeout receiving from channel")
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}
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require.NoError(harness.DestroyTask(task.ID, true))
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}
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func TestExecDriver_Start_Wait_AllocDir(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "sleep",
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Resources: testResources,
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}
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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exp := []byte{'w', 'i', 'n'}
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file := "output.txt"
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taskConfig := map[string]interface{}{
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"command": "/bin/bash",
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"args": []string{
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"-c",
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fmt.Sprintf(`sleep 1; echo -n %s > /alloc/%s`, string(exp), file),
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},
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}
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encodeDriverHelper(require, task, taskConfig)
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handle, _, err := harness.StartTask(task)
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require.NoError(err)
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require.NotNil(handle)
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// Task should terminate quickly
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waitCh, err := harness.WaitTask(context.Background(), task.ID)
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require.NoError(err)
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select {
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case res := <-waitCh:
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require.True(res.Successful(), "task should have exited successfully: %v", res)
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case <-time.After(time.Duration(testutil.TestMultiplier()*5) * time.Second):
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require.Fail("timeout waiting for task")
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}
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// Check that data was written to the shared alloc directory.
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outputFile := filepath.Join(task.TaskDir().SharedAllocDir, file)
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act, err := ioutil.ReadFile(outputFile)
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require.NoError(err)
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require.Exactly(exp, act)
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require.NoError(harness.DestroyTask(task.ID, true))
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}
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func TestExecDriver_User(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "sleep",
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User: "alice",
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Resources: testResources,
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}
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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taskConfig := map[string]interface{}{
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"command": "/bin/sleep",
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"args": []string{"100"},
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}
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encodeDriverHelper(require, task, taskConfig)
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handle, _, err := harness.StartTask(task)
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require.Error(err)
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require.Nil(handle)
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msg := "user alice"
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if !strings.Contains(err.Error(), msg) {
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t.Fatalf("Expecting '%v' in '%v'", msg, err)
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}
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}
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// TestExecDriver_HandlerExec ensures the exec driver's handle properly
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// executes commands inside the container.
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func TestExecDriver_HandlerExec(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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d := NewExecDriver(testlog.HCLogger(t))
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harness := dtestutil.NewDriverHarness(t, d)
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task := &drivers.TaskConfig{
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ID: uuid.Generate(),
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Name: "sleep",
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Resources: testResources,
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}
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cleanup := harness.MkAllocDir(task, false)
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defer cleanup()
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taskConfig := map[string]interface{}{
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"command": "/bin/sleep",
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"args": []string{"9000"},
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}
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encodeDriverHelper(require, task, taskConfig)
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handle, _, err := harness.StartTask(task)
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require.NoError(err)
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require.NotNil(handle)
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// Exec a command that should work and dump the environment
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// TODO: enable section when exec env is fully loaded
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/*res, err := harness.ExecTask(task.ID, []string{"/bin/sh", "-c", "env | grep ^NOMAD"}, time.Second)
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require.NoError(err)
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require.True(res.ExitResult.Successful())
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// Assert exec'd commands are run in a task-like environment
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scriptEnv := make(map[string]string)
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for _, line := range strings.Split(string(res.Stdout), "\n") {
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if line == "" {
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continue
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}
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parts := strings.SplitN(string(line), "=", 2)
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if len(parts) != 2 {
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t.Fatalf("Invalid env var: %q", line)
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}
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scriptEnv[parts[0]] = parts[1]
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}
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if v, ok := scriptEnv["NOMAD_SECRETS_DIR"]; !ok || v != "/secrets" {
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t.Errorf("Expected NOMAD_SECRETS_DIR=/secrets but found=%t value=%q", ok, v)
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}*/
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// Assert cgroup membership
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res, err := harness.ExecTask(task.ID, []string{"/bin/cat", "/proc/self/cgroup"}, time.Second)
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require.NoError(err)
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require.True(res.ExitResult.Successful())
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found := false
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for _, line := range strings.Split(string(res.Stdout), "\n") {
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// Every cgroup entry should be /nomad/$ALLOC_ID
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if line == "" {
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continue
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}
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// Skip systemd and rdma cgroups; rdma was added in most recent kernels and libcontainer/docker
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// don't isolate them by default.
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if strings.HasPrefix(line, "1:name=systemd") || strings.Contains(line, ":rdma:") {
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continue
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}
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if !strings.Contains(line, ":/nomad/") {
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t.Errorf("Not a member of the alloc's cgroup: expected=...:/nomad/... -- found=%q", line)
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continue
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}
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found = true
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}
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require.True(found, "exec'd command isn't in the task's cgroup")
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// Exec a command that should fail
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res, err = harness.ExecTask(task.ID, []string{"/usr/bin/stat", "lkjhdsaflkjshowaisxmcvnlia"}, time.Second)
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require.NoError(err)
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require.False(res.ExitResult.Successful())
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if expected := "No such file or directory"; !bytes.Contains(res.Stdout, []byte(expected)) {
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t.Fatalf("expected output to contain %q but found: %q", expected, res.Stdout)
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}
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require.NoError(harness.DestroyTask(task.ID, true))
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}
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func TestExecDriver_DevicesAndMounts(t *testing.T) {
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t.Parallel()
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require := require.New(t)
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ctestutils.ExecCompatible(t)
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|
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tmpDir, err := ioutil.TempDir("", "exec_binds_mounts")
|
|
require.NoError(err)
|
|
defer os.RemoveAll(tmpDir)
|
|
|
|
err = ioutil.WriteFile(filepath.Join(tmpDir, "testfile"), []byte("from-host"), 600)
|
|
require.NoError(err)
|
|
|
|
d := NewExecDriver(testlog.HCLogger(t))
|
|
harness := dtestutil.NewDriverHarness(t, d)
|
|
task := &drivers.TaskConfig{
|
|
ID: uuid.Generate(),
|
|
Name: "test",
|
|
Resources: testResources,
|
|
StdoutPath: filepath.Join(tmpDir, "task-stdout"),
|
|
StderrPath: filepath.Join(tmpDir, "task-stderr"),
|
|
Devices: []*drivers.DeviceConfig{
|
|
{
|
|
TaskPath: "/dev/inserted-random",
|
|
HostPath: "/dev/random",
|
|
Permissions: "rw",
|
|
},
|
|
},
|
|
Mounts: []*drivers.MountConfig{
|
|
{
|
|
TaskPath: "/tmp/task-path-rw",
|
|
HostPath: tmpDir,
|
|
Readonly: false,
|
|
},
|
|
{
|
|
TaskPath: "/tmp/task-path-ro",
|
|
HostPath: tmpDir,
|
|
Readonly: true,
|
|
},
|
|
},
|
|
}
|
|
|
|
require.NoError(ioutil.WriteFile(task.StdoutPath, []byte{}, 660))
|
|
require.NoError(ioutil.WriteFile(task.StderrPath, []byte{}, 660))
|
|
|
|
taskConfig := map[string]interface{}{
|
|
"command": "/bin/bash",
|
|
"args": []string{"-c", `
|
|
export LANG=en.UTF-8
|
|
echo "mounted device /inserted-random: $(stat -c '%t:%T' /dev/inserted-random)"
|
|
echo "reading from ro path: $(cat /tmp/task-path-ro/testfile)"
|
|
echo "reading from rw path: $(cat /tmp/task-path-rw/testfile)"
|
|
touch /tmp/task-path-rw/testfile && echo 'overwriting file in rw succeeded'
|
|
touch /tmp/task-path-rw/testfile-from-rw && echo from-exec > /tmp/task-path-rw/testfile-from-rw && echo 'writing new file in rw succeeded'
|
|
touch /tmp/task-path-ro/testfile && echo 'overwriting file in ro succeeded'
|
|
touch /tmp/task-path-ro/testfile-from-ro && echo from-exec > /tmp/task-path-ro/testfile-from-ro && echo 'writing new file in ro succeeded'
|
|
exit 0
|
|
`},
|
|
}
|
|
encodeDriverHelper(require, task, taskConfig)
|
|
|
|
cleanup := harness.MkAllocDir(task, false)
|
|
defer cleanup()
|
|
|
|
handle, _, err := harness.StartTask(task)
|
|
require.NoError(err)
|
|
|
|
ch, err := harness.WaitTask(context.Background(), handle.Config.ID)
|
|
require.NoError(err)
|
|
result := <-ch
|
|
require.NoError(harness.DestroyTask(task.ID, true))
|
|
|
|
stdout, err := ioutil.ReadFile(task.StdoutPath)
|
|
require.NoError(err)
|
|
require.Equal(`mounted device /inserted-random: 1:8
|
|
reading from ro path: from-host
|
|
reading from rw path: from-host
|
|
overwriting file in rw succeeded
|
|
writing new file in rw succeeded`, strings.TrimSpace(string(stdout)))
|
|
|
|
stderr, err := ioutil.ReadFile(task.StderrPath)
|
|
require.NoError(err)
|
|
require.Equal(`touch: cannot touch '/tmp/task-path-ro/testfile': Read-only file system
|
|
touch: cannot touch '/tmp/task-path-ro/testfile-from-ro': Read-only file system`, strings.TrimSpace(string(stderr)))
|
|
|
|
// testing exit code last so we can inspect output first
|
|
require.Zero(result.ExitCode)
|
|
|
|
fromRWContent, err := ioutil.ReadFile(filepath.Join(tmpDir, "testfile-from-rw"))
|
|
require.NoError(err)
|
|
require.Equal("from-exec", strings.TrimSpace(string(fromRWContent)))
|
|
}
|
|
|
|
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)
|
|
}
|