339 lines
8.7 KiB
Go
339 lines
8.7 KiB
Go
package executor
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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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"syscall"
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"testing"
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"time"
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hclog "github.com/hashicorp/go-hclog"
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"github.com/hashicorp/nomad/client/allocdir"
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"github.com/hashicorp/nomad/client/taskenv"
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"github.com/hashicorp/nomad/helper/testlog"
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"github.com/hashicorp/nomad/nomad/mock"
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"github.com/hashicorp/nomad/plugins/drivers"
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tu "github.com/hashicorp/nomad/testutil"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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var executorFactories = map[string]func(hclog.Logger) Executor{}
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var universalFactory = func(l hclog.Logger) Executor {
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return NewExecutor(l)
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}
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func init() {
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executorFactories["UniversalExecutor"] = universalFactory
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}
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// testExecutorContext returns an ExecutorContext and AllocDir.
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//
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// The caller is responsible for calling AllocDir.Destroy() to cleanup.
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func testExecutorCommand(t *testing.T) (*ExecCommand, *allocdir.AllocDir) {
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alloc := mock.Alloc()
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task := alloc.Job.TaskGroups[0].Tasks[0]
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taskEnv := taskenv.NewBuilder(mock.Node(), alloc, task, "global").Build()
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allocDir := allocdir.NewAllocDir(testlog.HCLogger(t), filepath.Join(os.TempDir(), alloc.ID))
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if err := allocDir.Build(); err != nil {
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t.Fatalf("AllocDir.Build() failed: %v", err)
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}
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if err := allocDir.NewTaskDir(task.Name).Build(false, nil); err != nil {
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allocDir.Destroy()
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t.Fatalf("allocDir.NewTaskDir(%q) failed: %v", task.Name, err)
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}
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td := allocDir.TaskDirs[task.Name]
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cmd := &ExecCommand{
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Env: taskEnv.List(),
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TaskDir: td.Dir,
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Resources: &drivers.Resources{
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NomadResources: alloc.AllocatedResources.Tasks[task.Name],
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},
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}
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setupRootfs(t, td.Dir)
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configureTLogging(cmd)
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return cmd, allocDir
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}
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type bufferCloser struct {
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bytes.Buffer
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}
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func (_ *bufferCloser) Close() error { return nil }
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func configureTLogging(cmd *ExecCommand) (stdout bufferCloser, stderr bufferCloser) {
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cmd.SetWriters(&stdout, &stderr)
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return
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}
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func TestExecutor_Start_Invalid(pt *testing.T) {
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pt.Parallel()
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invalid := "/bin/foobar"
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for name, factory := range executorFactories {
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pt.Run(name, func(t *testing.T) {
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require := require.New(t)
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execCmd, allocDir := testExecutorCommand(t)
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execCmd.Cmd = invalid
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execCmd.Args = []string{"1"}
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defer allocDir.Destroy()
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executor := factory(testlog.HCLogger(t))
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defer executor.Shutdown("", 0)
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_, err := executor.Launch(execCmd)
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require.Error(err)
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})
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}
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}
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func TestExecutor_Start_Wait_Failure_Code(pt *testing.T) {
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pt.Parallel()
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for name, factory := range executorFactories {
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pt.Run(name, func(t *testing.T) {
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require := require.New(t)
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execCmd, allocDir := testExecutorCommand(t)
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execCmd.Cmd = "/bin/date"
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execCmd.Args = []string{"fail"}
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defer allocDir.Destroy()
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executor := factory(testlog.HCLogger(t))
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defer executor.Shutdown("", 0)
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ps, err := executor.Launch(execCmd)
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require.NoError(err)
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require.NotZero(ps.Pid)
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ps, _ = executor.Wait(context.Background())
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require.NotZero(ps.ExitCode, "expected exit code to be non zero")
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require.NoError(executor.Shutdown("SIGINT", 100*time.Millisecond))
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})
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}
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}
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func TestExecutor_Start_Wait(pt *testing.T) {
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pt.Parallel()
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for name, factory := range executorFactories {
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pt.Run(name, func(t *testing.T) {
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require := require.New(t)
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execCmd, allocDir := testExecutorCommand(t)
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execCmd.Cmd = "/bin/echo"
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execCmd.Args = []string{"hello world"}
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defer allocDir.Destroy()
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executor := factory(testlog.HCLogger(t))
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defer executor.Shutdown("", 0)
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ps, err := executor.Launch(execCmd)
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require.NoError(err)
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require.NotZero(ps.Pid)
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ps, err = executor.Wait(context.Background())
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require.NoError(err)
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require.NoError(executor.Shutdown("SIGINT", 100*time.Millisecond))
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expected := "hello world"
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tu.WaitForResult(func() (bool, error) {
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outWriter, _ := execCmd.GetWriters()
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output := outWriter.(*bufferCloser).String()
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act := strings.TrimSpace(string(output))
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if expected != act {
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return false, fmt.Errorf("expected: '%s' actual: '%s'", expected, act)
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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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})
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}
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}
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func TestExecutor_WaitExitSignal(pt *testing.T) {
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pt.Parallel()
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for name, factory := range executorFactories {
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pt.Run(name, func(t *testing.T) {
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require := require.New(t)
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execCmd, allocDir := testExecutorCommand(t)
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execCmd.Cmd = "/bin/sleep"
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execCmd.Args = []string{"10000"}
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execCmd.ResourceLimits = true
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defer allocDir.Destroy()
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executor := factory(testlog.HCLogger(t))
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defer executor.Shutdown("", 0)
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ps, err := executor.Launch(execCmd)
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require.NoError(err)
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go func() {
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tu.WaitForResult(func() (bool, error) {
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ch, err := executor.Stats(context.Background(), time.Second)
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if err != nil {
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return false, err
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}
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select {
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case <-time.After(time.Second):
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return false, fmt.Errorf("stats failed to send on interval")
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case ru := <-ch:
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if len(ru.Pids) == 0 {
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return false, fmt.Errorf("no pids recorded in stats")
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}
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}
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proc, err := os.FindProcess(ps.Pid)
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if err != nil {
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return false, err
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}
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err = proc.Signal(syscall.SIGKILL)
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if err != nil {
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return false, err
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}
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return true, nil
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}, func(err error) {
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assert.NoError(t, executor.Signal(os.Kill))
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assert.NoError(t, err)
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})
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}()
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ps, err = executor.Wait(context.Background())
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require.NoError(err)
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require.Equal(ps.Signal, int(syscall.SIGKILL))
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})
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}
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}
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func TestExecutor_Start_Kill(pt *testing.T) {
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pt.Parallel()
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for name, factory := range executorFactories {
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pt.Run(name, func(t *testing.T) {
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require := require.New(t)
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execCmd, allocDir := testExecutorCommand(t)
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execCmd.Cmd = "/bin/sleep"
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execCmd.Args = []string{"10"}
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defer allocDir.Destroy()
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executor := factory(testlog.HCLogger(t))
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defer executor.Shutdown("", 0)
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ps, err := executor.Launch(execCmd)
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require.NoError(err)
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require.NotZero(ps.Pid)
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require.NoError(executor.Shutdown("SIGINT", 100*time.Millisecond))
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time.Sleep(time.Duration(tu.TestMultiplier()*2) * time.Second)
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outWriter, _ := execCmd.GetWriters()
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output := outWriter.(*bufferCloser).String()
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expected := ""
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act := strings.TrimSpace(string(output))
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if act != expected {
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t.Fatalf("Command output incorrectly: want %v; got %v", expected, act)
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}
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})
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}
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}
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func TestUniversalExecutor_MakeExecutable(t *testing.T) {
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t.Parallel()
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// Create a temp file
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f, err := ioutil.TempFile("", "")
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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defer os.Remove(f.Name())
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// Set its permissions to be non-executable
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f.Chmod(os.FileMode(0610))
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err = makeExecutable(f.Name())
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if err != nil {
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t.Fatalf("makeExecutable() failed: %v", err)
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}
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// Check the permissions
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stat, err := f.Stat()
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if err != nil {
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t.Fatalf("Stat() failed: %v", err)
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}
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act := stat.Mode().Perm()
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exp := os.FileMode(0755)
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if act != exp {
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t.Fatalf("expected permissions %v; got %v", exp, act)
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}
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}
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func TestUniversalExecutor_LookupPath(t *testing.T) {
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t.Parallel()
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// Create a temp dir
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tmpDir, err := ioutil.TempDir("", "")
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require := require.New(t)
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require.Nil(err)
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defer os.Remove(tmpDir)
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// Make a foo subdir
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os.MkdirAll(filepath.Join(tmpDir, "foo"), 0700)
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// Write a file under foo
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filePath := filepath.Join(tmpDir, "foo", "tmp.txt")
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err = ioutil.WriteFile(filePath, []byte{1, 2}, os.ModeAppend)
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require.Nil(err)
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// Lookup with full path to binary
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_, err = lookupBin("dummy", filePath)
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require.Nil(err)
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// Write a file under local subdir
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os.MkdirAll(filepath.Join(tmpDir, "local"), 0700)
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filePath2 := filepath.Join(tmpDir, "local", "tmp.txt")
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ioutil.WriteFile(filePath2, []byte{1, 2}, os.ModeAppend)
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// Lookup with file name, should find the one we wrote above
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_, err = lookupBin(tmpDir, "tmp.txt")
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require.Nil(err)
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// Write a file under task dir
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filePath3 := filepath.Join(tmpDir, "tmp.txt")
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ioutil.WriteFile(filePath3, []byte{1, 2}, os.ModeAppend)
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// Lookup with file name, should find the one we wrote above
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_, err = lookupBin(tmpDir, "tmp.txt")
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require.Nil(err)
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}
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// setupRoootfs setups the rootfs for libcontainer executor
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// It uses busybox to make some binaries available - somewhat cheaper
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// than mounting the underlying host filesystem
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func setupRootfs(t *testing.T, rootfs string) {
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paths := []string{
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"/bin/sh",
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"/bin/sleep",
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"/bin/echo",
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"/bin/date",
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}
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for _, p := range paths {
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setupRootfsBinary(t, rootfs, p)
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}
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}
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// setupRootfsBinary installs a busybox link in the desired path
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func setupRootfsBinary(t *testing.T, rootfs, path string) {
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t.Helper()
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dst := filepath.Join(rootfs, path)
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err := os.MkdirAll(filepath.Dir(dst), 666)
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require.NoError(t, err)
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src := filepath.Join(
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"test-resources", "busybox",
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fmt.Sprintf("busybox-%s", runtime.GOARCH),
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)
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err = os.Link(src, dst)
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require.NoError(t, err)
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}
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