374 lines
8.9 KiB
Go
374 lines
8.9 KiB
Go
package driver
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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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"path/filepath"
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"reflect"
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"strings"
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"testing"
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"time"
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"github.com/hashicorp/nomad/client/config"
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"github.com/hashicorp/nomad/client/driver/env"
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"github.com/hashicorp/nomad/nomad/structs"
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"github.com/hashicorp/nomad/testutil"
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ctestutils "github.com/hashicorp/nomad/client/testutil"
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)
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func TestExecDriver_Fingerprint(t *testing.T) {
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ctestutils.ExecCompatible(t)
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task := &structs.Task{
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Name: "foo",
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Driver: "exec",
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Resources: structs.DefaultResources(),
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}
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ctx := testDriverContexts(t, task)
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defer ctx.AllocDir.Destroy()
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d := NewExecDriver(ctx.DriverCtx)
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node := &structs.Node{
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Attributes: map[string]string{
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"unique.cgroup.mountpoint": "/sys/fs/cgroup",
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},
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}
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apply, err := d.Fingerprint(&config.Config{}, node)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if !apply {
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t.Fatalf("should apply")
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}
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if node.Attributes["driver.exec"] == "" {
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t.Fatalf("missing driver")
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}
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}
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func TestExecDriver_StartOpen_Wait(t *testing.T) {
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ctestutils.ExecCompatible(t)
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task := &structs.Task{
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Name: "sleep",
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Driver: "exec",
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Config: 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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LogConfig: &structs.LogConfig{
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MaxFiles: 10,
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MaxFileSizeMB: 10,
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},
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Resources: basicResources,
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}
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ctx := testDriverContexts(t, task)
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defer ctx.AllocDir.Destroy()
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d := NewExecDriver(ctx.DriverCtx)
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if _, err := d.Prestart(ctx.ExecCtx, task); err != nil {
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t.Fatalf("prestart err: %v", err)
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}
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resp, err := d.Start(ctx.ExecCtx, task)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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// Attempt to open
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handle2, err := d.Open(ctx.ExecCtx, resp.Handle.ID())
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if handle2 == nil {
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t.Fatalf("missing handle")
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}
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resp.Handle.Kill()
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handle2.Kill()
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}
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func TestExecDriver_Start_Wait(t *testing.T) {
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ctestutils.ExecCompatible(t)
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task := &structs.Task{
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Name: "sleep",
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Driver: "exec",
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Config: map[string]interface{}{
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"command": "/bin/sleep",
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"args": []string{"2"},
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},
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LogConfig: &structs.LogConfig{
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MaxFiles: 10,
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MaxFileSizeMB: 10,
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},
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Resources: basicResources,
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}
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ctx := testDriverContexts(t, task)
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defer ctx.AllocDir.Destroy()
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d := NewExecDriver(ctx.DriverCtx)
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if _, err := d.Prestart(ctx.ExecCtx, task); err != nil {
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t.Fatalf("prestart err: %v", err)
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}
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resp, err := d.Start(ctx.ExecCtx, task)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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// Update should be a no-op
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err = resp.Handle.Update(task)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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// Task should terminate quickly
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select {
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case res := <-resp.Handle.WaitCh():
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if !res.Successful() {
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t.Fatalf("err: %v", res)
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}
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case <-time.After(time.Duration(testutil.TestMultiplier()*5) * time.Second):
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t.Fatalf("timeout")
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}
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}
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func TestExecDriver_Start_Wait_AllocDir(t *testing.T) {
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ctestutils.ExecCompatible(t)
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exp := []byte{'w', 'i', 'n'}
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file := "output.txt"
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task := &structs.Task{
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Name: "sleep",
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Driver: "exec",
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Config: 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 > ${%s}/%s`, string(exp), env.AllocDir, file),
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},
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},
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LogConfig: &structs.LogConfig{
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MaxFiles: 10,
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MaxFileSizeMB: 10,
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},
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Resources: basicResources,
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}
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ctx := testDriverContexts(t, task)
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defer ctx.AllocDir.Destroy()
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d := NewExecDriver(ctx.DriverCtx)
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if _, err := d.Prestart(ctx.ExecCtx, task); err != nil {
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t.Fatalf("prestart err: %v", err)
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}
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resp, err := d.Start(ctx.ExecCtx, task)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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// Task should terminate quickly
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select {
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case res := <-resp.Handle.WaitCh():
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if !res.Successful() {
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t.Fatalf("err: %v", res)
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}
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case <-time.After(time.Duration(testutil.TestMultiplier()*5) * time.Second):
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t.Fatalf("timeout")
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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(ctx.AllocDir.SharedDir, file)
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act, err := ioutil.ReadFile(outputFile)
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if err != nil {
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t.Fatalf("Couldn't read expected output: %v", err)
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}
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if !reflect.DeepEqual(act, exp) {
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t.Fatalf("Command outputted %v; want %v", act, exp)
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}
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}
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func TestExecDriver_Start_Kill_Wait(t *testing.T) {
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ctestutils.ExecCompatible(t)
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task := &structs.Task{
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Name: "sleep",
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Driver: "exec",
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Config: 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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LogConfig: &structs.LogConfig{
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MaxFiles: 10,
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MaxFileSizeMB: 10,
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},
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Resources: basicResources,
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KillTimeout: 10 * time.Second,
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}
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ctx := testDriverContexts(t, task)
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defer ctx.AllocDir.Destroy()
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d := NewExecDriver(ctx.DriverCtx)
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if _, err := d.Prestart(ctx.ExecCtx, task); err != nil {
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t.Fatalf("prestart err: %v", err)
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}
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resp, err := d.Start(ctx.ExecCtx, task)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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go func() {
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time.Sleep(100 * time.Millisecond)
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err := resp.Handle.Kill()
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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}()
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// Task should terminate quickly
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select {
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case res := <-resp.Handle.WaitCh():
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if res.Successful() {
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t.Fatal("should err")
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}
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case <-time.After(time.Duration(testutil.TestMultiplier()*10) * time.Second):
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t.Fatalf("timeout")
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}
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}
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func TestExecDriverUser(t *testing.T) {
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ctestutils.ExecCompatible(t)
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task := &structs.Task{
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Name: "sleep",
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Driver: "exec",
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User: "alice",
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Config: 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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LogConfig: &structs.LogConfig{
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MaxFiles: 10,
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MaxFileSizeMB: 10,
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},
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Resources: basicResources,
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KillTimeout: 10 * time.Second,
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}
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ctx := testDriverContexts(t, task)
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defer ctx.AllocDir.Destroy()
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d := NewExecDriver(ctx.DriverCtx)
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if _, err := d.Prestart(ctx.ExecCtx, task); err != nil {
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t.Fatalf("prestart err: %v", err)
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}
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resp, err := d.Start(ctx.ExecCtx, task)
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if err == nil {
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resp.Handle.Kill()
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t.Fatalf("Should've failed")
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}
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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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ctestutils.ExecCompatible(t)
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task := &structs.Task{
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Name: "sleep",
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Driver: "exec",
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Config: 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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LogConfig: &structs.LogConfig{
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MaxFiles: 10,
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MaxFileSizeMB: 10,
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},
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Resources: basicResources,
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}
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ctx := testDriverContexts(t, task)
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defer ctx.AllocDir.Destroy()
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d := NewExecDriver(ctx.DriverCtx)
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if _, err := d.Prestart(ctx.ExecCtx, task); err != nil {
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t.Fatalf("prestart err: %v", err)
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}
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resp, err := d.Start(ctx.ExecCtx, task)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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handle := resp.Handle
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// Exec a command that should work and dump the environment
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out, code, err := handle.Exec(context.Background(), "/bin/sh", []string{"-c", "env | grep NOMAD"})
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if err != nil {
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t.Fatalf("error exec'ing stat: %v", err)
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}
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if code != 0 {
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t.Fatalf("expected `stat /alloc` to succeed but exit code was: %d", code)
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}
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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(out), "\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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if v, ok := scriptEnv["NOMAD_ALLOC_ID"]; !ok || v != ctx.DriverCtx.allocID {
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t.Errorf("Expected NOMAD_SECRETS_DIR=%q but found=%t value=%q", ctx.DriverCtx.allocID, ok, v)
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}
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// Assert cgroup membership
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out, code, err = handle.Exec(context.Background(), "/bin/cat", []string{"/proc/self/cgroup"})
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if err != nil {
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t.Fatalf("error exec'ing cat /proc/self/cgroup: %v", err)
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}
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if code != 0 {
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t.Fatalf("expected `cat /proc/self/cgroup` to succeed but exit code was: %d", code)
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}
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found := false
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for _, line := range strings.Split(string(out), "\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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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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if !found {
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t.Errorf("exec'd command isn't in the task's cgroup")
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}
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// Exec a command that should fail
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out, code, err = handle.Exec(context.Background(), "/usr/bin/stat", []string{"lkjhdsaflkjshowaisxmcvnlia"})
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if err != nil {
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t.Fatalf("error exec'ing stat: %v", err)
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}
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if code == 0 {
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t.Fatalf("expected `stat` to fail but exit code was: %d", code)
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}
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if expected := "No such file or directory"; !bytes.Contains(out, []byte(expected)) {
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t.Fatalf("expected output to contain %q but found: %q", expected, out)
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}
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if err := handle.Kill(); err != nil {
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t.Fatalf("error killing exec handle: %v", err)
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}
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}
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