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Merge pull request #8390 from hashicorp/lifecycle-poststart-hook 

task lifecycle poststart hook
This commit is contained in:
Jasmine Dahilig 2020-08-31 13:53:24 -07:00 committed by GitHub
parent 33dc50dca0 fbe0c89ab1
commit 71a694f39c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 683 additions and 33 deletions
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1
api/tasks.go
View File

@ -632,6 +632,7 @@ type DispatchPayloadConfig struct {
const (
TaskLifecycleHookPrestart = "prestart"
TaskLifecycleHookPoststart = "poststart"
)
type TaskLifecycle struct {

153
client/allocrunner/alloc_runner_test.go
View File

@ -142,6 +142,100 @@ func TestAllocRunner_TaskLeader_KillTG(t *testing.T) {
})
}
// TestAllocRunner_Lifecycle_Poststart asserts that a service job with 2
// poststart lifecycle hooks (1 sidecar, 1 ephemeral) starts all 3 tasks, only
// the ephemeral one finishes, and the other 2 exit when the alloc is stopped.
func TestAllocRunner_Lifecycle_Poststart(t *testing.T) {
alloc := mock.LifecycleAlloc()
alloc.Job.Type = structs.JobTypeService
mainTask := alloc.Job.TaskGroups[0].Tasks[0]
mainTask.Config["run_for"] = "100s"
sidecarTask := alloc.Job.TaskGroups[0].Tasks[1]
sidecarTask.Lifecycle.Hook = structs.TaskLifecycleHookPoststart
sidecarTask.Config["run_for"] = "100s"
ephemeralTask := alloc.Job.TaskGroups[0].Tasks[2]
ephemeralTask.Lifecycle.Hook = structs.TaskLifecycleHookPoststart
conf, cleanup := testAllocRunnerConfig(t, alloc)
defer cleanup()
ar, err := NewAllocRunner(conf)
require.NoError(t, err)
defer destroy(ar)
go ar.Run()
upd := conf.StateUpdater.(*MockStateUpdater)
// Wait for main and sidecar tasks to be running, and that the
// ephemeral task ran and exited.
testutil.WaitForResult(func() (bool, error) {
last := upd.Last()
if last == nil {
return false, fmt.Errorf("No updates")
}
if last.ClientStatus != structs.AllocClientStatusRunning {
return false, fmt.Errorf("expected alloc to be running not %s", last.ClientStatus)
}
if s := last.TaskStates[mainTask.Name].State; s != structs.TaskStateRunning {
return false, fmt.Errorf("expected main task to be running not %s", s)
}
if s := last.TaskStates[sidecarTask.Name].State; s != structs.TaskStateRunning {
return false, fmt.Errorf("expected sidecar task to be running not %s", s)
}
if s := last.TaskStates[ephemeralTask.Name].State; s != structs.TaskStateDead {
return false, fmt.Errorf("expected ephemeral task to be dead not %s", s)
}
if last.TaskStates[ephemeralTask.Name].Failed {
return false, fmt.Errorf("expected ephemeral task to be successful not failed")
}
return true, nil
}, func(err error) {
t.Fatalf("error waiting for initial state:\n%v", err)
})
// Tell the alloc to stop
stopAlloc := alloc.Copy()
stopAlloc.DesiredStatus = structs.AllocDesiredStatusStop
ar.Update(stopAlloc)
// Wait for main and sidecar tasks to stop.
testutil.WaitForResult(func() (bool, error) {
last := upd.Last()
if last.ClientStatus != structs.AllocClientStatusComplete {
return false, fmt.Errorf("expected alloc to be running not %s", last.ClientStatus)
}
if s := last.TaskStates[mainTask.Name].State; s != structs.TaskStateDead {
return false, fmt.Errorf("expected main task to be dead not %s", s)
}
if last.TaskStates[mainTask.Name].Failed {
return false, fmt.Errorf("expected main task to be successful not failed")
}
if s := last.TaskStates[sidecarTask.Name].State; s != structs.TaskStateDead {
return false, fmt.Errorf("expected sidecar task to be dead not %s", s)
}
if last.TaskStates[sidecarTask.Name].Failed {
return false, fmt.Errorf("expected sidecar task to be successful not failed")
}
return true, nil
}, func(err error) {
t.Fatalf("error waiting for initial state:\n%v", err)
})
}
// TestAllocRunner_TaskMain_KillTG asserts that when main tasks die the
// entire task group is killed.
func TestAllocRunner_TaskMain_KillTG(t *testing.T) {
@ -152,20 +246,34 @@ func TestAllocRunner_TaskMain_KillTG(t *testing.T) {
alloc.Job.TaskGroups[0].RestartPolicy.Attempts = 0
alloc.Job.TaskGroups[0].Tasks[0].RestartPolicy.Attempts = 0
// Create three tasks in the task group
sidecar := alloc.Job.TaskGroups[0].Tasks[0].Copy()
sidecar.Name = "sidecar"
sidecar.Driver = "mock_driver"
sidecar.KillTimeout = 10 * time.Millisecond
sidecar.Lifecycle = &structs.TaskLifecycleConfig{
// Create four tasks in the task group
prestart := alloc.Job.TaskGroups[0].Tasks[0].Copy()
prestart.Name = "prestart-sidecar"
prestart.Driver = "mock_driver"
prestart.KillTimeout = 10 * time.Millisecond
prestart.Lifecycle = &structs.TaskLifecycleConfig{
Hook: structs.TaskLifecycleHookPrestart,
Sidecar: true,
}
sidecar.Config = map[string]interface{}{
prestart.Config = map[string]interface{}{
"run_for": "100s",
}
poststart := alloc.Job.TaskGroups[0].Tasks[0].Copy()
poststart.Name = "poststart-sidecar"
poststart.Driver = "mock_driver"
poststart.KillTimeout = 10 * time.Millisecond
poststart.Lifecycle = &structs.TaskLifecycleConfig{
Hook: structs.TaskLifecycleHookPoststart,
Sidecar: true,
}
poststart.Config = map[string]interface{}{
"run_for": "100s",
}
// these two main tasks have the same name, is that ok?
main1 := alloc.Job.TaskGroups[0].Tasks[0].Copy()
main1.Name = "task2"
main1.Driver = "mock_driver"
@ -180,9 +288,10 @@ func TestAllocRunner_TaskMain_KillTG(t *testing.T) {
"run_for": "2s",
}
alloc.Job.TaskGroups[0].Tasks = []*structs.Task{sidecar, main1, main2}
alloc.Job.TaskGroups[0].Tasks = []*structs.Task{prestart, poststart, main1, main2}
alloc.AllocatedResources.Tasks = map[string]*structs.AllocatedTaskResources{
sidecar.Name: tr,
prestart.Name: tr,
poststart.Name: tr,
main1.Name: tr,
main2.Name: tr,
}
@ -217,8 +326,30 @@ func TestAllocRunner_TaskMain_KillTG(t *testing.T) {
var state *structs.TaskState
// Task1 should be killed because Task2 exited
state = last.TaskStates[sidecar.Name]
// both sidecars should be killed because Task2 exited
state = last.TaskStates[prestart.Name]
if state == nil {
return false, fmt.Errorf("could not find state for task %s", prestart.Name)
}
if state.State != structs.TaskStateDead {
return false, fmt.Errorf("got state %v; want %v", state.State, structs.TaskStateDead)
}
if state.FinishedAt.IsZero() || state.StartedAt.IsZero() {
return false, fmt.Errorf("expected to have a start and finish time")
}
if len(state.Events) < 2 {
// At least have a received and destroyed
return false, fmt.Errorf("Unexpected number of events")
}
if !hasTaskMainEvent(state) {
return false, fmt.Errorf("Did not find event %v: %#+v", structs.TaskMainDead, state.Events)
}
state = last.TaskStates[poststart.Name]
if state == nil {
return false, fmt.Errorf("could not find state for task %s", poststart.Name)
}
if state.State != structs.TaskStateDead {
return false, fmt.Errorf("got state %v; want %v", state.State, structs.TaskStateDead)
}

54
client/allocrunner/task_hook_coordinator.go
View File

@ -18,23 +18,31 @@ type taskHookCoordinator struct {
mainTaskCtx context.Context
mainTaskCtxCancel func()
poststartTaskCtx context.Context
poststartTaskCtxCancel func()
prestartSidecar map[string]struct{}
prestartEphemeral map[string]struct{}
mainTasksPending map[string]struct{}
}
func newTaskHookCoordinator(logger hclog.Logger, tasks []*structs.Task) *taskHookCoordinator {
closedCh := make(chan struct{})
close(closedCh)
mainTaskCtx, cancelFn := context.WithCancel(context.Background())
mainTaskCtx, mainCancelFn := context.WithCancel(context.Background())
poststartTaskCtx, poststartCancelFn := context.WithCancel(context.Background())
c := &taskHookCoordinator{
logger: logger,
closedCh: closedCh,
mainTaskCtx: mainTaskCtx,
mainTaskCtxCancel: cancelFn,
mainTaskCtxCancel: mainCancelFn,
prestartSidecar: map[string]struct{}{},
prestartEphemeral: map[string]struct{}{},
mainTasksPending: map[string]struct{}{},
poststartTaskCtx: poststartTaskCtx,
poststartTaskCtxCancel: poststartCancelFn,
}
c.setTasks(tasks)
return c
@ -44,7 +52,7 @@ func (c *taskHookCoordinator) setTasks(tasks []*structs.Task) {
for _, task := range tasks {
if task.Lifecycle == nil {
// move nothing
c.mainTasksPending[task.Name] = struct{}{}
continue
}
@ -55,9 +63,10 @@ func (c *taskHookCoordinator) setTasks(tasks []*structs.Task) {
} else {
c.prestartEphemeral[task.Name] = struct{}{}
}
case structs.TaskLifecycleHookPoststart:
// Poststart hooks don't need to be tracked.
default:
c.logger.Error("invalid lifecycle hook", "hook", task.Lifecycle.Hook)
c.logger.Error("invalid lifecycle hook", "task", task.Name, "hook", task.Lifecycle.Hook)
}
}
@ -70,22 +79,28 @@ func (c *taskHookCoordinator) hasPrestartTasks() bool {
return len(c.prestartSidecar)+len(c.prestartEphemeral) > 0
}
func (c *taskHookCoordinator) startConditionForTask(task *structs.Task) <-chan struct{} {
if task.Lifecycle != nil && task.Lifecycle.Hook == structs.TaskLifecycleHookPrestart {
return c.closedCh
func (c *taskHookCoordinator) hasPendingMainTasks() bool {
return len(c.mainTasksPending) > 0
}
func (c *taskHookCoordinator) startConditionForTask(task *structs.Task) <-chan struct{} {
if task.Lifecycle == nil {
return c.mainTaskCtx.Done()
}
switch task.Lifecycle.Hook {
case structs.TaskLifecycleHookPrestart:
// Prestart tasks start without checking status of other tasks
return c.closedCh
case structs.TaskLifecycleHookPoststart:
return c.poststartTaskCtx.Done()
default:
return c.mainTaskCtx.Done()
}
}
// This is not thread safe! This must only be called from one thread per alloc runner.
func (c *taskHookCoordinator) taskStateUpdated(states map[string]*structs.TaskState) {
if c.mainTaskCtx.Err() != nil {
// nothing to do here
return
}
for task := range c.prestartSidecar {
st := states[task]
if st == nil || st.StartedAt.IsZero() {
@ -104,10 +119,23 @@ func (c *taskHookCoordinator) taskStateUpdated(states map[string]*structs.TaskSt
delete(c.prestartEphemeral, task)
}
for task := range c.mainTasksPending {
st := states[task]
if st == nil || st.StartedAt.IsZero() {
continue
}
delete(c.mainTasksPending, task)
}
// everything well
if !c.hasPrestartTasks() {
c.mainTaskCtxCancel()
}
if !c.hasPendingMainTasks() {
c.poststartTaskCtxCancel()
}
}
// hasNonSidecarTasks returns false if all the passed tasks are sidecar tasks

46
client/allocrunner/task_hook_coordinator_test.go
View File

@ -224,6 +224,52 @@ func TestTaskHookCoordinator_SidecarNeverStarts(t *testing.T) {
require.Falsef(t, isChannelClosed(mainCh), "%s channel was closed, should be open", mainTask.Name)
}
func TestTaskHookCoordinator_PoststartStartsAfterMain(t *testing.T) {
logger := testlog.HCLogger(t)
alloc := mock.LifecycleAlloc()
tasks := alloc.Job.TaskGroups[0].Tasks
mainTask := tasks[0]
sideTask := tasks[1]
postTask := tasks[2]
// Make the the third task a poststart hook
postTask.Lifecycle.Hook = structs.TaskLifecycleHookPoststart
coord := newTaskHookCoordinator(logger, tasks)
postCh := coord.startConditionForTask(postTask)
sideCh := coord.startConditionForTask(sideTask)
mainCh := coord.startConditionForTask(mainTask)
require.Truef(t, isChannelClosed(sideCh), "%s channel was open, should be closed", sideTask.Name)
require.Falsef(t, isChannelClosed(mainCh), "%s channel was closed, should be open", mainTask.Name)
require.Falsef(t, isChannelClosed(mainCh), "%s channel was closed, should be open", postTask.Name)
states := map[string]*structs.TaskState{
postTask.Name: {
State: structs.TaskStatePending,
Failed: false,
},
mainTask.Name: {
State: structs.TaskStateRunning,
Failed: false,
StartedAt: time.Now(),
},
sideTask.Name: {
State: structs.TaskStateRunning,
Failed: false,
StartedAt: time.Now(),
},
}
coord.taskStateUpdated(states)
require.Truef(t, isChannelClosed(postCh), "%s channel was open, should be closed", postTask.Name)
require.Truef(t, isChannelClosed(sideCh), "%s channel was open, should be closed", sideTask.Name)
require.Truef(t, isChannelClosed(mainCh), "%s channel was open, should be closed", mainTask.Name)
}
func isChannelClosed(ch <-chan struct{}) bool {
select {
case <-ch:

8
client/allocrunner/taskrunner/restarts/restarts.go
View File

@ -21,11 +21,19 @@ const (
)
func NewRestartTracker(policy *structs.RestartPolicy, jobType string, tlc *structs.TaskLifecycleConfig) *RestartTracker {
// Batch jobs should not restart if they exit successfully
onSuccess := jobType != structs.JobTypeBatch
// Prestart sidecars should get restarted on success
if tlc != nil && tlc.Hook == structs.TaskLifecycleHookPrestart {
onSuccess = tlc.Sidecar
}
// Poststart sidecars should get restarted on success
if tlc != nil && tlc.Hook == structs.TaskLifecycleHookPoststart {
onSuccess = tlc.Sidecar
}
return &RestartTracker{
startTime: time.Now(),
onSuccess: onSuccess,

1
e2e/e2e_test.go
View File

@ -17,6 +17,7 @@ import (
_ "github.com/hashicorp/nomad/e2e/deployment"
_ "github.com/hashicorp/nomad/e2e/example"
_ "github.com/hashicorp/nomad/e2e/hostvolumes"
_ "github.com/hashicorp/nomad/e2e/lifecycle"
_ "github.com/hashicorp/nomad/e2e/metrics"
_ "github.com/hashicorp/nomad/e2e/nomad09upgrade"
_ "github.com/hashicorp/nomad/e2e/nomadexec"

127
e2e/lifecycle/inputs/batch.nomad Normal file
View File

@ -0,0 +1,127 @@
# lifecycle hook test job for batch jobs. touches, removes, and tests
# for the existence of files to assert the order of running tasks.
# all tasks should exit 0 and the alloc dir should contain the following
# files: ./init-ran, ./main-ran, ./poststart-run
job "batch-lifecycle" {
datacenters = ["dc1"]
type = "batch"
group "test" {
task "init" {
lifecycle {
hook = "prestart"
}
driver = "docker"
config {
image = "busybox:1"
command = "/bin/sh"
args = ["local/prestart.sh"]
}
template {
data = <<EOT
#!/bin/sh
sleep 1
touch ${NOMAD_ALLOC_DIR}/init-ran
touch ${NOMAD_ALLOC_DIR}/init-running
sleep 5
if [ -f ${NOMAD_ALLOC_DIR}/main ]; then exit 7; fi
if [ -f ${NOMAD_ALLOC_DIR}/poststart-running ]; then exit 8; fi
rm ${NOMAD_ALLOC_DIR}/init-running
EOT
destination = "local/prestart.sh"
}
resources {
cpu = 64
memory = 64
}
}
task "main" {
driver = "docker"
config {
image = "busybox:1"
command = "/bin/sh"
args = ["local/main.sh"]
}
template {
data = <<EOT
#!/bin/sh
sleep 1
touch ${NOMAD_ALLOC_DIR}/main-running
touch ${NOMAD_ALLOC_DIR}/main-started
# NEED TO HANG AROUND TO GIVE POSTSTART TIME TO GET STARTED
sleep 10
if [ ! -f ${NOMAD_ALLOC_DIR}/init-ran ]; then exit 9; fi
if [ -f ${NOMAD_ALLOC_DIR}/init-running ]; then exit 10; fi
if [ ! -f ${NOMAD_ALLOC_DIR}/poststart-started ]; then exit 11; fi
touch ${NOMAD_ALLOC_DIR}/main-ran
rm ${NOMAD_ALLOC_DIR}/main-running
EOT
destination = "local/main.sh"
}
resources {
cpu = 64
memory = 64
}
}
task "poststart" {
lifecycle {
hook = "poststart"
}
driver = "docker"
config {
image = "busybox:1"
command = "/bin/sh"
args = ["local/poststart.sh"]
}
template {
data = <<EOT
#!/bin/sh
sleep 1
touch ${NOMAD_ALLOC_DIR}/poststart-ran
touch ${NOMAD_ALLOC_DIR}/poststart-running
touch ${NOMAD_ALLOC_DIR}/poststart-started
sleep 10
# THIS IS WHERE THE ACTUAL TESTING HAPPENS
# IF init-ran doesn't exist, then the init task hasn't run yet, so fail
if [ ! -f ${NOMAD_ALLOC_DIR}/init-ran ]; then exit 12; fi
if [ ! -f ${NOMAD_ALLOC_DIR}/main-started ]; then exit 15; fi
if [ -f ${NOMAD_ALLOC_DIR}/init-running ]; then exit 14; fi
rm ${NOMAD_ALLOC_DIR}/poststart-running
EOT
destination = "local/poststart.sh"
}
resources {
cpu = 64
memory = 64
}
}
}
}

160
e2e/lifecycle/inputs/service.nomad Normal file
View File

@ -0,0 +1,160 @@
# lifecycle hook test job for service jobs. touches, removes, and tests
# for the existence of files to assert the order of running tasks.
# after stopping, the alloc dir should contain the following files:
# files: ./init-ran, ./sidecar-ran, ./main-ran, ./poststart-run but not
# the ./main-running, ./sidecar-running, or ./poststart-running files
job "service-lifecycle" {
datacenters = ["dc1"]
type = "service"
group "test" {
task "init" {
lifecycle {
hook = "prestart"
}
driver = "docker"
config {
image = "busybox:1"
command = "/bin/sh"
args = ["local/prestart.sh"]
}
template {
data = <<EOT
#!/bin/sh
sleep 1
touch ${NOMAD_ALLOC_DIR}/init-ran
touch ${NOMAD_ALLOC_DIR}/init-running
if [ -f ${NOMAD_ALLOC_DIR}/main ]; then exit 7; fi
if [ -f ${NOMAD_ALLOC_DIR}/poststart ]; then exit 8; fi
rm ${NOMAD_ALLOC_DIR}/init-running
EOT
destination = "local/prestart.sh"
}
resources {
cpu = 64
memory = 64
}
}
task "sidecar" {
lifecycle {
hook = "prestart"
sidecar = true
}
driver = "docker"
config {
image = "busybox:1"
command = "/bin/sh"
args = ["local/sidecar.sh"]
}
template {
data = <<EOT
#!/bin/sh
touch ${NOMAD_ALLOC_DIR}/sidecar-ran
touch ${NOMAD_ALLOC_DIR}/sidecar-running
sleep 5
if [ ! -f ${NOMAD_ALLOC_DIR}/main-running ]; then exit 9; fi
if [ -f ${NOMAD_ALLOC_DIR}/poststart-running ]; then exit 10; fi
sleep 300
EOT
destination = "local/sidecar.sh"
}
resources {
cpu = 64
memory = 64
}
}
task "main" {
driver = "docker"
config {
image = "busybox:1"
command = "/bin/sh"
args = ["local/main.sh"]
}
template {
data = <<EOT
#!/bin/sh
touch ${NOMAD_ALLOC_DIR}/main-ran
touch ${NOMAD_ALLOC_DIR}/main-running
touch ${NOMAD_ALLOC_DIR}/main-started
if [ ! -f ${NOMAD_ALLOC_DIR}/init-ran ]; then exit 11; fi
if [ -f ${NOMAD_ALLOC_DIR}/init-running ]; then exit 12; fi
if [ ! -f ${NOMAD_ALLOC_DIR}/sidecar-ran ]; then exit 13; fi
if [ ! -f ${NOMAD_ALLOC_DIR}/sidecar-running ]; then exit 14; fi
sleep 2
if [ ! -f ${NOMAD_ALLOC_DIR}/poststart-started ]; then exit 15; fi
touch ${NOMAD_ALLOC_DIR}/main-checked
sleep 300
EOT
destination = "local/main.sh"
}
resources {
cpu = 64
memory = 64
}
}
task "poststart" {
lifecycle {
hook = "poststart"
}
driver = "docker"
config {
image = "busybox:1"
command = "/bin/sh"
args = ["local/poststart.sh"]
}
template {
data = <<EOT
#!/bin/sh
touch ${NOMAD_ALLOC_DIR}/poststart-ran
touch ${NOMAD_ALLOC_DIR}/poststart-running
touch ${NOMAD_ALLOC_DIR}/poststart-started
if [ ! -f ${NOMAD_ALLOC_DIR}/init-ran ]; then exit 16; fi
if [ -f ${NOMAD_ALLOC_DIR}/init-running ]; then exit 17; fi
if [ ! -f ${NOMAD_ALLOC_DIR}/sidecar-ran ]; then exit 18; fi
if [ ! -f ${NOMAD_ALLOC_DIR}/sidecar-running ]; then exit 19; fi
if [ ! -f ${NOMAD_ALLOC_DIR}/main-started ]; then exit 20; fi
rm ${NOMAD_ALLOC_DIR}/poststart-running
EOT
destination = "local/poststart.sh"
}
resources {
cpu = 64
memory = 64
}
}
}
}

144
e2e/lifecycle/lifecycle.go Normal file
View File

@ -0,0 +1,144 @@
package lifecycle
import (
"fmt"
"github.com/hashicorp/nomad/api"
"github.com/hashicorp/nomad/e2e/e2eutil"
"github.com/hashicorp/nomad/e2e/framework"
"github.com/hashicorp/nomad/helper/uuid"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/hashicorp/nomad/testutil"
"github.com/stretchr/testify/require"
)
type LifecycleE2ETest struct {
framework.TC
jobIDs []string
}
func init() {
framework.AddSuites(&framework.TestSuite{
Component: "Lifecycle",
CanRunLocal: true,
Cases: []framework.TestCase{new(LifecycleE2ETest)},
})
}
// Ensure cluster has leader and at least 1 client node
// in a ready state before running tests
func (tc *LifecycleE2ETest) BeforeAll(f *framework.F) {
e2eutil.WaitForLeader(f.T(), tc.Nomad())
e2eutil.WaitForNodesReady(f.T(), tc.Nomad(), 1)
}
// TestBatchJob runs a batch job with prestart and poststop hooks
func (tc *LifecycleE2ETest) TestBatchJob(f *framework.F) {
t := f.T()
require := require.New(t)
nomadClient := tc.Nomad()
uuid := uuid.Generate()
jobID := "lifecycle-" + uuid[0:8]
tc.jobIDs = append(tc.jobIDs, jobID)
allocs := e2eutil.RegisterAndWaitForAllocs(f.T(), nomadClient, "lifecycle/inputs/batch.nomad", jobID, "")
require.Equal(1, len(allocs))
allocID := allocs[0].ID
// wait for the job to stop and assert we stopped successfully, not failed
e2eutil.WaitForAllocStopped(t, nomadClient, allocID)
alloc, _, err := nomadClient.Allocations().Info(allocID, nil)
require.NoError(err)
require.Equal(structs.AllocClientStatusComplete, alloc.ClientStatus)
// assert the files were written as expected
afi, _, err := nomadClient.AllocFS().List(alloc, "alloc", nil)
require.NoError(err)
expected := map[string]bool{
"init-ran": true, "main-ran": true, "poststart-ran": true,
"init-running": false, "main-running": false, "poststart-running": false}
got := checkFiles(expected, afi)
require.Equal(expected, got)
}
// TestServiceJob runs a service job with prestart and poststop hooks
func (tc *LifecycleE2ETest) TestServiceJob(f *framework.F) {
t := f.T()
require := require.New(t)
nomadClient := tc.Nomad()
uuid := uuid.Generate()
jobID := "lifecycle-" + uuid[0:8]
tc.jobIDs = append(tc.jobIDs, jobID)
allocs := e2eutil.RegisterAndWaitForAllocs(f.T(), nomadClient, "lifecycle/inputs/service.nomad", jobID, "")
require.Equal(1, len(allocs))
allocID := allocs[0].ID
//e2eutil.WaitForAllocRunning(t, nomadClient, allocID)
testutil.WaitForResult(func() (bool, error) {
alloc, _, err := nomadClient.Allocations().Info(allocID, nil)
if err != nil {
return false, err
}
if alloc.ClientStatus != structs.AllocClientStatusRunning {
return false, fmt.Errorf("expected status running, but was: %s", alloc.ClientStatus)
}
if alloc.TaskStates["poststart"].FinishedAt.IsZero() {
return false, fmt.Errorf("poststart task hasn't started")
}
afi, _, err := nomadClient.AllocFS().List(alloc, "alloc", nil)
if err != nil {
return false, err
}
expected := map[string]bool{
"main-checked": true}
got := checkFiles(expected, afi)
if !got["main-checked"] {
return false, fmt.Errorf("main-checked file has not been written")
}
return true, nil
}, func(err error) {
t.Fatalf("failed to wait on alloc: %v", err)
})
alloc, _, err := nomadClient.Allocations().Info(allocID, nil)
require.NoError(err)
require.False(alloc.TaskStates["poststart"].Failed)
// stop the job
_, _, err = nomadClient.Jobs().Deregister(jobID, false, nil)
require.NoError(err)
e2eutil.WaitForAllocStopped(t, nomadClient, allocID)
// assert the files were written as expected
afi, _, err := nomadClient.AllocFS().List(alloc, "alloc", nil)
require.NoError(err)
expected := map[string]bool{
"init-ran": true, "sidecar-ran": true, "main-ran": true, "poststart-ran": true,
"poststart-started": true, "main-started": true,
"init-running": false, "poststart-running": false,
"main-checked": true}
got := checkFiles(expected, afi)
require.Equal(expected, got)
}
// checkFiles returns a map of whether the expected files were found
// in the file info response
func checkFiles(expected map[string]bool, got []*api.AllocFileInfo) map[string]bool {
results := map[string]bool{}
for expect := range expected {
results[expect] = false
}
for _, file := range got {
// there will be files unrelated to the test, so ignore those
if _, ok := results[file.Name]; ok {
results[file.Name] = true
}
}
return results
}

2
nomad/mock/mock.go
View File

@ -368,6 +368,7 @@ func VariableLifecycleJob(resources structs.Resources, main int, init int, side
job.Canonicalize()
return job
}
func LifecycleJob() *structs.Job {
job := &structs.Job{
Region: "global",
@ -455,6 +456,7 @@ func LifecycleJob() *structs.Job {
job.Canonicalize()
return job
}
func LifecycleAlloc() *structs.Allocation {
alloc := &structs.Allocation{
ID: uuid.Generate(),

2
nomad/structs/structs.go
View File

@ -4901,6 +4901,7 @@ func (d *DispatchPayloadConfig) Validate() error {
const (
TaskLifecycleHookPrestart = "prestart"
TaskLifecycleHookPoststart = "poststart"
)
type TaskLifecycleConfig struct {
@ -4924,6 +4925,7 @@ func (d *TaskLifecycleConfig) Validate() error {
switch d.Hook {
case TaskLifecycleHookPrestart:
case TaskLifecycleHookPoststart:
case "":
return fmt.Errorf("no lifecycle hook provided")
default: