/
controller_test.go
523 lines (448 loc) · 12.9 KB
/
controller_test.go
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package exec
import (
"context"
"errors"
"fmt"
"runtime"
"testing"
gogotypes "github.com/gogo/protobuf/types"
"github.com/moby/swarmkit/v2/api"
"github.com/moby/swarmkit/v2/log"
"github.com/stretchr/testify/assert"
)
func TestResolve(t *testing.T) {
var (
ctx = context.Background()
executor = &mockExecutor{}
task = newTestTask(t, api.TaskStateAssigned, api.TaskStateRunning)
)
_, status, err := Resolve(ctx, task, executor)
assert.NoError(t, err)
assert.Equal(t, api.TaskStateAccepted, status.State)
assert.Equal(t, "accepted", status.Message)
task.Status = *status
// now, we get no status update.
_, status, err = Resolve(ctx, task, executor)
assert.NoError(t, err)
assert.Equal(t, task.Status, *status)
// now test an error causing rejection
executor.err = errors.New("some error")
task = newTestTask(t, api.TaskStateAssigned, api.TaskStateRunning)
_, status, err = Resolve(ctx, task, executor)
assert.Equal(t, executor.err, err)
assert.Equal(t, api.TaskStateRejected, status.State)
// on Resolve failure, tasks already started should be considered failed
task = newTestTask(t, api.TaskStateStarting, api.TaskStateRunning)
_, status, err = Resolve(ctx, task, executor)
assert.Equal(t, executor.err, err)
assert.Equal(t, api.TaskStateFailed, status.State)
// on Resolve failure, tasks already in terminated state don't need update
task = newTestTask(t, api.TaskStateCompleted, api.TaskStateRunning)
_, status, err = Resolve(ctx, task, executor)
assert.Equal(t, executor.err, err)
assert.Equal(t, api.TaskStateCompleted, status.State)
// task is now foobared, from a reporting perspective but we can now
// resolve the controller for some reason. Ensure the task state isn't
// touched.
task.Status = *status
executor.err = nil
_, status, err = Resolve(ctx, task, executor)
assert.NoError(t, err)
assert.Equal(t, task.Status, *status)
}
func TestAcceptPrepare(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateAssigned, api.TaskStateRunning)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, 1, ctlr.calls["Prepare"])
}()
ctlr.PrepareFn = func(_ context.Context) error {
return nil
}
// Report acceptance.
status := checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateAccepted,
Message: "accepted",
})
// Actually prepare the task.
task.Status = *status
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStatePreparing,
Message: "preparing",
})
task.Status = *status
checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateReady,
Message: "prepared",
})
}
func TestPrepareAlready(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateAssigned, api.TaskStateRunning)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, 1, ctlr.calls["Prepare"])
}()
ctlr.PrepareFn = func(_ context.Context) error {
return ErrTaskPrepared
}
// Report acceptance.
status := checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateAccepted,
Message: "accepted",
})
// Actually prepare the task.
task.Status = *status
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStatePreparing,
Message: "preparing",
})
task.Status = *status
checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateReady,
Message: "prepared",
})
}
func TestPrepareFailure(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateAssigned, api.TaskStateRunning)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, ctlr.calls["Prepare"], 1)
}()
ctlr.PrepareFn = func(_ context.Context) error {
return errors.New("test error")
}
// Report acceptance.
status := checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateAccepted,
Message: "accepted",
})
// Actually prepare the task.
task.Status = *status
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStatePreparing,
Message: "preparing",
})
task.Status = *status
checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateRejected,
Message: "preparing",
Err: "test error",
})
}
func TestReadyRunning(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateReady, api.TaskStateRunning)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, 1, ctlr.calls["Start"])
assert.Equal(t, 2, ctlr.calls["Wait"])
}()
ctlr.StartFn = func(ctx context.Context) error {
return nil
}
ctlr.WaitFn = func(ctx context.Context) error {
if ctlr.calls["Wait"] == 1 {
return context.Canceled
} else if ctlr.calls["Wait"] == 2 {
return nil
} else {
panic("unexpected call!")
}
}
// Report starting
status := checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateStarting,
Message: "starting",
})
task.Status = *status
// start the container
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateRunning,
Message: "started",
})
task.Status = *status
// resume waiting
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateRunning,
Message: "started",
}, ErrTaskRetry)
task.Status = *status
// wait and cancel
dctlr := &StatuserController{
StubController: ctlr,
cstatus: &api.ContainerStatus{
ExitCode: 0,
},
}
checkDo(ctx, t, task, dctlr, &api.TaskStatus{
State: api.TaskStateCompleted,
Message: "finished",
RuntimeStatus: &api.TaskStatus_Container{
Container: &api.ContainerStatus{
ExitCode: 0,
},
},
})
}
func TestReadyRunningExitFailure(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateReady, api.TaskStateRunning)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, 1, ctlr.calls["Start"])
assert.Equal(t, 1, ctlr.calls["Wait"])
}()
ctlr.StartFn = func(ctx context.Context) error {
return nil
}
ctlr.WaitFn = func(ctx context.Context) error {
return newExitError(1)
}
// Report starting
status := checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateStarting,
Message: "starting",
})
task.Status = *status
// start the container
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateRunning,
Message: "started",
})
task.Status = *status
dctlr := &StatuserController{
StubController: ctlr,
cstatus: &api.ContainerStatus{
ExitCode: 1,
},
}
checkDo(ctx, t, task, dctlr, &api.TaskStatus{
State: api.TaskStateFailed,
RuntimeStatus: &api.TaskStatus_Container{
Container: &api.ContainerStatus{
ExitCode: 1,
},
},
Message: "started",
Err: "test error, exit code=1",
})
}
func TestAlreadyStarted(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateReady, api.TaskStateRunning)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, 1, ctlr.calls["Start"])
assert.Equal(t, 2, ctlr.calls["Wait"])
}()
ctlr.StartFn = func(ctx context.Context) error {
return ErrTaskStarted
}
ctlr.WaitFn = func(ctx context.Context) error {
if ctlr.calls["Wait"] == 1 {
return context.Canceled
} else if ctlr.calls["Wait"] == 2 {
return newExitError(1)
} else {
panic("unexpected call!")
}
}
// Before we can move to running, we have to move to startin.
status := checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateStarting,
Message: "starting",
})
task.Status = *status
// start the container
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateRunning,
Message: "started",
})
task.Status = *status
status = checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateRunning,
Message: "started",
}, ErrTaskRetry)
task.Status = *status
// now take the real exit to test wait cancelling.
dctlr := &StatuserController{
StubController: ctlr,
cstatus: &api.ContainerStatus{
ExitCode: 1,
},
}
checkDo(ctx, t, task, dctlr, &api.TaskStatus{
State: api.TaskStateFailed,
RuntimeStatus: &api.TaskStatus_Container{
Container: &api.ContainerStatus{
ExitCode: 1,
},
},
Message: "started",
Err: "test error, exit code=1",
})
}
func TestShutdown(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateNew, api.TaskStateShutdown)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, 1, ctlr.calls["Shutdown"])
}()
ctlr.ShutdownFn = func(_ context.Context) error {
return nil
}
checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateShutdown,
Message: "shutdown",
})
}
// TestDesiredStateRemove checks that the agent maintains SHUTDOWN as the
// maximum state in the agent. This is particularly relevant for the case
// where a service scale down or deletion sets the desired state of tasks
// that are supposed to be removed to REMOVE.
func TestDesiredStateRemove(t *testing.T) {
var (
task = newTestTask(t, api.TaskStateNew, api.TaskStateRemove)
ctx, ctlr, finish = buildTestEnv(t, task)
)
defer func() {
finish()
assert.Equal(t, 1, ctlr.calls["Shutdown"])
}()
ctlr.ShutdownFn = func(_ context.Context) error {
return nil
}
checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: api.TaskStateShutdown,
Message: "shutdown",
})
}
// TestDesiredStateRemoveOnlyNonterminal checks that the agent will only stop
// a container on REMOVE if it's not already in a terminal state. If the
// container is already in a terminal state, (like COMPLETE) the agent should
// take no action
func TestDesiredStateRemoveOnlyNonterminal(t *testing.T) {
// go through all terminal states, just for completeness' sake
for _, state := range []api.TaskState{
api.TaskStateCompleted,
api.TaskStateShutdown,
api.TaskStateFailed,
api.TaskStateRejected,
api.TaskStateRemove,
// no TaskStateOrphaned because that's not a state the task can be in
// on the agent
} {
// capture state variable here to run in parallel
state := state
t.Run(state.String(), func(t *testing.T) {
// go parallel to go faster
t.Parallel()
var (
// create a new task, actual state `state`, desired state
// shutdown
task = newTestTask(t, state, api.TaskStateShutdown)
ctx, ctlr, finish = buildTestEnv(t, task)
)
// make the shutdown function a noop
ctlr.ShutdownFn = func(_ context.Context) error {
return nil
}
// Note we check for error ErrTaskNoop, which will be raised
// because nothing happens
checkDo(ctx, t, task, ctlr, &api.TaskStatus{
State: state,
}, ErrTaskNoop)
defer func() {
finish()
// we should never have called shutdown
assert.Equal(t, 0, ctlr.calls["Shutdown"])
}()
})
}
}
// StatuserController is used to create a new Controller, which is also a ContainerStatuser.
// We cannot add ContainerStatus() to the Controller, due to the check in controller.go:242
type StatuserController struct {
*StubController
cstatus *api.ContainerStatus
}
func (mc *StatuserController) ContainerStatus(ctx context.Context) (*api.ContainerStatus, error) {
return mc.cstatus, nil
}
type exitCoder struct {
code int
}
func newExitError(code int) error { return &exitCoder{code} }
func (ec *exitCoder) Error() string { return fmt.Sprintf("test error, exit code=%v", ec.code) }
func (ec *exitCoder) ExitCode() int { return ec.code }
func checkDo(ctx context.Context, t *testing.T, task *api.Task, ctlr Controller, expected *api.TaskStatus, expectedErr ...error) *api.TaskStatus {
status, err := Do(ctx, task, ctlr)
if len(expectedErr) > 0 {
assert.Equal(t, expectedErr[0], err)
} else {
assert.NoError(t, err)
}
// if the status and task.Status are different, make sure new timestamp is greater
if task.Status.Timestamp != nil {
// crazy timestamp validation follows
previous, err := gogotypes.TimestampFromProto(task.Status.Timestamp)
assert.Nil(t, err)
current, err := gogotypes.TimestampFromProto(status.Timestamp)
assert.Nil(t, err)
if current.Before(previous) {
// ensure that the timestamp always proceeds forward
t.Fatalf("timestamp must proceed forward: %v < %v", current, previous)
}
}
copy := status.Copy()
copy.Timestamp = nil // don't check against timestamp
assert.Equal(t, expected, copy)
return status
}
func newTestTask(t *testing.T, state, desired api.TaskState) *api.Task {
return &api.Task{
ID: "test-task",
Status: api.TaskStatus{
State: state,
},
DesiredState: desired,
}
}
func buildTestEnv(t *testing.T, task *api.Task) (context.Context, *StubController, func()) {
var (
ctx, cancel = context.WithCancel(context.Background())
ctlr = NewStubController()
)
// Put test name into log messages. Awesome!
pc, _, _, ok := runtime.Caller(1)
if ok {
fn := runtime.FuncForPC(pc)
ctx = log.WithLogger(ctx, log.L.WithField("test", fn.Name()))
}
return ctx, ctlr, cancel
}
type mockExecutor struct {
Executor
err error
}
func (m *mockExecutor) Controller(t *api.Task) (Controller, error) {
return nil, m.err
}