Files
kubernetes/pkg/kubectl/cmd/get_test.go
Clayton Coleman 72ee028cab Gracefully delete pods from the Kubelet
This commit wires together the graceful delete option for pods
on the Kubelet.  When a pod is deleted on the API server, a
grace period is calculated that is based on the
Pod.Spec.TerminationGracePeriodInSeconds, the user's provided grace
period, or a default.  The grace period can only shrink once set.
The value provided by the user (or the default) is set onto metadata
as DeletionGracePeriod.

When the Kubelet sees a pod with DeletionTimestamp set, it uses the
value of ObjectMeta.GracePeriodSeconds as the grace period
sent to Docker.  When updating status, if the pod has DeletionTimestamp
set and all containers are terminated, the Kubelet will update the
status one last time and then invoke Delete(pod, grace: 0) to
clean up the pod immediately.
2015-06-01 19:23:59 -04:00

685 lines
19 KiB
Go

/*
Copyright 2014 The Kubernetes Authors All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cmd
import (
"bytes"
encjson "encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"reflect"
"strings"
"testing"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/latest"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/testapi"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/watch"
"github.com/GoogleCloudPlatform/kubernetes/pkg/watch/json"
)
func testData() (*api.PodList, *api.ServiceList, *api.ReplicationControllerList) {
grace := int64(30)
pods := &api.PodList{
ListMeta: api.ListMeta{
ResourceVersion: "15",
},
Items: []api.Pod{
{
ObjectMeta: api.ObjectMeta{Name: "foo", Namespace: "test", ResourceVersion: "10"},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyAlways,
DNSPolicy: api.DNSClusterFirst,
TerminationGracePeriodSeconds: &grace,
},
},
{
ObjectMeta: api.ObjectMeta{Name: "bar", Namespace: "test", ResourceVersion: "11"},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyAlways,
DNSPolicy: api.DNSClusterFirst,
TerminationGracePeriodSeconds: &grace,
},
},
},
}
svc := &api.ServiceList{
ListMeta: api.ListMeta{
ResourceVersion: "16",
},
Items: []api.Service{
{
ObjectMeta: api.ObjectMeta{Name: "baz", Namespace: "test", ResourceVersion: "12"},
Spec: api.ServiceSpec{
SessionAffinity: "None",
Type: api.ServiceTypeClusterIP,
},
},
},
}
rc := &api.ReplicationControllerList{
ListMeta: api.ListMeta{
ResourceVersion: "17",
},
Items: []api.ReplicationController{
{
ObjectMeta: api.ObjectMeta{Name: "rc1", Namespace: "test", ResourceVersion: "18"},
Spec: api.ReplicationControllerSpec{
Replicas: 1,
},
},
},
}
return pods, svc, rc
}
func testComponentStatusData() *api.ComponentStatusList {
good := &api.ComponentStatus{
Conditions: []api.ComponentCondition{
{Type: api.ComponentHealthy, Status: api.ConditionTrue, Message: "ok", Error: "nil"},
},
}
good.Name = "servergood"
bad := &api.ComponentStatus{
Conditions: []api.ComponentCondition{
{Type: api.ComponentHealthy, Status: api.ConditionFalse, Message: "", Error: "bad status: 500"},
},
}
bad.Name = "serverbad"
unknown := &api.ComponentStatus{
Conditions: []api.ComponentCondition{
{Type: api.ComponentHealthy, Status: api.ConditionUnknown, Message: "", Error: "fizzbuzz error"},
},
}
unknown.Name = "serverunknown"
return &api.ComponentStatusList{
Items: []api.ComponentStatus{*good, *bad, *unknown},
}
}
// Verifies that schemas that are not in the master tree of Kubernetes can be retrieved via Get.
func TestGetUnknownSchemaObject(t *testing.T) {
f, tf, codec := NewTestFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Resp: &http.Response{StatusCode: 200, Body: objBody(codec, &internalType{Name: "foo"})},
}
tf.Namespace = "test"
tf.ClientConfig = &client.Config{Version: latest.Version}
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Run(cmd, []string{"type", "foo"})
expected := &internalType{Name: "foo"}
actual := tf.Printer.(*testPrinter).Objects[0]
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v", actual)
}
if buf.String() != fmt.Sprintf("%#v", expected) {
t.Errorf("unexpected output: %s", buf.String())
}
}
// Verifies that schemas that are not in the master tree of Kubernetes can be retrieved via Get.
// Because api.List is part of the Kube API, resource.Builder has to perform a conversion on
// api.Scheme, which may not have access to all objects, and not all objects are at the same
// internal versioning scheme. This test verifies that two isolated schemes (Test, and api.Scheme)
// can be conjoined into a single output object.
func TestGetUnknownSchemaObjectListGeneric(t *testing.T) {
testCases := map[string]struct {
output string
list string
obj1 string
obj2 string
}{
"handles specific version": {
output: "v1",
list: "v1",
obj1: "unlikelyversion",
obj2: "v1",
},
"handles second specific version": {
output: "unlikelyversion",
list: "v1beta3",
obj1: "unlikelyversion", // doesn't have v1beta3
obj2: "v1beta3", // version of the API response
},
"handles common version": {
output: "v1beta3",
list: "v1beta3",
obj1: "unlikelyversion", // because test scheme defaults to unlikelyversion
obj2: "v1beta3",
},
}
for k, test := range testCases {
apiCodec := runtime.CodecFor(api.Scheme, "v1beta3")
regularClient := &client.FakeRESTClient{
Codec: apiCodec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
return &http.Response{StatusCode: 200, Body: objBody(apiCodec, &api.ReplicationController{ObjectMeta: api.ObjectMeta{Name: "foo"}})}, nil
}),
}
f, tf, codec := NewMixedFactory(regularClient)
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
return &http.Response{StatusCode: 200, Body: objBody(codec, &internalType{Name: "foo"})}, nil
}),
}
tf.Namespace = "test"
tf.ClientConfig = &client.Config{Version: latest.Version}
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Flags().Set("output", "json")
cmd.Flags().Set("output-version", test.output)
err := RunGet(f, buf, cmd, []string{"type/foo", "replicationcontrollers/foo"})
if err != nil {
t.Errorf("%s: unexpected error: %v", k, err)
continue
}
out := make(map[string]interface{})
if err := encjson.Unmarshal(buf.Bytes(), &out); err != nil {
t.Errorf("%s: unexpected error: %v\n%s", k, err, buf.String())
continue
}
if out["apiVersion"] != test.list {
t.Errorf("%s: unexpected list: %#v", k, out)
}
arr := out["items"].([]interface{})
if arr[0].(map[string]interface{})["apiVersion"] != test.obj1 {
t.Errorf("%s: unexpected list: %#v", k, out)
}
if arr[1].(map[string]interface{})["apiVersion"] != test.obj2 {
t.Errorf("%s: unexpected list: %#v", k, out)
}
}
}
// Verifies that schemas that are not in the master tree of Kubernetes can be retrieved via Get.
func TestGetSchemaObject(t *testing.T) {
f, tf, _ := NewTestFactory()
tf.Mapper = latest.RESTMapper
tf.Typer = api.Scheme
codec := latest.Codec
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Resp: &http.Response{StatusCode: 200, Body: objBody(codec, &api.ReplicationController{ObjectMeta: api.ObjectMeta{Name: "foo"}})},
}
tf.Namespace = "test"
tf.ClientConfig = &client.Config{Version: "v1beta3"}
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.Run(cmd, []string{"replicationcontrollers", "foo"})
if !strings.Contains(buf.String(), "\"foo\"") {
t.Errorf("unexpected output: %s", buf.String())
}
}
func TestGetObjects(t *testing.T) {
pods, _, _ := testData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Resp: &http.Response{StatusCode: 200, Body: objBody(codec, &pods.Items[0])},
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Run(cmd, []string{"pods", "foo"})
expected := []runtime.Object{&pods.Items[0]}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v", actual)
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func TestGetListObjects(t *testing.T) {
pods, _, _ := testData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Resp: &http.Response{StatusCode: 200, Body: objBody(codec, pods)},
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Run(cmd, []string{"pods"})
expected := []runtime.Object{pods}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v %#v", expected, actual)
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func TestGetListComponentStatus(t *testing.T) {
statuses := testComponentStatusData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Resp: &http.Response{StatusCode: 200, Body: objBody(codec, statuses)},
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Run(cmd, []string{"componentstatuses"})
expected := []runtime.Object{statuses}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v %#v", expected, actual)
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func TestGetMultipleTypeObjects(t *testing.T) {
pods, svc, _ := testData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
switch req.URL.Path {
case "/namespaces/test/pods":
return &http.Response{StatusCode: 200, Body: objBody(codec, pods)}, nil
case "/namespaces/test/services":
return &http.Response{StatusCode: 200, Body: objBody(codec, svc)}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Run(cmd, []string{"pods,services"})
expected := []runtime.Object{pods, svc}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v", actual)
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func TestGetMultipleTypeObjectsAsList(t *testing.T) {
pods, svc, _ := testData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
switch req.URL.Path {
case "/namespaces/test/pods":
return &http.Response{StatusCode: 200, Body: objBody(codec, pods)}, nil
case "/namespaces/test/services":
return &http.Response{StatusCode: 200, Body: objBody(codec, svc)}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
tf.ClientConfig = &client.Config{Version: testapi.Version()}
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Flags().Set("output", "json")
cmd.Run(cmd, []string{"pods,services"})
if tf.Printer.(*testPrinter).Objects != nil {
t.Errorf("unexpected print to default printer")
}
out, err := codec.Decode(buf.Bytes())
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
list, err := runtime.ExtractList(out)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if errs := runtime.DecodeList(list, api.Scheme); len(errs) > 0 {
t.Fatalf("unexpected error: %v", errs)
}
if err := runtime.SetList(out, list); err != nil {
t.Fatalf("unexpected error: %v", err)
}
expected := &api.List{
Items: []runtime.Object{
&pods.Items[0],
&pods.Items[1],
&svc.Items[0],
},
}
if !reflect.DeepEqual(expected, out) {
t.Errorf("unexpected output: %#v", out)
}
}
func TestGetMultipleTypeObjectsWithSelector(t *testing.T) {
pods, svc, _ := testData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
if req.URL.Query().Get(api.LabelSelectorQueryParam(testapi.Version())) != "a=b" {
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
}
switch req.URL.Path {
case "/namespaces/test/pods":
return &http.Response{StatusCode: 200, Body: objBody(codec, pods)}, nil
case "/namespaces/test/services":
return &http.Response{StatusCode: 200, Body: objBody(codec, svc)}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Flags().Set("selector", "a=b")
cmd.Run(cmd, []string{"pods,services"})
expected := []runtime.Object{pods, svc}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v", actual)
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func TestGetMultipleTypeObjectsWithDirectReference(t *testing.T) {
_, svc, _ := testData()
node := &api.Node{
ObjectMeta: api.ObjectMeta{
Name: "foo",
},
Spec: api.NodeSpec{
ExternalID: "ext",
},
}
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
switch req.URL.Path {
case "/nodes/foo":
return &http.Response{StatusCode: 200, Body: objBody(codec, node)}, nil
case "/namespaces/test/services/bar":
return &http.Response{StatusCode: 200, Body: objBody(codec, &svc.Items[0])}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Run(cmd, []string{"services/bar", "node/foo"})
expected := []runtime.Object{&svc.Items[0], node}
actual := tf.Printer.(*testPrinter).Objects
if !api.Semantic.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %s", util.ObjectDiff(expected, actual))
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func watchTestData() ([]api.Pod, []watch.Event) {
grace := int64(30)
pods := []api.Pod{
{
ObjectMeta: api.ObjectMeta{
Name: "foo",
Namespace: "test",
ResourceVersion: "10",
},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyAlways,
DNSPolicy: api.DNSClusterFirst,
TerminationGracePeriodSeconds: &grace,
},
},
}
events := []watch.Event{
{
Type: watch.Modified,
Object: &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "foo",
Namespace: "test",
ResourceVersion: "11",
},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyAlways,
DNSPolicy: api.DNSClusterFirst,
TerminationGracePeriodSeconds: &grace,
},
},
},
{
Type: watch.Deleted,
Object: &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "foo",
Namespace: "test",
ResourceVersion: "12",
},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyAlways,
DNSPolicy: api.DNSClusterFirst,
TerminationGracePeriodSeconds: &grace,
},
},
},
}
return pods, events
}
func TestWatchSelector(t *testing.T) {
pods, events := watchTestData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
if req.URL.Query().Get(api.LabelSelectorQueryParam(testapi.Version())) != "a=b" {
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
}
switch req.URL.Path {
case "/namespaces/test/pods":
return &http.Response{StatusCode: 200, Body: objBody(codec, &api.PodList{Items: pods})}, nil
case "/watch/namespaces/test/pods":
return &http.Response{StatusCode: 200, Body: watchBody(codec, events)}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Flags().Set("watch", "true")
cmd.Flags().Set("selector", "a=b")
cmd.Run(cmd, []string{"pods"})
expected := []runtime.Object{&api.PodList{Items: pods}, events[0].Object, events[1].Object}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v %#v", expected[0], actual[0])
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func TestWatchResource(t *testing.T) {
pods, events := watchTestData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
switch req.URL.Path {
case "/namespaces/test/pods/foo":
return &http.Response{StatusCode: 200, Body: objBody(codec, &pods[0])}, nil
case "/watch/namespaces/test/pods/foo":
return &http.Response{StatusCode: 200, Body: watchBody(codec, events)}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Flags().Set("watch", "true")
cmd.Run(cmd, []string{"pods", "foo"})
expected := []runtime.Object{&pods[0], events[0].Object, events[1].Object}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v", actual)
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func TestWatchOnlyResource(t *testing.T) {
pods, events := watchTestData()
f, tf, codec := NewAPIFactory()
tf.Printer = &testPrinter{}
tf.Client = &client.FakeRESTClient{
Codec: codec,
Client: client.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
switch req.URL.Path {
case "/namespaces/test/pods/foo":
return &http.Response{StatusCode: 200, Body: objBody(codec, &pods[0])}, nil
case "/watch/namespaces/test/pods/foo":
return &http.Response{StatusCode: 200, Body: watchBody(codec, events)}, nil
default:
t.Fatalf("unexpected request: %#v\n%#v", req.URL, req)
return nil, nil
}
}),
}
tf.Namespace = "test"
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdGet(f, buf)
cmd.SetOutput(buf)
cmd.Flags().Set("watch-only", "true")
cmd.Run(cmd, []string{"pods", "foo"})
expected := []runtime.Object{events[0].Object, events[1].Object}
actual := tf.Printer.(*testPrinter).Objects
if !reflect.DeepEqual(expected, actual) {
t.Errorf("unexpected object: %#v", actual)
}
if len(buf.String()) == 0 {
t.Errorf("unexpected empty output")
}
}
func watchBody(codec runtime.Codec, events []watch.Event) io.ReadCloser {
buf := bytes.NewBuffer([]byte{})
enc := json.NewEncoder(buf, codec)
for i := range events {
enc.Encode(&events[i])
}
return ioutil.NopCloser(buf)
}