758 lines
21 KiB
Go
758 lines
21 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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"os"
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"reflect"
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"strconv"
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"strings"
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"testing"
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"time"
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"github.com/spf13/cobra"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/testapi"
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"k8s.io/kubernetes/pkg/apis/batch"
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"k8s.io/kubernetes/pkg/apis/extensions"
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"k8s.io/kubernetes/pkg/apis/policy"
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"k8s.io/kubernetes/pkg/client/restclient/fake"
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cmdtesting "k8s.io/kubernetes/pkg/kubectl/cmd/testing"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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)
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const (
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EvictionMethod = "Eviction"
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DeleteMethod = "Delete"
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)
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var node *api.Node
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var cordoned_node *api.Node
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func TestMain(m *testing.M) {
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// Create a node.
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node = &api.Node{
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ObjectMeta: api.ObjectMeta{
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Name: "node",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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},
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Spec: api.NodeSpec{
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ExternalID: "node",
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},
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Status: api.NodeStatus{},
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}
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clone, _ := api.Scheme.DeepCopy(node)
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// A copy of the same node, but cordoned.
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cordoned_node = clone.(*api.Node)
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cordoned_node.Spec.Unschedulable = true
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os.Exit(m.Run())
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}
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func TestCordon(t *testing.T) {
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tests := []struct {
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description string
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node *api.Node
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expected *api.Node
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cmd func(cmdutil.Factory, io.Writer) *cobra.Command
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arg string
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expectFatal bool
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}{
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{
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description: "node/node syntax",
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node: cordoned_node,
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expected: node,
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cmd: NewCmdUncordon,
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arg: "node/node",
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expectFatal: false,
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},
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{
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description: "uncordon for real",
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node: cordoned_node,
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expected: node,
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cmd: NewCmdUncordon,
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arg: "node",
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expectFatal: false,
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},
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{
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description: "uncordon does nothing",
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node: node,
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expected: node,
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cmd: NewCmdUncordon,
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arg: "node",
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expectFatal: false,
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},
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{
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description: "cordon does nothing",
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node: cordoned_node,
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expected: cordoned_node,
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cmd: NewCmdCordon,
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arg: "node",
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expectFatal: false,
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},
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{
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description: "cordon for real",
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node: node,
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expected: cordoned_node,
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cmd: NewCmdCordon,
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arg: "node",
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expectFatal: false,
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},
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{
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description: "cordon missing node",
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node: node,
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expected: node,
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cmd: NewCmdCordon,
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arg: "bar",
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expectFatal: true,
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},
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{
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description: "uncordon missing node",
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node: node,
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expected: node,
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cmd: NewCmdUncordon,
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arg: "bar",
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expectFatal: true,
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},
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}
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for _, test := range tests {
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f, tf, codec, ns := cmdtesting.NewAPIFactory()
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new_node := &api.Node{}
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updated := false
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tf.Client = &fake.RESTClient{
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NegotiatedSerializer: ns,
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Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
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m := &MyReq{req}
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switch {
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case m.isFor("GET", "/nodes/node"):
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, test.node)}, nil
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case m.isFor("GET", "/nodes/bar"):
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return &http.Response{StatusCode: 404, Header: defaultHeader(), Body: stringBody("nope")}, nil
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case m.isFor("PUT", "/nodes/node"):
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data, err := ioutil.ReadAll(req.Body)
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if err != nil {
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t.Fatalf("%s: unexpected error: %v", test.description, err)
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}
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defer req.Body.Close()
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if err := runtime.DecodeInto(codec, data, new_node); err != nil {
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t.Fatalf("%s: unexpected error: %v", test.description, err)
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}
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if !reflect.DeepEqual(test.expected.Spec, new_node.Spec) {
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t.Fatalf("%s: expected:\n%v\nsaw:\n%v\n", test.description, test.expected.Spec, new_node.Spec)
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}
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updated = true
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, new_node)}, nil
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default:
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t.Fatalf("%s: unexpected request: %v %#v\n%#v", test.description, req.Method, req.URL, req)
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return nil, nil
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}
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}),
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}
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tf.ClientConfig = defaultClientConfig()
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buf := bytes.NewBuffer([]byte{})
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cmd := test.cmd(f, buf)
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saw_fatal := false
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func() {
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defer func() {
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// Recover from the panic below.
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_ = recover()
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// Restore cmdutil behavior
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cmdutil.DefaultBehaviorOnFatal()
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}()
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cmdutil.BehaviorOnFatal(func(e string, code int) {
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saw_fatal = true
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panic(e)
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})
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cmd.SetArgs([]string{test.arg})
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cmd.Execute()
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}()
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if test.expectFatal {
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if !saw_fatal {
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t.Fatalf("%s: unexpected non-error", test.description)
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}
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if updated {
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t.Fatalf("%s: unexpcted update", test.description)
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}
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}
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if !test.expectFatal && saw_fatal {
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t.Fatalf("%s: unexpected error", test.description)
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}
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if !reflect.DeepEqual(test.expected.Spec, test.node.Spec) && !updated {
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t.Fatalf("%s: node never updated", test.description)
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}
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}
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}
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func TestDrain(t *testing.T) {
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labels := make(map[string]string)
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labels["my_key"] = "my_value"
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rc := api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Name: "rc",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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SelfLink: testapi.Default.SelfLink("replicationcontrollers", "rc"),
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},
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Spec: api.ReplicationControllerSpec{
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Selector: labels,
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},
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}
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rc_anno := make(map[string]string)
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rc_anno[api.CreatedByAnnotation] = refJson(t, &rc)
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rc_pod := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: "bar",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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Annotations: rc_anno,
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},
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Spec: api.PodSpec{
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NodeName: "node",
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},
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}
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ds := extensions.DaemonSet{
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ObjectMeta: api.ObjectMeta{
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Name: "ds",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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SelfLink: "/apis/extensions/v1beta1/namespaces/default/daemonsets/ds",
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},
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Spec: extensions.DaemonSetSpec{
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Selector: &metav1.LabelSelector{MatchLabels: labels},
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},
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}
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ds_anno := make(map[string]string)
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ds_anno[api.CreatedByAnnotation] = refJson(t, &ds)
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ds_pod := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: "bar",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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Annotations: ds_anno,
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},
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Spec: api.PodSpec{
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NodeName: "node",
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},
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}
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job := batch.Job{
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ObjectMeta: api.ObjectMeta{
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Name: "job",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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SelfLink: "/apis/batch/v1/namespaces/default/jobs/job",
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},
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Spec: batch.JobSpec{
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Selector: &metav1.LabelSelector{MatchLabels: labels},
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},
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}
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job_pod := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: "bar",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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Annotations: map[string]string{api.CreatedByAnnotation: refJson(t, &job)},
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},
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}
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rs := extensions.ReplicaSet{
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ObjectMeta: api.ObjectMeta{
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Name: "rs",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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SelfLink: testapi.Default.SelfLink("replicasets", "rs"),
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},
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Spec: extensions.ReplicaSetSpec{
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Selector: &metav1.LabelSelector{MatchLabels: labels},
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},
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}
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rs_anno := make(map[string]string)
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rs_anno[api.CreatedByAnnotation] = refJson(t, &rs)
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rs_pod := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: "bar",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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Annotations: rs_anno,
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},
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Spec: api.PodSpec{
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NodeName: "node",
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},
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}
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naked_pod := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: "bar",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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},
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Spec: api.PodSpec{
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NodeName: "node",
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},
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}
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emptydir_pod := api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: "bar",
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Namespace: "default",
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CreationTimestamp: metav1.Time{Time: time.Now()},
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Labels: labels,
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},
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Spec: api.PodSpec{
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NodeName: "node",
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Volumes: []api.Volume{
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{
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Name: "scratch",
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VolumeSource: api.VolumeSource{EmptyDir: &api.EmptyDirVolumeSource{Medium: ""}},
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},
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},
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},
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}
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tests := []struct {
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description string
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node *api.Node
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expected *api.Node
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pods []api.Pod
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rcs []api.ReplicationController
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replicaSets []extensions.ReplicaSet
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args []string
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expectFatal bool
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expectDelete bool
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}{
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{
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description: "RC-managed pod",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{rc_pod},
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rcs: []api.ReplicationController{rc},
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args: []string{"node"},
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expectFatal: false,
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expectDelete: true,
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},
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{
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description: "DS-managed pod",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{ds_pod},
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rcs: []api.ReplicationController{rc},
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args: []string{"node"},
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expectFatal: true,
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expectDelete: false,
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},
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{
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description: "DS-managed pod with --ignore-daemonsets",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{ds_pod},
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rcs: []api.ReplicationController{rc},
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args: []string{"node", "--ignore-daemonsets"},
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expectFatal: false,
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expectDelete: false,
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},
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{
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description: "Job-managed pod",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{job_pod},
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rcs: []api.ReplicationController{rc},
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args: []string{"node"},
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expectFatal: false,
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expectDelete: true,
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},
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{
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description: "RS-managed pod",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{rs_pod},
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replicaSets: []extensions.ReplicaSet{rs},
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args: []string{"node"},
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expectFatal: false,
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expectDelete: true,
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},
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{
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description: "naked pod",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{naked_pod},
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rcs: []api.ReplicationController{},
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args: []string{"node"},
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expectFatal: true,
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expectDelete: false,
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},
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{
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description: "naked pod with --force",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{naked_pod},
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rcs: []api.ReplicationController{},
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args: []string{"node", "--force"},
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expectFatal: false,
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expectDelete: true,
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},
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{
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description: "pod with EmptyDir",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{emptydir_pod},
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args: []string{"node", "--force"},
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expectFatal: true,
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expectDelete: false,
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},
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{
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description: "pod with EmptyDir and --delete-local-data",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{emptydir_pod},
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args: []string{"node", "--force", "--delete-local-data=true"},
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expectFatal: false,
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expectDelete: true,
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},
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{
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description: "empty node",
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node: node,
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expected: cordoned_node,
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pods: []api.Pod{},
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rcs: []api.ReplicationController{rc},
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args: []string{"node"},
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expectFatal: false,
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expectDelete: false,
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},
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}
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testEviction := false
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for i := 0; i < 2; i++ {
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testEviction = !testEviction
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var currMethod string
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if testEviction {
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currMethod = EvictionMethod
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} else {
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currMethod = DeleteMethod
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}
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for _, test := range tests {
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new_node := &api.Node{}
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deleted := false
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evicted := false
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f, tf, codec, ns := cmdtesting.NewAPIFactory()
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tf.Client = &fake.RESTClient{
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NegotiatedSerializer: ns,
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Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
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m := &MyReq{req}
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switch {
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case req.Method == "GET" && req.URL.Path == "/api":
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apiVersions := metav1.APIVersions{
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Versions: []string{"v1"},
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}
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return genResponseWithJsonEncodedBody(apiVersions)
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case req.Method == "GET" && req.URL.Path == "/apis":
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groupList := metav1.APIGroupList{
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Groups: []metav1.APIGroup{
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{
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Name: "policy",
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PreferredVersion: metav1.GroupVersionForDiscovery{
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GroupVersion: "policy/v1beta1",
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},
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},
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},
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}
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return genResponseWithJsonEncodedBody(groupList)
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case req.Method == "GET" && req.URL.Path == "/api/v1":
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resourceList := metav1.APIResourceList{
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GroupVersion: "v1",
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}
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if testEviction {
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resourceList.APIResources = []metav1.APIResource{
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{
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Name: EvictionSubresource,
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Kind: EvictionKind,
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},
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}
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}
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return genResponseWithJsonEncodedBody(resourceList)
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case m.isFor("GET", "/nodes/node"):
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, test.node)}, nil
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case m.isFor("GET", "/namespaces/default/replicationcontrollers/rc"):
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, &test.rcs[0])}, nil
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case m.isFor("GET", "/namespaces/default/daemonsets/ds"):
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(testapi.Extensions.Codec(), &ds)}, nil
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case m.isFor("GET", "/namespaces/default/jobs/job"):
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(testapi.Batch.Codec(), &job)}, nil
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case m.isFor("GET", "/namespaces/default/replicasets/rs"):
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return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(testapi.Extensions.Codec(), &test.replicaSets[0])}, nil
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case m.isFor("GET", "/namespaces/default/pods/bar"):
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return &http.Response{StatusCode: 404, Header: defaultHeader(), Body: objBody(codec, &api.Pod{})}, nil
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case m.isFor("GET", "/pods"):
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values, err := url.ParseQuery(req.URL.RawQuery)
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if err != nil {
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t.Fatalf("%s: unexpected error: %v", test.description, err)
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}
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get_params := make(url.Values)
|
|
get_params["fieldSelector"] = []string{"spec.nodeName=node"}
|
|
if !reflect.DeepEqual(get_params, values) {
|
|
t.Fatalf("%s: expected:\n%v\nsaw:\n%v\n", test.description, get_params, values)
|
|
}
|
|
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, &api.PodList{Items: test.pods})}, nil
|
|
case m.isFor("GET", "/replicationcontrollers"):
|
|
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, &api.ReplicationControllerList{Items: test.rcs})}, nil
|
|
case m.isFor("PUT", "/nodes/node"):
|
|
data, err := ioutil.ReadAll(req.Body)
|
|
if err != nil {
|
|
t.Fatalf("%s: unexpected error: %v", test.description, err)
|
|
}
|
|
defer req.Body.Close()
|
|
if err := runtime.DecodeInto(codec, data, new_node); err != nil {
|
|
t.Fatalf("%s: unexpected error: %v", test.description, err)
|
|
}
|
|
if !reflect.DeepEqual(test.expected.Spec, new_node.Spec) {
|
|
t.Fatalf("%s: expected:\n%v\nsaw:\n%v\n", test.description, test.expected.Spec, new_node.Spec)
|
|
}
|
|
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: objBody(codec, new_node)}, nil
|
|
case m.isFor("DELETE", "/namespaces/default/pods/bar"):
|
|
deleted = true
|
|
return &http.Response{StatusCode: 204, Header: defaultHeader(), Body: objBody(codec, &test.pods[0])}, nil
|
|
case m.isFor("POST", "/namespaces/default/pods/bar/eviction"):
|
|
evicted = true
|
|
return &http.Response{StatusCode: 201, Header: defaultHeader(), Body: policyObjBody(&policy.Eviction{})}, nil
|
|
default:
|
|
t.Fatalf("%s: unexpected request: %v %#v\n%#v", test.description, req.Method, req.URL, req)
|
|
return nil, nil
|
|
}
|
|
}),
|
|
}
|
|
tf.ClientConfig = defaultClientConfig()
|
|
|
|
buf := bytes.NewBuffer([]byte{})
|
|
errBuf := bytes.NewBuffer([]byte{})
|
|
cmd := NewCmdDrain(f, buf, errBuf)
|
|
|
|
saw_fatal := false
|
|
func() {
|
|
defer func() {
|
|
// Recover from the panic below.
|
|
_ = recover()
|
|
// Restore cmdutil behavior
|
|
cmdutil.DefaultBehaviorOnFatal()
|
|
}()
|
|
cmdutil.BehaviorOnFatal(func(e string, code int) { saw_fatal = true; panic(e) })
|
|
cmd.SetArgs(test.args)
|
|
cmd.Execute()
|
|
}()
|
|
|
|
if test.expectFatal {
|
|
if !saw_fatal {
|
|
t.Fatalf("%s: unexpected non-error when using %s", test.description, currMethod)
|
|
}
|
|
}
|
|
|
|
if test.expectDelete {
|
|
// Test Delete
|
|
if !testEviction && !deleted {
|
|
t.Fatalf("%s: pod never deleted", test.description)
|
|
}
|
|
// Test Eviction
|
|
if testEviction && !evicted {
|
|
t.Fatalf("%s: pod never evicted", test.description)
|
|
}
|
|
}
|
|
if !test.expectDelete {
|
|
if deleted {
|
|
t.Fatalf("%s: unexpected delete when using %s", test.description, currMethod)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestDeletePods(t *testing.T) {
|
|
ifHasBeenCalled := map[string]bool{}
|
|
tests := []struct {
|
|
description string
|
|
interval time.Duration
|
|
timeout time.Duration
|
|
expectPendingPods bool
|
|
expectError bool
|
|
expectedError *error
|
|
getPodFn func(namespace, name string) (*api.Pod, error)
|
|
}{
|
|
{
|
|
description: "Wait for deleting to complete",
|
|
interval: 100 * time.Millisecond,
|
|
timeout: 10 * time.Second,
|
|
expectPendingPods: false,
|
|
expectError: false,
|
|
expectedError: nil,
|
|
getPodFn: func(namespace, name string) (*api.Pod, error) {
|
|
oldPodMap, _ := createPods(false)
|
|
newPodMap, _ := createPods(true)
|
|
if oldPod, found := oldPodMap[name]; found {
|
|
if _, ok := ifHasBeenCalled[name]; !ok {
|
|
ifHasBeenCalled[name] = true
|
|
return &oldPod, nil
|
|
}
|
|
if oldPod.ObjectMeta.Generation < 4 {
|
|
newPod := newPodMap[name]
|
|
return &newPod, nil
|
|
}
|
|
return nil, apierrors.NewNotFound(schema.GroupResource{Resource: "pods"}, name)
|
|
|
|
}
|
|
return nil, apierrors.NewNotFound(schema.GroupResource{Resource: "pods"}, name)
|
|
},
|
|
},
|
|
{
|
|
description: "Deleting could timeout",
|
|
interval: 200 * time.Millisecond,
|
|
timeout: 3 * time.Second,
|
|
expectPendingPods: true,
|
|
expectError: true,
|
|
expectedError: &wait.ErrWaitTimeout,
|
|
getPodFn: func(namespace, name string) (*api.Pod, error) {
|
|
oldPodMap, _ := createPods(false)
|
|
if oldPod, found := oldPodMap[name]; found {
|
|
return &oldPod, nil
|
|
}
|
|
return nil, fmt.Errorf("%q: not found", name)
|
|
},
|
|
},
|
|
{
|
|
description: "Client error could be passed out",
|
|
interval: 200 * time.Millisecond,
|
|
timeout: 5 * time.Second,
|
|
expectPendingPods: true,
|
|
expectError: true,
|
|
expectedError: nil,
|
|
getPodFn: func(namespace, name string) (*api.Pod, error) {
|
|
return nil, errors.New("This is a random error for testing")
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
f, _, _, _ := cmdtesting.NewAPIFactory()
|
|
o := DrainOptions{}
|
|
o.mapper, _ = f.Object()
|
|
o.out = os.Stdout
|
|
_, pods := createPods(false)
|
|
pendingPods, err := o.waitForDelete(pods, test.interval, test.timeout, false, test.getPodFn)
|
|
|
|
if test.expectError {
|
|
if err == nil {
|
|
t.Fatalf("%s: unexpected non-error", test.description)
|
|
} else if test.expectedError != nil {
|
|
if *test.expectedError != err {
|
|
t.Fatalf("%s: the error does not match expected error", test.description)
|
|
}
|
|
}
|
|
}
|
|
if !test.expectError && err != nil {
|
|
t.Fatalf("%s: unexpected error", test.description)
|
|
}
|
|
if test.expectPendingPods && len(pendingPods) == 0 {
|
|
t.Fatalf("%s: unexpected empty pods", test.description)
|
|
}
|
|
if !test.expectPendingPods && len(pendingPods) > 0 {
|
|
t.Fatalf("%s: unexpected pending pods", test.description)
|
|
}
|
|
}
|
|
}
|
|
|
|
func createPods(ifCreateNewPods bool) (map[string]api.Pod, []api.Pod) {
|
|
podMap := make(map[string]api.Pod)
|
|
podSlice := []api.Pod{}
|
|
for i := 0; i < 8; i++ {
|
|
var uid types.UID
|
|
if ifCreateNewPods {
|
|
uid = types.UID(i)
|
|
} else {
|
|
uid = types.UID(strconv.Itoa(i) + strconv.Itoa(i))
|
|
}
|
|
pod := api.Pod{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: "pod" + strconv.Itoa(i),
|
|
Namespace: "default",
|
|
UID: uid,
|
|
Generation: int64(i),
|
|
},
|
|
}
|
|
podMap[pod.Name] = pod
|
|
podSlice = append(podSlice, pod)
|
|
}
|
|
return podMap, podSlice
|
|
}
|
|
|
|
type MyReq struct {
|
|
Request *http.Request
|
|
}
|
|
|
|
func (m *MyReq) isFor(method string, path string) bool {
|
|
req := m.Request
|
|
|
|
return method == req.Method && (req.URL.Path == path ||
|
|
req.URL.Path == strings.Join([]string{"/api/v1", path}, "") ||
|
|
req.URL.Path == strings.Join([]string{"/apis/extensions/v1beta1", path}, "") ||
|
|
req.URL.Path == strings.Join([]string{"/apis/batch/v1", path}, ""))
|
|
}
|
|
|
|
func refJson(t *testing.T, o runtime.Object) string {
|
|
ref, err := api.GetReference(o)
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
|
|
_, _, codec, _ := cmdtesting.NewAPIFactory()
|
|
json, err := runtime.Encode(codec, &api.SerializedReference{Reference: *ref})
|
|
if err != nil {
|
|
t.Fatalf("unexpected error: %v", err)
|
|
}
|
|
|
|
return string(json)
|
|
}
|