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kubectl: more sophisticated pod selection for logs and attach

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This commit is contained in:
Michail Kargakis
2016-03-29 19:01:54 +02:00
parent 8fba6de835
commit a25088fe15
3 changed files with 258 additions and 20 deletions
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203
pkg/kubectl/cmd/util/factory_test.go
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@@ -19,14 +19,17 @@ package util
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"os/user"
"path"
"reflect"
"sort"
"strings"
"testing"
"time"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/testapi"
@@ -36,9 +39,13 @@ import (
"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
"k8s.io/kubernetes/pkg/client/unversioned/fake"
"k8s.io/kubernetes/pkg/client/unversioned/testclient"
"k8s.io/kubernetes/pkg/controller"
"k8s.io/kubernetes/pkg/kubectl"
"k8s.io/kubernetes/pkg/labels"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/util/flag"
"k8s.io/kubernetes/pkg/watch"
)
func TestNewFactoryDefaultFlagBindings(t *testing.T) {
@@ -394,3 +401,199 @@ func TestSubstitueUser(t *testing.T) {
}
}
}
func newPodList(count, isUnready, isUnhealthy int, labels map[string]string) *api.PodList {
pods := []api.Pod{}
for i := 0; i < count; i++ {
newPod := api.Pod{
ObjectMeta: api.ObjectMeta{
Name: fmt.Sprintf("pod-%d", i+1),
Namespace: api.NamespaceDefault,
CreationTimestamp: unversioned.Date(2016, time.April, 1, 1, 0, i, 0, time.UTC),
Labels: labels,
},
Status: api.PodStatus{
Conditions: []api.PodCondition{
{
Status: api.ConditionTrue,
Type: api.PodReady,
},
},
},
}
pods = append(pods, newPod)
}
if isUnready > -1 && isUnready < count {
pods[isUnready].Status.Conditions[0].Status = api.ConditionFalse
}
if isUnhealthy > -1 && isUnhealthy < count {
pods[isUnhealthy].Status.ContainerStatuses = []api.ContainerStatus{{RestartCount: 5}}
}
return &api.PodList{
Items: pods,
}
}
func TestGetFirstPod(t *testing.T) {
labelSet := map[string]string{"test": "selector"}
tests := []struct {
name string
podList *api.PodList
watching []watch.Event
sortBy func([]*api.Pod) sort.Interface
expected *api.Pod
expectedNum int
expectedErr bool
}{
{
name: "kubectl logs - two ready pods",
podList: newPodList(2, -1, -1, labelSet),
sortBy: func(pods []*api.Pod) sort.Interface { return controller.ActivePods(pods) },
expected: &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod-2",
Namespace: api.NamespaceDefault,
CreationTimestamp: unversioned.Date(2016, time.April, 1, 1, 0, 1, 0, time.UTC),
Labels: map[string]string{"test": "selector"},
},
Status: api.PodStatus{
Conditions: []api.PodCondition{
{
Status: api.ConditionTrue,
Type: api.PodReady,
},
},
},
},
expectedNum: 2,
},
{
name: "kubectl logs - one unhealthy, one healthy",
podList: newPodList(2, -1, 1, labelSet),
sortBy: func(pods []*api.Pod) sort.Interface { return controller.ActivePods(pods) },
expected: &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod-2",
Namespace: api.NamespaceDefault,
CreationTimestamp: unversioned.Date(2016, time.April, 1, 1, 0, 1, 0, time.UTC),
Labels: map[string]string{"test": "selector"},
},
Status: api.PodStatus{
Conditions: []api.PodCondition{
{
Status: api.ConditionTrue,
Type: api.PodReady,
},
},
ContainerStatuses: []api.ContainerStatus{{RestartCount: 5}},
},
},
expectedNum: 2,
},
{
name: "kubectl attach - two ready pods",
podList: newPodList(2, -1, -1, labelSet),
sortBy: func(pods []*api.Pod) sort.Interface { return sort.Reverse(controller.ActivePods(pods)) },
expected: &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod-1",
Namespace: api.NamespaceDefault,
CreationTimestamp: unversioned.Date(2016, time.April, 1, 1, 0, 0, 0, time.UTC),
Labels: map[string]string{"test": "selector"},
},
Status: api.PodStatus{
Conditions: []api.PodCondition{
{
Status: api.ConditionTrue,
Type: api.PodReady,
},
},
},
},
expectedNum: 2,
},
{
name: "kubectl attach - wait for ready pod",
podList: newPodList(1, 1, -1, labelSet),
watching: []watch.Event{
{
Type: watch.Modified,
Object: &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod-1",
Namespace: api.NamespaceDefault,
CreationTimestamp: unversioned.Date(2016, time.April, 1, 1, 0, 0, 0, time.UTC),
Labels: map[string]string{"test": "selector"},
},
Status: api.PodStatus{
Conditions: []api.PodCondition{
{
Status: api.ConditionTrue,
Type: api.PodReady,
},
},
},
},
},
},
sortBy: func(pods []*api.Pod) sort.Interface { return sort.Reverse(controller.ActivePods(pods)) },
expected: &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod-1",
Namespace: api.NamespaceDefault,
CreationTimestamp: unversioned.Date(2016, time.April, 1, 1, 0, 0, 0, time.UTC),
Labels: map[string]string{"test": "selector"},
},
Status: api.PodStatus{
Conditions: []api.PodCondition{
{
Status: api.ConditionTrue,
Type: api.PodReady,
},
},
},
},
expectedNum: 1,
},
}
for i := range tests {
test := tests[i]
client := &testclient.Fake{}
client.PrependReactor("list", "pods", func(action testclient.Action) (handled bool, ret runtime.Object, err error) {
return true, test.podList, nil
})
if len(test.watching) > 0 {
watcher := watch.NewFake()
for _, event := range test.watching {
switch event.Type {
case watch.Added:
go watcher.Add(event.Object)
case watch.Modified:
go watcher.Modify(event.Object)
}
}
client.PrependWatchReactor("pods", testclient.DefaultWatchReactor(watcher, nil))
}
selector := labels.Set(labelSet).AsSelector()
pod, numPods, err := GetFirstPod(client, api.NamespaceDefault, selector, 1*time.Minute, test.sortBy)
if !test.expectedErr && err != nil {
t.Errorf("%s: unexpected error: %v", test.name, err)
continue
}
if test.expectedErr && err == nil {
t.Errorf("%s: expected an error", test.name)
continue
}
if test.expectedNum != numPods {
t.Errorf("%s: expected %d pods, got %d", test.name, test.expectedNum, numPods)
continue
}
if !reflect.DeepEqual(test.expected, pod) {
t.Errorf("%s:\nexpected pod:\n%#v\ngot:\n%#v\n\n", test.name, test.expected, pod)
}
}
}