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Code Issues Projects Releases Wiki Activity

Refactor Kubelet config sources for clarity 

Create a new "Pod" concept which can identify pods from
many config sources.
pull/6/head
Clayton Coleman 2014-07-15 10:52:39 -04:00
parent f672edd1cf
commit 09294b90ce
15 changed files with 1553 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
pkg/api/validation.go
View File

@ -272,9 +272,6 @@ func ValidateManifest(manifest *ContainerManifest) []error {
} else if !supportedManifestVersions.Has(strings.ToLower(manifest.Version)) {
allErrs.Append(makeNotSupportedError("ContainerManifest.Version", manifest.Version))
}
if !util.IsDNSSubdomain(manifest.ID) {
allErrs.Append(makeInvalidError("ContainerManifest.ID", manifest.ID))
}
allVolumes, errs := validateVolumes(manifest.Volumes)
if len(errs) != 0 {
allErrs.Append(errs...)

7
pkg/api/validation_test.go
View File

@ -242,11 +242,8 @@ func TestValidateManifest(t *testing.T) {
}
errorCases := map[string]ContainerManifest{
"empty version": {Version: "", ID: "abc"},
"invalid version": {Version: "bogus", ID: "abc"},
"zero-length id": {Version: "v1beta1", ID: ""},
"id > 255 characters": {Version: "v1beta1", ID: strings.Repeat("a", 256)},
"id not a DNS subdomain": {Version: "v1beta1", ID: "a.b.c."},
"empty version": {Version: "", ID: "abc"},
"invalid version": {Version: "bogus", ID: "abc"},
"invalid volume name": {
Version: "v1beta1",
ID: "abc",

304
pkg/kubelet/config/config.go Normal file
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@ -0,0 +1,304 @@
/*
Copyright 2014 Google Inc. 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 config
import (
"fmt"
"reflect"
"sync"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util/config"
"github.com/golang/glog"
)
// PodConfigListener receives notifications for changes to a configuration.
type PodConfigListener interface {
// OnUpdate is invoked when the kubelet.Pod configuration has been changed by one of
// the sources. The update is properly normalized to remove duplicates.
OnUpdate(pod kubelet.PodUpdate)
}
// ListenerFunc implements the PodConfigListener interface
type ListenerFunc func(update kubelet.PodUpdate)
func (h ListenerFunc) OnUpdate(update kubelet.PodUpdate) {
h(update)
}
// PodConfigNotificationMode describes how changes are sent to the update channel
type PodConfigNotificationMode int
const (
// PodConfigNotificationSnapshot delivers the full configuration as a SET whenever
// any change occurs
PodConfigNotificationSnapshot = iota
// PodConfigNotificationSetsAndUpdates delivers an UPDATE message whenever pods are
// changed, and a SET message if there are any additions or removals.
PodConfigNotificationSnapshotAndUpdates
// PodConfigNotificationIncremental delivers ADD, UPDATE, and REMOVE to the update channel
PodConfigNotificationIncremental
)
// PodConfig is a configuration mux that merges many sources of pod configuration into a single
// consistent structure, and then delivers incremental change notifications to listeners
// in order.
type PodConfig struct {
pods *podStorage
mux *config.Mux
// the channel of denormalized changes passed to listeners
updates chan kubelet.PodUpdate
}
// NewPodConfig creates an object that can merge many configuration sources into a stream
// of normalized updates to a pod configuration.
func NewPodConfig(mode PodConfigNotificationMode) *PodConfig {
updates := make(chan kubelet.PodUpdate, 1)
storage := newPodStorage(updates, mode)
podConfig := &PodConfig{
pods: storage,
mux: config.NewMux(storage),
updates: updates,
}
return podConfig
}
// Channel creates or returns a config source channel. The channel
// only accepts PodUpdates
func (c *PodConfig) Channel(source string) chan<- interface{} {
return c.mux.Channel(source)
}
// Updates returns a channel of updates to the configuration, properly denormalized.
func (c *PodConfig) Updates() <-chan kubelet.PodUpdate {
return c.updates
}
// Sync requests the full configuration be delivered to the update channel.
func (c *PodConfig) Sync() {
c.pods.Sync()
}
// podStorage manages the current pod state at any point in time and ensures updates
// to the channel are delivered in order. Note that this object is an in-memory source of
// "truth" and on creation contains zero entries. Once all previously read sources are
// available, then this object should be considered authoritative.
type podStorage struct {
podLock sync.RWMutex
// map of source name to pod name to pod reference
pods map[string]map[string]*kubelet.Pod
mode PodConfigNotificationMode
// ensures that updates are delivered in strict order
// on the updates channel
updateLock sync.Mutex
updates chan<- kubelet.PodUpdate
}
// TODO: PodConfigNotificationMode could be handled by a listener to the updates channel
// in the future, especially with multiple listeners.
// TODO: allow initialization of the current state of the store with snapshotted version.
func newPodStorage(updates chan<- kubelet.PodUpdate, mode PodConfigNotificationMode) *podStorage {
return &podStorage{
pods: make(map[string]map[string]*kubelet.Pod),
mode: mode,
updates: updates,
}
}
// Merge normalizes a set of incoming changes from different sources into a map of all Pods
// and ensures that redundant changes are filtered out, and then pushes zero or more minimal
// updates onto the update channel. Ensures that updates are delivered in order.
func (s *podStorage) Merge(source string, change interface{}) error {
s.updateLock.Lock()
defer s.updateLock.Unlock()
adds, updates, deletes := s.merge(source, change)
// deliver update notifications
switch s.mode {
case PodConfigNotificationIncremental:
if len(deletes.Pods) > 0 {
s.updates <- *deletes
}
if len(adds.Pods) > 0 {
s.updates <- *adds
}
if len(updates.Pods) > 0 {
s.updates <- *updates
}
case PodConfigNotificationSnapshotAndUpdates:
if len(updates.Pods) > 0 {
s.updates <- *updates
}
if len(deletes.Pods) > 0 || len(adds.Pods) > 0 {
s.updates <- kubelet.PodUpdate{s.MergedState().([]kubelet.Pod), kubelet.SET}
}
case PodConfigNotificationSnapshot:
if len(updates.Pods) > 0 || len(deletes.Pods) > 0 || len(adds.Pods) > 0 {
s.updates <- kubelet.PodUpdate{s.MergedState().([]kubelet.Pod), kubelet.SET}
}
default:
panic(fmt.Sprintf("unsupported PodConfigNotificationMode: %#v", s.mode))
}
return nil
}
func (s *podStorage) merge(source string, change interface{}) (adds, updates, deletes *kubelet.PodUpdate) {
s.podLock.Lock()
defer s.podLock.Unlock()
adds = &kubelet.PodUpdate{Op: kubelet.ADD}
updates = &kubelet.PodUpdate{Op: kubelet.UPDATE}
deletes = &kubelet.PodUpdate{Op: kubelet.REMOVE}
pods := s.pods[source]
if pods == nil {
pods = make(map[string]*kubelet.Pod)
}
update := change.(kubelet.PodUpdate)
switch update.Op {
case kubelet.ADD, kubelet.UPDATE:
if update.Op == kubelet.ADD {
glog.Infof("Adding new pods from source %s : %v", source, update.Pods)
} else {
glog.Infof("Updating pods from source %s : %v", source, update.Pods)
}
filtered := filterInvalidPods(update.Pods, source)
for _, ref := range filtered {
name := ref.Name
if existing, found := pods[name]; found {
if !reflect.DeepEqual(existing.Manifest, ref.Manifest) {
// this is an update
existing.Manifest = ref.Manifest
updates.Pods = append(updates.Pods, *existing)
continue
}
// this is a no-op
continue
}
// this is an add
ref.Namespace = source
pods[name] = ref
adds.Pods = append(adds.Pods, *ref)
}
case kubelet.REMOVE:
glog.Infof("Removing a pod %v", update)
for _, value := range update.Pods {
name := value.Name
if existing, found := pods[name]; found {
// this is a delete
delete(pods, name)
deletes.Pods = append(deletes.Pods, *existing)
continue
}
// this is a no-op
}
case kubelet.SET:
glog.Infof("Setting pods for source %s : %v", source, update)
// Clear the old map entries by just creating a new map
oldPods := pods
pods = make(map[string]*kubelet.Pod)
filtered := filterInvalidPods(update.Pods, source)
for _, ref := range filtered {
name := ref.Name
if existing, found := oldPods[name]; found {
pods[name] = existing
if !reflect.DeepEqual(existing.Manifest, ref.Manifest) {
// this is an update
existing.Manifest = ref.Manifest
updates.Pods = append(updates.Pods, *existing)
continue
}
// this is a no-op
continue
}
ref.Namespace = source
pods[name] = ref
adds.Pods = append(adds.Pods, *ref)
}
for name, existing := range oldPods {
if _, found := pods[name]; !found {
// this is a delete
deletes.Pods = append(deletes.Pods, *existing)
}
}
default:
glog.Infof("Received invalid update type: %v", update)
}
s.pods[source] = pods
return adds, updates, deletes
}
func filterInvalidPods(pods []kubelet.Pod, source string) (filtered []*kubelet.Pod) {
names := util.StringSet{}
for i := range pods {
var errors []error
if names.Has(pods[i].Name) {
errors = append(errors, api.ValidationError{api.ErrTypeDuplicate, "Pod.Name", pods[i].Name})
} else {
names.Insert(pods[i].Name)
}
if errs := kubelet.ValidatePod(&pods[i]); len(errs) != 0 {
errors = append(errors, errs...)
}
if len(errors) > 0 {
glog.Warningf("Pod %d from %s failed validation, ignoring: %v", i+1, source, errors)
continue
}
filtered = append(filtered, &pods[i])
}
return
}
// Sync sends a copy of the current state through the update channel
func (s *podStorage) Sync() {
s.updateLock.Lock()
defer s.updateLock.Unlock()
s.updates <- kubelet.PodUpdate{s.MergedState().([]kubelet.Pod), kubelet.SET}
}
// Object implements config.Accessor
func (s *podStorage) MergedState() interface{} {
s.podLock.RLock()
defer s.podLock.RUnlock()
pods := make([]kubelet.Pod, 0)
for source, sourcePods := range s.pods {
for _, podRef := range sourcePods {
pod := *podRef
pod.Namespace = source
pods = append(pods, pod)
}
}
return pods
}

212
pkg/kubelet/config/config_test.go Normal file
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@ -0,0 +1,212 @@
/*
Copyright 2014 Google Inc. 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 config
import (
"reflect"
"testing"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
)
// TODO: remove this
func expectError(t *testing.T, err error) {
if err == nil {
t.Errorf("Expected error, Got %v", err)
}
}
// TODO: remove this
func expectNoError(t *testing.T, err error) {
if err != nil {
t.Errorf("Expected no error, Got %v", err)
}
}
func expectEmptyChannel(t *testing.T, ch <-chan interface{}) {
select {
case update := <-ch:
t.Errorf("Expected no update in channel, Got %v", update)
default:
}
}
type sortedPods []kubelet.Pod
func (s sortedPods) Len() int {
return len(s)
}
func (s sortedPods) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
func (s sortedPods) Less(i, j int) bool {
if s[i].Namespace < s[j].Namespace {
return true
}
return s[i].Name < s[j].Name
}
func CreateValidPod(name, namespace string) kubelet.Pod {
return kubelet.Pod{
Name: name,
Namespace: namespace,
Manifest: api.ContainerManifest{
Version: "v1beta1",
},
}
}
func CreatePodUpdate(op kubelet.PodOperation, pods ...kubelet.Pod) kubelet.PodUpdate {
newPods := make([]kubelet.Pod, len(pods))
for i := range pods {
newPods[i] = pods[i]
}
return kubelet.PodUpdate{newPods, op}
}
func createPodConfigTester(mode PodConfigNotificationMode) (chan<- interface{}, <-chan kubelet.PodUpdate, *PodConfig) {
config := NewPodConfig(mode)
channel := config.Channel("test")
ch := config.Updates()
return channel, ch, config
}
func expectPodUpdate(t *testing.T, ch <-chan kubelet.PodUpdate, expected ...kubelet.PodUpdate) {
for i := range expected {
update := <-ch
if !reflect.DeepEqual(expected[i], update) {
t.Fatalf("Expected %#v, Got %#v", expected[i], update)
}
}
expectNoPodUpdate(t, ch)
}
func expectNoPodUpdate(t *testing.T, ch <-chan kubelet.PodUpdate) {
select {
case update := <-ch:
t.Errorf("Expected no update in channel, Got %#v", update)
default:
}
}
func TestNewPodAdded(t *testing.T) {
channel, ch, config := createPodConfigTester(PodConfigNotificationIncremental)
// see an update
podUpdate := CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", ""))
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", "test")))
config.Sync()
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.SET, CreateValidPod("foo", "test")))
}
func TestInvalidPodFiltered(t *testing.T) {
channel, ch, _ := createPodConfigTester(PodConfigNotificationIncremental)
// see an update
podUpdate := CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", ""))
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", "test")))
// add an invalid update
podUpdate = CreatePodUpdate(kubelet.UPDATE, kubelet.Pod{Name: "foo"})
channel <- podUpdate
expectNoPodUpdate(t, ch)
}
func TestNewPodAddedSnapshotAndUpdates(t *testing.T) {
channel, ch, config := createPodConfigTester(PodConfigNotificationSnapshotAndUpdates)
// see an set
podUpdate := CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", ""))
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.SET, CreateValidPod("foo", "test")))
config.Sync()
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.SET, CreateValidPod("foo", "test")))
// container updates are separated as UPDATE
pod := podUpdate.Pods[0]
pod.Manifest.Containers = []api.Container{{Name: "bar", Image: "test"}}
channel <- CreatePodUpdate(kubelet.ADD, pod)
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.UPDATE, pod))
}
func TestNewPodAddedSnapshot(t *testing.T) {
channel, ch, config := createPodConfigTester(PodConfigNotificationSnapshot)
// see an set
podUpdate := CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", ""))
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.SET, CreateValidPod("foo", "test")))
config.Sync()
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.SET, CreateValidPod("foo", "test")))
// container updates are separated as UPDATE
pod := podUpdate.Pods[0]
pod.Manifest.Containers = []api.Container{{Name: "bar", Image: "test"}}
channel <- CreatePodUpdate(kubelet.ADD, pod)
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.SET, pod))
}
func TestNewPodAddedUpdatedRemoved(t *testing.T) {
channel, ch, _ := createPodConfigTester(PodConfigNotificationIncremental)
// should register an add
podUpdate := CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", ""))
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", "test")))
// should ignore ADDs that are identical
expectNoPodUpdate(t, ch)
// an kubelet.ADD should be converted to kubelet.UPDATE
pod := CreateValidPod("foo", "test")
pod.Manifest.Containers = []api.Container{{Name: "bar", Image: "test"}}
podUpdate = CreatePodUpdate(kubelet.ADD, pod)
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.UPDATE, pod))
podUpdate = CreatePodUpdate(kubelet.REMOVE, kubelet.Pod{Name: "foo"})
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.REMOVE, pod))
}
func TestNewPodAddedUpdatedSet(t *testing.T) {
channel, ch, _ := createPodConfigTester(PodConfigNotificationIncremental)
// should register an add
podUpdate := CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", ""), CreateValidPod("foo2", ""), CreateValidPod("foo3", ""))
channel <- podUpdate
expectPodUpdate(t, ch, CreatePodUpdate(kubelet.ADD, CreateValidPod("foo", "test"), CreateValidPod("foo2", "test"), CreateValidPod("foo3", "test")))
// should ignore ADDs that are identical
expectNoPodUpdate(t, ch)
// should be converted to an kubelet.ADD, kubelet.REMOVE, and kubelet.UPDATE
pod := CreateValidPod("foo2", "test")
pod.Manifest.Containers = []api.Container{{Name: "bar", Image: "test"}}
podUpdate = CreatePodUpdate(kubelet.SET, pod, CreateValidPod("foo3", ""), CreateValidPod("foo4", "test"))
channel <- podUpdate
expectPodUpdate(t, ch,
CreatePodUpdate(kubelet.REMOVE, CreateValidPod("foo", "test")),
CreatePodUpdate(kubelet.ADD, CreateValidPod("foo4", "test")),
CreatePodUpdate(kubelet.UPDATE, pod))
}

140
pkg/kubelet/config/etcd.go Normal file
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@ -0,0 +1,140 @@
/*
Copyright 2014 Google Inc. 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 sied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Reads the pod configuration from etcd using the Kubernetes etcd schema
package config
import (
"fmt"
"path"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
"github.com/GoogleCloudPlatform/kubernetes/pkg/tools"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/coreos/go-etcd/etcd"
"github.com/golang/glog"
"gopkg.in/v1/yaml"
)
func EtcdKeyForHost(hostname string) string {
return path.Join("/", "registry", "hosts", hostname, "kubelet")
}
// TODO(lavalamp): Use a watcher interface instead of the etcd client directly
type SourceEtcd struct {
key string
client tools.EtcdClient
updates chan<- interface{}
waitDuration time.Duration
}
// NewSourceEtcd creates a config source that watches and pulls from a key in etcd
func NewSourceEtcd(key string, client tools.EtcdClient, period time.Duration, updates chan<- interface{}) *SourceEtcd {
config := &SourceEtcd{
key: key,
client: client,
updates: updates,
waitDuration: period,
}
glog.Infof("Watching etcd for %s", key)
go util.Forever(config.run, period)
return config
}
// run loops forever looking for changes to a key in etcd
func (s *SourceEtcd) run() {
index := uint64(0)
for {
lastIndex, err := s.fetchNextState(index)
if err != nil {
if !tools.IsEtcdNotFound(err) {
glog.Errorf("Unable to extract from the response (%s): %%v", s.key, err)
}
return
}
index = lastIndex + 1
}
}
// fetchNextState fetches the key (or waits for a change to a key) and then returns
// the index read. It will watch no longer than s.waitDuration and then return
func (s *SourceEtcd) fetchNextState(fromIndex uint64) (lastIndex uint64, err error) {
var response *etcd.Response
if fromIndex == 0 {
response, err = s.client.Get(s.key, true, false)
} else {
response, err = s.client.Watch(s.key, fromIndex, false, nil, stopChannel(s.waitDuration))
if tools.IsEtcdWatchStoppedByUser(err) {
return fromIndex, nil
}
}
if err != nil {
return 0, err
}
pods, err := responseToPods(response)
if err != nil {
glog.Infof("Response was in error: %#v", response)
return 0, fmt.Errorf("error parsing response: %#v", err)
}
glog.Infof("Got state from etcd: %+v", pods)
s.updates <- kubelet.PodUpdate{pods, kubelet.SET}
return response.Node.ModifiedIndex, nil
}
// responseToPods takes an etcd Response object, and turns it into a structured list of containers.
// It returns a list of containers, or an error if one occurs.
func responseToPods(response *etcd.Response) ([]kubelet.Pod, error) {
pods := []kubelet.Pod{}
if response.Node == nil || len(response.Node.Value) == 0 {
return pods, fmt.Errorf("no nodes field: %v", response)
}
manifests := []api.ContainerManifest{}
if err := yaml.Unmarshal([]byte(response.Node.Value), &manifests); err != nil {
return pods, fmt.Errorf("could not unmarshal manifests: %v", err)
}
for i, manifest := range manifests {
name := manifest.ID
if name == "" {
name = fmt.Sprintf("_%d", i+1)
}
pods = append(pods, kubelet.Pod{Name: name, Manifest: manifest})
}
return pods, nil
}
// stopChannel creates a channel that is closed after a duration for use with etcd client API
func stopChannel(until time.Duration) chan bool {
stop := make(chan bool)
go func() {
select {
case <-time.After(until):
}
stop <- true
close(stop)
}()
return stop
}

147
pkg/kubelet/config/etcd_test.go Normal file
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@ -0,0 +1,147 @@
/*
Copyright 2014 Google Inc. 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 config
import (
"reflect"
"testing"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
"github.com/GoogleCloudPlatform/kubernetes/pkg/tools"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/coreos/go-etcd/etcd"
)
// TODO(lavalamp): Use the etcd watcher from the tools package, and make sure all test cases here are tested there.
func TestGetEtcdData(t *testing.T) {
fakeClient := tools.MakeFakeEtcdClient(t)
ch := make(chan interface{})
fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
R: &etcd.Response{
Node: &etcd.Node{
Value: util.MakeJSONString([]api.ContainerManifest{api.ContainerManifest{ID: "foo"}}),
ModifiedIndex: 1,
},
},
E: nil,
}
NewSourceEtcd("/registry/hosts/machine/kubelet", fakeClient, time.Millisecond, ch)
//TODO: update FakeEtcdClient.Watch to handle receiver=nil with a given index
//returns an infinite stream of updates
for i := 0; i < 2; i++ {
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET, kubelet.Pod{Name: "foo", Manifest: api.ContainerManifest{ID: "foo"}})
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected %#v, Got %#v", expected, update)
}
}
}
func TestGetEtcdNoData(t *testing.T) {
fakeClient := tools.MakeFakeEtcdClient(t)
ch := make(chan interface{}, 1)
fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
R: &etcd.Response{},
E: nil,
}
c := SourceEtcd{"/registry/hosts/machine/kubelet", fakeClient, ch, time.Millisecond}
_, err := c.fetchNextState(0)
expectError(t, err)
expectEmptyChannel(t, ch)
}
func TestGetEtcd(t *testing.T) {
fakeClient := tools.MakeFakeEtcdClient(t)
ch := make(chan interface{}, 1)
fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
R: &etcd.Response{
Node: &etcd.Node{
Value: util.MakeJSONString([]api.ContainerManifest{api.ContainerManifest{ID: "foo"}}),
ModifiedIndex: 1,
},
},
E: nil,
}
c := SourceEtcd{"/registry/hosts/machine/kubelet", fakeClient, ch, time.Millisecond}
lastIndex, err := c.fetchNextState(0)
expectNoError(t, err)
if lastIndex != 1 {
t.Errorf("Expected %#v, Got %#v", 1, lastIndex)
}
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET, kubelet.Pod{Name: "foo", Manifest: api.ContainerManifest{ID: "foo"}})
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected %#v, Got %#v", expected, update)
}
}
func TestWatchEtcd(t *testing.T) {
fakeClient := tools.MakeFakeEtcdClient(t)
ch := make(chan interface{}, 1)
fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
R: &etcd.Response{
Node: &etcd.Node{
Value: util.MakeJSONString([]api.Container{}),
ModifiedIndex: 2,
},
},
E: nil,
}
c := SourceEtcd{"/registry/hosts/machine/kubelet", fakeClient, ch, time.Millisecond}
lastIndex, err := c.fetchNextState(1)
expectNoError(t, err)
if lastIndex != 2 {
t.Errorf("Expected %d, Got %d", 1, lastIndex)
}
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET)
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected %#v, Got %#v", expected, update)
}
}
func TestGetEtcdNotFound(t *testing.T) {
fakeClient := tools.MakeFakeEtcdClient(t)
ch := make(chan interface{}, 1)
fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
R: &etcd.Response{},
E: tools.EtcdErrorNotFound,
}
c := SourceEtcd{"/registry/hosts/machine/kubelet", fakeClient, ch, time.Millisecond}
_, err := c.fetchNextState(0)
expectError(t, err)
expectEmptyChannel(t, ch)
}
func TestGetEtcdError(t *testing.T) {
fakeClient := tools.MakeFakeEtcdClient(t)
ch := make(chan interface{}, 1)
fakeClient.Data["/registry/hosts/machine/kubelet"] = tools.EtcdResponseWithError{
R: &etcd.Response{},
E: &etcd.EtcdError{
ErrorCode: 200, // non not found error
},
}
c := SourceEtcd{"/registry/hosts/machine/kubelet", fakeClient, ch, time.Millisecond}
_, err := c.fetchNextState(0)
expectError(t, err)
expectEmptyChannel(t, ch)
}

149
pkg/kubelet/config/file.go Normal file
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/*
Copyright 2014 Google Inc. 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 sied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Reads the pod configuration from file or a directory of files
package config
import (
"crypto/sha1"
"encoding/base64"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sort"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/golang/glog"
"gopkg.in/v1/yaml"
)
type SourceFile struct {
path string
updates chan<- interface{}
}
func NewSourceFile(path string, period time.Duration, updates chan<- interface{}) *SourceFile {
config := &SourceFile{
path: path,
updates: updates,
}
glog.Infof("Watching file %s", path)
go util.Forever(config.run, period)
return config
}
func (s *SourceFile) run() {
if err := s.extractFromPath(); err != nil {
glog.Errorf("Unable to read config file: %s", err)
}
}
func (s *SourceFile) extractFromPath() error {
path := s.path
statInfo, err := os.Stat(path)
if err != nil {
if !os.IsNotExist(err) {
return fmt.Errorf("unable to access path: %s", err)
}
return fmt.Errorf("path does not exist: %s", path)
}
switch {
case statInfo.Mode().IsDir():
pods, err := extractFromDir(path)
if err != nil {
return err
}
s.updates <- kubelet.PodUpdate{pods, kubelet.SET}
case statInfo.Mode().IsRegular():
pod, err := extractFromFile(path)
if err != nil {
return err
}
s.updates <- kubelet.PodUpdate{[]kubelet.Pod{pod}, kubelet.SET}
default:
return fmt.Errorf("path is not a directory or file")
}
return nil
}
func extractFromDir(name string) ([]kubelet.Pod, error) {
pods := []kubelet.Pod{}
files, err := filepath.Glob(filepath.Join(name, "[^.]*"))
if err != nil {
return pods, err
}
sort.Strings(files)
for _, file := range files {
pod, err := extractFromFile(file)
if err != nil {
return []kubelet.Pod{}, err
}
pods = append(pods, pod)
}
return pods, nil
}
func extractFromFile(name string) (kubelet.Pod, error) {
var pod kubelet.Pod
file, err := os.Open(name)
if err != nil {
return pod, err
}
defer file.Close()
data, err := ioutil.ReadAll(file)
if err != nil {
glog.Errorf("Couldn't read from file: %v", err)
return pod, err
}
if err := yaml.Unmarshal(data, &pod.Manifest); err != nil {
return pod, fmt.Errorf("could not unmarshal manifest: %v", err)
}
podName := pod.Manifest.ID
if podName == "" {
podName = simpleSubdomainSafeHash(name)
}
pod.Name = podName
return pod, nil
}
var simpleSubdomainSafeEncoding = base64.NewEncoding("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345678900")
// simpleSubdomainSafeHash generates a compact hash of the input that uses characters
// only in the range a-zA-Z0-9, making it suitable for DNS subdomain labels
func simpleSubdomainSafeHash(s string) string {
hasher := sha1.New()
hasher.Write([]byte(s))
sha := simpleSubdomainSafeEncoding.EncodeToString(hasher.Sum(nil))
if len(sha) > 20 {
sha = sha[:20]
}
return sha
}

211
pkg/kubelet/config/file_test.go Normal file
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@ -0,0 +1,211 @@
/*
Copyright 2014 Google Inc. 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 config
import (
"encoding/json"
"io/ioutil"
"os"
"reflect"
"sort"
"testing"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
"gopkg.in/v1/yaml"
)
func TestExtractFromNonExistentFile(t *testing.T) {
ch := make(chan interface{}, 1)
c := SourceFile{"/some/fake/file", ch}
err := c.extractFromPath()
expectError(t, err)
}
func TestUpdateOnNonExistentFile(t *testing.T) {
ch := make(chan interface{})
NewSourceFile("random_non_existent_path", time.Millisecond, ch)
select {
case got := <-ch:
t.Errorf("Expected no update, Got %#v", got)
case <-time.After(2 * time.Millisecond):
}
}
func writeTestFile(t *testing.T, dir, name string, contents string) *os.File {
file, err := ioutil.TempFile(os.TempDir(), "test_pod_config")
if err != nil {
t.Fatalf("Unable to create test file %#v", err)
}
file.Close()
if err := ioutil.WriteFile(file.Name(), []byte(contents), 0555); err != nil {
t.Fatalf("Unable to write test file %#v", err)
}
return file
}
func TestReadFromFile(t *testing.T) {
file := writeTestFile(t, os.TempDir(), "test_pod_config", "version: v1beta1\nid: test\ncontainers:\n- image: test/image")
defer os.Remove(file.Name())
ch := make(chan interface{})
NewSourceFile(file.Name(), time.Millisecond, ch)
select {
case got := <-ch:
update := got.(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET, kubelet.Pod{
Name: "test",
Manifest: api.ContainerManifest{
ID: "test",
Version: "v1beta1",
Containers: []api.Container{api.Container{
Image: "test/image"},
},
},
})
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected %#v, Got %#v", expected, update)
}
case <-time.After(2 * time.Millisecond):
t.Errorf("Expected update, timeout instead")
}
}
func TestExtractFromBadDataFile(t *testing.T) {
file := writeTestFile(t, os.TempDir(), "test_pod_config", string([]byte{1, 2, 3}))
defer os.Remove(file.Name())
ch := make(chan interface{}, 1)
c := SourceFile{file.Name(), ch}
err := c.extractFromPath()
expectError(t, err)
expectEmptyChannel(t, ch)
}
func TestExtractFromValidDataFile(t *testing.T) {
manifest := api.ContainerManifest{ID: ""}
text, err := json.Marshal(manifest)
expectNoError(t, err)
file := writeTestFile(t, os.TempDir(), "test_pod_config", string(text))
defer os.Remove(file.Name())
ch := make(chan interface{}, 1)
c := SourceFile{file.Name(), ch}
err = c.extractFromPath()
expectNoError(t, err)
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET, kubelet.Pod{Name: simpleSubdomainSafeHash(file.Name()), Manifest: manifest})
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected %#v, Got %#v", expected, update)
}
}
func TestExtractFromEmptyDir(t *testing.T) {
dirName, err := ioutil.TempDir("", "foo")
expectNoError(t, err)
defer os.RemoveAll(dirName)
ch := make(chan interface{}, 1)
c := SourceFile{dirName, ch}
err = c.extractFromPath()
expectNoError(t, err)
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET)
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected %#v, Got %#v", expected, update)
}
}
func TestExtractFromDir(t *testing.T) {
manifests := []api.ContainerManifest{
{ID: "", Containers: []api.Container{{Image: "foo"}}},
{ID: "", Containers: []api.Container{{Image: "bar"}}},
}
files := make([]*os.File, len(manifests))
dirName, err := ioutil.TempDir("", "foo")
expectNoError(t, err)
for i, manifest := range manifests {
data, err := json.Marshal(manifest)
expectNoError(t, err)
file, err := ioutil.TempFile(dirName, manifest.ID)
expectNoError(t, err)
name := file.Name()
expectNoError(t, file.Close())
ioutil.WriteFile(name, data, 0755)
files[i] = file
}
ch := make(chan interface{}, 1)
c := SourceFile{dirName, ch}
err = c.extractFromPath()
expectNoError(t, err)
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(
kubelet.SET,
kubelet.Pod{Name: simpleSubdomainSafeHash(files[0].Name()), Manifest: manifests[0]},
kubelet.Pod{Name: simpleSubdomainSafeHash(files[1].Name()), Manifest: manifests[1]},
)
sort.Sort(sortedPods(update.Pods))
sort.Sort(sortedPods(expected.Pods))
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected %#v, Got %#v", expected, update)
}
}
// These are used for testing extract json (below)
type TestData struct {
Value string
Number int
}
type TestObject struct {
Name string
Data TestData
}
func verifyStringEquals(t *testing.T, actual, expected string) {
if actual != expected {
t.Errorf("Verification failed. Expected: %s, Found %s", expected, actual)
}
}
func verifyIntEquals(t *testing.T, actual, expected int) {
if actual != expected {
t.Errorf("Verification failed. Expected: %d, Found %d", expected, actual)
}
}
func TestExtractJSON(t *testing.T) {
obj := TestObject{}
data := `{ "name": "foo", "data": { "value": "bar", "number": 10 } }`
if err := yaml.Unmarshal([]byte(data), &obj); err != nil {
t.Fatalf("Could not unmarshal JSON: %v", err)
}
verifyStringEquals(t, obj.Name, "foo")
verifyStringEquals(t, obj.Data.Value, "bar")
verifyIntEquals(t, obj.Data.Number, 10)
}

117
pkg/kubelet/config/http.go Normal file
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@ -0,0 +1,117 @@
/*
Copyright 2014 Google Inc. 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 sied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Reads the pod configuration from an HTTP GET response
package config
import (
"fmt"
"io/ioutil"
"net/http"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/golang/glog"
"gopkg.in/v1/yaml"
)
type SourceURL struct {
url string
updates chan<- interface{}
}
func NewSourceURL(url string, period time.Duration, updates chan<- interface{}) *SourceURL {
config := &SourceURL{
url: url,
updates: updates,
}
glog.Infof("Watching URL %s", url)
go util.Forever(config.run, period)
return config
}
func (s *SourceURL) run() {
if err := s.extractFromURL(); err != nil {
glog.Errorf("Failed to read URL: %s", err)
}
}
func (s *SourceURL) extractFromURL() error {
resp, err := http.Get(s.url)
if err != nil {
return err
}
defer resp.Body.Close()
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
if len(data) == 0 {
return fmt.Errorf("zero-length data received from %v", s.url)
}
// First try as if it's a single manifest
var pod kubelet.Pod
singleErr := yaml.Unmarshal(data, &pod.Manifest)
// TODO: replace with validation
if singleErr == nil && pod.Manifest.Version == "" {
// If data is a []ContainerManifest, trying to put it into a ContainerManifest
// will not give an error but also won't set any of the fields.
// Our docs say that the version field is mandatory, so using that to judge wether
// this was actually successful.
singleErr = fmt.Errorf("got blank version field")
}
if singleErr == nil {
name := pod.Manifest.ID
if name == "" {
name = "1"
}
pod.Name = name
s.updates <- kubelet.PodUpdate{[]kubelet.Pod{pod}, kubelet.SET}
return nil
}
// That didn't work, so try an array of manifests.
var manifests []api.ContainerManifest
multiErr := yaml.Unmarshal(data, &manifests)
// We're not sure if the person reading the logs is going to care about the single or
// multiple manifest unmarshalling attempt, so we need to put both in the logs, as is
// done at the end. Hence not returning early here.
if multiErr == nil && len(manifests) > 0 && manifests[0].Version == "" {
multiErr = fmt.Errorf("got blank version field")
}
if multiErr == nil {
pods := []kubelet.Pod{}
for i := range manifests {
pod := kubelet.Pod{Manifest: manifests[i]}
name := pod.Manifest.ID
if name == "" {
name = fmt.Sprintf("%d", i+1)
}
pod.Name = name
pods = append(pods, pod)
}
s.updates <- kubelet.PodUpdate{pods, kubelet.SET}
return nil
}
return fmt.Errorf("%v: received '%v', but couldn't parse as a "+
"single manifest (%v: %+v) or as multiple manifests (%v: %+v).\n",
s.url, string(data), singleErr, pod.Manifest, multiErr, manifests)
}

124
pkg/kubelet/config/http_test.go Normal file
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@ -0,0 +1,124 @@
/*
Copyright 2014 Google Inc. 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 config
import (
"encoding/json"
"net/http/httptest"
"reflect"
"testing"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
)
func TestURLErrorNotExistNoUpdate(t *testing.T) {
ch := make(chan interface{})
NewSourceURL("http://localhost:49575/_not_found_", time.Millisecond, ch)
select {
case got := <-ch:
t.Errorf("Expected no update, Got %#v", got)
case <-time.After(2 * time.Millisecond):
}
}
func TestExtractFromHttpBadness(t *testing.T) {
ch := make(chan interface{}, 1)
c := SourceURL{"http://localhost:49575/_not_found_", ch}
err := c.extractFromURL()
expectError(t, err)
expectEmptyChannel(t, ch)
}
func TestExtractFromHttpSingle(t *testing.T) {
manifests := []api.ContainerManifest{
{Version: "v1beta1", ID: "foo"},
}
// Taking a single-manifest from a URL allows kubelet to be used
// in the implementation of google's container VM image.
data, err := json.Marshal(manifests[0])
fakeHandler := util.FakeHandler{
StatusCode: 200,
ResponseBody: string(data),
}
testServer := httptest.NewServer(&fakeHandler)
ch := make(chan interface{}, 1)
c := SourceURL{testServer.URL, ch}
err = c.extractFromURL()
expectNoError(t, err)
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET, kubelet.Pod{Name: "foo", Manifest: manifests[0]})
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected: %#v, Got: %#v", expected, update)
}
}
func TestExtractFromHttpMultiple(t *testing.T) {
manifests := []api.ContainerManifest{
{Version: "v1beta1", ID: ""},
{Version: "v1beta1", ID: "bar"},
}
data, err := json.Marshal(manifests)
if err != nil {
t.Fatalf("Some weird json problem: %v", err)
}
fakeHandler := util.FakeHandler{
StatusCode: 200,
ResponseBody: string(data),
}
testServer := httptest.NewServer(&fakeHandler)
ch := make(chan interface{}, 1)
c := SourceURL{testServer.URL, ch}
err = c.extractFromURL()
expectNoError(t, err)
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET, kubelet.Pod{Name: "1", Manifest: manifests[0]}, kubelet.Pod{Name: "bar", Manifest: manifests[1]})
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected: %#v, Got: %#v", expected, update)
}
}
func TestExtractFromHttpEmptyArray(t *testing.T) {
manifests := []api.ContainerManifest{}
data, err := json.Marshal(manifests)
if err != nil {
t.Fatalf("Some weird json problem: %v", err)
}
fakeHandler := util.FakeHandler{
StatusCode: 200,
ResponseBody: string(data),
}
testServer := httptest.NewServer(&fakeHandler)
ch := make(chan interface{}, 1)
c := SourceURL{testServer.URL, ch}
err = c.extractFromURL()
expectNoError(t, err)
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET)
if !reflect.DeepEqual(expected, update) {
t.Errorf("Expected: %#v, Got: %#v", expected, update)
}
}

60
pkg/kubelet/types.go Normal file
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@ -0,0 +1,60 @@
/*
Copyright 2014 Google Inc. 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 kubelet
import (
"fmt"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
)
// Pod represents the structure of a pod on the Kubelet, distinct from the apiserver
// representation of a Pod.
type Pod struct {
Namespace string
Name string
Manifest api.ContainerManifest
}
// PodOperation defines what changes will be made on a pod configuration.
type PodOperation int
const (
// This is the current pod configuration
SET PodOperation = iota
// Pods with the given ids are new to this source
ADD
// Pods with the given ids have been removed from this source
REMOVE
// Pods with the given ids have been updated in this source
UPDATE
)
// PodUpdate defines an operation sent on the channel. You can add or remove single services by
// sending an array of size one and Op == ADD|REMOVE (with REMOVE, only the ID is required).
// For setting the state of the system to a given state for this source configuration, set
// Pods as desired and Op to SET, which will reset the system state to that specified in this
// operation for this source channel. To remove all pods, set Pods to empty array and Op to SET.
type PodUpdate struct {
Pods []Pod
Op PodOperation
}
//GetPodFullName returns a name that full identifies a pod across all config sources.
func GetPodFullName(pod *Pod) string {
return fmt.Sprintf("%s.%s", pod.Name, pod.Namespace)
}

36
pkg/kubelet/validation.go Normal file
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@ -0,0 +1,36 @@
/*
Copyright 2014 Google Inc. 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 kubelet
import (
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
)
func makeInvalidError(field string, value interface{}) api.ValidationError {
return api.ValidationError{api.ErrTypeInvalid, field, value}
}
func ValidatePod(pod *Pod) (errors []error) {
if !util.IsDNSSubdomain(pod.Name) {
errors = append(errors, makeInvalidError("Pod.Name", pod.Name))
}
if errs := api.ValidateManifest(&pod.Manifest); len(errs) != 0 {
errors = append(errors, errs...)
}
return errors
}

42
pkg/kubelet/validation_test.go Normal file
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@ -0,0 +1,42 @@
/*
Copyright 2014 Google Inc. 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 kubelet_test
import (
"strings"
"testing"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
. "github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet"
)
func TestValidatePodNoName(t *testing.T) {
errorCases := map[string]Pod{
// manifest is tested in api/validation_test.go, ensure it is invoked
"empty version": {Name: "test", Manifest: api.ContainerManifest{Version: "", ID: "abc"}},
// Name
"zero-length name": {Name: "", Manifest: api.ContainerManifest{Version: "v1beta1"}},
"name > 255 characters": {Name: strings.Repeat("a", 256), Manifest: api.ContainerManifest{Version: "v1beta1"}},
"name not a DNS subdomain": {Name: "a.b.c.", Manifest: api.ContainerManifest{Version: "v1beta1"}},
}
for k, v := range errorCases {
if errs := ValidatePod(&v); len(errs) == 0 {
t.Errorf("expected failure for %s", k)
}
}
}

5
pkg/tools/etcd_tools.go
View File

@ -70,6 +70,11 @@ func IsEtcdConflict(err error) bool {
return isEtcdErrorNum(err, 101)
}
// IsEtcdWatchStoppedByUser returns true iff err is a client triggered stop.
func IsEtcdWatchStoppedByUser(err error) bool {
return etcd.ErrWatchStoppedByUser == err
}
// Returns true iff err is an etcd error, whose errorCode matches errorCode
func isEtcdErrorNum(err error, errorCode int) bool {
etcdError, ok := err.(*etcd.EtcdError)

4
pkg/tools/fake_etcd_client.go
View File

@ -124,6 +124,10 @@ func (f *FakeEtcdClient) Watch(prefix string, waitIndex uint64, recursive bool,
defer close(injectedError)
f.WatchInjectError = injectedError
if receiver == nil {
return f.Get(prefix, false, recursive)
}
f.watchCompletedChan <- true
select {
case <-stop: