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Merge pull request #569 from smarterclayton/fix_bad_watch_in_etcd

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Kubelet etcd watch skipping indices
This commit is contained in:
Daniel Smith 2014-07-22 18:23:00 -07:00
commit 0ef600c8cd
2 changed files with 10 additions and 10 deletions
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12
pkg/kubelet/config/etcd.go
View File

@ -62,20 +62,20 @@ func NewSourceEtcd(key string, client tools.EtcdClient, period time.Duration, up
func (s *SourceEtcd) run() {
index := uint64(0)
for {
lastIndex, err := s.fetchNextState(index)
nextIndex, 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
index = nextIndex
}
}
// 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) {
// the nextIndex to read. It will watch no longer than s.waitDuration and then return
func (s *SourceEtcd) fetchNextState(fromIndex uint64) (nextIndex uint64, err error) {
var response *etcd.Response
if fromIndex == 0 {
@ -87,7 +87,7 @@ func (s *SourceEtcd) fetchNextState(fromIndex uint64) (lastIndex uint64, err err
}
}
if err != nil {
return 0, err
return fromIndex, err
}
pods, err := responseToPods(response)
@ -99,7 +99,7 @@ func (s *SourceEtcd) fetchNextState(fromIndex uint64) (lastIndex uint64, err err
glog.Infof("Got state from etcd: %+v", pods)
s.updates <- kubelet.PodUpdate{pods, kubelet.SET}
return response.Node.ModifiedIndex, nil
return response.Node.ModifiedIndex + 1, nil
}
// responseToPods takes an etcd Response object, and turns it into a structured list of containers.

8
pkg/kubelet/config/etcd_test.go
View File

@ -83,8 +83,8 @@ func TestGetEtcd(t *testing.T) {
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)
if lastIndex != 2 {
t.Errorf("Expected %#v, Got %#v", 2, lastIndex)
}
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET, kubelet.Pod{Name: "foo", Manifest: api.ContainerManifest{ID: "foo"}})
@ -108,8 +108,8 @@ func TestWatchEtcd(t *testing.T) {
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)
if lastIndex != 3 {
t.Errorf("Expected %d, Got %d", 3, lastIndex)
}
update := (<-ch).(kubelet.PodUpdate)
expected := CreatePodUpdate(kubelet.SET)