// WatchControllers begins watching for new, changed, or deleted controllers.
func (r *Registry) WatchControllers(ctx api.Context, label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
if !field.Empty() {
return nil, fmt.Errorf("field selectors are not supported on replication controllers")
}
version, err := tools.ParseWatchResourceVersion(resourceVersion, "replicationControllers")
if err != nil {
return nil, err
}
key := makeControllerListKey(ctx)
return r.WatchList(key, version, func(obj runtime.Object) bool {
controller, ok := obj.(*api.ReplicationController)
if !ok {
// Must be an error: return true to propagate to upper level.
return true
}
match := label.Matches(labels.Set(controller.Labels))
if match {
pods, err := r.pods.ListPods(ctx, labels.Set(controller.Spec.Selector).AsSelector())
if err != nil {
glog.Warningf("Error listing pods: %v", err)
// No object that's useable so drop it on the floor
return false
}
if pods == nil {
glog.Warningf("Pods list is nil. This should never happen...")
// No object that's useable so drop it on the floor
return false
}
controller.Status.Replicas = len(pods.Items)
}
return match
})
}
// WatchPredicate starts a watch for the items that m matches.
func (e *Etcd) WatchPredicate(ctx api.Context, m generic.Matcher, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
filterFunc := func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
if err != nil {
glog.Errorf("unable to match watch: %v", err)
return false
}
if matches && e.Decorator != nil {
if err := e.Decorator(obj); err != nil {
glog.Errorf("unable to decorate watch: %v", err)
return false
}
}
return matches
}
if name, ok := m.MatchesSingle(); ok {
key, err := e.KeyFunc(ctx, name)
if err != nil {
return nil, err
}
return e.Helper.Watch(key, version, filterFunc)
}
return e.Helper.WatchList(e.KeyRootFunc(ctx), version, filterFunc)
}
// WatchControllers begins watching for new, changed, or deleted controllers.
func (r *Registry) WatchControllers(ctx api.Context, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, "replicationControllers")
if err != nil {
return nil, err
}
key := makeControllerListKey(ctx)
return r.WatchList(key, version, tools.Everything)
}
// Watch starts a watch for the items that m matches.
// TODO: Detect if m references a single object instead of a list.
func (e *Etcd) Watch(ctx api.Context, m generic.Matcher, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, e.EndpointName)
if err != nil {
return nil, err
}
return e.Helper.WatchList(e.KeyRootFunc(ctx), version, func(obj runtime.Object) bool {
matches, err := m.Matches(obj)
return err == nil && matches
})
}
func (r *Registry) WatchMinions(ctx api.Context, label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, "node")
if err != nil {
return nil, err
}
key := makeNodeListKey()
return r.WatchList(key, version, func(obj runtime.Object) bool {
minionObj, ok := obj.(*api.Node)
if !ok {
// Must be an error: return true to propagate to upper level.
return true
}
// TODO: Add support for filtering based on field, once NodeStatus is defined.
return label.Matches(labels.Set(minionObj.Labels))
})
}
// WatchPods begins watching for new, changed, or deleted pods.
func (r *Registry) WatchPods(ctx api.Context, label, field labels.Selector, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, "pod")
if err != nil {
return nil, err
}
key := makePodListKey(ctx)
return r.WatchList(key, version, func(obj runtime.Object) bool {
podObj, ok := obj.(*api.Pod)
if !ok {
// Must be an error: return true to propagate to upper level.
return true
}
fields := pod.PodToSelectableFields(podObj)
return label.Matches(labels.Set(podObj.Labels)) && field.Matches(fields)
})
}
// WatchPods begins watching for new, changed, or deleted pods.
func (r *Registry) WatchPods(ctx api.Context, resourceVersion string, filter func(*api.Pod) bool) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, "pod")
if err != nil {
return nil, err
}
key := makePodListKey(ctx)
return r.WatchList(key, version, func(obj runtime.Object) bool {
switch t := obj.(type) {
case *api.Pod:
return filter(t)
default:
// Must be an error
return true
}
})
}
// WatchBuildConfigs begins watching for new, changed, or deleted BuildConfigs.
func (r *Etcd) WatchBuildConfigs(ctx kapi.Context, label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, "buildConfig")
if err != nil {
return nil, err
}
return r.WatchList(makeBuildConfigListKey(ctx), version, func(obj runtime.Object) bool {
buildConfig, ok := obj.(*api.BuildConfig)
if !ok {
glog.Errorf("Unexpected object during %s/%s BuildConfig watch: %#v", buildConfig.Namespace, buildConfig.Name, obj)
return false
}
fields := labels.Set{
"metadata.name": buildConfig.Name,
}
return label.Matches(labels.Set(buildConfig.Labels)) && field.Matches(fields)
})
}
// WatchEndpoints begins watching for new, changed, or deleted endpoint configurations.
func (r *Registry) WatchEndpoints(ctx api.Context, label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, "endpoints")
if err != nil {
return nil, err
}
if !label.Empty() {
return nil, fmt.Errorf("label selectors are not supported on endpoints")
}
if value, found := field.RequiresExactMatch("name"); found {
key, err := makeServiceEndpointsKey(ctx, value)
if err != nil {
return nil, err
}
return r.Watch(key, version), nil
}
if field.Empty() {
return r.WatchList(makeServiceEndpointsListKey(ctx), version, tools.Everything)
}
return nil, fmt.Errorf("only the 'ID' and default (everything) field selectors are supported")
}
// WatchBuilds begins watching for new, changed, or deleted Builds.
func (r *Etcd) WatchBuilds(ctx kapi.Context, label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
version, err := tools.ParseWatchResourceVersion(resourceVersion, "build")
if err != nil {
return nil, err
}
return r.WatchList(makeBuildListKey(ctx), version, func(obj runtime.Object) bool {
build, ok := obj.(*api.Build)
setDuration(build)
if !ok {
glog.Errorf("Unexpected object during build watch: %#v", obj)
return false
}
fields := labels.Set{
"metadata.name": build.Name,
"status": string(build.Status),
"podName": buildutil.GetBuildPodName(build),
}
return label.Matches(labels.Set(build.Labels)) && field.Matches(fields)
})
}
// WatchControllers begins watching for new, changed, or deleted controllers.
func (r *Registry) WatchControllers(ctx api.Context, label, field labels.Selector, resourceVersion string) (watch.Interface, error) {
if !field.Empty() {
return nil, fmt.Errorf("field selectors are not supported on replication controllers")
}
version, err := tools.ParseWatchResourceVersion(resourceVersion, "replicationControllers")
if err != nil {
return nil, err
}
key := makeControllerListKey(ctx)
return r.WatchList(key, version, func(obj runtime.Object) bool {
controller, ok := obj.(*api.ReplicationController)
if !ok {
// Must be an error: return true to propagate to upper level.
return true
}
match := label.Matches(labels.Set(controller.Labels))
if match {
pods, _ := r.ListPods(ctx, labels.Set(controller.Spec.Selector).AsSelector())
controller.Status.Replicas = len(pods.Items)
}
return match
})
}
// WatchRoutes begins watching for new, changed, or deleted route configurations.
func (registry *Etcd) WatchRoutes(ctx kapi.Context, label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error) {
if !label.Empty() {
return nil, fmt.Errorf("label selectors are not supported on routes yet")
}
version, err := tools.ParseWatchResourceVersion(resourceVersion, "pod")
if err != nil {
return nil, err
}
if value, found := field.RequiresExactMatch("ID"); found {
key, err := makeRouteKey(ctx, value)
if err != nil {
return nil, err
}
return registry.Watch(key, version, tools.Everything)
}
if field.Empty() {
key := kubeetcd.MakeEtcdListKey(ctx, RoutePath)
return registry.WatchList(key, version, tools.Everything)
}
return nil, fmt.Errorf("only the 'ID' and default (everything) field selectors are supported")
}