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events.go
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events.go
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// Copyright 2019 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package provider
import (
"context"
core "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/client-go/informers"
"github.com/juju/juju/caas/kubernetes/provider/resources"
"github.com/juju/juju/core/watcher"
)
// Constants below are copied from "k8s.io/kubernetes/pkg/kubelet/events"
// to avoid introducing the huge dependency.
// Remove them once k8s.io/kubernetes added as a dependency.
const (
// Container event reason list
CreatedContainer = "Created"
StartedContainer = "Started"
FailedToCreateContainer = "Failed"
FailedToStartContainer = "Failed"
KillingContainer = "Killing"
PreemptContainer = "Preempting"
BackOffStartContainer = "BackOff"
ExceededGracePeriod = "ExceededGracePeriod"
// Pod event reason list
FailedToKillPod = "FailedKillPod"
FailedToCreatePodContainer = "FailedCreatePodContainer"
FailedToMakePodDataDirectories = "Failed"
NetworkNotReady = "NetworkNotReady"
// Image event reason list
PullingImage = "Pulling"
PulledImage = "Pulled"
FailedToPullImage = "Failed"
FailedToInspectImage = "InspectFailed"
ErrImageNeverPullPolicy = "ErrImageNeverPull"
BackOffPullImage = "BackOff"
)
func (k *kubernetesClient) getEvents(objName string, objKind string) ([]core.Event, error) {
if k.namespace == "" {
return nil, errNoNamespace
}
return resources.ListEventsForObject(context.TODO(), k.client(), k.namespace, objName, objKind)
}
func (k *kubernetesClient) watchEvents(objName string, objKind string) (watcher.NotifyWatcher, error) {
if k.namespace == "" {
return nil, errNoNamespace
}
factory := informers.NewSharedInformerFactoryWithOptions(k.client(), 0,
informers.WithNamespace(k.namespace),
informers.WithTweakListOptions(func(o *metav1.ListOptions) {
o.FieldSelector = fields.AndSelectors(
fields.OneTermEqualSelector("involvedObject.name", objName),
fields.OneTermEqualSelector("involvedObject.kind", objKind),
).String()
}),
)
return k.newWatcher(factory.Core().V1().Events().Informer(), objName, k.clock)
}