/
daemonset.go
119 lines (108 loc) · 3.63 KB
/
daemonset.go
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// Copyright 2020 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package provider
import (
"context"
"github.com/juju/errors"
apps "k8s.io/api/apps/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"github.com/juju/juju/caas/kubernetes/provider/constants"
"github.com/juju/juju/caas/kubernetes/provider/utils"
)
func (k *kubernetesClient) ensureDaemonSet(spec *apps.DaemonSet) (func(), error) {
cleanUp := func() {}
out, err := k.createDaemonSet(spec)
if err == nil {
logger.Debugf("daemon set %q created", out.GetName())
cleanUp = func() { _ = k.deleteDaemonSet(out.GetName(), out.GetUID()) }
return cleanUp, nil
}
if !errors.IsAlreadyExists(err) {
return cleanUp, errors.Trace(err)
}
_, err = k.listDaemonSets(spec.GetLabels())
if err != nil {
if errors.IsNotFound(err) {
// spec.Name is already used for an existing daemon set.
return cleanUp, errors.AlreadyExistsf("daemon set %q", spec.GetName())
}
return cleanUp, errors.Trace(err)
}
_, err = k.updateDaemonSet(spec)
logger.Debugf("updating daemon set %q", spec.GetName())
return cleanUp, errors.Trace(err)
}
func (k *kubernetesClient) createDaemonSet(spec *apps.DaemonSet) (*apps.DaemonSet, error) {
if k.namespace == "" {
return nil, errNoNamespace
}
utils.PurifyResource(spec)
out, err := k.client().AppsV1().DaemonSets(k.namespace).Create(context.TODO(), spec, v1.CreateOptions{})
if k8serrors.IsAlreadyExists(err) {
return nil, errors.AlreadyExistsf("daemon set %q", spec.GetName())
}
return out, errors.Trace(err)
}
func (k *kubernetesClient) getDaemonSet(name string) (*apps.DaemonSet, error) {
if k.namespace == "" {
return nil, errNoNamespace
}
out, err := k.client().AppsV1().DaemonSets(k.namespace).Get(context.TODO(), name, v1.GetOptions{})
if k8serrors.IsNotFound(err) {
return nil, errors.NotFoundf("daemon set %q", name)
}
return out, errors.Trace(err)
}
func (k *kubernetesClient) updateDaemonSet(spec *apps.DaemonSet) (*apps.DaemonSet, error) {
if k.namespace == "" {
return nil, errNoNamespace
}
out, err := k.client().AppsV1().DaemonSets(k.namespace).Update(context.TODO(), spec, v1.UpdateOptions{})
if k8serrors.IsNotFound(err) {
return nil, errors.NotFoundf("daemon set %q", spec.GetName())
}
return out, errors.Trace(err)
}
func (k *kubernetesClient) deleteDaemonSet(name string, uid types.UID) error {
if k.namespace == "" {
return errNoNamespace
}
err := k.client().AppsV1().DaemonSets(k.namespace).Delete(context.TODO(), name, utils.NewPreconditionDeleteOptions(uid))
if k8serrors.IsNotFound(err) {
return nil
}
return errors.Trace(err)
}
func (k *kubernetesClient) listDaemonSets(labels map[string]string) ([]apps.DaemonSet, error) {
if k.namespace == "" {
return nil, errNoNamespace
}
listOps := v1.ListOptions{
LabelSelector: utils.LabelsToSelector(labels).String(),
}
out, err := k.client().AppsV1().DaemonSets(k.namespace).List(context.TODO(), listOps)
if err != nil {
return nil, errors.Trace(err)
}
if len(out.Items) == 0 {
return nil, errors.NotFoundf("daemon set with labels %v", labels)
}
return out.Items, nil
}
func (k *kubernetesClient) deleteDaemonSets(appName string) error {
if k.namespace == "" {
return errNoNamespace
}
labels := utils.LabelsForApp(appName, k.IsLegacyLabels())
err := k.client().AppsV1().DaemonSets(k.namespace).DeleteCollection(context.TODO(), v1.DeleteOptions{
PropagationPolicy: constants.DefaultPropagationPolicy(),
}, v1.ListOptions{
LabelSelector: utils.LabelsToSelector(labels).String(),
})
if k8serrors.IsNotFound(err) {
return nil
}
return errors.Trace(err)
}