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suspend.go
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suspend.go
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/*
Copyright 2020 The Flux authors
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 main
import (
"context"
"errors"
"fmt"
"github.com/spf13/cobra"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/fluxcd/flux2/v2/internal/utils"
)
var suspendCmd = &cobra.Command{
Use: "suspend",
Short: "Suspend resources",
Long: `The suspend sub-commands suspend the reconciliation of a resource.`,
}
type SuspendFlags struct {
all bool
}
var suspendArgs SuspendFlags
func init() {
suspendCmd.PersistentFlags().BoolVarP(&suspendArgs.all, "all", "", false,
"suspend all resources in that namespace")
rootCmd.AddCommand(suspendCmd)
}
type suspendable interface {
adapter
copyable
isSuspended() bool
setSuspended()
}
type suspendCommand struct {
apiType
list listSuspendable
object suspendable
}
type listSuspendable interface {
listAdapter
item(i int) suspendable
}
func (suspend suspendCommand) run(cmd *cobra.Command, args []string) error {
if len(args) < 1 && !suspendArgs.all {
return fmt.Errorf("%s name is required", suspend.humanKind)
}
ctx, cancel := context.WithTimeout(context.Background(), rootArgs.timeout)
defer cancel()
kubeClient, err := utils.KubeClient(kubeconfigArgs, kubeclientOptions)
if err != nil {
return err
}
if len(args) < 1 && suspendArgs.all {
listOpts := []client.ListOption{
client.InNamespace(*kubeconfigArgs.Namespace),
}
if err := suspend.patch(ctx, kubeClient, listOpts); err != nil {
return err
}
return nil
}
processed := make(map[string]struct{}, len(args))
for _, arg := range args {
if _, has := processed[arg]; has {
continue // skip object that user might have provided more than once
}
processed[arg] = struct{}{}
listOpts := []client.ListOption{
client.InNamespace(*kubeconfigArgs.Namespace),
client.MatchingFields{
"metadata.name": arg,
},
}
if err := suspend.patch(ctx, kubeClient, listOpts); err != nil {
if err == ErrNoObjectsFound {
logger.Failuref("%s %s not found in %s namespace", suspend.kind, arg, *kubeconfigArgs.Namespace)
} else {
logger.Failuref("failed suspending %s %s in %s namespace: %s", suspend.kind, arg, *kubeconfigArgs.Namespace, err.Error())
}
}
}
return nil
}
var ErrNoObjectsFound = errors.New("no objects found")
func (suspend suspendCommand) patch(ctx context.Context, kubeClient client.WithWatch, listOpts []client.ListOption) error {
if err := kubeClient.List(ctx, suspend.list.asClientList(), listOpts...); err != nil {
return err
}
if suspend.list.len() == 0 {
return ErrNoObjectsFound
}
for i := 0; i < suspend.list.len(); i++ {
logger.Actionf("suspending %s %s in %s namespace", suspend.humanKind, suspend.list.item(i).asClientObject().GetName(), *kubeconfigArgs.Namespace)
obj := suspend.list.item(i)
patch := client.MergeFrom(obj.deepCopyClientObject())
obj.setSuspended()
if err := kubeClient.Patch(ctx, obj.asClientObject(), patch); err != nil {
return err
}
logger.Successf("%s suspended", suspend.humanKind)
}
return nil
}