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99655b342f
When reaping a replication controller that handles an arbitrary amount of replicas, missing an interval means that `kubectl stop|delete` have to wait 3 more seconds to finish which seems more expensive from a user pov than a GET per 100ms. Also I think `kubectl resize` should wait for all replicas to spin up before exiting. Feels more safe to know that your replication controller status is up to date.
120 lines
3.1 KiB
Go
120 lines
3.1 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kubectl
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import (
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"fmt"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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)
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const (
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Interval = time.Millisecond * 100
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Timeout = time.Second * 20
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)
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// A Reaper handles terminating an object as gracefully as possible.
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type Reaper interface {
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Stop(namespace, name string, gracePeriod *api.DeleteOptions) (string, error)
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}
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type NoSuchReaperError struct {
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kind string
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}
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func (n *NoSuchReaperError) Error() string {
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return fmt.Sprintf("no reaper has been implemented for %q", n.kind)
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}
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func IsNoSuchReaperError(err error) bool {
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_, ok := err.(*NoSuchReaperError)
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return ok
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}
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func ReaperFor(kind string, c client.Interface) (Reaper, error) {
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switch kind {
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case "ReplicationController":
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return &ReplicationControllerReaper{c, Interval, Timeout}, nil
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case "Pod":
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return &PodReaper{c}, nil
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case "Service":
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return &ServiceReaper{c}, nil
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}
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return nil, &NoSuchReaperError{kind}
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}
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type ReplicationControllerReaper struct {
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client.Interface
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pollInterval, timeout time.Duration
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}
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type PodReaper struct {
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client.Interface
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}
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type ServiceReaper struct {
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client.Interface
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}
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type objInterface interface {
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Delete(name string) error
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Get(name string) (meta.Interface, error)
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}
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func (reaper *ReplicationControllerReaper) Stop(namespace, name string, gracePeriod *api.DeleteOptions) (string, error) {
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rc := reaper.ReplicationControllers(namespace)
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resizer, err := ResizerFor("ReplicationController", NewResizerClient(*reaper))
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if err != nil {
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return "", err
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}
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retry := NewRetryParams(reaper.pollInterval, reaper.timeout)
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waitForReplicas := NewRetryParams(reaper.pollInterval, reaper.timeout)
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if err = resizer.Resize(namespace, name, 0, nil, retry, waitForReplicas); err != nil {
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return "", err
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}
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if err := rc.Delete(name); err != nil {
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return "", err
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}
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return fmt.Sprintf("%s stopped", name), nil
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}
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func (reaper *PodReaper) Stop(namespace, name string, gracePeriod *api.DeleteOptions) (string, error) {
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pods := reaper.Pods(namespace)
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_, err := pods.Get(name)
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if err != nil {
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return "", err
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}
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if err := pods.Delete(name, gracePeriod); err != nil {
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return "", err
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}
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return fmt.Sprintf("%s stopped", name), nil
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}
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func (reaper *ServiceReaper) Stop(namespace, name string, gracePeriod *api.DeleteOptions) (string, error) {
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services := reaper.Services(namespace)
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_, err := services.Get(name)
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if err != nil {
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return "", err
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}
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if err := services.Delete(name); err != nil {
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return "", err
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}
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return fmt.Sprintf("%s stopped", name), nil
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}
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