forked from nocalhost/nocalhost
/
wait.go
181 lines (163 loc) · 4.08 KB
/
wait.go
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/*
* Copyright (C) 2021 THL A29 Limited, a Tencent company. All rights reserved.
* This source code is licensed under the Apache License Version 2.0.
*/
package clientgoutils
import (
"fmt"
"time"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
v1 "k8s.io/api/apps/v1"
"k8s.io/client-go/rest"
batchv1 "k8s.io/api/batch/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/client-go/tools/cache"
)
func (c *ClientGoUtils) WaitForResourceReady(
resourceType ResourceType, name string, isReady func(object runtime.Object) (bool, error),
) error {
var runtimeObject runtime.Object
var restClient rest.Interface
switch resourceType {
case DeploymentType:
runtimeObject = &v1.Deployment{}
restClient = c.ClientSet.AppsV1().RESTClient()
case JobType:
runtimeObject = &batchv1.Job{}
restClient = c.ClientSet.BatchV1().RESTClient()
case StatefulSetType:
runtimeObject = &v1.StatefulSet{}
restClient = c.ClientSet.AppsV1().RESTClient()
default:
return errors.New("can not watch resource type " + string(resourceType))
}
f, err := fields.ParseSelector(fmt.Sprintf("metadata.name=%s", name))
if err != nil {
return errors.Wrap(err, "")
}
watchlist := cache.NewListWatchFromClient(
restClient,
string(resourceType),
c.namespace,
f, //fields.Everything()
)
stop := make(chan struct{})
defer close(stop)
exit := make(chan bool)
_, controller := cache.NewInformer(
// also take a look at NewSharedIndexInformer
watchlist,
runtimeObject,
0,
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
},
DeleteFunc: func(obj interface{}) {
},
UpdateFunc: func(oldObj, newObj interface{}) {
obj, ok := newObj.(runtime.Object)
if !ok {
err = errors.New("can not get a runtime object")
exit <- true
return
}
b, err2 := isReady(obj)
if err2 != nil || b {
err = err2
exit <- true
return
}
},
},
)
go controller.Run(stop)
for {
select {
case <-c.ctx.Done():
return err
case <-exit:
return err
default:
time.Sleep(time.Second * 2)
}
}
return err
}
func (c *ClientGoUtils) WaitDeploymentToBeReady(name string) error {
return c.WaitForResourceReady(DeploymentType, name, isDeploymentReady)
}
func (c *ClientGoUtils) WaitStatefulSetToBeReady(name string) error {
return c.WaitForResourceReady(StatefulSetType, name, isStatefulSetReady)
}
func isDeploymentReady(obj runtime.Object) (bool, error) {
o, ok := obj.(*v1.Deployment)
if !ok {
return true, errors.Errorf("expected a *apps.Deployment, got %T", obj)
}
for _, c := range o.Status.Conditions {
if c.Type == v1.DeploymentAvailable && c.Status == "True" {
log.Debug("Deployment is Available")
return true, nil
}
}
log.Debug("Deployment has not been ready yet")
return false, nil
}
func isStatefulSetReady(obj runtime.Object) (bool, error) {
o, ok := obj.(*v1.StatefulSet)
if !ok {
return true, errors.Errorf("expected a *StatefulSet, got %T", obj)
}
//for _, c := range o.Status.Conditions {
// if c.Status == "True" {
// return true, nil
// }
//}
if o.Status.ReadyReplicas == 1 {
return true, nil
}
return false, nil
}
func (c *ClientGoUtils) WaitJobToBeReady(name, format string) error {
// metadata.name
f, err := fields.ParseSelector(fmt.Sprintf("%s=%s", format, name))
if err != nil {
return errors.Wrap(err, "")
}
watchlist := cache.NewListWatchFromClient(
c.ClientSet.BatchV1().RESTClient(),
"jobs",
c.namespace,
f, //fields.Everything()
)
stop := make(chan struct{})
exit := make(chan int)
_, controller := cache.NewInformer(
// also take a look at NewSharedIndexInformer
watchlist,
&batchv1.Job{},
0, //Duration is int64
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
},
DeleteFunc: func(obj interface{}) {
fmt.Printf("Job %s deleted\n", name)
},
UpdateFunc: func(oldObj, newObj interface{}) {
if completed, _ := waitForJob(newObj.(runtime.Object), name); completed {
close(stop)
exit <- 1
}
},
},
)
//defer close(stop)
go controller.Run(stop)
select {
case <-exit:
break
}
return nil
}