Operator SDK – 更新 CreationTimestamp

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英文:

Operator SDK - Update CreationTimestamp

问题

我目前正在使用Golang和Operator SDK编写一个Kubernetes Operator。

为了知道资源的创建是否超时,我检查当前资源的CreationTimestamp属性。在成功的Update之后,我想要更新该资源的CreationTimestamp,但是当我这样做时,什么都不会发生,CreationTimestamp保持不变...

我的Reconcile循环大致如下:

func (r *MyReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
    myObject := &v1alpha1.My{}
    err := r.Get(ctx, req.NamespacedName, myObject)
    if err != nil {
        // 处理错误
    }

    // 如果标记为删除
    // 做一些操作
    // ...

    // 如果标记为更新
    myObject.SetCreationTimestamp(v1.Now())

    err = r.Update(ctx, configMap) // 更新我更改的所有字段,但不包括CreationTimestamp...
    if err != nil {
        println("ERR:", err.Error()) // 不会抛出错误
    }

    println(myObject.CreationTimestamp) // 仍然是旧的时间戳,而不是v1.Now()

    // ...
}

或者是否有其他方法来跟踪资源上次调谐的时间?

英文:

I am currently writing a Kubernetes Operator using Golang and the Operator SDK.

In order to know if the creation of a resource has timed out I check the CreationTimestamp property of my current resource. After a successful Update I want to update the CreationTimestamp of that resource, but when I do that, nothing happens and the CreationTimestamp stays the same...

My Reconcile loop looks something like this:

func (r *MyReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
    myObject := &v1alpha1.My{}
    err := r.Get(ctx, req.NamespacedName, myObject)
    if err != nil {
      // do something
    }

    //if marked to be deleted
    //do something
    //...


    //if marked to be updated
    myObject.SetCreationTimestamp(v1.Now())

    err = r.Update(ctx, configMap) //updates all fields that I changed except for CreationTimestamp...
	if err != nil {
		println("ERR:", err.Error()) //doesnt get thrown
	}

    println(myObject.CreationTimestamp) //still the old timestamp instead of v1.Now()

   //...
}

Or is there any other way to track when the resource was reconciled the last time?

答案1

得分: 0

我不认为有一种方法可以实现这个,但我找到了一个解决方法。

在你的CRD中,字段metadata.annotations可以以map[string]string的形式存储信息,这样就不会被覆盖。

所以我创建了一个名为CreationTimestamp的字段,并在我的Go代码中使用myObject.ObjectMeta.Annotations["creationTimestamp"]来检索它。

我可以像这样更新值:myObject.ObjectMeta.Annotations["creationTimestamp"] = "newvalue",然后通过执行Update来保存更改。

英文:

I dont think there is a way to achieve this, but I found a workaround.

In your CRD the field metadata.annotations can store information in a map[string]string that wont be overwritten.

So I created a field called CreationTimestamp and retrieve it in my go code with myObject.ObjectMeta.Annotations["creationTimestamp"].

I can update the value like this: myObject.ObjectMeta.Annotations["creationTimestamp"] = "newvalue" and then doing an Update to save the changes

huangapple
  • 本文由 发表于 2022年2月22日 02:29:00
  • 转载请务必保留本文链接:https://go.coder-hub.com/71211317.html
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