kubernetes:无法更新端点警告

Question

这是我在 kubectl get events 中注意到的一些内容输出

Warning   FailedToUpdateEndpoint   Endpoints                 Failed to update endpoint mynamespace/myservice: Operation cannot be fulfilled on endpoints "myservice": the object has been modified; please apply your changes to the latest version and try again

我知道 this discussion ，但我认为不适用，因为我没有明确创建 Endpoint资源来自 yaml .

我注意到在图像更新期间出现了一些轻微的服务不可用，因此我试图检查这是否相关。

使用 GKE 版本 v1.12.7-gke.25在主节点和节点上，在 istio 之上.

Answer 1

这是 的常见行为k8s 让 k8s 客户端( Controller )知道再试一次。

Kubernetes leverages the concept of resource versions to achieve optimistic concurrency. concurrency-control-and-consistency

它由系统填充。

To enable clients to build a model of the current state of a cluster, all Kubernetes object resource types are required to support consistent lists and an incremental change notification feed called a watch. Every Kubernetes object has a resourceVersion field representing the version of that resource as stored in the underlying database. When retrieving a collection of resources (either namespace or cluster scoped), the response from the server will contain a resourceVersion value that can be used to initiate a watch against the server. The server will return all changes (creates, deletes, and updates) that occur after the supplied resourceVersion. This allows a client to fetch the current state and then watch for changes without missing any updates. If the client watch is disconnected they can restart a new watch from the last returned resourceVersion, or perform a new collection request and begin again efficient-detection-of-changes