[zh-cn] Resync 2022-05-27-maxunavailable-for-statefulset.md
parent
93bac34b77
commit
44f781d74c
|
@ -14,6 +14,8 @@ slug: maxunavailable-for-statefulset
|
|||
-->
|
||||
**作者:** Mayank Kumar (Salesforce)
|
||||
|
||||
**译者:** Xiaoyang Zhang(Huawei)
|
||||
|
||||
<!--
|
||||
Kubernetes [StatefulSets](/docs/concepts/workloads/controllers/statefulset/), since their introduction in
|
||||
1.5 and becoming stable in 1.9, have been widely used to run stateful applications. They provide stable pod identity, persistent
|
||||
|
@ -33,7 +35,7 @@ Kubernetes [StatefulSet](/zh-cn/docs/concepts/workloads/controllers/statefulset/
|
|||
Here are some examples:
|
||||
|
||||
- I am using a StatefulSet to orchestrate a multi-instance, cache based application where the size of the cache is large. The cache
|
||||
starts cold and requires some siginificant amount of time before the container can start. There could be more initial startup tasks
|
||||
starts cold and requires some significant amount of time before the container can start. There could be more initial startup tasks
|
||||
that are required. A RollingUpdate on this StatefulSet would take a lot of time before the application is fully updated. If the
|
||||
StatefulSet supported updating more than one pod at a time, it would result in a much faster update.
|
||||
-->
|
||||
|
@ -82,7 +84,8 @@ spec:
|
|||
app: nginx
|
||||
spec:
|
||||
containers:
|
||||
- image: k8s.gcr.io/nginx-slim:0.8
|
||||
# 镜像自发布以来已更改(以前使用的仓库为 "k8s.gcr.io")
|
||||
- image: registry.k8s.io/nginx-slim:0.8
|
||||
imagePullPolicy: IfNotPresent
|
||||
name: nginx
|
||||
updateStrategy:
|
||||
|
@ -107,15 +110,15 @@ has 5 replicas, with `maxUnavailable` set to 2 and `partition` set to 0.
|
|||
`maxUnavailable` 设置为 2 并将 `partition` 设置为 0。
|
||||
|
||||
<!--
|
||||
I can trigger a rolling update by changing the image to `k8s.gcr.io/nginx-slim:0.9`. Once I initiate the rolling update, I can
|
||||
I can trigger a rolling update by changing the image to `registry.k8s.io/nginx-slim:0.9`. Once I initiate the rolling update, I can
|
||||
watch the pods update 2 at a time as the current value of maxUnavailable is 2. The below output shows a span of time and is not
|
||||
complete. The maxUnavailable can be an absolute number (for example, 2) or a percentage of desired Pods (for example, 10%). The
|
||||
absolute number is calculated from percentage by rounding down.
|
||||
absolute number is calculated from percentage by rounding up to the nearest integer.
|
||||
-->
|
||||
我可以通过将镜像更改为 `k8s.gcr.io/nginx-slim:0.9` 来触发滚动更新。一旦开始滚动更新,
|
||||
我可以通过将镜像更改为 `registry.k8s.io/nginx-slim:0.9` 来触发滚动更新。一旦开始滚动更新,
|
||||
就可以看到一次更新 2 个 Pod,因为 `maxUnavailable` 的当前值是 2。
|
||||
下面的输出显示了一个时间段内的结果,但并不是完整过程。`maxUnavailable` 可以是绝对数值(例如 2)或所需 Pod
|
||||
的百分比(例如 10%),绝对数是通过百分比计算结果进行四舍五入得出的。
|
||||
的百分比(例如 10%),绝对数是通过百分比计算结果进行四舍五入到最接近的整数得出的。
|
||||
|
||||
```
|
||||
kubectl get pods --watch
|
||||
|
|
Loading…
Reference in New Issue