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  • 【k8s】StatefulSet

    环境

    1. kubernetes 1.20.4
    2. Spring Boot 2.5.0-M3

    目标

    StatefulSet 是专门为有状态服务设计的,使用 StatefulSet 创建的 Pod,有稳定的网络标识。
    现在可以先了解有这样一种资源,后面详细学习。

    示例

    StatefulSet.yaml

    apiVersion: apps/v1
    kind: StatefulSet
    metadata:
      name: spring-k8s
    spec:
      serviceName: spring
      selector:
        matchLabels:
          app: spring-k8s
      replicas: 2
      template:
        metadata:
          labels:
            app: spring-k8s
        spec:
          containers:
            - name: spring-k8s
              image: jiangbo920827/spring-k8s:liveness
              ports:
                - containerPort: 8080
    

    查看

    [root@master ~]# kubectl describe sts spring-k8s
    Name:               spring-k8s
    Namespace:          default
    CreationTimestamp:  Tue, 06 Apr 2021 20:30:19 +0800
    Selector:           app=spring-k8s
    Labels:             <none>
    Annotations:        <none>
    Replicas:           2 desired | 2 total
    Update Strategy:    RollingUpdate
      Partition:        0
    Pods Status:        2 Running / 0 Waiting / 0 Succeeded / 0 Failed
    Pod Template:
      Labels:  app=spring-k8s
      Containers:
       spring-k8s:
        Image:        jiangbo920827/spring-k8s:liveness
        Port:         8080/TCP
        Host Port:    0/TCP
        Environment:  <none>
        Mounts:       <none>
      Volumes:        <none>
    Volume Claims:    <none>
    Events:
      Type    Reason            Age   From                    Message
      ----    ------            ----  ----                    -------
      Normal  SuccessfulCreate  10m   statefulset-controller  create Pod spring-k8s-0 in StatefulSet spring-k8s successful
      Normal  SuccessfulCreate  10m   statefulset-controller  create Pod spring-k8s-1 in StatefulSet spring-k8s successful
    [root@master ~]#
    

    总结

    StatefulSet 可以创建有状态的服务,它们的名称从 0 开始,依次递增。

    附录

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  • 原文地址:https://www.cnblogs.com/jiangbo44/p/14624585.html
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