DaemonSet

左手的ㄟ右手 2022-10-16 08:49 5阅读 0赞

DaemonSet确保所有的Node运行同一个Pod的副本，即使新加入集群的Node也会运行。

资源编排文件

[root@k8smaster ~]# cat sts.yaml
    apiVersion: v1
    kind: Service
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      ports:
      - port: 80
        name: web
      clusterIP: None
      selector:
        app: nginx
    
    ---
    
    apiVersion: apps/v1
    kind: StatefulSet
    metadata:
      name: nginx-statefulset
      namespace: default
    spec:
      serviceName: nginx
      replicas: 3
      selector:
        matchLabels:
          app: nginx
      template:
        metadata:
          labels:
            app: nginx
        spec:
          containers:
          - name: nginx
            image: nginx:latest
            ports:
            - containerPort: 80

创建Pod

[root@k8smaster ~]# kubectl apply -f ds.yaml
    daemonset.apps/ds-test created

# 查看Pod
    [root@k8smaster ~]# kubectl get pods
    NAME                  READY   STATUS    RESTARTS   AGE
    ds-test-lkg6s         1/1     Running   0          3m9s
    nginx-statefulset-0   1/1     Running   0          77m
    nginx-statefulset-1   1/1     Running   0          77m
    nginx-statefulset-2   1/1     Running   0          77m
    
    
    # 进入容器查看收集的日志
    [root@k8smaster ~]# kubectl exec ds-test-lkg6s -it bash
    kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl kubectl exec [POD] -- [COMMAND] instead.
    root@ds-test-lkg6s:/# ls
    bin   dev                  docker-entrypoint.sh  home  lib64  mnt  proc  run   srv  tmp  var
    boot  docker-entrypoint.d  etc                   lib   media  opt  root  sbin  sys  usr
    root@ds-test-lkg6s:/# cd /tmp
    root@ds-test-lkg6s:/tmp# ls
    log
    root@ds-test-lkg6s:/tmp# cd log/
    root@ds-test-lkg6s:/tmp/log# ls
    anaconda  boot.log           btmp    containers  dmesg      firewalld           lastlog  messages  rhsm    spooler   tuned  yum.log
    audit     boot.log-20210527  chrony  cron        dmesg.old  grubby_prune_debug  maillog  pods      secure  tallylog  wtmp