kubernetes 日志定制查阅 - 排错 -- 好用的命令

You can use kubectl logs to retrieve logs from a previous instantiation of a container with --previous flag, in case the container has crashed.  #跟踪已经崩溃的容器

sidecar container

containers:
  - name: count
    image: busybox
    args:
    - /bin/sh
    - -c
    - >
      i=0;
      while true;
      do
        echo "$i: $(date)" >> /var/log/1.log;
        echo "$(date) INFO $i" >> /var/log/2.log;
        i=$((i+1));
        sleep 1;
      done
    volumeMounts:
    - name: varlog
      mountPath: /var/log
  - name: count-log-1
    image: busybox
    args: [/bin/sh, -c, 'tail -n+1 -f /var/log/1.log']
    volumeMounts:
    - name: varlog
      mountPath: /var/log
  - name: count-log-2
    image: busybox
    args: [/bin/sh, -c, 'tail -n+1 -f /var/log/2.log']
    volumeMounts:
    - name: varlog
      mountPath: /var/log
  volumes:
  - name: varlog
    emptyDir: {}

# count-log-1 三轮摩托车的测边

# count-log-2 

kubectl logs counter count-log-1

kubectl logs counter count-log-2

记录容器count的不同日志

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节点状态查看：

a. kubectl get nodes

b.查看组件状态：

kubectl get cs #####################################

这是一个不错的命令：

[root@node1 ~]# kubectl get cs
NAME STATUS MESSAGE ERROR
etcd-1 Unhealthy Get https://172.16.5.92:2379/health: dial tcp 172.16.5.92:2379: getsockopt: connection refused
scheduler Healthy ok
controller-manager Healthy ok
etcd-2 Healthy {"health": "true"}
etcd-0 Healthy {"health": "true"}

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