第 2 章 集群故障排除

流程

• 运行以下命令，检查返回集群状态的系统状态：

  $ sudo systemctl status microshift

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  如果 MicroShift 无法启动，这个命令会返回上一个运行的日志。

  健康输出示例

  ● microshift.service - MicroShift
       Loaded: loaded (/usr/lib/systemd/system/microshift.service; enabled; preset: disabled)
       Active: active (running) since <day> <date> 12:39:06 UTC; 47min ago
     Main PID: 20926 (microshift)
        Tasks: 14 (limit: 48063)
       Memory: 542.9M
          CPU: 2min 41.185s
       CGroup: /system.slice/microshift.service
               └─20926 microshift run
  
  <Month-Day> 13:23:06 i-06166fbb376f14a8b.<hostname> microshift[20926]: kube-apiserver I0528 13:23:06.876001   20926 controll>
  <Month-Day> 13:23:06 i-06166fbb376f14a8b.<hostname> microshift[20926]: kube-apiserver I0528 13:23:06.876574   20926 controll>
  # ...

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• 可选：运行以下命令来获取全面的日志：

  $ sudo journalctl -u microshift

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  注意

  systemd 日志服务的默认配置会将数据存储在易失性目录中。要在系统重启后保留系统日志，请启用日志持久性并为最大日志数据大小设置限制。

• 可选：如果 MicroShift 正在运行，请输入以下命令检查活跃 pod 的状态：

  $ oc get pods -A

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  输出示例

  NAMESPACE                   NAME                                                     READY   STATUS   RESTARTS  AGE
  default                     i-06166fbb376f14a8bus-west-2computeinternal-debug-qtwcr  1/1     Running  0		    46m
  kube-system                 csi-snapshot-controller-5c6586d546-lprv4                 1/1     Running  0		    51m
  openshift-dns               dns-default-45jl7                                        2/2     Running  0		    50m
  openshift-dns               node-resolver-7wmzf                                      1/1     Running  0		    51m
  openshift-ingress           router-default-78b86fbf9d-qvj9s                          1/1     Running  0		    51m
  openshift-ovn-kubernetes    ovnkube-master-5rfhh                                     4/4     Running  0		    51m
  openshift-ovn-kubernetes    ovnkube-node-gcnt6                                       1/1     Running  0		    51m
  openshift-service-ca        service-ca-bf5b7c9f8-pn6rk                               1/1     Running  0		    51m
  openshift-storage           topolvm-controller-549f7fbdd5-7vrmv                      5/5     Running  0		    51m
  openshift-storage           topolvm-node-rht2m                                       3/3     Running  0		    50m

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  注意

  这个示例输出显示基本的 MicroShift。如果您安装了可选的 RPM，则您的输出中也会显示运行这些服务的 pod 状态。