Kubernetes problem sorting

Kubernetes Problem sorting

CrashLoopBackOff error

CrashLoopBackOff The meaning is ,Kubernetes Attempt to start the Pod, But there was an error in the process , The container failed to start or is being deleted .

pod Report errors "Back-off restarting failed container" terms of settlement
Link address ：https://blog.csdn.net/sqhren626232/article/details/101013390

resolvent ： stay deployment Add a command after declaring the image
command: [ “/bin/bash”, “-ce”, “tail -f /dev/null” ]
command: [“sleep”,“3600”]

Find the problem

[[email protected] ~]# kubectl get pods -o wide
NAME                                  READY   STATUS             RESTARTS   AGE     IP           NODE    NOMINATED NODE   READINESS GATES
activemq-deployment-d89bcb469-5tlkn   0/1     CrashLoopBackOff   5          7m35s   10.244.3.7   node2   <none>           <none>

see pod Details of （ chart ）

Pod Always in ImagePullBackOff state

https://www.bookstack.cn/read/kubernetes-practice-guide/troubleshooting-problems-pod-keep-imagepullbackoff.md

k8s Create app stuck ContainerCreating Solutions for

https://www.cnbugs.com/post-3276.html

Unable to update cni config: No networks found in /etc/cni/net.d

vi /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf
add to
Environment=“KUBELET_NETWORK_ARGS=–network-plugin=cni --cni-conf-dir=/etc/cni/ --cni-bin-dir=/opt/cni/bin”

Reload
systemctl daemon-reload
systemctl restart kubelet

Kubernetes Report errors Failed to get system container stats for “/system.slice/docker.service”: failed to get cgroup stats for “/system.slice/docker.service”

[[email protected] net.d]# systemctl status  kubelet
● kubelet.service - kubelet: The Kubernetes Node Agent
   Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
  Drop-In: /usr/lib/systemd/system/kubelet.service.d
           └─10-kubeadm.conf
   Active: active (running) since Sun 2021-03-21 09:43:20 CST; 1 day 7h ago
     Docs: https://kubernetes.io/docs/
 Main PID: 829 (kubelet)
    Tasks: 17
   Memory: 93.6M
   CGroup: /system.slice/kubelet.service
           └─829 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --cgroup-driver=systemd --network-plugin=cni --pod-infra-...

Mar 22 17:21:59 master1 kubelet[829]: E0322 17:21:59.967531     829 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats for "/system.slice/docker.service":...
Mar 22 17:22:10 master1 kubelet[829]: E0322 17:22:09.999160     829 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats for "/system.slice/docker.service":...
Mar 22 17:22:20 master1 kubelet[829]: E0322 17:22:20.018321     829 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats for "/system.slice/docker.service":...
Mar 22 17:22:30 master1 kubelet[829]: E0322 17:22:30.044959     829 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats for "/system.slice/docker.service":...
Mar 22 17:22:40 master1 kubelet[829]: E0322 17:22:40.069868     829 summary_sys_containers.go:47] Failed to get system container stats for "/system.slice/docker.service": failed to get cgroup stats for "/system.slice/docker.service":...