kubernetes command summary Set

1. Turn off virtual memory

   swapoff -a
   vim /etc/fstabl
   #/dev/mapper/centos-swap swap

2. View docker environment variables

   systemctl show --property=Environment docker

3. Set agent cancel agent

   export http_proxy="http://127.0.0.1:8123/"
   unset http_proxy

4. View token

   kubeadm token list

5. Get token command in SA

   kubectl -n kube-system get secret admin-token-nwphb -o jsonpath={.data.token}|base64 -d
   kubectl -n kube-system describe secret `kubectl -n kube-system get secret|grep admin-token|cut -d " " -f1`|grep "token:"|tr -s " "|cut -d " " -f2
   

6. Generate token

   head -c 16 /dev/urandom | od -An -t x | tr -d ' '

7. Regenerate the token added to the node

   kubeadm token create --print-join-command

8. View the reason for node noready

   journalctl -f -u kubelet

9. View software version

   yum search --showduplicates  xxx

10. Install a specific version of software

    apt-get install -y kubelet=1.11.3-00 kubeadm=1.11.3-00 kubectl=1.11.3-00
    yum  install -y kubelet-1.11.3 kubeadm-1.11.3 kubectl-1.11.3

11. kubernetes cluster initialization

    kubeadm reset

12. View the required images for a specific version of kubernetes

    kubeadm --kubernetes-version=1.11.0 config images list

13. Force deletion of pod that always belongs to terminating

    kubectl delete pod $POD_ID --force --grace-period=0

14. Deploy pod, deployment, daemonset, etc

    Kubectl create -f xxx
    kubectl apply -f xx

15. Deploy pod, deployment, daemonset, etc

    kubectl set image deployment/nginx-deployment nginx=nginx:1.91 --record
    kubectl apply -f xx(Must pass xx Create)

16. Tail the node

    kubectl taint nodes <node_name> <key>=<value>:NoSchedule

17. Restore nodes from taint

    kubectl taint nodes <node_name> <key>=<value>:NoSchedule-

18. Isolate and expel the node s

    kubectl cordon <node>
    kubectl drain <node>

19. Restore a node from an isolated state

    kubectl uncordon <node>

20. Add node label

    kubectl label pod redis  role=backend

21. Delete node label

    kubectl label pod redis role-

    Summary record, continue to add!