Kubernetes Common Commands

Kubectl related

• Keyword Concepts
  Pods
  Labels
  Replication Controller
  Services
  Volumes
  Kubectl Command Detailed description

• Get pod List

  The # command returns the list of pods that are currently created by the kubernetes, mainly displaying the following message  # NAME ready     STATUS    restarts   age$ kubectl get pod # NAME Ready STATUS restarts Age# etcd-global-9002d 1/1 Running 0 2d# etcd-global-l3ph8 1/1 Running 0 2d
                 
                  # etcd-global-psj52 1/1 Running 0 2d 
                    

• View pod Details

  # Use pod name to view pod details, mainly container details $ kubectl describe pod etcd-global-9002d

• Querying the Deployment list

  # Get Deployment List $ kubectl Get deployment

• Remove deployment

  # Remove the deployment named Etcd-minikube $ kubectl Delete deployment Etcd-minikube

• Delete Container

  # Remove RC, that is, remove all containers of the RC control $ kubectl Delete rc My-nginx# Delete svc, that is, delete the assigned virtual ip$ kubectl Delete svc my-ngin

• Get Replication Controller

  # Get Replication Controller list $ kubectl get RC

• External access to KUBECTL internal ports

  The # Expose command will create a service that associates a random port on a local (on a node) to a container of 80 ports $ kubectl expose RC My-nginx--port=80--type=loadbalancer

• Enquiry Service Information

  # above through expose created a service called My-nginx, we can query the services information by the following command $ kubectl get Svc My-nginx

• To create a pod from a configuration file

  # Create containers based on configuration file *.yaml $ kubectl create-f./hello-world.yaml

• Configuration file Correctness Check

  # Use the--vaildate parameter to verify the configuration file correctness $ kubectl create-f./hello-world.yaml--validate

• View Logs

  # view Vttablet logs $ kubectl logs vttablet-100 Vttablet# view Vttablet in MySQL log $ kubectl logs vttablet-100 MySQL 

• Shell Login

  EXEC vttablet-100-c vttablet-t-i--bash-il

• View service Details

  Kubectl Describe service Etcd-global

• RC Copy Number modification

  # Dynamic capacity scaling can be achieved by locally dynamically modifying the number of RC copies Kubectl scale RC xxxx--replicas=3

• Query Replica Set

  Kubectl Get RS

• View Endpoints List

  # View Endpoints list  # Endpoint = (Pod Ip + containerport) kubectl get Endpoints

• View namespaces

  Kubectl Get namespace

• Node isolation and Recovery

  ' {' spec ': {' unschedulable ': ' True}}'{' spec ': {' unschedulable ': true}'# Quarantine can also be passed Kubectl replace-f Xxx.yaml Command Implementation   

• Pod Add/Remove/Modify Label

  # to pod xxx add lable app=vitesskubectl label pod xxx app=vitess# remove pod xxx lable appkubectl label pod xxx app-  # Modify pod xxx label kubectl label pod xxx app=mysql--overwrite 

• Viewing pod logs

  <pod_name<container_name> 

Kubernetes Common Commands