Kubernetes container cluster kubectl management Tools command (eight)

Create an App

[[email protected] ~]# kubectl run nginx--replicas=3 --labels="app=nginx-example" --image=nginx:1.10 --port=Replicas: 3 copies, default 1 Labels: identity recognition attribute, Image: Download from hub by default

View Apps

[Email protected] ~]# KubectlGetAll NAME ' ready STATUS ' restarts age pod/nginx-f95d765f9-bxgv90/1Containercreating02m pod/nginx-f95d765f9-pdq4x0/1Containercreating02m pod/nginx-f95d765f9-znxw20/1Containercreating02m NAME TYPE CLUSTER-ip external-IP PORT (S) Age service/kubernetes Clusterip10.10.10.1<none>443/TCP 21h NAME desired current up-to-DATE AVAILABLE Age deployment.extensions/nginx3 3 3 02m NAME desired current ready age Replicaset.extensions/nginx-f95d765f93 3 02m NAME desired current up-to-DATE AVAILABLE Age Deployment.apps/nginx3 3 3 02m NAME desired current ready age Replicaset.apps/nginx-f95d765f93 3 02m is in the middle of creation

View pod Details

[Email protected] ~]# Kubectl describe pod/nginx-f95d765f9-bxgv9

View Pod Labels

[Email protected] ~]# KubectlGetPods--show-Labelsname Ready STATUS restarts age Labelsnginx-f95d765f9-bxgv91/1Running09m app=nginx-example,pod-template-hash=951832195Nginx-f95d765f9-pdq4x1/1Running09m app=nginx-example,pod-template-hash=951832195Nginx-f95d765f9-znxw21/1Running09m app=nginx-example,pod-template-hash=951832195

See which node the pod is assigned to

[Email protected] ~]# KubectlGetPods-o widename Ready STATUS restarts age IP nodebusybox-5d4f595646-tqfp21/1Running22m172.17.45.4   192.168.1.102Nginx-f95d765f9-bxgv91/1Running014m172.17.47.2   192.168.1.103Nginx-f95d765f9-pdq4x1/1Running014m172.17.45.2   192.168.1.102Nginx-f95d765f9-znxw21/1Running014m172.17.47.3   192.168.1.103

 [[email protected] ~]# kubectl get  Deploy- o widename desired current up -to-date availabl E Age CONTAINERS IMAGES selectorbusybox  1  1  1  0   3m BusyBox busybox Run=busyboxnginx  3  3  3  3  15m nginx nginx:1.10  AP P=nginx-example 

Get Deployname      Desired   current up-to-DATE   AVAILABLE   agebusybox   1         1          1            1            5mnginx     3         3         3            3           17m

Publish your App

Release:

[[email protected] ~]# Kubectl get Deploy
NAME desired current up-to-date AVAILABLE age
BusyBox 1 1 1 1 5m
Nginx 3 3 3 3 17m

[Email protected] ~]# kubectl expose deployment Nginx--port=--type=nodeport  Name=nginx-service

To view published apps via Svc

Get Svcname            TYPE        CLUSTER-ip   external-IP   PORT (S)        agekubernetes      clusterip   10.10 . 10.1   <none>        443/TCP        23hnginx-service   nodeport     10.10. 10.9   <none>        :36046/tcp   1m

Troubleshooting

// View Events Event kubectl describe pod name   // View events via deploy kubectl describe deploy/// View release details Kubectl describe Svc name  // View Log kubectl logs  pod name // Enter container to troubleshoot kubectl exec-it Pod Name bash

Update image Upgrade

// Update the current nginx:1.10 version to 1.11 Set image Deployments/nginx Nginx=nginx:1.11orkubectl Edit Deploy/nginx  Edit the image version number inside to save the exit

View publication status

// status of the deployment resources KUBECTL rollout status deploy/nginx//  release historical version Kubectl rollout history Deploy/nginx

Rolling back

// Fallback to previous fallback version Kubectl rollout undo deploy/Nginx default rollback   to previous version // View status kubectl  Rollout status deploy/nginx// back to the specified version kubectl rollout undo Deploy/nginx--to-revision=4 

Pod Copy expansion

// expanding the current pod to 5 kubectl scale Deploy/nginx--replicas=5 reduction is also the above command

Delete

// Delete podkubectl delete deployment.extensions/nginx// Delete Servicekubectl Delete service/nginx-Service// view getget Deploy

Kubernetes container cluster kubectl management Tools command (eight)