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Sagar Jadhav
Sagar Jadhav

Posted on • Originally published at developersthought.in

12 Useful OpenShift Commands You Should Know

#devops #kubernetes #cloud #opensource

Introduction

Redhat OpenShift is a Container Management and a Hybrid Cloud Platform. It gives you the ability to develop and run containerized applications along with OOTB integration with existing DevOps tools. Checkout OpenShift documentation for more details.

Containers

OC CLI is used to perform various operations on OpenShift. It is similar to kubectl CLI and offers all the operations that you can perform with kubectl CLI plus additional support for native OpenShift features. Checkout OC CLI documentation for more details.

12 Useful OpenShift Commands

I. Create Service Account testsa

oc create sa testsa
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II. Add anyuid SCC to Service Account testsa

oc adm policy add-scc-to-user anyuid -z testa
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III. Deploy nginx application using nginx Docker Image from Docker Hub with label app=test

oc new-app --docker-image nginx --name nginx -l app=test
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IV. Scale up nginx application to 5 replicas

oc scale --replicas=5 dc nginx
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V. Delete nginx application using label app=test

oc delete all -l app=test
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VI. Export nginx application definition to nginx.yaml

oc new-app --docker-image nginx --name nginx -l app=test -o yaml > nginx.yaml
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VII. Deploy nginx application using nginx.yaml

oc apply -f nginx.yaml
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VIII. Deploy Node.js Hello World application using GitHub URL with label app=test and name helloworld

oc new-app https://github.com/sagar-jadhav/node-hello --name helloworld -l app=test
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IX. Export nginx application to nginx-template template

oc export dc nginx --as-template=nginx-template
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X. Set requests & limits of nginx application

oc set resources dc nginx --requests=cpu=250m --limits=cpu=250m
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XI. Create Edge Terminated Route nginx-route for nginx service using nginx.key & nginx.crt files

oc create route edge nginx-route --service=nginx --key=nginx.key --cert=nginx.crt
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XII. Create secret user-creds with values user=admin and password=admin

oc create secret generic user-creds --from-literal='user'='admin' --from-literal='password'='admin'
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