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.
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
II. Add anyuid
SCC to Service Account testsa
oc adm policy add-scc-to-user anyuid -z testa
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
IV. Scale up nginx
application to 5 replicas
oc scale --replicas=5 dc nginx
V. Delete nginx
application using label app=test
oc delete all -l app=test
VI. Export nginx
application definition to nginx.yaml
oc new-app --docker-image nginx --name nginx -l app=test -o yaml > nginx.yaml
VII. Deploy nginx
application using nginx.yaml
oc apply -f nginx.yaml
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
IX. Export nginx
application to nginx-template
template
oc export dc nginx --as-template=nginx-template
X. Set requests
& limits
of nginx
application
oc set resources dc nginx --requests=cpu=250m --limits=cpu=250m
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
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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