Updated for OpenShift 4.14+

This tutorial helps you practice real-world OpenShift workflows locally using CRC.

---

Step 1: Login to the Web Console and CLI

Web Console

crc console --credentials

Copy the admin URL and kubeadmin credentials → open in browser.

CLI

eval $(crc oc-env)
oc login -u kubeadmin -p <password> --insecure-skip-tls-verify

---

Step 2: Understand Projects (Namespaces)

List All Projects:

oc get projects

Create Your Own:

oc new-project demo-app

---

Step 3: Deploy Your First Application

Using CLI (quickstart):

oc new-app nginx

Expose it:

oc expose svc/nginx

Get Route:

oc get route

Test in browser using the exposed route.

---

Step 4: Work with the Developer Console

1. Go to the Web Console → Developer View
2. Switch to demo-app project
3. Click +Add → Use “Container Image”
4. Search for image like node:latest, php:8.2-apache, or quay.io/...

This gives visual understanding of how apps, builds, and deployments connect.

---

Step 5: Build from Source (Git to Deployment)

Deploy from Git (Node.js example):

oc new-app https://github.com/sclorg/nodejs-ex.git

Monitor:

oc get builds
oc logs -f bc/nodejs-ex

Access:

oc expose svc/nodejs-ex
oc get route

---

Step 6: Scale Applications

Increase Pods:

oc scale --replicas=3 deployment/nginx

Check Pods:

oc get pods -o wide

---

Step 7: Access Pod Shell & Logs

oc rsh <pod-name>
oc logs <pod-name>

Use this for debugging and viewing container state.

---

Step 8: Set Resource Limits

oc set resources deployment nginx \
  --limits=cpu=500m,memory=256Mi \
  --requests=cpu=200m,memory=128Mi

---

Step 9: Understand and Apply YAML

1. Export a deployment: oc get deployment nginx -o yaml > nginx.yaml
2. Edit and apply: oc apply -f nginx.yaml

---

Step 10: Use Secrets and ConfigMaps

Create ConfigMap:

oc create configmap app-config --from-literal=ENV=prod

Create Secret:

oc create secret generic app-secret --from-literal=DB_PASS=admin123

Mount or Inject via ENV in deployment YAML.

---

Step 11: OpenShift Pipelines (Tekton)

1. In OperatorHub, install OpenShift Pipelines Operator
2. Create:
   • PipelineResource
   • Task
   • Pipeline
3. Use the developer console’s Pipelines view to build CI/CD

---

Step 12: Monitor with Web UI

• Use Observe → Metrics
• View Dashboard, Topology, and Builds
• Use Pod terminal from console

---

Step 13: Delete a Project

oc delete project demo-app

---

Bonus Tips:

Feature	CLI Command
List all Pods	oc get pods
View events	oc get events
Port Forward	oc port-forward svc/nginx 8080:80
RoleBinding	oc adm policy add-role-to-user admin developer
Enable Dev View	Use toggle in OpenShift console UI

---

Practice Ideas:

• Deploy a multi-container app with mysql + wordpress
• Create blue-green deployments
• Use Tekton pipeline to auto-deploy from GitHub

---