Red Hat OpenShift Container Platform 4.x

OpenShift is Red Hat's enterprise Kubernetes distribution with integrated CI/CD, monitoring, and security features.

OpenShift 4.x Architecture

• Control Plane: API Server, etcd, Scheduler, Controller Manager
• Worker Nodes: Container workload execution
• Infrastructure Nodes: Router, Registry, Monitoring

IPI Installation

# Download OpenShift installer
wget https://mirror.openshift.com/pub/openshift-v4/clients/ocp/latest/openshift-install-linux.tar.gz
tar xvf openshift-install-linux.tar.gz

Create install config
./openshift-install create install-config --dir=cluster
Start cluster installation
./openshift-install create cluster --dir=cluster --log-level=info
Set kubeconfig
export KUBECONFIG=cluster/auth/kubeconfig

Cluster Management

# Node status
oc get nodes
oc get clusterversion
oc get co

Project management
oc new-project myapp
oc get projects

Application Deployment

# Create deployment
oc create deployment webapp --image=nginx:latest --replicas=3

Expose service
oc expose deployment webapp --port=80
oc expose svc webapp
Check status
oc get pods
oc get route

Conclusion

OpenShift 4.x is a complete platform for enterprise Kubernetes needs. Operator pattern automates Day-2 operations.