How to Install Helm and Deploy OpenEBS on CentOS 7 for Kubernetes

1. Basic Architecture Diagram

2. Install Helm

Download Helm from the official releases page. https://github.com/helm/helm/releases Select the Linux amd64 binary for CentOS 7. tar -xzvf helm-v3.14.4-linux-amd64.tar.gz Move Helm to the bin directory. mv linux-amd64/helm /usr/local/bin/helm Verify the installation.

helm version

3. Deploy OpenEBS Control Plane

Add and update the OpenEBS chart repository.

helm repo add openebs https://openebs.github.io/charts
helm repo update

Install OpenEBS.

helm install --namespace openebs openebs openebs/openebs

4. Deploy PostgreSQL Namespace and Storage

Create a dedicated namespace for PostgreSQL. kubectl create namespace database List namespaces to confirm.

kubectl get namespaces

Create a storage pool and a storage class (openebs‑standard) for persistent volumes.

Create a ConfigMap for PostgreSQL credentials.

cat > postgres-configmap.yaml <<EOF
apiVersion: v1
kind: ConfigMap
metadata:
  name: postgres-config
  labels:
    app: postgres
  namespace: database
data:
  POSTGRES_DB: postgresdb
  POSTGRES_USER: postgresadmin
  POSTGRES_PASSWORD: admin12345
EOF
kubectl create -f postgres-configmap.yaml

Verify the ConfigMap.

kubectl get configmaps -n database

Persistent Storage Volume details (omitted for brevity).