Deploy Wordpress on OpenShift Cluster

This guide walks through deploying a WordPress application on an OpenShift cluster using built-in templates, ConfigMaps, routes with self-signed TLS, and basic WordPress. It is designed for hands-on learning and local or lab environments such as CRC.

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Content

• Architecture Diagram
• Create Project
• Deploy MySQL Using Template
• Create WordPress ConfigMap
• Deploy WordPress Application
• Configure WordPress Environment Variables
• Expose Application with Self-Signed TLS Route
• Reset WordPress Admin Password via WP-CLI
• Screenshots

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Architecture Diagram

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Create project

Create and switch to a dedicated OpenShift project for the WordPress deployment.

oc login -u developer
oc new-project wp-project

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Deploy MySQL Using Template

Use the built-in mysql-persistent template to deploy a MySQL database backend for WordPress.

oc new-app --template mysql-persistent \
-p MYSQL_USER=wp_user -p MYSQL_PASSWORD="password" \
-p MYSQL_ROOT_PASSWORD="password" -p MYSQL_DATABASE=wp_db \
--as-deployment-config --dry-run=client -oyaml > mysql-deployment.yaml


# apply to openshift
oc apply -f mysql-deployment.yaml

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Create WordPress ConfigMap

Create a ConfigMap to store database connection details used by the WordPress application.

oc create cm wp-config --from-literal host=mysql \
--from-literal name=wp_db --from-literal user=root \
--from-literal password="password" --dry-run=client -oyaml > wp-configmap.yaml

# apply to openshift
oc apply -f wp-configmap

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Deploy WordPress Application

Deploy the WordPress application using the Bitnami WordPress container image.

oc new-app --name wp-app --image docker.io/bitnami/wordpress \
--dry-run=client -oyaml > wp-deployment.yaml

# apply to openshift
oc apply -f wp-deployment.yaml

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Configure WordPress Environment Variables

Inject database configuration into the WordPress deployment using environment variables sourced from the ConfigMap.

# set the configuratino to the worpdress deployment wp-app
oc set env deployment wp-app --prefix WORDPRESS_DATABASE_ --from configmap/wp-config

# check the list of environment
oc set env deploy/wp-app --list

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Expose Application with Self-Signed TLS Route

Create a self-signed certificate and expose the WordPress service securely using an OpenShift edge route.

# create the certificates
openssl genrsa -out myCA.key 2048


# on the popup set the hostname --> your current hostname vm
openssl req -x509 -new -nodes \
-key myCA.key -sha256 -days 3650 -out myCA.pem


# create the tls key with sigining request
openssl genrsa -out tls.key 2048
openssl req -new -key tls.key -out tls.csr


# create the certificate tls.crt
openssl x509 -req -in tls.csr \
-CA myCA.pem -CAkey myCA.key \
-CAcreateserial -out tls.crt -days 3650 -sha256


# create ssl route for the app
oc create route edge wp-endpoint \
--service wp-app \
--cert tls.crt --key tls.key \
--hostname wp-wp-project.apps-crc.testing

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Reset WordPress Admin Password via WP-CLI

Access the WordPress pod and reset the admin password using WP-CLI.

oc rsh pod/wp-app-xxxxx
wp user list
wp user update admin --user_pass=password

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Screenshots