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High-Availability WordPress Template for Deployment on Kubernetes

Tags:
WordpressMySQLHigh availableHigh-Availability WordPress on Kubernetes
Created by:
Mahmood
High-Availability WordPress Template for Deployment on Kubernetes template preview
139 uses
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Running WordPress on Kubernetes with high availability requires multiple application replicas, a stable MySQL backend, session affinity, automated TLS, horizontal autoscaling, and scheduled backups. This template deploys WordPress as a 3-replica Deployment backed by a MySQL StatefulSet, with cert-manager TLS, a Horizontal Pod Autoscaler, and CronJob-based backups all preconfigured in a single manifest.

What's Included

ComponentTypePortRole
MySQLStatefulSet + Service3306Primary database with persistent storage and health monitoring
WordPressDeployment803-replica application with resource limits and readiness probes
ConfigMapConfigMap-Non-sensitive WordPress configuration values
SecretsSecret-WordPress authentication keys and database credentials
ClusterIP ServiceService-Internal access to WordPress pods
LoadBalancer ServiceService-External entry point for WordPress traffic
PersistentVolumeClaimPersistentVolumeClaim-Persistent storage for WordPress files and MySQL data
ClusterIssuerClusterIssuer-Automated Let's Encrypt TLS certificate provisioning
IngressIngress443HTTPS termination with session affinity routing
Horizontal Pod AutoscalerHorizontalPodAutoscaler-Dynamic scaling based on CPU and memory metrics
Backup CronJobCronJob-Scheduled backups for database and WordPress files

Architecture Overview

MySQL runs as a StatefulSet with persistent storage and health probes for stable database identity across restarts. WordPress runs as a 3-replica Deployment behind ClusterIP and LoadBalancer Services with session affinity so each user consistently reaches the same pod. An NGINX Ingress handles TLS termination via Let's Encrypt. The HPA adjusts WordPress replica counts based on CPU and memory usage. CronJobs handle scheduled backups for both MySQL and the WordPress file volume.

Prerequisites

  • Minimum 3 Kubernetes worker nodes
  • NGINX Ingress Controller installed
  • cert-manager installed and configured for Let's Encrypt
  • Storage class configured for dynamic PVC provisioning
  • A domain name pointed at your cluster's ingress IP
  • KubeKanvas CLI installed and running on your computer (Optional, if you want to use one-click deployment)

How to Deploy

  1. Click on the button at the top right corner of this screen to load the manifest into the editor.
  2. Update the Secret component with your MySQL credentials, database name, and WordPress authentication keys and salts.
  3. Replace domain name placeholders in the Ingress and ClusterIssuer with your values.
  4. Confirm the storage class name in the PVC definitions matches what is available in your cluster.
  5. Deploy the template to your cluster via the Play button in the top right bar. If you prefer to deploy manually, download the YAML and apply it with kubectl.
  6. Wait for all pods to reach Running status. You can monitor progress in the Release Monitor screen.

How to Test

  1. Confirm WordPress and MySQL pods are running and PVCs are bound: kubectl get pods,pvc -n <namespace>.
  2. Visit https://<your-domain>/wp-admin and verify the WordPress login screen loads over HTTPS.
  3. Log in and confirm the WordPress admin dashboard is accessible.
  4. Check the HPA is reporting metrics.

Use Cases

  • Multi-replica WordPress deployment: Running 3 WordPress replicas with session affinity so individual pod failures do not interrupt user sessions.
  • Autoscaled content sites: Deployments where WordPress replica count needs to increase automatically under CPU or memory load.
  • Backup-enabled WordPress clusters: Setups that need daily automated backups of both the database and uploaded media without external tooling.
  • Declarative WordPress infrastructure: Replacing managed WordPress hosting with a fully manifest-driven Kubernetes setup.

Summary

This template configures a 3-replica WordPress deployment on Kubernetes backed by a MySQL StatefulSet, with Let's Encrypt TLS, horizontal autoscaling, and scheduled database and file backups preconfigured. For a full walkthrough, read High-Availability WordPress Template for Deployment on Kubernetes