Kubernetes WordPress + MySQL helm chart

The simplest example of a helm chart for WordPress and MySQL (chart directory).

Also, original manifests provided for using via kubectl (original-manifests directory).

This demo was used with GCP Kubernetes cluster.

Dependencies

• gcloud (installation guide is here)
• kubectl (installation guide is here)
• helm (installation guide is here)

Setup cluster

To start using gcloud utility execute next command

gcloud init

Execute the next command to sign in

gcloud auth login

Select your GCP project (if you have one) or create a new one (you can do it via GCP Web Interface)

gcloud projects list
gcloud config set project <YOUR_PROJECT_ID>

Finally, we can setup demo cluster

gcloud container clusters create demo-cluster --zone europe-west4-a

kubectl will be automatically configured to your created cluster

You can check your demo-cluster status with next command

kubectl get nodes

Usage

1. Clone this git repository

git clone [email protected]:ltblueberry/wordpress-mysql-helm-chart.git

2. Execute next commands from repository directory

check that all templates are valid

helm template .

install chart

helm install . --generate-name

3. Check your WordPress service External IP address with next command (may take some time)

kubectl get service -n demo-application

By-default namespace that used in the chart called demo-application. If you changed it, make sure you define the proper namespace in kubectl get command.

Now you can check this IP address with web-browser

Helm Variables

Defined in values.yaml

Name	Default Value	Difinition
namespace	demo-application	Kubernetes namespace

wordpress:

Name	Default Value	Difinition
deployment.image	wordpress:4.8-apache	Docker image for Wordpress
deployment.replicaCount	1	Number of Pods to run
service.type	LoadBalancer	Kubernetes Service type
service.port	80	Publishing port

mysql:

Name	Default Value	Difinition
deployment.image	mysql:5.6	Docker image for MySQL
deployment.replicaCount	1	Number of Pods to run
service.type	ClusterIP	Kubernetes Service type
service.port	3306	Publishing port
pvc.accessMode	ReadWriteOnce	PVC Access mode
pvc.storage	2Gi	PVC Storage size

Uninstall

1. Execute the next command to get the list of helm releases

helm list

2. Execute the next command to uninstall helm release by RELEASE_NAME

helm uninstall RELEASE_NAME

License

MIT License

Copyright (c) 2020 ltblueberry