Create ConfigMap

Introduction

ConfigMap allow you to decouple configuration artifacts and secrets from image content to keep containerized applications portable. Using ConfigMap, you can independently control MySQL configuration.

Create ConfigMap

Copy/Paste the following commands into your Cloud9 Terminal.

cd ~/environment/templates
wget https://eksworkshop.com/beginner/170_statefulset/configmap.files/mysql-configmap.yml

Check the configuration of mysql-configmap.yml file by following command.

cat ~/environment/templates/mysql-configmap.yml

ConfigMap stores master.cnf, slave.cnf and pass them when initializing master and slave pods defined in statefulset. master.cnf is for the MySQL master pod which has binary log option (log-bin) to provides a record of the data changes to be sent to slave servers and slave.cnf is for slave pods which has super-read-only option. 


apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql-config
  labels:
    app: mysql
data:
  master.cnf: |
    # Apply this config only on the master.
    [mysqld]
    log-bin
  slave.cnf: |
    # Apply this config only on slaves.
    [mysqld]
    super-read-only

Create configmap “mysql-config” by following command.

kubectl create -f ~/environment/templates/mysql-configmap.yml
  • mysql-configmap.yml (0 ko)