Automate Kubernetes Cluster Using Ansible

Problem Statement

• Launch ec2-instances on AWS Cloud eg. for master and slave.
• Create roles that will configure the master node and slave node separately.
• Launch a wordpress and MySQL database connected to it in the respective slaves.
• Expose the wordpress pod and the client able to hit the wordpress IP with its respective port.

Solution

• For Configuring and launching the k8smulti node cluster I am using my own ansible collection 😅.
• For Wordpress and Mysql we need to create yml files for k8s and deploy them.

Step-1)Launch ec2-instances on AWS Cloud and Configuring k8s Multi-Node

• Install collection

ansible-galaxy collection install rootritesh.k8s_cluster

Learn More:

Configuring k8s Multi-Node cluster using Ansible

• Only we need to copy the files from local yml files for k8s of wordpress+mysql to the cluster so that we can execute that.

Step-2)Creating a wordpress.yml file.

• Create a file wordpress.yml

• This file divided into two parts.
• First One for service for exposing the wordpress
• Second: for the deployment of wordpress.
• In this deployment, I have already included the env for hosts, password so that we don’t need to type the hosts at the time of configuration of Wordpress
• For password, I have used Secret.

Step-3)Creating a db.yml file.

• Create a db.yml file.

• Same here also two parts.
• First: for Service, I am using type ClusterIP for making db secure.
• Second and finally: For deployment, in this deployment for the MySQL root password I am using secret.

Step-3)Creating a Kustomization.yml file

• Create a file kustomization.yml

• In this file, I have created secrets and included files for deployment.

Step-4)Running the files

• Launching ec2 on AWS.

• Calling the ec2 role from ansible collections.
• Configuring k8s multi-node and copying files for deployment.

• First I am calling role k8s_master for configuring k8s master and k8s_slave for configuring k8s slave.
• After this, I am copying deployments files from local to remote to the k8s master-slave.
• And finally, running the file using shell module, kubectl apply -k .(this command finds the kustomization file and run it).

Output 🚀

• EC2 instance launched 😀.

• K8s Multi-Node Configured 😄.

Wordpress Site

• When you open Wordpress, you don’t need to add MySQL DB, pass, etc, because at the time of deployment in wordpress.yml, for these keywords, I have used labels.

Github Link:

rootritesh/Automate_k8s_ansible