Highly Available Kubernetes cluster with Ansible

This repository contains Ansible roles that will help you to create an Kubernetes highly available clusters with HAProxy for production environment using Ansible.

Requirements

Requires a machine with Ansible installed.

If you want to create it in AWS this repository contains Terraform files that automates the creation of instances, so you will need to install Terraform.

How to Use

Creating Instances

If you are using AWS you can create the instances with Terraform. In this setup we will use seven instances: 3 Managers, 3 Workers and 1 for HAProxy.

Steps:

• Set AWS environment variables

export AWS_ACCESS_KEY_ID=AKIAIOSFODNN7EXAMPLE
export AWS_SECRET_ACCESS_KEY=wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
export AWS_DEFAULT_REGION=us-east-1

replace with your ACCESS KEY ID, SECRET ACCESS KEY and AWS region where do you want to create the resources.

• Init and execute Terraform apply

git clone https://github.com/HailsonJunior/kubernetes-ansible.git
cd kubernetes-ansible/terraform
terraform init
terraform apply

Creating Kubernetes Cluster

To use the Ansible roles you will only need to use the playbook playbook-k8s.yml in kubernetes-ansible directory.

--
- name: Cluster K8s Multi Master With HAProxy
  hosts: 'all'
  any_errors_fatal: true
  become: yes
  become_method: sudo
  roles:
    - { role: prepare-environment, tags: ["prepare-environment"]}
    - { role: haproxy, tags: ["haproxy"]}
    - { role: k8s, tags: ["k8s"]}

... 

If you have not created the instances using Terraform files from this repository will be needed to edit the Ansible inventory file replacing the IPs kubernetes-ansible/inventory.ini according to your environment.

[managers]
manager1 ansible_host=172.31.87.40
manager2 ansible_host=172.31.87.41
manager3 ansible_host=172.31.87.42

[workers]
worker1 ansible_host=172.31.87.43
worker2 ansible_host=172.31.87.44
worker3 ansible_host=172.31.87.45

[haproxy]
haproxy1 ansible_host=172.31.87.46

• To execute Ansible playbook:

ansible-playbook -v -i inventory.ini playbook-k8s.yml