What is this repository for?

This repository will help you install Mediawiki on AWS in fully automated fashion using Terraforma, AWS cli and Ansible.

Terraform is responsible for provisioning infrastructure on AWS while Ansible helps install Mediawiki.

Diagrams - Infra

Diagram - Execution

1. Traffic arrives on load balancer and get routed to web servers in public subnet
2. Web servers can only make calls to DB server in private subnet

Useful links

1. Media Wiki installation steps link
2. Enabling keyless authentication link
3. Enabling passwordless sudo link

How to Execute Terrform Scripts

Preparing Master Machine

Please refer to file - master-setup-script.sh

chmod 700 master-setup-script.sh
./master-setup-script.sh

Plan

terrform plan

Apply

terraform apply

Destroy

terraform destroy

How to Execute Ansible Playbook independent of Terraform

ansible-playbook -i non-production master-install-mediawiki.yaml

Logs

1. terraform plan Logs
2. terraform apply Logs
3. terraform destroy Logs
4. Ansible Logs

How to Secure Passwords

1. Open /etc/ansible/ansible.cfg
2. Update setting "vault_password_file" to point to a file where vault password is stored
3. Reference

Things to consider

1. Check python version of destination machines. If version <= 3 then please comment "ansible_python_interpreter" in group_vars
2. Check if destination machine does not prompt during package upgrade. In my case grub prompt halted my ansible execution.
3. Pre-bake your image and provide ami-id in terraform.tfvars

For any questions, please write to me at visharad.dhavle[at].gmail.com