Assignment

Workflow

Infrastructure provisioning with Terraform

cd tf-aws-instance
terraform init
terraform plan
terraform apply
terraform destroy
terraform state list

Mediawiki Setup with Ansible playbook

Prerequisites

SSH keys deploy for list of the servers from inventory

ansible-playbook -i inventory ssh_deploy.yml
ansible-playbook -i inventory mediawiki.yml --syntax-check
ansible-playbook -i inventory mediawiki.yml

Ansible Playbook Execution Output Log: Refer ansible_playbook_workflow

Points

• Blue-Green Deployment

  • As Terraform is built with Stateful architecture, we can define strategies/policies based on the requirement which revolves around Automation of Terraform operations and any configuration management tools like Chef/Puppet/Ansible etc.
  • Also, This can be achieved with Cloud Formation templates (deploying new stacks and gradually discarding old stacks) along with the integration of CloudWatch alerting
  • For containers based approach - need to implement Stacks from Docker Swarm or services and Deployments (ReplicaSet) from K8S

• Application Scaling

  • While Defining Application scaling strategies, need to consider below points:
    • Agility
    • Load Balancing (IP/Routing/Nodes based etc.)
    • High Availability (Multizone/DC/Region etc. )
    • Backup and Restore - DR (Hot/Cold Data, Data retention strategies etc.)
    • Failover (Availability Zones/MTTR-MTTF etc.)
    • Updates and Rollbacks
    • Content Delivery across client locations
    • Applying Configuration changes (Version, Repo, URL/Links etc.)