Iac Skill

Infrastructure as Code Skill

Overview

Master IaC with Terraform, Ansible, and CloudFormation for automated infrastructure.

Parameters

Core Topics

MANDATORY

• Terraform HCL syntax and providers
• State management and locking
• Modules and workspaces
• Ansible playbooks and roles
• Inventory management

OPTIONAL

• CloudFormation templates
• Pulumi and CDK
• Testing IaC (terratest)
• Secret management

ADVANCED

• Custom providers
• Complex module design
• Multi-cloud strategies
• Drift detection

Quick Reference

# Terraform
terraform init
terraform plan -out=plan.tfplan
terraform apply plan.tfplan
terraform destroy
terraform fmt -recursive
terraform validate
terraform state list
terraform import aws_instance.web i-123

# State Management
terraform state mv old new
terraform state rm resource
terraform force-unlock LOCK_ID

# Ansible
ansible-playbook -i inventory playbook.yml
ansible-playbook playbook.yml --check --diff
ansible-playbook playbook.yml --tags nginx
ansible all -m ping -i inventory
ansible-vault encrypt secrets.yml

Troubleshooting

Common Failures

Debug Checklist

1. Validate: terraform validate
2. Check state: terraform state list
3. Debug: TF_LOG=DEBUG terraform plan
4. Verify credentials

Recovery Procedures

Corrupted State

1. Restore from S3 versioning
2. Or import: terraform import for each resource

Resources

• Terraform Docs
• Ansible Docs