devops-infrastructure

DevOps & Infrastructure Patterns

Containerization, orchestration, infrastructure as code, and CI/CD best practices.

CRITICAL: Agentic-First DevOps

Pre-Development Verification (MANDATORY)

Before writing ANY DevOps configuration:

1. CHECK TOOL AVAILABILITY
   → run_terminal_cmd("docker --version")
   → run_terminal_cmd("kubectl version --client")
   → run_terminal_cmd("terraform --version")
   → run_terminal_cmd("helm version")
   
2. VERIFY CURRENT VERSIONS (use web_search)
   → web_search("Terraform latest version December 2024")
   → web_search("Kubernetes latest stable version 2024")
   → web_search("Docker best practices 2024")
   
3. CHECK EXISTING INFRASTRUCTURE
   → Read existing Dockerfile, docker-compose.yml, *.tf files
   → Understand current state before modifying
   → Check terraform.tfstate or remote state
   
4. VALIDATE CONFIGURATIONS BEFORE APPLYING
   → terraform validate
   → docker-compose config
   → kubectl apply --dry-run=client

CLI-First DevOps Workflow

ALWAYS use CLI for validation:

# Docker
docker build -t test:latest .
docker-compose config  # Validate compose file
docker-compose up --dry-run  # Test without running

# Kubernetes
kubectl apply --dry-run=client -f manifest.yaml
kubectl diff -f manifest.yaml  # See changes before applying
kubeval manifest.yaml  # Validate against schema

# Terraform
terraform init
terraform fmt -recursive
terraform validate
terraform plan -out=tfplan  # ALWAYS plan before apply

# Helm
helm lint ./my-chart
helm template ./my-chart  # Render templates locally
helm install --dry-run --debug my-release ./my-chart

Post-Edit Verification

After ANY infrastructure code changes:

# Docker
docker build --no-cache -t test:latest .
docker run --rm test:latest echo "Build verified"

# Terraform
terraform fmt -check -recursive
terraform validate
terraform plan

# Kubernetes
kubectl apply --dry-run=server -f .  # Server-side validation
kubectl get events --sort-by='.lastTimestamp'  # Check for issues