Terraform

Terraform

Infrastructure as Code management.

Basic Workflow

# Initialize (download providers)
terraform init

# Plan (preview changes)
terraform plan
terraform plan -out=plan.tfplan   # save plan

# Apply
terraform apply
terraform apply plan.tfplan       # apply saved plan
terraform apply -auto-approve     # no confirmation

# Destroy
terraform destroy
terraform destroy -target=aws_instance.web   # specific resource

State

# List resources in state
terraform state list

# Resource details
terraform state show <resource>

# Move resource (refactoring)
terraform state mv <old> <new>

# Remove from state (without destroying)
terraform state rm <resource>

# Pull/Push remote state
terraform state pull > state.json
terraform state push state.json

Output & Variables

# View outputs
terraform output
terraform output -json
terraform output <name>

# Validate configuration
terraform validate

# Format code
terraform fmt
terraform fmt -recursive

Workspaces

terraform workspace list
terraform workspace new <name>
terraform workspace select <name>
terraform workspace delete <name>

Import

# Import existing resource into state
terraform import <resource_type>.<name> <id>

Tips

• Always run terraform plan before apply
• Use -target to apply specific resources
• Use terraform fmt to keep code standardized
• State is sensitive — never commit to public repos
• Use remote backend (S3, GCS) for team work

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