Terraform Skill

Terraform Skill

Terraform infrastructure as code management with native CLI integration.

Overview

This skill provides comprehensive Terraform operations through the native terraform CLI. It wraps terraform commands and returns them for host execution, enabling IaC management for cloud infrastructure.

Requirements

• terraform must be installed and in PATH
• Appropriate cloud provider credentials configured (AWS, GCP, Azure, etc.)
• Valid Terraform configuration files in working directory

Tools

Core Workflow (8 tools)

init

Initialize a Terraform working directory.

Parameters:

• backend (boolean, optional): Configure backend (default: true)
• backend_config (string, optional): Backend configuration (key=value format)
• upgrade (boolean, optional): Upgrade modules and plugins
• reconfigure (boolean, optional): Reconfigure backend, ignoring saved configuration
• migrate_state (boolean, optional): Migrate state to new backend

Example:

{"upgrade": true}

plan

Generate and show an execution plan.

Parameters:

• out (string, optional): Save plan to file
• var (string, optional): Variables (key=value,key2=value2 format)
• var_file (string, optional): Variable file path
• target (string, optional): Target specific resources (comma-separated)
• destroy (boolean, optional): Plan for destroy
• refresh (boolean, optional): Refresh state before planning (default: true)
• detailed_exitcode (boolean, optional): Return detailed exit codes

Example:

{"out": "tfplan", "var": "environment=staging,region=us-west-2"}

apply

Apply changes to infrastructure.

Parameters:

• plan_file (string, optional): Apply a saved plan file
• auto_approve (boolean, optional): Skip interactive approval
• var (string, optional): Variables (key=value,key2=value2 format)
• var_file (string, optional): Variable file path
• target (string, optional): Target specific resources (comma-separated)
• parallelism (number, optional): Number of parallel operations
• refresh (boolean, optional): Refresh state before applying (default: true)

Example:

{"plan_file": "tfplan", "auto_approve": true}

destroy

Destroy Terraform-managed infrastructure.

Parameters:

• auto_approve (boolean, optional): Skip interactive approval
• var (string, optional): Variables (key=value,key2=value2 format)
• var_file (string, optional): Variable file path
• target (string, optional): Target specific resources (comma-separated)
• parallelism (number, optional): Number of parallel operations

Example:

{"target": "aws_instance.web", "auto_approve": true}

validate

Validate the Terraform configuration files.

Parameters:

• json (boolean, optional): Output in JSON format

Example:

{"json": true}

fmt

Format Terraform configuration files.

Parameters:

• check (boolean, optional): Check if files are formatted (no changes)
• diff (boolean, optional): Display diff of changes
• recursive (boolean, optional): Process subdirectories
• write (boolean, optional): Write changes to files (default: true)

Example:

{"check": true, "recursive": true}

output

Show output values from state.

Parameters:

• name (string, optional): Specific output to show
• json (boolean, optional): Output in JSON format
• raw (boolean, optional): Output raw value (for single output)
• state (string, optional): Path to state file

Example:

{"name": "instance_ip", "raw": true}

show

Show current state or a saved plan.

Parameters:

• plan_file (string, optional): Show a saved plan file
• json (boolean, optional): Output in JSON format

Example:

{"plan_file": "tfplan", "json": true}

State Management (6 tools)

state-list

List resources in the state.

Parameters:

• address (string, optional): Filter by address pattern
• state (string, optional): Path to state file
• id (string, optional): Filter by resource ID

Example:

{"address": "module.vpc"}

state-show

Show attributes of a single resource in the state.

Parameters:

• address (string, required): Resource address
• state (string, optional): Path to state file

Example:

{"address": "aws_instance.web"}

state-mv

Move a resource in the state.

Parameters:

• source (string, required): Source resource address
• destination (string, required): Destination resource address
• state (string, optional): Path to state file
• dry_run (boolean, optional): Preview the move without making changes

Example:

{
  "source": "aws_instance.old",
  "destination": "aws_instance.new",
  "dry_run": true
}

state-rm

Remove resources from the state.

Parameters:

• address (string, required): Resource addresses (comma-separated)
• state (string, optional): Path to state file
• dry_run (boolean, optional): Preview the removal without making changes

Example:

{"address": "aws_instance.temp,aws_security_group.temp", "dry_run": true}

state-pull

Pull current state and output to stdout.

Parameters: None

state-push

Push local state to remote backend.

Parameters:

• state_file (string, required): Path to state file to push
• force (boolean, optional): Force push even with newer remote state

Example:

{"state_file": "terraform.tfstate"}

Resource Management (4 tools)

import

Import existing infrastructure into Terraform state.

Parameters:

• address (string, required): Resource address to import into
• id (string, required): Resource ID in the provider
• var (string, optional): Variables (key=value,key2=value2 format)
• var_file (string, optional): Variable file path
• config (string, optional): Path to Terraform configuration

Example:

{"address": "aws_instance.web", "id": "i-1234567890abcdef0"}

refresh

Update local state file against real resources.

Parameters:

• var (string, optional): Variables (key=value,key2=value2 format)
• var_file (string, optional): Variable file path
• target (string, optional): Target specific resources (comma-separated)

Example:

{"target": "aws_instance.web"}

taint

Mark a resource for recreation on next apply.

Parameters:

• address (string, required): Resource address to taint
• state (string, optional): Path to state file

Example:

{"address": "aws_instance.web"}

untaint

Remove the taint from a resource.

Parameters:

• address (string, required): Resource address to untaint
• state (string, optional): Path to state file

Example:

{"address": "aws_instance.web"}

Workspace Management (2 tools)

workspace-list

List available workspaces.

Parameters: None

workspace-select

Select or create a workspace.

Parameters:

• name (string, required): Workspace name
• create (boolean, optional): Create workspace if it doesn't exist

Examples:

// Select existing workspace
{"name": "production"}

// Create new workspace
{"name": "staging", "create": true}

Security

This skill includes security considerations:

1. Force Operations: force flag for state-push is allowed but logged as a warning
2. Destructive Operations: destroy with auto_approve is allowed but logged as a warning
3. Force-unlock: Intentionally not exposed as it's too dangerous for automated use
4. Non-interactive: All commands include -input=false to prevent hanging

Configuration

No configuration required. Terraform uses:

• Provider credentials from environment (AWS_ACCESS_KEY_ID, GOOGLE_CREDENTIALS, etc.)
• Backend configuration from Terraform files
• Workspace from working directory

Optional environment variable:

• TERRAFORM_CMD: Path to terraform executable (default: terraform)

Workflow Examples

Basic Infrastructure Deployment

# Initialize
skill run terraform-skill init

# Plan changes
skill run terraform-skill plan --out tfplan

# Apply changes
skill run terraform-skill apply --plan_file tfplan

Multi-Environment with Workspaces

# Create staging workspace
skill run terraform-skill workspace-select --name staging --create true

# Plan with environment-specific variables
skill run terraform-skill plan --var_file staging.tfvars --out staging.tfplan

# Apply
skill run terraform-skill apply --plan_file staging.tfplan

State Management

# List all resources
skill run terraform-skill state-list

# Move a resource
skill run terraform-skill state-mv --source module.old.aws_instance.web --destination aws_instance.web --dry_run true

# Import existing resource
skill run terraform-skill import --address aws_instance.imported --id i-1234567890abcdef0