Glab Runner Controller

glab-runner-controller

Manage GitLab runner controllers and their authentication tokens.

⚠️ Experimental Feature

Status: EXPERIMENTAL (Admin-only)

• This feature may be broken or removed without prior notice
• Use at your own risk
• Requires GitLab admin privileges
• See: https://docs.gitlab.com/policy/development_stages_support/

What It Does

Runner controllers manage the orchestration of GitLab Runners in your infrastructure. This skill provides commands to:

• Create and configure runner controllers
• Manage controller lifecycle (list, update, delete)
• Generate and rotate authentication tokens
• Revoke compromised tokens

Common Workflows

Create Runner Controller

# Create with default settings
glab runner-controller create

# Create with description
glab runner-controller create --description "Production runners"

# Create enabled controller
glab runner-controller create --description "Prod" --state enabled

States:

• disabled - Controller exists but inactive
• enabled - Controller is active (default)
• dry_run - Test mode (no actual runner execution)

List and View Controllers

# List all controllers
glab runner-controller list

# List with pagination
glab runner-controller list --page 2 --per-page 50

# Output as JSON
glab runner-controller list --output json

Update Controller

# Update description
glab runner-controller update 42 --description "Updated name"

# Change state
glab runner-controller update 42 --state disabled

# Update both
glab runner-controller update 42 --description "Prod" --state enabled

Delete Controller

# Delete with confirmation prompt
glab runner-controller delete 42

# Delete without confirmation
glab runner-controller delete 42 --force

Token Management Workflows

Token Lifecycle

Create → Rotate → Revoke is the typical token lifecycle for security best practices.

1. Create Token

# Create token for controller 42
glab runner-controller token create 42

# Create with description
glab runner-controller token create 42 --description "production"

# Output as JSON (for automation)
glab runner-controller token create 42 --output json

Important: Save the token value immediately - it's only shown once at creation.

2. List Tokens

# List all tokens for controller 42
glab runner-controller token list 42

# List as JSON
glab runner-controller token list 42 --output json

# Paginate
glab runner-controller token list 42 --page 1 --per-page 20

3. Rotate Token

Rotation generates a new token and invalidates the old one.

# Rotate token 1 (with confirmation)
glab runner-controller token rotate 42 1

# Rotate without confirmation
glab runner-controller token rotate 42 1 --force

# Rotate and output as JSON
glab runner-controller token rotate 42 1 --force --output json

Use cases:

• Scheduled rotation (security policy compliance)
• Token compromise response
• Key rotation before employee departure

4. Revoke Token

# Revoke token 1 (with confirmation)
glab runner-controller token revoke 42 1

# Revoke without confirmation
glab runner-controller token revoke 42 1 --force

When to revoke:

• Token compromised or leaked
• Controller decommissioned
• Access no longer needed

Token Security Best Practices

1. Rotate regularly - Set up scheduled rotation (e.g., every 90 days)
2. Use descriptions - Track token purpose and owner
3. Revoke immediately when compromised
4. Never commit tokens to version control
5. Use --output json for automation (parse token value securely)

Decision Tree: Controller State Selection

Do you need the controller active?
├─ Yes → --state enabled
├─ Testing configuration? → --state dry_run
└─ No (maintenance/setup) → --state disabled

Troubleshooting

"Permission denied" or "403 Forbidden":

• Runner controller commands require GitLab admin privileges
• Verify you're authenticated as an admin user
• Check glab auth status to confirm current user

"Runner controller not found":

• Verify controller ID with glab runner-controller list
• Controller may have been deleted
• Check if you have access to the correct GitLab instance

Token creation fails:

• Ensure controller exists and is enabled
• Verify admin privileges
• Check GitLab instance version (experimental features may require recent versions)

Token rotation shows old token still works:

• Token invalidation may take a few seconds to propagate
• Wait 10-30 seconds and test again
• Check controller state (disabled controllers don't enforce token validation)

Cannot delete controller:

• Check if controller has active runners
• May need to decommission runners first
• Use --force to override (⚠️ destructive)

Experimental feature not available:

• Verify glab version: glab version (requires v1.83.0+)
• Check if feature flag is enabled on GitLab instance
• Confirm GitLab instance version supports runner controllers

Pagination not working:

• Default page size is 30
• Use --per-page to adjust (max varies by instance)
• Use --page to navigate through results

Related Skills

CI/CD & Runners:

• glab-ci - View and manage CI/CD pipelines and jobs
• glab-job - Retry, cancel, view logs for individual jobs

Repository Management:

• glab-repo - Manage repositories (runner controllers are instance-level)

Authentication:

• glab-auth - Login and authentication management

Command Reference

For complete command syntax and all available flags, see:

• references/commands.md