Claude Code
deployment
CI/CD Pipeline Missing Environment Variables
CI/CD pipeline fails during build or deployment steps because required environment variables aren't available. The application starts correctly in development where variables are set locally, but fails in the pipeline with 'variable not defined' errors.
This commonly occurs when moving configuration from .env files to CI/CD secret management, or when new required variables aren't added to all environments.
Error Messages You Might See
error: environment variable STRIPE_API_KEY is not defined
undefined variable: DATABASE_URL
Cannot start application: missing required configuration
Common Causes
- Environment variable defined in GitHub Secrets but not passed to workflow steps
- Secret name in workflow doesn't match environment variable name expected by code
- Variable scoped to wrong environment (only in staging, not in production)
- Variable definition syntax incorrect for the CI/CD platform
- Secrets not accessible to workflow due to permission/role restrictions
How to Fix It
Define all secrets in CI/CD platform. Pass secrets explicitly to build steps: env: { KEY: ${{ secrets.KEY_SECRET }} }. Use distinct names for CI/CD secret vs application env var for clarity. Document required variables in DEPLOYMENT.md. Validate variables are set before build: test -n "$REQUIRED_VAR" || exit 1.
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Get HelpFrequently Asked Questions
How to pass GitHub secrets to workflow steps?
Use: env: { VAR_NAME: ${{ secrets.SECRET_NAME }} } in the step definition.
Should secrets be different per environment?
Yes. Use separate GitHub Secrets for staging vs production (STRIPE_KEY_PROD vs STRIPE_KEY_STAGING).
How to validate variables at build time?
Add validation steps: if [ -z $API_KEY ]; then echo 'API_KEY not set'; exit 1; fi