# When changes require redeployment

> When you make changes to your application's configuration like environment variables, domains, or services, these changes won't take effect immediately. Instead, your application will be marked as needing deployment, and you'll need to trigger a new deployment to apply all pending changes.

When changes require redeployment
---------------------------------

Your application needs to be redeployed whenever certain changes are made. Here's a complete list of what requires a new deployment:

### 1. Environment variables

- **Adding new secrets** - When you add environment variables to your application
- **Updating secret values** - When you change the value of existing environment variables
- **Deleting secrets** - When you remove environment variables from your application

### 2. Custom domains

- **Adding domains** - When you attach a new custom domain to your application
- **Removing domains** - When you detach a custom domain from your application

### 3. Build configuration

- **Build commands** - When you modify commands that run during image construction
- **Init commands** - When you change commands that run before starting your application

### 4. PHP configuration

- **PHP version** - When you change the PHP version (8.5, 8.4, 8.3, 8.2, 8.1)
- **PHP extensions** - When you add or remove PHP extensions
- **PHP settings** - When you modify php.ini configuration values

### 5. Application services

- **Adding services** - When you add databases, caches, or other services
- **Service types include:**
    
    
    - MySQL database
    - PostgreSQL database
    - MongoDB database
    - Redis cache
    - Valkey cache
    - RabbitMQ message queue
    - MinIO object storage
    - SFTP server
    - Background workers

### 6. Resource configuration

- **CPU allocation** - When you change CPU request values (e.g., 500m, 1)
- **Memory allocation** - When you change memory request values (e.g., 512Mi, 1Gi)
- **Scheduler** - When you enable or disable the cron scheduler
- **Node.js version** - When you change or set the Node.js version

### 7. Application settings

- **Application name** - When you rename your application