Help Needed with ECS Deployment: Healthy Services and Database Setup

It's likely a startup issue. AWS can make it hard to find logs, but there’s usually a link from the startup failure page. Make sure your containers run well locally first—using Docker Compose for testing, including the database, is a great way to catch problems before deploying.

Are you using EC2 or Fargate for deployment? Fargate abstracts a lot of setup complexity, making things easier if you're new to ECS.

First off, check what’s causing the unhealthy status. Are the health checks on your image failing, or is it the load balancer? Diving into the logs will give you a clearer picture. If you can share more details, that would help a lot!

Also, verify the path your target group in the load balancer uses for health checks, like /api/health. That could be affecting your service's health status.

Be sure all containers in your Task are healthy—check the AWS docs on health checks for ECS. If the Task won't start, something’s off in your task definition. It’s a good idea to run it as a Task first before deploying it as a Service. If tasks are running but the service is failing, you may have a capacity problem—verify your ECS Cluster settings and ensure they match your required setup.

When your service shows as unhealthy, it might mean the LoadBalancer can’t reach your service at all. Check your security policy to ensure the right ports are open. That accounts for about 99% of these issues. The remaining 1% is usually related to missing environment variables needed for startup.