Question

A CI job runs your test suite directly on the GitHub-hosted runner (not inside a container). You add a Redis service container to the job using `services:` and map `ports: - 6379:6379`. Health checks pass. From within the test step, which host and port should your application code use to connect to Redis?

Accepted Answer

Connect to `localhost:6379`, since the mapped port is published to the runner host

Answer

Connect to `redis:6379`, using the service label as the hostname

Answer

Connect to `redis:6379`, using Docker's internal bridge network from the runner host

Answer

Connect to the container's internal IP address obtained via `docker inspect`