🐳 Docker Network Troubleshooter

Scenario 1: You're trying to access a web app running in a Docker container at port 8080 from your browser, but it times out.

What's the fix?

docker run -d webapp
docker run -d -p 8080:80 webapp
docker exec webapp netstat -tulnp

Scenario 2: Two containers need to communicate over an internal Docker bridge network, but ping fails.

What's the likely fix?

docker connect container1 container2
docker network create mynet && docker network connect mynet container1 && docker network connect mynet container2
docker restart container2

Scenario 3: A container can't resolve DNS names to external services.

What's a possible solution?

docker run busybox ping 8.8.8.8
docker run --dns 8.8.8.8 busybox ping google.com
ping localhost