Docker Container Linking

docker-container-linking.md

Container Linking

• this is very useful if you have an app image that needs to communicate w/ 1 or more other containers (things like a web server, database(s), other app servers, etc)

Linking containers by name (legacy linking)

Steps

1. Run container w/ a name using cmd line switch docker run -d --name {container-name} {image-name}

2. Link to running container by name docker run -d -p 5000:5000 --link {other-container-name}:{alias-inside-container} {image-name}

3. Repeat for additional containers

Container (Bridge) Networks

Creates an isolated network of containers. Containers can access any other container (by name) within the network.

Steps

1. Create custom bridge network

docker network create --driver bridge {network_name}

2. Run containers in network (make sure they have their own name)

`docker run -d --net={network_name} --name {container-name} {image-name}