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I am setting up my local development environment with docker containers. The docker-compose.yml is like following
version: '2' services: db: image: mongo:3 mq: image: rabbitmq:3 api: build: . image: my_app/api ports: - "3000:3000" links: - db - mq environment: - NODE_ENV=development It starts without error. And docker lists 3 running containers
docker-compose up -d docker ps e90e5a8b5d33 my_app/api "/usr/local/bin/node " 0.0.0.0:3000->3000/tcp my_app_api_1 42bfcd971b16 mongo:3 "/entrypoint.sh mongo" 27017/tcp my_app_db_1 a0685a816c47 rabbitmq:3 "/docker-entrypoint.s" 4369/tcp, 5671-5672/tcp, 25672/tcp my_app_mq_1 However when I try to link to those running containers from another container
docker run --link my_app_mq_1:mq --link my_app_db_1:db -it worker I get error
docker: Error response from daemon: Cannot link to /my_app_mq_1, as it does not belong to the default network. I have also tried
docker run --link my_app_mq_1:mq --link my_app_db_1:db -it --net default worker Same error.
So how can I link to a running container started by docker-compose?
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The SSH method works fine for Docker containers, too. That said, you can SSH into a Docker container using Docker's built-in docker exec . If you do not need an interactive shell, you can also use the docker attach command to connect the host's stdin and stdout to the running container and execute remote commands.
Use docker attach to attach your terminal's standard input, output, and error (or any combination of the three) to a running container using the container's ID or name. This allows you to view its ongoing output or to control it interactively, as though the commands were running directly in your terminal.
Ok, found the answer to it. In case anyone else comes across the same problem, just do
docker network ls This command lists all the docker networks. docker-compose will create a new network when you run docker-compose up. In my case, the network is named as myapp_default.
Note: Your app’s network is given a name based on the “project name”, which is based on the name of the directory it lives in. You can override the project name with either the --project-name flag or the COMPOSE_PROJECT_NAME environment variable. Networking in Compose
So the correct way to link to those containers is
docker run --link my_app_mq_1:mq --link my_app_db_1:db -it --net myapp_default worker my command to run links
docker run --network=YOUR_NETWORK --link SERVICE -t -i app command If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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