How to View Specific Docker Compose Service Logs
When using docker-compose up, we can see the logs for all the containers in our YAML file; however, if we specify a particular container service, the output will not show any service dependencies on the logs. Therefore, this article will discuss how to correctly export and output Docker Compose service logs.
View Specific Docker Compose Service Logs
You can start Docker Compose in detached mode and attach yourself to the logs of all containers later. Then, if you are done watching the logs trail, you can detach from the logs output without shutting down your services.
Follow the steps below to accomplish this:
-
Use
docker-compose up -dto start all services in detached mode using the-doption. -
Use
docker-compose logs -t -fto attach yourself to the logs of all running services. The-toption gives us timestamps, while the-fparameter means we follow the log output while the services run. -
Use Ctrl+Z or Ctrl+C to detach yourself from the log output without shutting down your running containers.
-
If we need to specify the logs of a single container, we can use the command below:
docker-compose logs -t -f <service name> -
To save the output to a file, we can
stdoutusing the>>operator and append them at the end of our command.docker-compose logs -t -f >> sample.log
Use Docker Compose V2
As of Docker Compose version 2, we can now use docker-compose without the dash (-). We can also use most of the docker-compose commands, which can also be called the similarly without the dashes:
docker compose logs -t -f --tail 3 sample-service test-service >> sample.log
Marion specializes in anything Microsoft-related and always tries to work and apply code in an IT infrastructure.
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