Tools, FAQ, Tutorials:
"docker container logs" - Fetch Logs
How to fetch log messages from a container with the "docker container logs" command?
✍: FYIcenter.com
Most Docker container applications print log messages to its console to report statuses and debug information.
You can fetch log messages from a container with the "docker container logs" command at any time, even after it's been stopped.
1. Create a new container from the "hello-world" image and run it. You see log messages printed, because the "docker container run" command attaches the container console by default.
fyicenter$ docker container run --name my_hello hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world 1b930d010525: Pull complete Digest: sha256:6f744a2005b12a704d2608d8070a494ad1145636eeb74a570c56b94d94ccdbfc Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://hub.docker.com/ For more examples and ideas, visit: https://docs.docker.com/get-started/
2. Check the new container status. You see the container has exited from its execution. It is stopped now.
fyicenter$ docker container list --latest CONTAINER ID IMAGE COMMAND STATUS NAMES 54e2e688aa2f hello-world "/hello" Exited (0) 5 seconds ago awesome_chandrasekhar
3. Fetch log messages from the stopped container.
fyicenter$ docker container logs my_hello Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://hub.docker.com/ For more examples and ideas, visit: https://docs.docker.com/get-started/
As you can see, we can fetch log messages at any time from a container.
⇐ "docker container run --name" - Run Container with Name
2019-04-29, 1027🔥, 0💬
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