How do I debug a docker container problem?

How do I debug a docker container problem?

Ten tips for debugging Docker containers

1. 1 — View stdout history with the logs command.
2. 2 — Stream stdout with the attach command.
3. 3 — Execute arbitrary commands with exec.
4. 4 — Override the ENTRYPOINT.
5. 5 — Add options with the CMD.
6. 6 — Pause and unpause a container.
7. 7 — Get process stats with the top command.

Where is Docker build log?

Each log file contains information about only one container and is in JSON format. Remember, one log file per container. You find these JSON log files in the /var/lib/docker/containers/ directory on a Linux Docker host.

How do you debug a docker command?

Starting Docker in debug mode

1. Start the Docker daemon with the debug option -D . To start from the command line, you can run the following command: $ docker -d -D.
2. You can also add the –debug/-D option in the Docker configuration file to start in debug mode.

Which of the following will start Docker in debug mode?

Which of the following will start Docker in debug mode? Options are : Start the ‘dockerd’ process manually with the ‘–logging’ flag set to debug. Start the ‘dockerd’ process manually with the ‘–raw-logs’ flag set to debug.

What is difference between run and CMD?

Note: Don’t confuse RUN with CMD. RUN actually runs a command and commits the result; CMD does not execute anything at build time, but specifies the intended command for the image. RUN Command: RUN command will basically, execute the default command, when we are building the image.

Where are env variables stored in Docker?

The default is “/var/lib/docker/tmp”

How Docker pull from Artifactory?

Using Docker Client with Artifactory Cloud

1. Login to your repository use the following command with your Artifactory Cloud credentials. docker login ${server-name}.jfrog.io.
2. Pull an image using the following command.
3. Push an image by first tagging it and then using the push command.