Few tips for your Docker Environment

If you are playing around docker, there is a time when you have to take care of housekeeping job as well. In today's post, we are going to discuss different options to perform cleanup activities, just keep in mind before executing any command that few of them can destroy your whole week of work. So understand and then execute. 

 
docker system prune 

    A very nice command to cleanup all the dangling items from your docker environment, by executing this command you are agree to clean below items -

• all stopped containers
• all dangling images
• all build caches
• all dangling network 

Manage docker logs

    By default there is no limit for your docker container logs, file can be as huge as the host OS system allowed but sometime it can be tricky to go through the logs if you have to debug any issue. We can restrict the max log file size for running containers as follows - 

❯ cat /etc/docker/daemon.json

{

"log-opts": {"max-size":"10m", "max-file":"3"}

}

❯

❯ systemctl reload docker

If you don't want to change systemwide setting, you can use below flags when triggering docker run command to achieve the same.

❯ docker run container \

--log-opt max-size=10m --log-opt max-file=3 \

....

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