Docker service creates many logs on your system. Each Docker container makes its own log file, and the Docker service also creates its own. If your system is running out of disk space and you see Docker container logs taking up a lot of space, this tutorial will show you how to find and clear them. You don’t need to stop the Docker container to clear its log files.
This guide will help you clear a Docker container’s log file, freeing up disk space and improving system performance. Regularly managing log files is essential, especially when running multiple containers that generate large amounts of data over time. By following these steps, you can easily reduce the size of your logs without disrupting the operation of your containers.
Clear Docker Container Logs
Here are 2 different ways to clear Docker container logs. You can pick any one of these methods to clear the logs.
1. Clear Specific Container Logs
Before you clear a specific container’s logs, you need to find its container ID or name. Run the command below to find it:
docker ps -a
Next, find the path of the log file by using the following command to inspect the container:
docker inspect –format='{{.LogPath}}’ <container_name_or_id>
This command will give you the path of the log file. Once you have the path, you can clear the log file with the following command:
truncate -s 0 /path/to/logfile
The -s 0 option sets the file size to 0, which completely clears the log file.
You can also combine the two commands into one to directly clear the log file of a Docker container. Use the following command for this:
truncate -s 0 $(docker inspect –format='{{.LogPath}}’ <container_name_or_id>)
2. Clear All Container Logs
If you want to clear the log files of all Docker containers on your system, use this command:
truncate -s 0 /var/lib/docker/containers/*/*-json.log
Wrap Up
In this tutorial, you learned how to clear the log files of a Docker container, both for individual containers and all containers at once. Managing log files is a simple but effective way to prevent your system from running out of disk space. Make it a habit to check and clear unnecessary logs regularly, that will ensure your Docker environment runs smoothly and efficiently.
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