Docker Remove JSON Log

As a programmer, you might encounter situations where you need to remove JSON logs from Docker containers. In this article, we will explore various methods to remove JSON logs from Docker containers.

Introduction to Docker JSON Logs

When you run containers in Docker, the logs generated by them are stored in a JSON format. These logs are useful for debugging and troubleshooting purposes. However, when you run containers for a longer time, the JSON logs can consume a significant amount of disk space. Therefore, it is essential to remove them periodically.

Methods to Remove Docker JSON Logs

Method 1 - Using Docker CLI

You can use the following command to remove Docker JSON logs:

docker logs <container_name> --tail 0 --no-color | sudo tee /var/log/<container_name>.log

This command will redirect the logs to a file and clean the JSON log file. Please replace <container_name> with the actual name of your container.

Method 2 - Using Log Rotation

Another way to remove Docker JSON logs is to use log rotation. You can configure the logrotate tool to remove old logs and compress them. To do this, create a new file /etc/logrotate.d/docker-container with the following content:

/var/lib/docker/containers/*/*.log {
    rotate 5
    daily
    compress
    missingok
    delaycompress
    copytruncate
}

This configuration will rotate the logs daily and keep up to 5 compressed log files. Please note that this configuration may vary depending on your operating system and Docker version.

Conclusion

In this article, we have discussed two methods to remove Docker JSON logs. You can use either the Docker CLI command or log rotation to clean up the JSON log files. Please note that removing these logs can result in losing valuable debugging information. Therefore, it is recommended to backup the logs before deleting them.