Monitoring Docker containers

In this recipe, we will learn to monitor Docker containers.

How to do it…

Docker provides inbuilt monitoring with the docker stats command, which can be used to get a live stream of the resource utilization of Docker containers.

1. To monitor multiple containers at once using their respective IDs or names, use this command:

   $ docker stats mysql f9617f4b716c
   

   

   Tip

   If you need to monitor all running containers, use the following command:

   $ docker stats $(dockerps -q)
   

2. With docker logs, you can fetch logs of your application running inside a container. This can be used similarly to the tail -f command:

   $ docker logs -f ubuntu
   

3. Docker also records state change events from containers. These events include start, stop, create, kill, and so on. You can get real-time events with docker events:

   $ docker events
   

   To get past events, use the --since flag with docker events:

   $ docker events --since '2015-11-01'
   

4. You can also check the changes in the container filesystem with the docker...