Next, we are going to take a look at monitoring our containers and also Docker hosts. In Chapter 4, Managing Containers, we discussed the docker container top
and docker container stats
commands; you may recall that both of these commands show real-time information only; there is no historical data kept.
While this is great if you are trying to debug a problem as it is running or want to quickly get an idea of what is going on inside your containers, it is not too helpful if you need to look back at a problem: maybe you have configured your containers to restart if they have become unresponsive. While that will help with the availability of your application, it isn't much of a help if you need to look at why your container became unresponsive.
We are going to be looking at quite a complex setup. There are alternatives to this configuration, and also, there is ongoing development within the Docker community to make the configuration that we are going to be looking at more straightforward...