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This is the third and final post in a series looking at CoreOS.
In my last post, we looked at the cloud-config file, running etcd in proxy mode, and some common etcd cluster setups.
In this post, we take a closer look at systemd, unit files, Fleet, and fleetctl.
systemd is an init system used by CoreOS that provides many powerful features for starting, stopping, monitoring, and restarting process. On CoreOS, systemd is used to manage the lifecycle of your Docker containers and also for different system bootstrap tasks.
Learning systemd would need a series of blog posts in itself. Here we only cover systemd to the extent that we need to run systemd units for Docker containers on CoreOS.
For more information about systemd, see the documentation.Read More