DaemonSets

DaemonSets manage Pods and are a resource in the apps API group. They’re useful when you need a replica of a particular Pod running on every node in the cluster. Some examples include monitoring Pods and logging Pods that you need to run on every node in the cluster.

As you’d expect, it implements a controller and a watch loop. This means that you can dynamically add and remove nodes from the cluster, and the DaemonSet will ensure you always have one Pod replica on each of them.

The following command shows two DaemonSets in the kube-system namespace that exist on a newly installed 3-node cluster.

The output is trimmed so that it fits the page.