kubernetes-training

Main duty

Examples

Node Controller

• takes status of Node via kube-apiserver every 5 secs to monitor health of node. Grace period is 40s before a node is marked unreachable
• 

Replication Controller

• Watch out for numbers of replica within a replica set and make sure it meets the desire replicas.

Controller varieties

• A lot of components within the K8s cluster are implemented using controller

Kube-Controller-Manager

Installing

• Different types of controllers can be enabled by admin.

[!Note] controller-manager-options can be viewed under:

• etc/systemd/system/kube-controller-manager.service
• ps -aux | grep kube-controller-manager