| title | notetype | date |
|---|---|---|
K8S Node Controller |
feed |
07-11-2021 |
Node Controller is responsible for monitoring the status of the [[K8S Node]]s and keeping them in the desired state. It does this through the [[K8S Apiserver]].
This is the workflow by which Node Controller works:
- If a new node is created, Node Controller will assign it a [[CIDR]] block.
- it checks the status of the nodes every 5 seconds
- if it stops receiving heartbeat from a node, that node is marked as unreachable after the grace period of 40 seconds
- after it's marked unreachable, it has 5 minutes to come back up
- if it doesn't, pods get evicted from that node, and get provisioned to the healthy ones (if they are a part of a [[K8S Replicaset]])
Status: #💡
References: