Limit the number of pods per node

Question

I\'m trying to limit the number of pods per each node from my cluster. I managed to add a global limit per node from kubeadm init with config file:

apiVersio         


        

Answer 1

You can also set the maximum number of pods per node with the kubelet --max-pods option.

Answer 2

There is a config.yaml file at /var/lib/kubelet. This config file is generated from kubelet config map in kube-system namespace when you run kubeadm join.Partial content of the file is as below.

apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 0s
    cacheUnauthorizedTTL: 0s
clusterDNS:
- 10.96.0.10
maxPods: 10

You can change that file and add maxPods parameter and then restart kubelet on the node.

sudo systemctl restart kubelet 

Currently in kubeadm join there is no way to pass a kubelet config file.