Assigning pods to dedicated nodepool

In my cluster I have creaetd 2 nodepools. One of them I named pool-monitoring and is dedicated for monitoring (Grafana, Prometheus). I labeled the monitoring nodepool as follows: doctl kubernetes cluster node-pool update <cluster-id|cluster-name> <pool-id|pool-name> --label <key=value> After running the command kubectl get nodes --show-lables I can seen this:

2 questions: should I put this line nodeSelector: nodeSelector: pool-monitoring Should this line be in the statefullset or deployment file?

2nd question: If I update the kubernetes cluster will I lose hte labels?

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Purnima Kumari
DigitalOcean Employee
DigitalOcean Employee badge
March 15, 2023

Hi @greggyvanmeel

In order to assign a Pod to the node with the labe, you need to specify a nodeSelector field in the PodSpec

DigitalOcean Managed Kubernetes provides persistent node pool labels. Adding a custom label to a node pool ensures that the label is propagated to the worker nodes in the node pool after replacement or upgrade.

kubectl label node <node-name> <label-key>-

kubectl taint node <node-name> <taint-key>-

Note the trailing - on the key; this causes kubectl to delete the label or taint.

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