I've probably blogged about this before, but, today, I'm tinkering with Kubernetes ( well, OpenShift Container Platform ) nodes, in terms of understanding what taints are applied to what nodes, in order that I can assign pods accordingly.
This command was immensely useful: -
kubectl get nodes -o custom-columns=NAME:.metadata.name,TAINTS:.spec.taints
NAME TAINTS
192.168.0.4 <none>
192.168.16.4 [map[effect:NoExecute key:dedicated value:transit]]
192.168.20.4 [map[effect:NoExecute key:dedicated value:transit]]
192.168.24.4 [map[effect:NoExecute key:dedicated value:transit]]
192.168.32.4 [map[effect:NoExecute key:dedicated value:edge]]
192.168.36.4 [map[effect:NoExecute key:dedicated value:edge]]
192.168.4.4 <none>
192.168.40.4 [map[effect:NoExecute key:dedicated value:edge]]
192.168.8.4 <none>
192.168.0.4 <none>
192.168.16.4 [map[effect:NoExecute key:dedicated value:transit]]
192.168.20.4 [map[effect:NoExecute key:dedicated value:transit]]
192.168.24.4 [map[effect:NoExecute key:dedicated value:transit]]
192.168.32.4 [map[effect:NoExecute key:dedicated value:edge]]
192.168.36.4 [map[effect:NoExecute key:dedicated value:edge]]
192.168.4.4 <none>
192.168.40.4 [map[effect:NoExecute key:dedicated value:edge]]
192.168.8.4 <none>
with thanks to StackOverflow: -
The official Kubernetes documentation has much to say about taints: -