How do you find the cluster & service CIDR of a Kubernetes cluster?

Question

How do you find the cluster/service CIDR for a Kubernetes cluster, once it is already running?

I know for Minikube, it is 10.0.0.1/24.

For GKE, you can find out via

gcloud container clusters describe XXXXXXX --zone=XXXXXX |   grep -e clusterIpv4Cidr -e servicesIpv4Cidr 

But how do you find out on a generic Kubernetes cluster, particularly via kubectl?

Answer 1

Get Services IPs range

kubectl cluster-info dump | grep -m 1 service-cluster-ip-range 

You will see something like e.g. --service-cluster-ip-range=xxx.yy.0.0/13

Get Pods IPs range

kubectl cluster-info dump | grep -m 1 cluster-cidr 

You will see something like e.g. --cluster-cidr=xxx.yy.0.0/11