# talk to each other directly.
#
# [{ "cluster_name": "cluster1","pod_subnet": "10.10.0.0/16","svc_subnet": "10.255.10.0/24","network_id": "0" },
#  { "cluster_name": "cluster2","pod_subnet": "10.20.0.0/16","svc_subnet": "10.255.20.0/24","network_id": "0" },
#  { "cluster_name": "cluster3","pod_subnet": "10.30.0.0/16","svc_subnet": "10.255.30.0/24","network_id": "1" }]
function load_cluster_topology() {

  - Please adapt your workloads to tolerate the same future taint preemptively.
    
- Kubeadm: improve the validation of serviceSubnet and podSubnet.
  ServiceSubnet has to be limited in size, due to implementation details, and the mask can not allocate more than 20 bits.
  PodSubnet validates against the corresponding cluster "--node-cidr-mask-size" of the kube-controller-manager, it fail if the values are not compatible.

- kubeadm: use the `--pod-network-cidr` flag to init or use the podSubnet field in the kubeadm config to pass a comma separated list of pod CIDRs. ([#79033](https://github.com/kubernetes/kubernetes/pull/79033), [@Arvinderpal](https://github.com/Arvinderpal))