I found that the default lease time (8 minutes) will easily result to the issue of cannot finding/connecting AKS cluster when restarting host. When host restart (or shut down for a while), the mgmt. cluster and working cluster VMs might re-allocate new IP address, but based on initial configuration, the ETCD/API-Server will still use old IP to bind/connect, this will mess the entire AKS cluster, so longer DHCP lease time will help to keep the configuration & cluster stable.
jaromirk
commented
3 years ago
I found that the default lease time (8 minutes) will easily result to the issue of cannot finding/connecting AKS cluster when restarting host. When host restart (or shut down for a while), the mgmt. cluster and working cluster VMs might re-allocate new IP address, but based on initial configuration, the ETCD/API-Server will still use old IP to bind/connect, this will mess the entire AKS cluster, so longer DHCP lease time will help to keep the configuration & cluster stable.