Parks platform validates that API service continues while one control-plane node is drained for patching. Under what HA condition is this safe?
Select an answer to reveal the explanation.
Short Explanation
Rolling a control-plane node is fine when the rest of the choir can still hit majority—and clients keep dialing the VIP. Drain one brain, patch it, bring it back, while quorum holds. Do that on a lonely single-member etcd and you’ve scheduled an outage.
Full Explanation
HA control planes support rolling maintenance if etcd retains quorum and at least one healthy apiserver remains behind the shared endpoint. Draining one control-plane node at a time is a common pattern. Performing the same drain on a non-HA single control plane takes the API down.