server: Refactor health checks
server: Refactor health checks

etcd-io/etcd,mkumatag/etcd,mqliang/etcd,ajityagaty/etcd,etcd-io/etcd,rnaveiras/etcd,mqliang/etcd,mqliang/etcd,ajityagaty/etcd,rnaveiras/etcd,mkumatag/etcd,rnaveiras/etcd,ajityagaty/etcd,mkumatag/etcd,etcd-io/etcd