=ETCD操作步骤=
nohup etcd --name single-node --data-dir /tmp/etcd-data --listen-client-urls http://0.0.0.0:2379 --advertise-client-urls http://127.0.0.1:2379 &
etcdctl --endpoints=http://127.0.0.1:2379 put /name wjf
etcdctl get "" --prefix --keys-only //获取所有key
etcdctl --endpoints=http://127.0.0.1:2379 get / --prefix --keys-only
etcdctl --endpoints=http://127.0.0.1:2379 del / 集群名
=patroni==
nohup patroni pg1.yaml > pg1.log 2>&1&