主节点上etcd启动失败
etcd启动流程：1、先关闭slave节点上的etcd。2、再启动master上的etcd ,等待master上的etcd启动完成后再启动 slave上的etcd
健康检查：
1、cd /opt/etcd/ssl/
2、[root@docker ssl]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem \
--endpoints="https://192.168.1.13:2379,https://192.168.1.23:2379,https://192.168.1.24:2379" cluster-health
以下为正常
member 86ab7347ef3517f6 is healthy: got healthy result from https://192.168.1.23:2379
member b08a644fd7247c5e is healthy: got healthy result from https://192.168.1.13:2379
member d5c3beb629639303 is healthy: got healthy result from https://192.168.1.24:2379
cluster is healthy