docker-swarm容器下部署zookeeper集群不成功

因业务需要，最近在swarm下部署zookeeper集群，zoo1,zoo2,zoo3 但就是不正常。登录容器后观察：
1、2181端口正常，2888端口没启动，3888端口启动。
2、zkSever.sh status 查看状态，显示“Error contacting service. It is probably not running.”

我的docker-compose.yml样子如下：
version: '3'
services:
zoo1:
      image: zookeeper
      ports:
         - "2181:2181"
      expose:
         - "2181"
         - "2888"
         - "3888"
      environment:
         ZOO_MY_ID: 1
         ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888
      deploy:
      resources:
         limits:
            cpus: "0.5"
            memory: 2048M
      restart_policy:
         condition: on-failure
      networks:
         - webnet

zoo2:
      image: zookeeper
      ports:
         - "2182:2181"
      expose:
         - "2181"
         - "2888"
         - "3888"
      environment:
         ZOO_MY_ID: 2
         ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888
      deploy:
      replicas: 1
      resources:
         limits:
            cpus: "0.5"
            memory: 2048M
      restart_policy:
         condition: on-failure
      networks:
         - webnet

zoo3:
      image: zookeeper
      ports:
         - "2183:2181"
      expose:
         - "2181"
         - "2888"
         - "3888"
      environment:
         ZOO_MY_ID: 3
         ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888
      deploy:
      replicas: 1
      resources:
         limits:
            cpus: "0.5"
            memory: 2048M
      restart_policy:
         condition: on-failure
      networks:
         - webnet
networks:
  webnet:

说明：zookeeper是官方给出的镜像文件，在非swarm环境下完全正常。
我也曾自己做zookeeper镜像，也没成功，启动不起来，exit（0）错误，似乎不支持command:。

有类似swam容器下zookeeper成功经验的请给点建议。