3个节点，1主1从1仲裁
配置文件：
port = 27017
#数据目录
dbpath = /data/db
#日志所在目录
logpath = /var/log/mongodb/mongodb.log
#logpath = /data/log/mongod.log
#日志输出方式
logappend = true
在后台启动
fork = true
0.0.0.0表示任意IP均可连接
bind_ip = 0.0.0.0
#副本集名称
replSet = rs0
是否启用认证
auth = true
设置oplog的大小(MB)
oplogSize = 2048
docker指令：docker run -itd --name mongo1 --network ghh --restart=always -v /etc/localtime:/etc/localtime:ro -v /home/opt/mongodb/db1:/data/db -v /home/opt/mongodb/db1conf:/bin/mongoconf -p 27017:27017 --privileged=true -e MONGO_INITDB_ROOT_USERNAME=admin -e MONGO_INITDB_ROOT_PASSWORD=abc123 mongo:4.0.3 -f /bin/mongoconf/mongo.conf
进入容器后指令：
use admin
db.auth('admin','abc123')
rsconf = {
... ... _id: "rs0",
... ... members: [{_id:0,host:'mongo1:27017',priority:2},
{_id:1,host:'mongo2:27017',priority:1},
{_id:2,host:'mongo3:27017',arbiterOnly:true}]}
rs.initiate(rsconf)
运行结果及报错内容
