Docker搭建Mongodb复制集

1. 启动三个Mongodb容器

docker run --name mongo0 -p 8080:27017 -d mongo  --replSet "mg-1234567"
docker run --name mongo1 -p 8081:27017 -d mongo  --replSet "mg-1234567"
docker run --name mongo2 -p 8082:27017 -d mongo  --replSet "mg-1234567"

--replSet为复制集取一个名字

2.配置复制集

选取mongo0做为master，进入容器并连接mongodb数据库

docker exec -it mongo0 bash
mongo

配置复制集

#复制集配置，有报错的话复制出来，改成一行
config = {"_id":"mg-1234567",
		  "members":[
		  {"_id":0,host:"127.0.0.1:8080"},
		  {"_id":1,host:"127.0.0.1:8081"},
		  {"_id":2,host:"127.0.0.1:8082"}
          ]
}
#初始化复制集
rs.initiate(config)
rs.status()

members数组的id必须从0开始

3.验证

mongodb://localhost:8080,localhost:8081,localhost:8082/?replicaSet=mg-1234567&readPreference=secondaryPreferred&serverSelectionTimeoutMS=5000&connectTimeoutMS=10000&3t.uriVersion=3&3t.connection.name=aliyunReplicaSet&3t.alwaysShowAuthDB=true&3t.alwaysShowDBFromUserRole=true

mongodb://localhost:8080,localhost:8081,localhost:8082/?replicaSet=mg-1234567&readPreference=secondaryPreferred&serverSelectionTimeoutMS=5000&connectTimeoutMS=10000&3t.uriVersion=3&3t.connection.name=aliyunReplicaSet&3t.alwaysShowAuthDB=true&3t.alwaysShowDBFromUserRole=true