使用docker进行mongodb集群部署

使用Replica Set 的方式部署mongodb，这里我们部署一个primary，两个secondary，一个client：

首先搭建一个network bridge

docker network create mongo-network

然后再运行3个mongo容器，创建的集群名称是：mongo-rep

docker run --rm -itd --name mongo-primary --net=mongo-network mongo --replSet mongo-rep
docker run --rm -itd --name mongo-secondary1 --net=mongo-network mongo --replSet mongo-rep
docker run --rm -itd --name mongo-secondary2 --net=mongo-network mongo --replSet mongo-rep
docker run --rm -itd --name mongo-client --net=mongo-network mongo

 

查看4个容器的IP地址

docker network inspect mongo-network

结果为：

进入mongo客户端mongo-client，进行集群配置：

docker exec -it mongo-client mongo

> config = {_id:"mongo-rep", version:1, members:[{_id:0, host:"172.18.0.2:27017", priority:6}, {_id:1, host:"172.18.0.3:27017", priority:3}, {_id:2, host:"172.18.0.4:27017", priority:2}]}

配置结果：

{
	"_id" : "mongo-rep",
	"version" : 1,
	"members" : [
		{
			"_id" : 0,
			"host" : "172.18.0.2:27017",
			"priority" : 6
		},
		{
			"_id" : 1,
			"host" : "172.18.0.3:27017",
			"priority" : 3
		},
		{
			"_id" : 2,
			"host" : "172.18.0.4:27017",
			"priority" : 2
		}
	]
}

 

激活配置：

rs.initiate(config)

输出结果：

{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1598946237, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1598946237, 1)
}

分别进入三个mongo集群容器：

docker exec -it mongo-primary mongo
docker exec -it mongo-secondary1 mongo
docker exec -it mongo-secondary2 mongo

显示结果：

 

 

将mongo-primary关闭之后，两个secondary节点中有一个节点会自动成为primary节点，

docker stop mongo-primary

如下图所示：

再将mongo-primary节点启动起来，mongo-secondary1节点又会变成secondary，如下图所示：