一、安装docker、docker-compose
1、不会安装docker的请移步----》centos7安装docker Ubantu16.04安装docker
2、安装docker-compose(Centos7环境无pip的----》centos7安装pip2)
pip install docker-compose
二、创建副本集所需的key
mkdir mongod && cd mongod
openssl rand -base64 756 > mongo.key
docker volume create mongod_mongo_key
MONGO_KEY_DIR=`docker volume inspect mongod_mongo_key | grep Mount | sed -r 's#.*"(.*)",$#\1#'`
cp mongo.key $MONGO_KEY_DIR
chmod 400 $MONGO_KEY_DIR/mongo.key
chown 999.999 $MONGO_KEY_DIR/mongo.key
mkdir /data/mongo/mongdb{1..3} -pv
三、创建docker-compose文件
#映射/data/mongo/mongdb{1,2,3}目录到容器里，将数据持久化到磁盘
#映射出三个端口，以便外部用户连接
#MONGO_INITDB_ROOT_USERNAME：管理员用户的账号
#MONGO_INITDB_ROOT_PASSWORD：管理员用户的密码
cat << EOF > docker-compose.yaml
version: "3.7"
services:
mongodb1:
image: mongo:4.0.3
container_name: mongodb1
networks:
- mongodb
ports:
- "27017:27017"
environment:
- MONGO_INITDB_ROOT_USERNAME=root
- MONGO_INITDB_ROOT_PASSWORD=123456x
volumes:
- /data/mongo/mongdb1:/data/db
- mongo_key:/mongo
command: ["mongod","--replSet","BigBoss","--keyFile","/mongo/mongo.key","--directoryperdb"]
mongodb2:
image: mongo:4.0.3
container_name: mongodb2
networks:
- mongodb
ports:
- "27018:27017"
environment:
- MONGO_INITDB_ROOT_USERNAME=root
- MONGO_INITDB_ROOT_PASSWORD=123456x
volumes:
- /data/mongo/mongdb2:/data/db
- mongo_key:/mongo
command: ["mongod","--replSet","BigBoss","--keyFile","/mongo/mongo.key","--directoryperdb"]
mongodb3:
image: mongo:4.0.3
container_name: mongodb3
networks:
- mongodb
ports:
- "27019:27017"
environment:
- MONGO_INITDB_ROOT_USERNAME=root
- MONGO_INITDB_ROOT_PASSWORD=123456x
volumes:
- /data/mongo/mongdb3:/data/db
- mongo_key:/mongo
command: ["mongod","--replSet","BigBoss","--keyFile","/mongo/mongo.key","--directoryperdb"]
networks:
mongodb:
driver: bridge
name: mongodb
volumes:
mongo_key:
EOF
四、启动副本集
1、拉取mongo4.0的镜像
docker pull mongo:4.0.3我这失败了一次，后面查了一下mongo镜像docker search mongo,docker官网是有这个镜像的，然后有拉取了一次
2、执行docker-compose文件，在docker-compose.yaml同级目录下执行
docker-compose up -d
3、连接mongodb1容器，开始配置集群
docker exec -it mongodb1 mongo -uroot -p123456x --authenticationDatabase admin
#三节点，其中一个为投票节点，并隐藏
#注意host的IP地址，一定要让客户端也能连接所有的地址
#_id的值为--replSet参数后的字符串
rs.initiate(
{
_id: "BigBoss",
version: 1,
protocolVersion: 1,
writeConcernMajorityJournalDefault: true,
members: [
{
_id: 0,
host: "mongodb1:27017",
arbiterOnly: false,
buildIndexes: true,
hidden: false,
priority: 66,
tags: {
BigBoss: "YES"
},
slaveDelay: 0,
votes: 1
},
{
_id: 1,
host: "mongodb2:27017",
arbiterOnly: false,
buildIndexes: true,
hidden: false,
priority: 55,
tags: {
BigBoss: "NO"
},
slaveDelay: 0,
votes: 1
},
{
_id: 2,
host: "mongodb3:27017",
arbiterOnly: true,
buildIndexes: true,
hidden: true,
priority: 0,
tags: {
},
slaveDelay: 0,
votes: 1
}
],
settings: {
chainingAllowed : true,
}
}
)
4、查看状态
rs.status()
五、检测
1、进入mongodb2容器中
docker exec -it mongodb2 mongo -uroot -p123456x --authenticationDatabase admin
2、停止PRIMARY的容器
docker stop mongodb1
3、连接mongdb2容器查看状态是否改变
docker exec -it mongodb2 mongo -uroot -p123456x --authenticationDatabase admin
