安装mongodb

1. 下载安装mongodb3.4.x

   cd ~
   wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.4.2.tgz
   tar -zxvf mongodb-linux-x86_64-3.4.2.tgz
   cp -r /root/mongodb-linux-x86_64-3.4.2 /usr/local/mongodb

2. 加入环境变量

   vim /etc/profile
   export PATH=$PATH:/usr/local/mongodb/bin
   ESC
   :wq
   source /etc/profile

3. 创建数据目录

   mkdir /data/
   mkdir /data/mongodb/
   mkdir /data/mongodb/logs/
   mkdir /data/mongodb/data/

4. 修改配置文件

   vim /usr/local/mongodb/mongodb.conf
   
   fork = true
   port = 27017
   logappend=true
   nohttpinterface = false
   dbpath=/data/mongodb/data/
   logpath=/data/mongodb/logs/mongodb.log
   pidfilepath=/data/mongodb/logs/mongodb.pid
   
   ESC
   :wq

5. 启动关闭mongodb

   /usr/local/mongodb/bin/mongod --config /usr/local/mongodb/mongodb.conf
   /usr/local/mongodb/bin/mongod --config /usr/local/mongodb/mongodb.conf --shutdown

6. 开机启动mongodb

   cd /etc/systemd/system
   vim mongodb.service
   
   [Unit]
   Description=Start mongodb on boot.
   After=network.target remote-fs.target nss-lookup.target
   
   [Service]
   Type=forking
   PIDFile=/data/mongodb/logs/mongodb.pid
   ExecStart=/usr/local/mongodb/bin/mongod --config /usr/local/mongodb/mongodb.conf
   ExecReload=/bin/kill -s HUP $MAINPID
   ExecStop=/bin/kill -s QUIT $MAINPID
   PrivateTmp=true
   
   [Install]
   WantedBy=multi-user.target
   
   ESC
   :wq
   
   systemctl daemon-reload
   systemctl enable mongodb
   systemctl start mongodb

Mongodb集群(cluster)

1. 修改mongodb.conf

   vim /usr/local/mongodb/mongodb.conf
   
   fork=true
   port=27017
   logappend=true
   # 先查看本机IP($ ip addr)，再绑定内网IP
   bind_ip=192.168.1.150
   nounixsocket=false
   nohttpinterface=true
   dbpath=/data/mongodb/data/
   unixSocketPrefix=/data/mongodb/data/
   logpath=/data/mongodb/logs/mongodb.log
   pidfilepath=/data/mongodb/logs/mongodb.pid
   replSet=Rs1/192.168.1.150:27017
   
   ESC
   :wq

2. 启动mongodb

   /usr/local/mongodb/bin/mongod --config /usr/local/mongodb/mongodb.conf

3. 初始化mongodb,启动副本集

   # 查看副本集状态
   rs.status()
   
   # 1. 启动新副本集
   rs.initiate()
   
   # 2. 配置mongodb服务节点
   config_rs1={
       _id:'Rs1',members:[
           {_id:0,host:'192.168.1.149:27017',priority:1},
           {_id:1,host:'192.168.1.150:27017',priority:1}
       ]
   }
   
   # 显示当前簇
   rs.isMaster()

4. 关闭mongodb

   /usr/local/mongodb-3.4.2/bin/mongod --shutdown --config /usr/local/mongodb-3.4.2/mongodb.conf

5. Mongodb常用命令

   # 显示所有数据库
   show dbs;
   # 选中数据库
   use db_name;
   # 删除数据库
   db.dropDatabase();
   # 显示所有集合
   show collections;
   # 创建新的集合
   db.createCollection(COLLECTION_NAME, option);
   # 删除一个集合(COLLECTION_NAME)
   db.COLLECTION_NAME.drop();
   # 向集合插入数据
   db.COLLECTION_NAME.insert({name:"dog",age:2})
   # 删除数据
   db.COLLECTION_NAME.remove({})
   # 退出Mongodb
   quit;

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