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. 修改目录权限

    useradd mongodb
    chown -R mongodb:mongodb /data/mongodb
    chown -R mongodb:mongodb /usr/local/mongodb
   

6. 开机启动mongodb

    cd /etc/systemd/system
    vim mongodb.service
   
    [Unit]
    Description=Start mongodb on boot.
    After=default.target network.target
   
    [Service]
    User=mongodb
    Group=mongodb
    Type=forking
    ExecStart=/usr/local/mongodb/bin/mongod --config /usr/local/mongodb/mongodb.conf
    PrivateTmp=true
    Restart=always
   
    [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
    nounixsocket=false
    nohttpinterface=true
    dbpath=/data/mongodb/data/
    unixSocketPrefix=/data/mongodb/data/
    logpath=/data/mongodb/logs/mongodb.log
    pidfilepath=/data/mongodb/logs/mongodb.pid
    # 先查看本机IP($ ip addr)，再绑定内网IP
    bind_ip=192.168.1.150
    replSet=Rs1/192.168.1.150:27017
   
    ESC
    :wq
   

2. 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
   

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;