单台CentOS 7上安装MongoDB集群

拼搏现实的明天。 2024-04-19 11:03 74阅读 0赞

## 检查软件包 ##

在开始安装MongoDB之前，请确认已经获得以下软件包，若没有，下载地址为：https://github.com/houwanle/blog-file/tree/master/csdn-blog/mongodb/CentOS7%E7%89%88%E5%AE%89%E8%A3%85%E5%8C%85

*  mongodb-org-server-3.6.10-1.el7.x86\_64.rpm
 *  mongodb-org-mongos-3.6.10-1.el7.x86\_64.rpm
 *  mongodb-org-shell-3.6.10-1.el7.x86\_64.rpm
 *  mongodb-org-tools-3.6.10-1.el7.x86\_64.rpm

## 查看防火墙状态 ##

运行命令：

/bin/systemctl status firewalld.service

查看防火墙是否关闭，如下图所示（白色为关闭，绿色为打开）：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70]  
或  
![在这里插入图片描述][2019091716064057.png]  
注：如果为启动状态，需要配置防火墙，打开端口：27001、27002、27003，否则无法连接MongoDB；  
或者关闭防火墙，并把 `/etc/sysconfig/selinux` 中的 SELINUX 设置为 disabled 然后重启虚拟机（注意重启后firewalld也会重启），关闭防火墙就可以了。

## 安装MongoDB ##

将MongoDB安装包通过WinSCP上传到 /usr/local 目录下，并且检查SELINUX是否已经开启，如果开启则需要关闭。

进入安装包所在的目录：

cd /usr/local

执行命令安装mongodb：

rpm -Uvh mongodb-org-server-3.6.10-1.el7.x86_64.rpm
    rpm -Uvh mongodb-org-mongos-3.6.10-1.el7.x86_64.rpm
    rpm -Uvh mongodb-org-shell-3.6.10-1.el7.x86_64.rpm
    rpm -Uvh mongodb-org-tools-3.6.10-1.el7.x86_64.rpm

修改配置文件 `/etc/mongod.conf` （可直接复制）：

# mongod.conf
    
    # for documentation of all options, see:
    #   http://docs.mongodb.org/manual/reference/configuration-options/
    
    # where to write logging data.
    systemLog:
      destination: file
      logAppend: true
      path: /var/log/mongodb/mongod1.log
      quiet: true
    
    # Where and how to store data.
    storage:
      dbPath: /var/lib/mongo/mongo1
      journal:
        enabled: true
      wiredTiger:
        engineConfig:
          cacheSizeGB: 1
    
    # how the process runs
    processManagement:
      fork: true  # fork and run in background
      pidFilePath: /var/run/mongodb/mongodb1/mongod.pid  # location of pidfile
      timeZoneInfo: /usr/share/zoneinfo
    
    # network interfaces
    net:
      port: 27001
      bindIp: 0.0.0.0  # Listen to local interface only, comment to listen on all interfaces.
    
    
    #security:
    
    #operationProfiling:
    
    replication:
      replSetName: mongodbSet
      oplogSizeMB: 1024
      enableMajorityReadConcern: false
    
    #sharding:
    
    ## Enterprise-Only Options
    
    #auditLog:
    
    #snmp:

修改服务文件`/lib/systemd/system/mongod.service` （可直接复制）：

[Unit]
    Description=High-performance, schema-free document-oriented database
    After=network.target
    Documentation=https://docs.mongodb.org/manual
    
    [Service]
    User=root
    Group=root
    Environment="OPTIONS=-f /etc/mongod.conf --keyFile=/var/lib/mongo/keyFile"
    ExecStart=/usr/bin/mongod $OPTIONS
    ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb/mongodb1
    ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb/mongodb1
    ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb/mongodb1
    ExecStartPre=/usr/bin/mkdir -p /var/lib/mongo/mongo1
    ExecStartPre=/usr/bin/chown mongod:mongod /var/lib/mongo/mongo1
    ExecStartPre=/usr/bin/chmod 0755 /var/lib/mongo/mongo1
    PermissionsStartOnly=true
    PIDFile=/var/run/mongodb/mongodb1/mongod.pid
    Type=forking
    # file size
    LimitFSIZE=infinity
    # cpu time
    LimitCPU=infinity
    # virtual memory size
    LimitAS=infinity
    # open files
    LimitNOFILE=64000
    # processes/threads
    LimitNPROC=64000
    # locked memory
    LimitMEMLOCK=infinity
    # total threads (user+kernel)
    TasksMax=infinity
    TasksAccounting=false
    # Recommended limits for for mongod as specified in
    # http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
    
    [Install]
    WantedBy=multi-user.target

执行下列命令重新加载服务配置文件：

systemctl daemon-reload

依次运行下列命令(先启动服务然后再停掉服务，用于创建相关目录)：

service mongod start
    service mongod stop

开机自动启动配置：

# 开启开机自启
    chkconfig mongod on
    
    # 关闭开机自启
    chkconfig mongod off

安装第二个mongodb  
复制/etc/mongod.conf文件为/etc/mongod2.conf，修改相关内容为（可直接复制）：

# mongod.conf
    
    # for documentation of all options, see:
    #   http://docs.mongodb.org/manual/reference/configuration-options/
    
    # where to write logging data.
    systemLog:
      destination: file
      logAppend: true
      path: /var/log/mongodb/mongod2.log
      quiet: true
    
    # Where and how to store data.
    storage:
      dbPath: /var/lib/mongo/mongo2
      journal:
        enabled: true
      wiredTiger:
        engineConfig:
          cacheSizeGB: 1
    
    # how the process runs
    processManagement:
      fork: true  # fork and run in background
      pidFilePath: /var/run/mongodb/mongodb2/mongod.pid  # location of pidfile
      timeZoneInfo: /usr/share/zoneinfo
    
    # network interfaces
    net:
      port: 27002
      bindIp: 0.0.0.0  # Listen to local interface only, comment to listen on all interfaces.
    
    
    #security:
    
    #operationProfiling:
    
    replication:
      replSetName: mongodbSet
      oplogSizeMB: 1024
      enableMajorityReadConcern: false
    
    #sharding:
    
    ## Enterprise-Only Options
    
    #auditLog:
    
    #snmp:

复制/usr/lib/systemd/system/mongod.service文件为/usr/lib/systemd/system/mongod2.service，修改相关内容为：

[Unit]
    Description=High-performance, schema-free document-oriented database
    After=network.target
    Documentation=https://docs.mongodb.org/manual
    
    [Service]
    User=root
    Group=root
    Environment="OPTIONS=-f /etc/mongod2.conf  --keyFile=/var/lib/mongo/keyFile"
    ExecStart=/usr/bin/mongod $OPTIONS
    ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb/mongodb2
    ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb/mongodb2
    ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb/mongodb2
    ExecStartPre=/usr/bin/mkdir -p /var/lib/mongo/mongo2
    ExecStartPre=/usr/bin/chown mongod:mongod /var/lib/mongo/mongo2
    ExecStartPre=/usr/bin/chmod 0755 /var/lib/mongo/mongo2
    PermissionsStartOnly=true
    PIDFile=/var/run/mongodb/mongodb2/mongod.pid
    Type=forking
    # file size
    LimitFSIZE=infinity
    # cpu time
    LimitCPU=infinity
    # virtual memory size
    LimitAS=infinity
    # open files
    LimitNOFILE=64000
    # processes/threads
    LimitNPROC=64000
    # locked memory
    LimitMEMLOCK=infinity
    # total threads (user+kernel)
    TasksMax=infinity
    TasksAccounting=false
    # Recommended limits for for mongod as specified in
    # http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
    
    [Install]
    WantedBy=multi-user.target

执行下列命令重新加载服务配置文件：

systemctl daemon-reload
    service mongod2 start
    service mongod2 stop

开机自启配置：

# 开启
    chkconfig mongod2 on
    
    # 关闭
    chkconfig mongod2 off

安装第三个mongodb（重复上面步骤，将其中的mongo2、mongod2、mongodb2对应修改为mongo3、mongod3、mongodb3）  
mongo3.conf：

# mongod.conf
    
    # for documentation of all options, see:
    #   http://docs.mongodb.org/manual/reference/configuration-options/
    
    # where to write logging data.
    systemLog:
      destination: file
      logAppend: true
      path: /var/log/mongodb/mongod3.log
      quiet: true
    
    # Where and how to store data.
    storage:
      dbPath: /var/lib/mongo/mongo3
      journal:
        enabled: true
    #  engine:
    #  mmapv1:
    #  wiredTiger:
    
    # how the process runs
    processManagement:
      fork: true  # fork and run in background
      pidFilePath: /var/run/mongodb/mongodb3/mongod.pid  # location of pidfile
      timeZoneInfo: /usr/share/zoneinfo
    
    # network interfaces
    net:
      port: 27003
      bindIp: 0.0.0.0  # Listen to local interface only, comment to listen on all interfaces.
    
    
    #security:
    
    #operationProfiling:
    
    replication:
      replSetName: mongodbSet
      oplogSizeMB: 1024
      enableMajorityReadConcern: false
    
    #sharding:
    
    ## Enterprise-Only Options
    
    #auditLog:
    
    #snmp:

mongo3.service

[Unit]
    Description=High-performance, schema-free document-oriented database
    After=network.target
    Documentation=https://docs.mongodb.org/manual
    
    [Service]
    User=root
    Group=root
    Environment="OPTIONS=-f /etc/mongod3.conf  --keyFile=/var/lib/mongo/keyFile"
    ExecStart=/usr/bin/mongod $OPTIONS
    ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb/mongodb3
    ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb/mongodb3
    ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb/mongodb3
    ExecStartPre=/usr/bin/mkdir -p /var/lib/mongo/mongo3
    ExecStartPre=/usr/bin/chown mongod:mongod /var/lib/mongo/mongo3
    ExecStartPre=/usr/bin/chmod 0755 /var/lib/mongo/mongo3
    PermissionsStartOnly=true
    PIDFile=/var/run/mongodb/mongodb3/mongod.pid
    Type=forking
    # file size
    LimitFSIZE=infinity
    # cpu time
    LimitCPU=infinity
    # virtual memory size
    LimitAS=infinity
    # open files
    LimitNOFILE=64000
    # processes/threads
    LimitNPROC=64000
    # locked memory
    LimitMEMLOCK=infinity
    # total threads (user+kernel)
    TasksMax=infinity
    TasksAccounting=false
    # Recommended limits for for mongod as specified in
    # http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
    
    [Install]
    WantedBy=multi-user.target

执行下列命令增加mongodb集群认证文件keyFile：

openssl rand -base64 745 > /var/lib/mongo/keyFile
    chmod 600 /var/lib/mongo/keyFile

执行下列命令以无需认证的方式启动集群：

mongod -f /etc/mongod.conf
    mongod -f /etc/mongod2.conf
    mongod -f /etc/mongod3.conf

执行下列命令连接到mongodb数据库：

mongo --port=27001

如图所示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 1]  
依次执行下列内容进行初始化(分两步执行)：

# 注意：需要将其中的192.166.66.195修改为实际部署的IP地址
    config = {
        
      _id : "mongodbSet",
      members : [
      {
        _id : 0, host : "192.166.66.195:27001" , priority : 2},
      {
        _id : 1, host : "192.166.66.195:27002" },
      {
        _id : 2, host : "192.166.66.195:27003" , arbiterOnly: true }
      ]
    }
    rs.initiate(config)

然后执行命令查看设置：

rs.status()

如图  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 2]  
创建管理员账号admin，普通账号omcUser和数据库meta\_admin\_config  
依次执行下面命令创建管理员  
管理员登录：

use admin

创建用户：

db.createUser( 
    {
         
        user:"admin",  
        pwd:"admin", 
        roles:[{
        role:"userAdminAnyDatabase",db:"admin"},
    		   {
        role:"clusterAdmin",db:"admin"}
    		  ] 
    } 
    );

用户授权：

db.auth("admin","admin");

创建 meta\_admin\_config 数据库，并创建用户omcUser，操作如下：  
进入 meta\_admin\_config库：

use meta_admin_config;

创建用户：

db.createUser(
    {
        
        user:"omcUser",
        pwd:"123456",
      roles:[{
        role:"readWrite",db:"meta_admin_config"}]
    }
    );

授权：

db.auth("omcUser","123456");

退出：

exit;

依次执行下面命令停止服务：

mongod -f /etc/mongod.conf --shutdown
    mongod -f /etc/mongod2.conf --shutdown
    mongod -f /etc/mongod3.conf --shutdown

依次执行下面命令重新启动服务：

service mongod start
    service mongod2 start
    service mongod3 start

至此安装和配置完毕。

使用robo3t（下载地址：https://github.com/houwanle/blog-file/tree/master/csdn-blog/mongodb/%E5%AE%A2%E6%88%B7%E7%AB%AF%E5%B7%A5%E5%85%B7）远程连接，连接成功后，mongo安装完毕。如图所示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 5]  
连接成功，mongodb安装成功。

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[2019091716064057.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/b870795a17184a00b8fe2c6069774fec.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/d99346db37ee45f9b42cdeb83dc091ec.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/d51a0b41ae5640638fa2e7eade85c290.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 3]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/8a5d6e76776840f690faa145759ec700.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 4]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/649fc6e585d24d07915170093050e45e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hvdXdhbmxl_size_16_color_FFFFFF_t_70 5]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/b4d11a99a42740cda40c84c843431d5e.png