博客

1、备份数据

官方文档：https://docs.mongodb.com/manual/core/backups/

• 1.1、备份 mongodump（https://docs.mongodb.com/manual/core/backups/#back-up-with-mongodump）

mongodump -h 192.168.1.235:27017 -d test -o /home/data/dump

• 1.2、恢复备份 mongorestore

mongorestore -h 192.168.1.235:27017 -d test /home/data/dump/test

2、升级

相关文档参考：
https://docs.mongodb.com/manual/release-notes/4.0-upgrade-standalone/
https://docs.mongodb.com/manual/administration/install-on-linux/
https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/

• 2.1、创建mongodb-org-4.0.repo文件

vim /etc/yum.repos.d/mongodb-org-4.0.repo

内容如下：

[mongodb-org-4.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.0.asc

• 2.2、停止mongodb服务

service mongod stop

• 2.3、更新mongodb安装源与安装

$ sudo yum install -y mongodb-org

$ sudo yum install -y mongodb-org-4.0.10 mongodb-org-server-4.0.10 mongodb-org-shell-4.0.10 mongodb-org-mongos-4.0.10 mongodb-org-tools-4.0.10

You can specify any available version of MongoDB.
However yum upgrades the packages when a newer version becomes available.
To prevent unintended upgrades, pin the package. To pin a package, add the following exclude directive to your /etc/yum.conf file:

exclude=mongodb-org,mongodb-org-server,mongodb-org-shell,mongodb-org-mongos,mongodb-org-tools

• 2.3、设置兼容版本号 (重点)

查看当前兼容版本：

db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } ) 

设置兼容版本：

db.adminCommand( { setFeatureCompatibilityVersion: "4.0" } )

再次使用db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } ) 语句查看确认修改成功

• 常用维护命令

service mongod start    // 启动mongodb服务
service mongod status   // 检查mongodb服务状态
service mongod restart  // 重启mongodb服务
service mongod stop // 停止mongodb服务

3、配置复制集

搭建复制集，我是参考开源中国的王孟君 这位朋友的博文，非常感谢他文章。如下给出各个复制集节点关键的配置文件内容：

• rs0

  # 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: /usr/local/mongodb/rs0/logs/mongod.log
  
  # Where and how to store data.
  storage:
    dbPath: /usr/local/mongodb/rs0/data
    journal:
      enabled: true
  #  engine:
  #  mmapv1:
  #  wiredTiger:
  
  # how the process runs
  processManagement:
    fork: true  # fork and run in background
    pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile
    timeZoneInfo: /usr/share/zoneinfo
  
  # network interfaces
  net:
    port: 27017
    bindIp: 0.0.0.0  # Listen to local interface only, comment to listen on all interfaces.
  
  
  #security:
  
  #operationProfiling:
  
  replication:
    oplogSizeMB: 1024
    replSetName: sw_dev_mongodb 
  
  #sharding:
  
  ## Enterprise-Only Options
  
  #auditLog:
  
  #snmp:
  

• rs1

  # 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: /usr/local/mongodb/rs1/logs/mongod.log
  
  # Where and how to store data.
  storage:
    dbPath: /usr/local/mongodb/rs1/data
    journal:
      enabled: true
  #  engine:
  #  mmapv1:
  #  wiredTiger:
  
  # how the process runs
  processManagement:
    fork: true  # fork and run in background
    pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile
    timeZoneInfo: /usr/share/zoneinfo
  
  # network interfaces
  net:
    port: 27017
    bindIp: 0.0.0.0  # Listen to local interface only, comment to listen on all interfaces.
  
  
  #security:
  
  #operationProfiling:
  
  replication:
    oplogSizeMB: 1024
    replSetName: sw_dev_mongodb 
  
  #sharding:
  
  ## Enterprise-Only Options
  
  #auditLog:
  
  #snmp:
  

• rs2

  # 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: /usr/local/mongodb/rs2/logs/mongod.log
  
  # Where and how to store data.
  storage:
    dbPath: /usr/local/mongodb/rs2/data
    journal:
      enabled: true
  #  engine:
  #  mmapv1:
  #  wiredTiger:
  
  # how the process runs
  processManagement:
    fork: true  # fork and run in background
    pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile
    timeZoneInfo: /usr/share/zoneinfo
  
  # network interfaces
  net:
    port: 27017
    bindIp: 0.0.0.0  # Listen to local interface only, comment to listen on all interfaces.
  
  
  #security:
  
  #operationProfiling:
  
  replication:
    oplogSizeMB: 1024
    replSetName: sw_dev_mongodb 
  
  #sharding:
  
  ## Enterprise-Only Options
  
  #auditLog:
  
  #snmp:
  

本文介绍完毕。明天进步一点，积少成多！！！nice，加油！