• 5. mongodb之sharding-cluster(分片集群)搭建和配置


    0.mongodb分片思想

                            

    1.mongodb之sharding-cluster(分片集群)

      1.1 规划

    10个实例:38017-380261)configserver:38018-38020
    3台构成的复制集(1主两从,不支持arbiter)38018-38020(复制集名字configsvr)
    (2)shard节点:
    sh1:38021-23    (1主两从,其中一个节点为arbiter,复制集名字sh1)
    sh2:38024-26    (1主两从,其中一个节点为arbiter,复制集名字sh2)
    (3) mongos:
    38017

    2.sharding节点的配置过程

      2.1目录的创建

    mkdir -p /mongodb/38021/conf  /mongodb/38021/log  /mongodb/38021/data
    mkdir -p /mongodb/38022/conf  /mongodb/38022/log  /mongodb/38022/data
    mkdir -p /mongodb/38023/conf  /mongodb/38023/log  /mongodb/38023/data
    mkdir -p /mongodb/38024/conf  /mongodb/38024/log  /mongodb/38024/data
    mkdir -p /mongodb/38025/conf  /mongodb/38025/log  /mongodb/38025/data
    mkdir -p /mongodb/38026/conf  /mongodb/38026/log  /mongodb/38026/data

      2.2修改配置文件

      第一组复制集的搭建(21-23  一主一从一Arb)

    cat >  /mongodb/38021/conf/mongodb.conf  <<EOF
    systemLog:
      destination: file
      path: /mongodb/38021/log/mongodb.log   
      logAppend: true
    storage:
      journal:
        enabled: true
      dbPath: /mongodb/38021/data
      directoryPerDB: true
      #engine: wiredTiger
      wiredTiger:
        engineConfig:
          cacheSizeGB: 1
          directoryForIndexes: true
        collectionConfig:
          blockCompressor: zlib
        indexConfig:
          prefixCompression: true
    net:
      bindIp: 172.17.94.206,127.0.0.1
      port: 38021
    replication:
      oplogSizeMB: 2048
      replSetName: sh1
    sharding:
      clusterRole: shardsvr
    processManagement: 
      fork: true
    EOF
    cp  /mongodb/38021/conf/mongodb.conf  /mongodb/38022/conf/
    cp  /mongodb/38021/conf/mongodb.conf  /mongodb/38023/conf/
    
    sed 's#38021#38022#g' /mongodb/38022/conf/mongodb.conf -i
    sed 's#38021#38023#g' /mongodb/38023/conf/mongodb.conf -i

      第二组复制集的搭建(24-26  一主一从一Arb) 

    cat > /mongodb/38024/conf/mongodb.conf <<EOF
    systemLog:
      destination: file
      path: /mongodb/38024/log/mongodb.log   
      logAppend: true
    storage:
      journal:
        enabled: true
      dbPath: /mongodb/38024/data
      directoryPerDB: true
      wiredTiger:
        engineConfig:
          cacheSizeGB: 1
          directoryForIndexes: true
        collectionConfig:
          blockCompressor: zlib
        indexConfig:
          prefixCompression: true
    net:
      bindIp: 172.17.94.206,127.0.0.1
      port: 38024
    replication:
      oplogSizeMB: 2048
      replSetName: sh2
    sharding:
      clusterRole: shardsvr
    processManagement: 
      fork: true
    EOF
    
    cp  /mongodb/38024/conf/mongodb.conf  /mongodb/38025/conf/
    cp  /mongodb/38024/conf/mongodb.conf  /mongodb/38026/conf/
    sed 's#38024#38025#g' /mongodb/38025/conf/mongodb.conf -i
    sed 's#38024#38026#g' /mongodb/38026/conf/mongodb.conf -i

      2.3启动所有节点,并搭建复制集

    mongod -f  /mongodb/38021/conf/mongodb.conf 
    mongod -f  /mongodb/38022/conf/mongodb.conf 
    mongod -f  /mongodb/38023/conf/mongodb.conf 
    mongod -f  /mongodb/38024/conf/mongodb.conf 
    mongod -f  /mongodb/38025/conf/mongodb.conf 
    mongod -f  /mongodb/38026/conf/mongodb.conf  
    ps -ef |grep mongod  ####可以通过这个命令查询出所有的mongod的后端启动情况
    
    mongo --port 38021 admin
    
    config = {_id: 'sh1', members: [
                              {_id: 0, host: '172.17.94.206:38021'},
                              {_id: 1, host: '172.17.94.206:38022'},
                              {_id: 2, host: '172.17.94.206:38023',"arbiterOnly":true}]
               }
    
    rs.initiate(config)
      
     mongo --port 38024 admin
     
    config = {_id: 'sh2', members: [
                              {_id: 0, host: '172.17.94.206:38024'},
                              {_id: 1, host: '172.17.94.206:38025'},
                              {_id: 2, host: '172.17.94.206:38026',"arbiterOnly":true}]
               }
      
    rs.initiate(config)

    3.configserver节点

      3.1 创建目录

    mkdir -p /mongodb/38018/conf  /mongodb/38018/log  /mongodb/38018/data
    mkdir -p /mongodb/38019/conf  /mongodb/38019/log  /mongodb/38019/data
    mkdir -p /mongodb/38020/conf  /mongodb/38020/log  /mongodb/38020/data

      3.2 修改配置文件

    cat > /mongodb/38018/conf/mongodb.conf <<EOF
    systemLog:
      destination: file
      path: /mongodb/38018/log/mongodb.conf
      logAppend: true
    storage:
      journal:
        enabled: true
      dbPath: /mongodb/38018/data
      directoryPerDB: true
      #engine: wiredTiger
      wiredTiger:
        engineConfig:
          cacheSizeGB: 1
          directoryForIndexes: true
        collectionConfig:
          blockCompressor: zlib
        indexConfig:
          prefixCompression: true
    net:
      bindIp: 172.17.94.206,127.0.0.1
      port: 38018
    replication:
      oplogSizeMB: 2048
      replSetName: configReplSet
    sharding:
      clusterRole: configsvr
    processManagement: 
      fork: true
    EOF
    
    cp /mongodb/38018/conf/mongodb.conf /mongodb/38019/conf/
    cp /mongodb/38018/conf/mongodb.conf /mongodb/38020/conf/
    sed 's#38018#38019#g' /mongodb/38019/conf/mongodb.conf -i
    sed 's#38018#38020#g' /mongodb/38020/conf/mongodb.conf -i

      3.3启动节点并配置复制集

    mongod -f /mongodb/38018/conf/mongodb.conf 
    mongod -f /mongodb/38019/conf/mongodb.conf 
    mongod -f /mongodb/38020/conf/mongodb.conf 
    
    mongo --port 38018  admin
     config = {_id: 'configReplSet', members: [
                              {_id: 0, host: '172.17.94.206:38018'},
                              {_id: 1, host: '172.17.94.206:38019'},
                              {_id: 2, host: '172.17.94.206:38020'}]
               }
    rs.initiate(config)  
      
    注:configserver 可以是一个节点,官方建议复制集。configserver不能有arbiter。
    新版本中,要求必须是复制集。
    注:mongodb 3.4之后,虽然要求config server为replica set,但是不支持arbiter

    4. mongo节点的配置

      4.1创建目录 

    mkdir -p /mongodb/38017/conf  /mongodb/38017/log 

      4.2配置文件

    cat > /mongodb/38017/conf/mongos.conf <<EOF
    systemLog:
      destination: file
      path: /mongodb/38017/log/mongos.log
      logAppend: true
    net:
      bindIp: 172.17.94.206,127.0.0.1
      port: 38017
    sharding:
      configDB: configReplSet/172.17.94.206:38018,172.17.94.206:38019,172.17.94.206:38020
    processManagement: 
      fork: true
    EOF

      4.3 启动mongos

     mongos -f /mongodb/38017/conf/mongos.conf 

     

    5. 分片集群添加节点

     连接到其中一个mongos(172.17.94.206),做以下配置
    (1)连接到mongs的admin数据库
    # su - mongod
    $ mongo 172.17.94.206:38017/admin
    (2)添加分片
    db.runCommand( { addshard : "sh1/172.17.94.206:38021,172.17.94.206:38022,172.17.94.206:38023",name:"shard1"} )
    db.runCommand( { addshard : "sh2/172.17.94.206:38024,172.17.94.206:38025,172.17.94.206:38026",name:"shard2"} )
    (3)列出分片
    mongos> db.runCommand( { listshards : 1 } )
    (4)整体状态查看
    mongos> sh.status();

    6.chunk的拆分和迁移

      

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  • 原文地址:https://www.cnblogs.com/zmc60/p/13955505.html
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