• mongodb 分片技术


                        MongoDB Sharding Cluster 分片集群

    规划:
    10个实例:38017-38026

    (1)configserver:
    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)


    配置过程
                
    shard复制集配置:
    2.1目录创建:
    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:

    sh1:
    vi /mongodb/38021/conf/mongodb.conf
    ===============
    根据需求修改相应参数:
    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:
      port: 38021
    replication:
      oplogSizeMB: 2048
      replSetName: sh1
    sharding:
      clusterRole: shardsvr
    processManagement:
      fork: true

    ===============
    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

    sh2:
    vi /mongodb/38024/conf/mongodb.conf
    ========
    根据需求修改相应参数:
    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:
      port: 38024
    replication:
      oplogSizeMB: 2048
      replSetName: sh2
    sharding:
      clusterRole: shardsvr
    processManagement:
      fork: true
    ========


    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  



    mongo --port 38021

    use  admin
    config = {_id: 'sh1', members: [
                              {_id: 0, host: '10.0.0.53:38021'},
                              {_id: 1, host: '10.0.0.53:38022'},
                              {_id: 2, host: '10.0.0.53:38023',"arbiterOnly":true}]
               }

    rs.initiate(config)
     
     
     mongo --port 38024
     use admin
    config = {_id: 'sh2', members: [
                              {_id: 0, host: '10.0.0.53:38024'},
                              {_id: 1, host: '10.0.0.53:38025'},
                              {_id: 2, host: '10.0.0.53:38026',"arbiterOnly":true}]
               }
     
    rs.initiate(config)

    =-=----=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
    ---3、config节点配置:

    3.1目录创建:
    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:

    [mongod@server1 ~]$ vi /mongodb/38018/conf/mongodb.conf

    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:
      port: 38018
    replication:
      oplogSizeMB: 2048
      replSetName: configReplSet
    sharding:
      clusterRole: configsvr
    processManagement:
      fork: true


    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
    use  admin

     config = {_id: 'configReplSet', members: [
                              {_id: 0, host: '10.0.0.53:38018'},
                              {_id: 1, host: '10.0.0.53:38019'},
                              {_id: 2, host: '10.0.0.53:38020'}]
               }
    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、mongos节点配置:
    4.1创建目录:

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

    4.2配置文件


    vi /mongodb/38017/conf/mongos.conf
    systemLog:
      destination: file
      path: /mongodb/38017/log/mongos.log
      logAppend: true
    net:
      port: 38017
    sharding:
      configDB: configReplSet/10.0.0.53:38018,10.0.0.53:38019,10.0.0.53:38020
    processManagement:
      fork: true
             
    4.3启动mongos

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

    5、分片集群操作:

     连接到其中一个mongos(10.0.0.51),做以下配置
    (1)连接到mongs的admin数据库
    # su - mongod
    $ mongo 10.0.0.51:38017/admin

    (2)添加分片
    db.runCommand( { addshard : "sh1/10.0.0.51:38021,10.0.0.51:38022,10.0.0.51:38023",name:"shard1"} )

    db.runCommand( { addshard : "sh2/10.0.0.51:38024,10.0.0.51:38025,10.0.0.51:38026",name:"shard2"} )


    (3)列出分片
    mongos> db.runCommand( { listshards : 1 } )
     
     
    (4)整体状态查看
    mongos> sh.status();
     

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  • 原文地址:https://www.cnblogs.com/kingle-study/p/10059863.html
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