MongoDB分片搭建

我会带着你远行 2022-01-27 03:43 228阅读 0赞

### 一、环境 ###

$ cat /etc/redhat-release 
    CentOS Linux release 7.0.1406 (Core) 
    $ uname -a
    Linux zhaopin-2-201 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30 12:09:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
    $ mongo --version
    MongoDB shell version: 3.0.6
    
    node1: 172.30.2.201
    node2: 172.30.2.202
    node3: 172.30.2.203

### 二、配置Shard Server ###

在3个节点分别执行:

1.  创建目录

$ sudo mkdir -p /data/mongodb/{data/{sh0,sh1},backup/{sh0,sh1},log/{sh0,sh1},conf/{sh0,sh1}}

2.准备配置文件

第一个分片：

$ sudo vim /data/mongodb/conf/sh0/mongodb.conf
    # base
    port = 27010
    maxConns = 800 
    filePermissions = 0700
    fork = true
    noauth = true
    directoryperdb = true
    dbpath = /data/mongodb/data/sh0
    pidfilepath = /data/mongodb/data/sh0/mongodb.pid
    oplogSize = 10
    journal = true
    # security
    nohttpinterface = true
    rest = false
    # log 
    logpath = /data/mongodb/log/sh0/mongodb.log
    logRotate = rename
    logappend = true
    slowms = 50
    replSet = sh0 
    shardsvr = true

第二个分片：

$ sudo vim /data/mongodb/conf/sh1/mongodb.conf
    # base
    port = 27011
    maxConns = 800 
    filePermissions = 0700
    fork = true
    noauth = true
    directoryperdb = true
    dbpath = /data/mongodb/data/sh1
    pidfilepath = /data/mongodb/data/sh1/mongodb.pid
    oplogSize = 10
    journal = true
    # security
    nohttpinterface = true
    rest = false
    # log
    logpath = /data/mongodb/log/sh1/mongodb.log
    logRotate = rename
    logappend = true
    slowms = 50
    replSet = sh1
    shardsvr = true

3.启动Shard Server

$ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf
    about to fork child process, waiting until server is ready for connections.
    forked process: 41492
    child process started successfully, parent exiting
    $ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf
    about to fork child process, waiting until server is ready for connections.
    forked process: 41509
    child process started successfully, parent exiting
    $ ps aux | grep mongo | grep -v grep
    root     41492  0.5  0.0 518016 54604 ?        Sl   10:09   0:00 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf
    root     41509  0.5  0.0 516988 51824 ?        Sl   10:09   0:00 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf
    $ mongo --port 27010
    MongoDB shell version: 3.0.6
    connecting to: 127.0.0.1:27010/test
    >
    bye
    $ mongo --port 27011
    MongoDB shell version: 3.0.6
    connecting to: 127.0.0.1:27011/test
    >
    bye

### 三、配置Config Server ###

在3个节点分别执行:  
1.创建目录

$ sudo mkdir -p /data/mongodb/{data/cf0,backup/cf0,log/cf0,conf/cf0}

2.准备配置文件

$ sudo vim /data/mongodb/conf/cf0/config.conf
    # base
    port = 27000
    maxConns = 800
    filePermissions = 0700
    fork = true
    noauth = true
    directoryperdb = true
    dbpath = /data/mongodb/data/cf0
    pidfilepath = /data/mongodb/data/cf0/config.pid
    oplogSize = 10
    journal = true
    # security
    nohttpinterface = true
    rest = false
    # log
    logpath = /data/mongodb/log/cf0/config.log
    logRotate = rename
    logappend = true
    slowms = 50
    configsvr = true

3.启动

$ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf
    about to fork child process, waiting until server is ready for connections.
    forked process: 41759
    child process started successfully, parent exiting
    $ ps aux | grep mongo | grep -v grep
    root     41492  0.3  0.0 518016 54728 ?        Sl   10:09   0:06 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf
    root     41509  0.3  0.0 518016 54760 ?        Sl   10:09   0:06 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf
    root     41855  0.4  0.0 467828 51684 ?        Sl   10:25   0:03 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf

### 四、配置Query Routers ###

在3个节点分别执行:

1.创建目录

$ sudo mkdir -p /data/mongodb/{data/ms0,backup/ms0,log/ms0,conf/ms0}

2.准备配置文件

$ sudo vim /data/mongodb/conf/ms0/mongos.conf
    # base
    port = 30000
    maxConns = 800
    filePermissions = 0700
    fork = true
    pidfilepath = /data/mongodb/data/ms0/mongos.pid
    # log
    logpath = /data/mongodb/log/ms0/mongos.log
    logRotate = rename
    logappend = true
    configdb = 172.30.2.201:27000,172.30.2.202:27000,172.30.2.203:27000

3.启动

$ sudo /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms0/mongos.conf
    about to fork child process, waiting until server is ready for connections.
    forked process: 42233
    child process started successfully, parent exiting
    $ ps aux | grep mongo | grep -v grep
    root     41492  0.3  0.0 518016 54728 ?        Sl   10:09   0:06 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf
    root     41509  0.3  0.0 518016 54760 ?        Sl   10:09   0:07 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf
    root     41855  0.4  0.0 546724 37812 ?        Sl   10:25   0:03 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf
    root     41870  0.4  0.0 546724 38188 ?        Sl   10:25   0:03 /opt/mongodb/bin/mongod --conf
    root     42233  0.5  0.0 233536 10188 ?        Sl   10:38   0:00 /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms0/mongos.conf

### 五、初始化副本集 ###

配置副本集的好处是为了高可用，配置单节点是我自己为了节省时间，后续添加节点和副本集的操作一样，分片的配置不需要修改,在任何一个节点执行，这里在node1上执行

分片一：

$ mongo --port 27010
    MongoDB shell version: 3.0.6
    connecting to: 127.0.0.1:27010/test
    > use admin
    switched to db admin
    > cfg={_id:"sh0", members:[ {_id:0,host:"172.30.2.201:27010"}, {_id:1,host:"172.30.2.202:27010"}, {_id:2,host:"172.30.2.203:27010"} ] }
    {
            "_id" : "sh0",
            "members" : [
                    {
                            "_id" : 0,
                            "host" : "172.30.2.201:27010"
                    },
                    {
                            "_id" : 1,
                            "host" : "172.30.2.202:27010"
                    },
                    {
                            "_id" : 2,
                            "host" : "172.30.2.203:27010"
                    }
            ]
    }
    > rs.initiate( cfg );
    { "ok" : 1 }
    sh0:OTHER> rs.status()
    {
            "set" : "sh0",
            "date" : ISODate("2015-10-23T05:33:31.920Z"),
            "myState" : 1,
            "members" : [
                    {
                            "_id" : 0,
                            "name" : "172.30.2.201:27010",
                            "health" : 1,
                            "state" : 1,
                            "stateStr" : "PRIMARY",
                            "uptime" : 270,
                            "optime" : Timestamp(1445578404, 1),
                            "optimeDate" : ISODate("2015-10-23T05:33:24Z"),
                            "electionTime" : Timestamp(1445578408, 1),
                            "electionDate" : ISODate("2015-10-23T05:33:28Z"),
                            "configVersion" : 1,
                            "self" : true
                    },
                    {
                            "_id" : 1,
                            "name" : "172.30.2.202:27010",
                            "health" : 1,
                            "state" : 5,
                            "stateStr" : "STARTUP2",
                            "uptime" : 7,
                            "optime" : Timestamp(0, 0),
                            "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                            "lastHeartbeat" : ISODate("2015-10-23T05:33:30.289Z"),
                            "lastHeartbeatRecv" : ISODate("2015-10-23T05:33:30.295Z"),
                            "pingMs" : 1,
                            "configVersion" : 1
                    },
                    {
                            "_id" : 2,
                            "name" : "172.30.2.203:27010",
                            "health" : 1,
                            "state" : 5,
                            "stateStr" : "STARTUP2",
                            "uptime" : 7,
                            "optime" : Timestamp(0, 0),
                            "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                            "lastHeartbeat" : ISODate("2015-10-23T05:33:30.289Z"),
                            "lastHeartbeatRecv" : ISODate("2015-10-23T05:33:30.293Z"),
                            "pingMs" : 1,
                            "configVersion" : 1
                    }
            ],
            "ok" : 1
    }
    sh0:PRIMARY>
    bye

分片二：

$ mongo --port 27011
    MongoDB shell version: 3.0.6
    connecting to: 127.0.0.1:27011/test
    > use admin
    switched to db admin
    > cfg={_id:"sh1", members:[ {_id:0,host:"172.30.2.201:27011"}, {_id:1,host:"172.30.2.202:27011"}, {_id:2,host:"172.30.2.203:27011"} ] }
    {
            "_id" : "sh1",
            "members" : [
                    {
                            "_id" : 0,
                            "host" : "172.30.2.201:27011"
                    },
                    {
                            "_id" : 1,
                            "host" : "172.30.2.202:27011"
                    },
                    {
                            "_id" : 2,
                            "host" : "172.30.2.203:27011"
                    }
            ]
    }
    > rs.initiate( cfg );
    { "ok" : 1 }
    sh1:OTHER> rs.status();
    {
            "set" : "sh1",
            "date" : ISODate("2015-10-23T05:36:02.365Z"),
            "myState" : 1,
            "members" : [
                    {
                            "_id" : 0,
                            "name" : "172.30.2.201:27011",
                            "health" : 1,
                            "state" : 1,
                            "stateStr" : "PRIMARY",
                            "uptime" : 406,
                            "optime" : Timestamp(1445578557, 1),
                            "optimeDate" : ISODate("2015-10-23T05:35:57Z"),
                            "electionTime" : Timestamp(1445578561, 1),
                            "electionDate" : ISODate("2015-10-23T05:36:01Z"),
                            "configVersion" : 1,
                            "self" : true
                    },
                    {
                            "_id" : 1,
                            "name" : "172.30.2.202:27011",
                            "health" : 1,
                            "state" : 5,
                            "stateStr" : "STARTUP2",
                            "uptime" : 5,
                            "optime" : Timestamp(0, 0),
                            "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                            "lastHeartbeat" : ISODate("2015-10-23T05:36:01.168Z"),
                            "lastHeartbeatRecv" : ISODate("2015-10-23T05:36:01.175Z"),
                            "pingMs" : 0,
                            "configVersion" : 1
                    },
                    {
                            "_id" : 2,
                            "name" : "172.30.2.203:27011",
                            "health" : 1,
                            "state" : 5,
                            "stateStr" : "STARTUP2",
                            "uptime" : 5,
                            "optime" : Timestamp(0, 0),
                            "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                            "lastHeartbeat" : ISODate("2015-10-23T05:36:01.167Z"),
                            "lastHeartbeatRecv" : ISODate("2015-10-23T05:36:01.172Z"),
                            "pingMs" : 0,
                            "configVersion" : 1
                    }
            ],
            "ok" : 1
    }
    sh1:PRIMARY>
    bye

### 六、配置分片 ###

$ mongo --port 30000
    MongoDB shell version: 3.0.6
    connecting to: 127.0.0.1:30000/test
    mongos> use admin;
    switched to db admin
    mongos> sh.addShard("sh0/172.30.2.201:27010,172.30.2.202:27010,172.30.2.203:27010");
    { "shardAdded" : "sh0", "ok" : 1 }
    mongos> sh.addShard("sh1/172.30.2.201:27011,172.30.2.202:27011,172.30.2.203:27011");
    { "shardAdded" : "sh1", "ok" : 1 }
    mongos> use mydb;
    switched to db mydb
    mongos> db.createCollection("test");
    {
            "ok" : 1,
            "$gleStats" : {
                    "lastOpTime" : Timestamp(1444358911, 1),
                    "electionId" : ObjectId("56172a4bc03d9b1667f8e928")
            }
    }
    mongos> sh.enableSharding("mydb");
    { "ok" : 1 }
    mongos> sh.shardCollection("mydb.test", {"_id":1});
    { "collectionsharded" : "mydb.test", "ok" : 1 }
    mongos> sh.status();
    --- Sharding Status ---
      sharding version: {
            "_id" : 1,
            "minCompatibleVersion" : 5,
            "currentVersion" : 6,
            "clusterId" : ObjectId("561728b4030ea038bcb57fa0")
    }
      shards:
            {  "_id" : "sh0",  "host" : "sh0/172.30.2.201:27010,172.30.2.202:27010,172.30.2.203:27010" }
            {  "_id" : "sh1",  "host" : "sh1/172.30.2.201:27011,172.30.2.202:27011,172.30.2.203:27011" }
      balancer:
            Currently enabled:  yes
            Currently running:  no
            Failed balancer rounds in last 5 attempts:  0
            Migration Results for the last 24 hours:
                    No recent migrations
      databases:
            {  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }
            {  "_id" : "mydb",  "partitioned" : true,  "primary" : "sh0" }
                    mydb.test
                            shard key: { "_id" : 1 }
                            chunks:
                                    sh0     1
                            { "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : sh0 Timestamp(1, 0)

可见分片已经配置完成了

### 七、添加开机启动项 ###

$ sudo vim /etc/rc.local
    ulimit -SHn 65535
    /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf
    /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf
    /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf
    /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms0/mongos.conf

### 八、备注 ###

虽然也是3台机器，使用分片的好处是可以把两个分片的primary设置在不同的节点，这个可以分摊单节点的压力，当然有更多机器就可以把分片放到不同机器上。

**文章转载自 开源中国社区\[https://www.oschina.net\]**