linux下mongodb集群搭建过程的示例分析

2024-10-26 技术教程

小编给大家分享一下linux下mongodb集群搭建过程的示例分析，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

mongodb的集群结构如上图

网上有个mongo3.0的集群例子：

https://www.yisu.com/article/191388.htm

router提供入口,mongo客户端通过router连入集群(本例只配置一个route集群)

Config Servers辅助记录数据分片(一个集群)

Shard为数据分片集群(本例中配置两个,用于验证分片),

本例中，为每个集群(shard config)三个mongo实例

config与shard为同一个类型的进程mongod

route则为mongos进程

下载mongo二进制压缩包

https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-5.0.6.tgz

解压可以看到

用openssl生成一个key,用于mongo集群内部数据通迅

opensslrand-base64123>keyfile

mongod配置为件(config与shard通用)

mongo_node.conf:

storage:engine:wiredTigerdirectoryPerDB:truejournal:enabled:truesystemLog:destination:filelogAppend:trueoperationProfiling:slowOpThresholdMs:10000replication:oplogSizeMB:10240processManagement:fork:truesecurity:authorization:"disabled"

mongos的配置文件(即图中的route)

mongos.conf:

systemLog:destination:filelogAppend:trueprocessManagement:fork:true

启动config集群(3个mongod进程)

WORK_DIR=/home/???/go/mongodb/mongo_testKEYFILE=$WORK_DIR/key/keyfilecat$KEYFILECONFFILE=$WORK_DIR/conf/mongo_node.confcat$CONFFILEMONGOD=mongodecho$MONGOD$MONGOD--port26001--bind_ip_all--configsvr--replSetconfigReplSet--keyFile$KEYFILE--dbpath$WORK_DIR/config_cluster/conf_n1/data--pidfilepath$WORK_DIR/config_cluster/conf_n1/db.pid--logpath$WORK_DIR/config_cluster/conf_n1/db.log--config$CONFFILE$MONGOD--port26002--bind_ip_all--configsvr--replSetconfigReplSet--keyFile$KEYFILE--dbpath$WORK_DIR/config_cluster/conf_n2/data--pidfilepath$WORK_DIR/config_cluster/conf_n2/db.pid--logpath$WORK_DIR/config_cluster/conf_n2/db.log--config$CONFFILE$MONGOD--port26003--bind_ip_all--configsvr--replSetconfigReplSet--keyFile$KEYFILE--dbpath$WORK_DIR/config_cluster/conf_n3/data--pidfilepath$WORK_DIR/config_cluster/conf_n3/db.pid--logpath$WORK_DIR/config_cluster/conf_n3/db.log--config$CONFFILE

启动成功后

用命令mongo--port26001--host127.0.0.1

如下图,进入mongo的shell

在shell中输入如下js代码设置config集群

cfg={_id:"configReplSet",configsvr:true,members:[{_id:0,host:'127.0.0.1:26001'},{_id:1,host:'127.0.0.1:26002'},{_id:2,host:'127.0.0.1:26003'}]};rs.initiate(cfg);

三个config mongo进程会自动选出一个primary,过一会再进入shell就会发现shell提示变成primary

顺便给config添加一个admin用户,(一个集群只要在primary进程添加一次,会自动同步给secondary)

useadmindb.createUser({user:'admin',pwd:'123456',roles:[{role:'clusterAdmin',db:'admin'},{role:'userAdminAnyDatabase',db:'admin'},{role:'dbAdminAnyDatabase',db:'admin'},{role:'readWriteAnyDatabase',db:'admin'}]})

同样之后shard也做同样的添加用户操作,便于后继观察数据

启动shard

WORK_DIR=/home/???/go/mongodb/mongo_testKEYFILE=$WORK_DIR/key/keyfilecat$KEYFILECONFFILE=$WORK_DIR/conf/mongo_node.confcat$CONFFILEMONGOD=mongodecho$MONGODecho"startshard1replicaset"$MONGOD--port27001--bind_ip_all--shardsvr--replSetshard1--keyFile$KEYFILE--dbpath$WORK_DIR/shard1/sh2_n1/data--pidfilepath$WORK_DIR/shard1/sh2_n1/db.pid--logpath$WORK_DIR/shard1/sh2_n1/db.log--config$CONFFILE$MONGOD--port27002--bind_ip_all--shardsvr--replSetshard1--keyFile$KEYFILE--dbpath$WORK_DIR/shard1/sh2_n2/data--pidfilepath$WORK_DIR/shard1/sh2_n2/db.pid--logpath$WORK_DIR/shard1/sh2_n2/db.log--config$CONFFILE$MONGOD--port27003--bind_ip_all--shardsvr--replSetshard1--keyFile$KEYFILE--dbpath$WORK_DIR/shard1/sh2_n3/data--pidfilepath$WORK_DIR/shard1/sh2_n3/db.pid--logpath$WORK_DIR/shard1/sh2_n3/db.log--config$CONFFILE

用mongo--port27001--host127.0.0.1进入mongo shell

cfg={_id:"shard1",members:[{_id:0,host:'127.0.0.1:27001'},{_id:1,host:'127.0.0.1:27002'},{_id:2,host:'127.0.0.1:27003'}]};rs.initiate(cfg);

同样用之前的添加用户的js

并用同样的方法启动shard2集群,用于实验数据分片

对应的目录与分片名改成shard2

启动route

WORK_DIR=/home/???/go/mongodb/mongo_testKEYFILE=$WORK_DIR/key/keyfilecat$KEYFILECONFFILE=$WORK_DIR/conf/mongos.confcat$CONFFILEMONGOS=mongosecho$MONGOSecho"startmongosrouteinstances"$MONGOS--port=25001--bind_ip_all--configdbconfigReplSet/127.0.0.1:26001,127.0.0.1:26002,127.0.0.1:26003--keyFile$KEYFILE--pidfilepath$WORK_DIR/route/r_n1/db.pid--logpath$WORK_DIR/route/r_n1/db.log--config$CONFFILE$MONGOS--port25002--bind_ip_all--configdbconfigReplSet/127.0.0.1:26001,127.0.0.1:26002,127.0.0.1:26003--keyFile$KEYFILE--pidfilepath$WORK_DIR/route/r_n2/db.pid--logpath$WORK_DIR/route/r_n2/db.log--config$CONFFILE$MONGOS--port25003--bind_ip_all--configdbconfigReplSet/127.0.0.1:26001,127.0.0.1:26002,127.0.0.1:26003--keyFile$KEYFILE--pidfilepath$WORK_DIR/route/r_n3/db.pid--logpath$WORK_DIR/route/r_n3/db.log--config$CONFFILE

路由添加分片

用mongo--port25001--host127.0.0.1-uadmin-p123456进入shell

或者这样也可 mongomongodb://admin:123456@127.0.0.1:25001

在mongo shell分别执行以下两行js

sh.addShard("shard1/127.0.0.1:27001")sh.addShard("shard2/127.0.0.1:27011")

创建一个mongo database与collection

并设置分片

usetestsh.enableSharding("test")db.createCollection("test_shard")sh.shardCollection("test.test_shard",{_id:"hashed"},false,{numInitialChunks:4})

在mongo shell用以下js添加数据，可以修改循环次数避免测试时间过长

varcnt=0;for(vari=0;i<1000;i++){vardl=[];for(varj=0;j<100;j++){dl.push({"bookId":"BBK-"+i+"-"+j,"type":"Revision","version":"IricSoneVB0001","title":"Jackson'sLife","subCount":10,"location":"ChinaCNShenzhenFutianDistrict","author":{"name":50,"email":"RichardFoo@yahoo.com","gender":"female"},"createTime":newDate()});}cnt+=dl.length;db.test_shard.insertMany(dl);print("insert",cnt);}

在windows下安装mongodb，利用自带的compass客户端观察两个shard集群

会发现数据分流到两个集群了

也可以直接连route观察数据

补充：

把js存到文件里给shell执行会比较方便

执行js命令如下:

mongomongodb://admin:123456@127.0.0.1:25001./test.js

示例js代码:

print('=========WECOME==========');conn=newMongo("mongodb://admin:123456@192.168.2.129:25001");db=conn.getDB("testjs")sh.enableSharding("testjs")db.createCollection("testjs_col")sh.shardCollection("testjs.testjs_col",{_id:"hashed"},false,{numInitialChunks:4})vardl=[];for(varj=0;j<10;j++){dl.push({"bookId":"BBK-"+0+"-"+j,"type":"Revision","version":"IricSoneVB0001","title":"Jackson'sLife","subCount":10,"location":"ChinaCNShenzhenFutianDistrict","author":{"name":50,"email":"RichardFoo@yahoo.com","gender":"female"},"createTime":newDate()});}db.testjs_col.insertMany(dl);cursor=db.testjs_col.find();printjson(cursor.toArray());

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