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如何配置MongoDB分片群集

程序员文章站 2022-09-03 20:59:59
配置MongoDB分片群集实验环境:分片服务器1(一主两从)Kgcs1 27017、27018、27019 配置文件(mongod-2.conf)分片服务器2(一主两从)Kgcs2 27020、27021、27022 配置文件(mongod2-5.conf)配置服务器(一主两从)config server 37017、37018、37019 配置文件(mongod6-8.conf)路由服务器:Mongos :47017 配置文件(mongods.conf)一、配置分片服务...

配置MongoDB分片群集

实验环境:
分片服务器1(一主两从)
Kgcs1 27017、27018、27019 配置文件(mongod-2.conf)
分片服务器2(一主两从)
Kgcs2 27020、27021、27022 配置文件(mongod2-5.conf)
配置服务器(一主两从)
config server 37017、37018、37019 配置文件(mongod6-8.conf)
路由服务器:
Mongos :47017 配置文件(mongods.conf)

一、配置分片服务器(注意配置前要把所有实例中的数据清空:)在配置文件中添加一下内容:每个复制集的每一个节点都需要配置:

1[root@kgc6 ~]# vim /etc/mongod.conf 
sharding:
  clusterRole: shardsvr
replication:
  oplogSizeMB: 2048
  replSetName: kgcrs1(这里是复制集的名称和上面规划的要一样)


2)登录MongoDB数据库添加复制集并初始化:
[root@kgc6 bin]# mongo
> config={_id:"kgcrs1",members:[{_id:0,host:"127.0.0.1:27017"},{_id:1,host:"127.0.0.1:27018"},{_id:2,host:"127.0.0.1:27019"}]} 
> rs.initiate(config)
{ "ok" : 1 }


[root@kgc6 bin]# mongo --port 27020
>  config={_id:"kgcrs2",members:[{_id:0,host:"127.0.0.1:27020"},{_id:1,host:"127.0.0.1:27021"},{_id:2,host:"127.0.0.1:27022"}]} 
> rs.initiate(config)
{ "ok" : 1 }
可以使用rs.status()命令查看复制集

二、配置配置服务器:(注意三台配置服务器都需要添加一下内容:)

[root@kgc6 ~]# vim /etc/mongod6.conf 
harding:
  clusterRole: configsvr
#replication:
replication:
  oplogSizeMB: 2048
  replSetName: configReplSet  (配置服务器复制集名称)

3)登录到37017 MongoDB数据库添加复制集并初始化:
[root@kgc6 bin]# mongo --port 37017
> config={_id:"configReplSet",members:[{_id:0,host:"127.0.0.1:37017"},{_id:1,host:"127.0.0.1:37018"},{_id:2,host:"127.0.0.1:37019"}]}
> rs.initiate(config)
{ "ok" : 1 }

三、配置路由服务器:

1):在路由服务器的配置文件中加上如下选项:
[root@kgc6 ~]# vim /etc/mongod9.conf 
sharding:
  configDB: configReplSet/127.0.0.1:37017,127.0.0.1:37018,127.0.0.1:37019

2)启动路由服务器mongos:
[root@kgc6 bin]# mongos -f /etc/mongods.conf
[root@kgc6 bin]# whatis mongos
mongos (1)           - MongoDB Sharded Cluster Query Router
[root@kgc6 bin]# whatis mongo
mongo (1)            - MongoDB Shell
[root@kgc6 bin]# whatis mongod
mongod (1)           - MongoDB Server

3)登录到路由服务器 47017 MongoDB数据库为分片群集添加节点:
[root@kgc6 bin]# mongo --port 47017
mongos> use admin
switched to db admin
mongos> mongos> db.runCommand({addshard:"kgcrs1/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019",name:"shard1"})
{ "shardAdded" : "shard1", "ok" : 1 }
mongos> db.runCommand({addshard:"kgcrs2/127.0.0.1:27020,127.0.0.1:27021,127.0.0.1:27022",name:"shard2"})
{ "shardAdded" : "shard2", "ok" : 1 }
mongos> db.runCommand({listshards:1})
{
	"shards" : [
		{
			"_id" : "shard2",
			"host" : "kgcrs2/127.0.0.1:27020,127.0.0.1:27021,127.0.0.1:27022",
			"state" : 1
		},
		{
			"_id" : "shard1",
			"host" : "kgcrs1/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019",
			"state" : 1
		}
	],
	"ok" : 1
}

mongos> sh.status()
--- Sharding Status --- 
  sharding version: {
  	"_id" : 1,
  	"minCompatibleVersion" : 5,
  	"currentVersion" : 6,
  	"clusterId" : ObjectId("5f06ee39003f00de0f0f9440")
  }
  shards:
        {  "_id" : "shard1",  "host" : "kgcrs1/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019",  "state" : 1 }
        {  "_id" : "shard2",  "host" : "kgcrs2/127.0.0.1:27020,127.0.0.1:27021,127.0.0.1:27022",  "state" : 1 }
  active mongoses:
        "3.4.24" : 1
  autosplit:
        Currently enabled: yes
  balancer:
        Currently enabled:  yes
        Currently running:  no
NaN
        Failed balancer rounds in last 5 attempts:  0
        Migration Results for the last 24 hours: 
                No recent migrations
  databases:

4)激活分片功能:
mongos> db
admin
mongos> db.runCommand({enablesharding:"test"}) 激活test库的分片功能
{ "ok" : 1 }

5)指定分片键对集合分片:
第一步:创建索引 :优化查询的重要手段:
mongos> use test
switched to db test
mongos> db
test
mongos> db.stu.ensureIndex({id:1})
{
	"raw" : {
		"kgcrs1/127.0.0.1:27017,127.0.0.1:27018,127.0.0.1:27019" : {
			"createdCollectionAutomatically" : true,
			"numIndexesBefore" : 1,
			"numIndexesAfter" : 2,
			"ok" : 1,
			"$gleStats" : {
				"lastOpTime" : {
					"ts" : Timestamp(1594291026, 2),
					"t" : NumberLong(2)
				},
				"electionId" : ObjectId("7fffffff0000000000000002")
			}
		}
	},
	"ok" : 1
}

第二步:开启分片:
mongos> use admin
switched to db admin
mongos> db.runCommand({shardcollection:"test.stu",key:{id:1}})
{ "collectionsharded" : "test.stu", "ok" : 1 }
mongos> use config  //设置块的大小
switched to db config
mongos> db.settings.save( { _id:"chunksize", value:"8" } )8M
WriteResult({ "nMatched" : 0, "nUpserted" : 1, "nModified" : 0, "_id" : "chunksize" })

四、集合分片验证:
第一步:产生大量数据

mongos> use test;
switched to db test
mongos> for(var i=1;i<=100000;i++){db.stu.insert({'id':i,'name':'Alice'});} 
//添加10万条数据

本文地址:https://blog.csdn.net/weixin_45947267/article/details/107314680