MongoDB 3.4中怎么配置sharding分片

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1. 創(chuàng)建配置服務(wù)副本集
創(chuàng)建數(shù)據(jù)目錄，config目錄供配置服務(wù)使用，shard目錄供分片數(shù)據(jù)節(jié)點使用
[root@MySQL01 ~]# su - mongo
[mongo@MySQL01 ~]$ cd /data/db
[mongo@MySQL01 db]$ mkdir config01
[mongo@MySQL01 db]$ mkdir config02
[mongo@MySQL01 db]$ mkdir config03
[mongo@MySQL01 db]$ mkdir shard01
[mongo@MySQL01 db]$ mkdir shard02
[mongo@MySQL01 db]$ mkdir shard03

啟動配置服務(wù)副本集的每個節(jié)點
[mongo@MySQL01 ~]$ mongod --configsvr --replSet fire --dbpath /data/db/config01 --port 10001


[mongo@MySQL01 ~]$ mongod --configsvr --replSet fire --dbpath /data/db/config02 --port 10002


[mongo@MySQL01 ~]$ mongod --configsvr --replSet fire --dbpath /data/db/config03 --port 10003

連接到配置服務(wù)器，執(zhí)行初始化操作
[mongo@MySQL01 ~]$ mongo localhost:10001
MongoDB shell version v3.4.10
connecting to: localhost:10001
MongoDB server version: 3.4.10

> rs.initiate(
...   {
...     _id: "fire",
...     configsvr: true,
...     members: [
...       { _id : 0, host : "MySQL01:10001" },
...       { _id : 1, host : "MySQL01:10002" },
...       { _id : 2, host : "MySQL01:10003" }
...     ]
...   }
... )
{ "ok" : 1 }
fire:SECONDARY> exit
bye

2. 創(chuàng)建分片副本集
啟動副本集的每個節(jié)點
[mongo@MySQL01 ~]$ mongod --shardsvr --replSet flame --port 20001 --dbpath /data/db/shard01


[mongo@MySQL01 ~]$ mongod --shardsvr --replSet flame --port 20002 --dbpath /data/db/shard02


[mongo@MySQL01 ~]$ mongod --shardsvr --replSet flame --port 20003 --dbpath /data/db/shard03

連接到分片副本集的一個節(jié)點，執(zhí)行副本集初始化操作
[mongo@MySQL01 ~]$ mongo localhost:20001
MongoDB shell version v3.4.10
connecting to: localhost:20001
MongoDB server version: 3.4.10
> rs.initiate(
...   {
...     _id : "flame",
...     members: [
...       { _id : 0, host : "MySQL01:20001" },
...       { _id : 1, host : "MySQL01:20002" },
...       { _id : 2, host : "MySQL01:20003" }
...     ]
...   }
... )
{ "ok" : 1 }
flame:OTHER> exit
bye

3. 通過 mongos 連接到分片集群
[mongo@MySQL01 ~]$ mongos --configdb fire/MySQL01:10001,MySQL01:10002,MySQL01:10003 --port 30000

4. 增加分片到集群
連接到 mongos，增加上面創(chuàng)建的副本集到集群中
[mongo@MySQL01 ~]$ mongo localhost:30000
MongoDB shell version v3.4.10
connecting to: localhost:30000
MongoDB server version: 3.4.10

mongos> sh.addShard( "flame/MySQL01:40001")
{ "shardAdded" : "flame", "ok" : 1 }

開啟指定數(shù)據(jù)庫的分片

為sale數(shù)據(jù)庫開啟分片功能
mongos> sh.enableSharding("sale")
{ "ok" : 1 }

在sale數(shù)據(jù)庫里面創(chuàng)建一個集合
mongos> use sale
switched to db sale
mongos> 
mongos> show collections
mongos> db.dept.insert({"id":10})
WriteResult({ "nInserted" : 1 })
mongos> db.dept.insert({"id":20})
WriteResult({ "nInserted" : 1 })
mongos> db.dept.insert({"id":30})
WriteResult({ "nInserted" : 1 })

為創(chuàng)建好的集合執(zhí)行范圍分片
mongos> sh.shardCollection("sale.dept", { id : 1 } )
{
"proposedKey" : {
"id" : 1
},
"curIndexes" : [
{
"v" : 2,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "sale.dept"
}
],
"ok" : 0,
"errmsg" : "please create an index that starts with the shard key before sharding."
}

發(fā)生報錯，需要對集合的分片字段創(chuàng)建索引
mongos> db.dept.ensureIndex({"id" : 1})
{
"raw" : {
"flame/MySQL01:20001,MySQL01:20002,MySQL01:20003" : {
"createdCollectionAutomatically" : false,
"numIndexesBefore" : 1,
"numIndexesAfter" : 2,
"ok" : 1,
"$gleStats" : {
"lastOpTime" : {
"ts" : Timestamp(1512224813, 1),
"t" : NumberLong(1)
},
"electionId" : ObjectId("7fffffff0000000000000001")
}
}
},
"ok" : 1
}

對集合執(zhí)行分片
mongos> sh.shardCollection("sale.dept", { id : 1 } )
{ "collectionsharded" : "sale.dept", "ok" : 1 }

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