高可用mongodb集羣的學習記錄(四mongodb分片集羣搭建)
無論oracle還是mysql數據庫都有分區的概念，即同一張表物理上不在同一臺機器上，有效緩解了表都集中存在一臺機器的壓力。當然，mongodb也有類似的機制，即是分片。具體理論知識大家可以參考網上文檔，我這裏只記錄下具體操作步驟
參考網絡上一個圖。我選用的是2個副本集+1個仲裁。實際上我這裏分片集羣需要3個mongos，3個config server，數據分片3個shard server，對應着還有3個副本，3個仲裁節點，總共需要15個實例。因爲我資源確實緊張，又不想影響實驗效果。冥思苦想了一陣，索性在一臺機器上實現得了，分給不同的實例以不同的端口就好了。
閒話少說，開始搞起！！！
1. 資源劃分（感覺這是最糾結的一步）
2. mongdb的安裝
這個可以參考博主的前一篇章進行安裝高可用mongodb集羣的學習記錄(一安裝配置MongoDB)
3.創建所需要的目錄
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#創建所需要的目錄
[[email protected] mongodb]
# mkdir -p mongos{1..3}/log
[[email protected] mongodb]
# mkdir -p config{1..3}/log
[[email protected] mongodb]
# mkdir -p config{1..3}/data
[[email protected] mongodb]
# mkdir -p shard{1..3}_{1..3}/log
[[email protected] mongodb]
# mkdir -p shard{1..3}_{1..3}/data
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4. 啓動每一個配置服務器
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#啓動配置服務器
mongod --configsvr --dbpath config1
/data
--port 21001 --logpath config1
/log/config
.log --fork
mongod --configsvr --dbpath config2
/data
--port 21002 --logpath config2
/log/config
.log --fork
mongod --configsvr --dbpath config3
/data
--port 21003 --logpath config3
/log/config
.log --fork
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5.啓動mongos服務器
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mongos --configdb 192.168.221.160:21001,192.168.221.160:21002,192.168.221.160:21003 --port 20001 --logpath mongos1
/log/mongos
.log --fork
mongos --configdb 192.168.221.160:21001,192.168.221.160:21002,192.168.221.160:21003 --port 20002 --logpath mongos2
/log/mongos
.log --fork
mongos --configdb 192.168.221.160:21001,192.168.221.160:21002,192.168.221.160:21003 --port 20003 --logpath mongos3
/log/mongos
.log --fork
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6.啓動分片的副本集
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mongod --shardsvr --replSet shard1 --port 21101 --dbpath shard1_1
/data
--logpath shard1_1
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard1 --port 21201 --dbpath shard1_2
/data
--logpath shard1_2
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard1 --port 21301 --dbpath shard1_3
/data
--logpath shard1_3
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard2 --port 21102 --dbpath shard2_1
/data
--logpath shard2_1
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard2 --port 21202 --dbpath shard2_2
/data
--logpath shard2_2
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard2 --port 21302 --dbpath shard2_3
/data
--logpath shard2_3
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard3 --port 21103 --dbpath shard3_1
/data
--logpath shard3_1
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard3 --port 21203 --dbpath shard3_2
/data
--logpath shard3_2
/log/shard
.log --fork --nojournal --oplogSize 10
mongod --shardsvr --replSet shard3 --port 21303 --dbpath shard3_3
/data
--logpath shard3_3
/log/shard
.log --fork --nojournal --oplogSize 10
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7.分別對每個分片配置副本集,任意登錄一個節點
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#設置第一個分片副本集
[[email protected] ~]
# mongo 192.168.221.160:21101
MongoDB shell version: 3.0.6
connecting to: 192.168.221.160:21101
/test
> use admin
switched to db admin
#定義副本集配置信息
> config = {_id:
"shard1"
,members:[{_id:0,host:
"192.168.221.160:21101"
},{_id:1,host:
"192.168.221.160:21201"
},{_id:2,host:
"192.168.221.160:21301"
,arbiterOnly:
true
}]}
{
"_id"
:
"shard1"
,
"members"
: [
{
"_id"
: 0,
"host"
:
"192.168.221.160:21101"
},
{
"_id"
: 1,
"host"
:
"192.168.221.160:21201"
},
{
"_id"
: 2,
"host"
:
"192.168.221.160:21301"
,
"arbiterOnly"
:
true
}
]
}
#初始化副本集信息
> rs.initiate(config)
{
"ok"
: 1 }
shard1:OTHER>
#設置第二個分片副本集
[[email protected] ~]
# mongo 192.168.221.160:21102
MongoDB shell version: 3.0.6
connecting to: 192.168.221.160:21102
/test
> use admin
switched to db admin
> config = {_id:
"shard2"
,members:[{_id:0,host:
"192.168.221.160:21102"
},{_id:1,host:
"192.168.221.160:21202"
},{_id:2,host:
"192.168.221.160:21302"
,arbiterOnly:
true
}]}
{
"_id"
:
"shard2"
,
"members"
: [
{
"_id"
: 0,
"host"
:
"192.168.221.160:21102"
},
{
"_id"
: 1,
"host"
:
"192.168.221.160:21202"
},
{
"_id"
: 2,
"host"
:
"192.168.221.160:21302"
,
"arbiterOnly"
:
true
}
]
}
> rs.initiate(config)
{
"ok"
: 1 }
shard2:OTHER>
#設置第三個分片副本集
[[email protected] ~]
# mongo 192.168.221.160:21103
MongoDB shell version: 3.0.6
connecting to: 192.168.221.160:21103
/test
> use admin
switched to db admin
> config = {_id:
"shard3"
,members:[{_id:0,host:
"192.168.221.160:21103"
},{_id:1,host:
"192.168.221.160:21203"
},{_id:2,host:
"192.168.221.160:21303"
,arbiterOnly:
true
}]}
{
"_id"
:
"shard3"
,
"members"
: [
{
"_id"
: 0,
"host"
:
"192.168.221.160:21103"
},
{
"_id"
: 1,
"host"
:
"192.168.221.160:21203"
},
{
"_id"
: 2,
"host"
:
"192.168.221.160:21303"
,
"arbiterOnly"
:
true
}
]
}
> rs.initiate(config)
{
"ok"
: 1 }
shard3:OTHER>
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8.登錄到每一個mongos，設置分片配置，讓分片生效
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#串聯路由服務器與分片副本集1
[[email protected] ~]
# mongo 192.168.221.160:20001
MongoDB shell version: 3.0.6
connecting to: 192.168.221.160:20001
/test
Server has startup warnings:
2017-11-15T13:51:20.732+0800 I CONTROL ** WARNING: You are running this process as the root user,
which
is not recommended.
2017-11-15T13:51:20.733+0800 I CONTROL
mongos> use admin
switched to db admin
mongos> db.runCommand({addshard:
"shard1/192.168.221.160:21101,192.168.221.160:21201,192.168.221.160:21301"
})
{
"shardAdded"
:
"shard1"
,
"ok"
: 1 }
mongos>
#串聯路由服務器與分片副本集2
[[email protected] ~]
# mongo 192.168.221.160:20002
MongoDB shell version: 3.0.6
connecting to: 192.168.221.160:20002
/test
Server has startup warnings:
2017-11-15T13:51:43.660+0800 I CONTROL ** WARNING: You are running this process as the root user,
which
is not recommended.
2017-11-15T13:51:43.661+0800 I CONTROL
mongos> use admin
switched to db admin
mongos> db.runCommand({addshard:
"shard2/192.168.221.160:21102,192.168.221.160:21202,192.168.221.160:21302"
})
{
"shardAdded"
:
"shard2"
,
"ok"
: 1 }
mongos>
#串聯路由服務器與分片副本集3
[[email protected] ~]
# mongo 192.168.221.160:20003
MongoDB shell version: 3.0.6
connecting to: 192.168.221.160:20003
/test
Server has startup warnings:
2017-11-15T13:51:59.589+0800 I CONTROL ** WARNING: You are running this process as the root user,
which
is not recommended.
2017-11-15T13:51:59.589+0800 I CONTROL
mongos> use admin
switched to db admin
mongos> db.runCommand({addshard:
"shard3/192.168.221.160:21103,192.168.221.160:21203,192.168.221.160:21303"
})
{
"shardAdded"
:
"shard3"
,
"ok"
: 1 }
mongos>
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9.查看分片服務器的配置信息：
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mongos> db.runCommand({listshards:1})
{
"shards"
: [
{
"_id"
:
"shard1"
,
"host"
:
"shard1/192.168.221.160:21101,192.168.221.160:21201"
},
{
"_id"
:
"shard2"
,
"host"
:
"shard2/192.168.221.160:21102,192.168.221.160:212'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace;font-size:1em;background:none;border:0px;line-height:1.1em;vertical-align:baseline;color:#0000FF;">"shard1/192.168.221.160:21101,192.168.221.160:21201"
},
{
"_id"
:
"shard2"
,
"host"
:
"shard2/192.168.221.160:21102,192.168.221.160:21202"
},
{
"_id"
:
"shard3"
,
"host"
:
"shard3/192.168.221.160:21103,192.168.221.160:21203"
}
],
"ok"
: 1
}
mongos>
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仲裁節點不儲存數據，沒有在這裏顯示出來
10.連接mongos上，指定數據庫、指定集合讓分片生效
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