MongoDB分片集群部署详解
时间：2021-01-19 12:05:20|栏目：mongodb|点击： 次
一、环境说明
1、我们prod环境MongoDB的集群架构是做的分片集群的部署，但是目前我们没有分片，即所有数据都在一个分片上，后期如果数量大，需要分配，集群随时可以分片，对业务方透明
2、各个角色的部署情况
| 角色 | IP | 端口 | 复制集名称 |
|---|---|---|---|
| mongos | 172.21.244.101，172.21.244.102，172.21.244.94 | 27000 | 无 |
| config server | 172.21.244.101，172.21.244.102，172.21.244.94 | 27100 | repl_configsvr |
| 存储节点（shard） | 172.21.244.101，172.21.244.102，172.21.244.94 | 27101 | shard1 |
3、MongoDB版本
mongos> db.version() 4.0.4-62-g7e345a7
二、基础信息准备
0、系统优化
echo "never" >/sys/kernel/mm/transparent_hugepage/enabled echo "never" >/sys/kernel/mm/transparent_hugepage/defrag
1、下载MongoDB二进制文件
cd /chj/app wget ops.chehejia.com:9090/pkg/chj_mongodb_4.0.4.tar.gz tar -zxvf chj_mongodb_4.0.4.tar.gz
2、相关目录建立
#建立base目录 mkdir /chj/data/mongodb/chj_db #把MongoDB二进制文件移动到base目录下的bin文件夹 mv chj_mongodb_4.0.4/bin /chj/data/mongodb/chj_db/bin #建立认证文件目录 mkdir /chj/data/mongodb/chj_db/auth #建立配置文件目录 mkdir /chj/data/mongodb/chj_db/conf #建立config server的data和日志目录 mkdir /chj/data/mongodb/chj_db/config/data -p mkdir /chj/data/mongodb/chj_db/config/log #建立mongos的日志目录 mkdir /chj/data/mongodb/chj_db/mongos/log -p #建立数据节点data和日志目录 mkdir /chj/data/mongodb/chj_db/shard1/data -p mkdir /chj/data/mongodb/chj_db/shard1/log
3、相关配置文件编写
A、mongos的配置文件编写
vim /chj/data/mongodb/chj_db/conf/mongos.conf systemLog: destination: file logAppend: true path: /chj/data/mongodb/chj_db/mongos/log/mongos.log processManagement: fork: true # fork and run in background pidFilePath: /chj/data/mongodb/chj_db/mongos/log/mongos.pid # location of pidfile timeZoneInfo: /usr/share/zoneinfo net: port: 27000 bindIpAll: true maxIncomingConnections: 1000 unixDomainSocket: enabled: true pathPrefix: /chj/data/mongodb/chj_db/mongos/log filePermissions: 0700 security: keyFile: /chj/data/mongodb/chj_db/auth/keyfile.key # authorization: enabled #replication: sharding: configDB: repl_configsvr/172.21.244.101:27100,172.21.244.102:27100,172.21.244.94:27100
B、config server的配置文件编写
vim /chj/data/mongodb/chj_db/conf/config.conf systemLog: destination: file logAppend: true path: /chj/data/mongodb/chj_db/config/log/congigsrv.log storage: dbPath: /chj/data/mongodb/chj_db/config/data journal: enabled: true wiredTiger: engineConfig: directoryForIndexes: true processManagement: fork: true # fork and run in background pidFilePath: /chj/data/mongodb/chj_db/config/log/configsrv.pid # location of pidfile timeZoneInfo: /usr/share/zoneinfo net: port: 27100 bindIp: 0.0.0.0 # Enter 0.0.0.0,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting. #bindIpAll: true maxIncomingConnections: 1000 unixDomainSocket: enabled: true pathPrefix: /chj/data/mongodb/chj_db/config/data filePermissions: 0700 security: keyFile: /chj/data/mongodb/chj_db/auth/keyfile.key authorization: enabled replication: replSetName: repl_configsvr sharding: clusterRole: configsvr
C、存储节点的配置文件编写
vim /chj/data/mongodb/chj_db/conf/shard1.conf systemLog: destination: file logAppend: true path: /chj/data/mongodb/chj_db/shard1/log/shard1.log storage: dbPath: /chj/data/mongodb/chj_db/shard1/data journal: enabled: true wiredTiger: engineConfig: directoryForIndexes: true processManagement: fork: true # fork and run in background pidFilePath: /chj/data/mongodb/chj_db/shard1/log/shard1.pid # location of pidfile timeZoneInfo: /usr/share/zoneinfo net: port: 27101 bindIp: 0.0.0.0 # Enter 0.0.0.0,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting. #bindIpAll: true maxIncomingConnections: 1000 unixDomainSocket: enabled: true pathPrefix: /chj/data/mongodb/chj_db/shard1/data filePermissions: 0700 security: keyFile: /chj/data/mongodb/chj_db/auth/keyfile.key authorization: enabled replication: replSetName: shard1 sharding: clusterRole: shardsvr
4、生产key认证文件
echo "chj123456" >/chj/data/mongodb/chj_db/auth/keyfile.key #设置文件的权限为400，不然服务无法启动 chmod 400 /chj/data/mongodb/chj_db/auth/keyfile.key
三、集群初始化
1、启动 config server 服务
/chj/data/mongodb/chj_db/bin/mongod -f /chj/data/mongodb/chj_db/conf/config.conf
2、初始化config server集群
#登录其中一个config server节点
/chj/data/mongodb/chj_db/bin/mongo --port 27100
#配置集群
config = { _id:"repl_configsvr",members:[ {_id:0,host:"172.21.244.101:27100"}, {_id:1,host:"172.21.244.102:27100"}, {_id:2,host:"172.21.244.94:27100"}] }
#初始化集群
rs.initiate(config)
PS：
结果输出如下，说明集群初始化成功，可以通过rs.status()命令查看集群状态
{
"ok" : 1,
"$gleStats" : {
"lastOpTime" : Timestamp(1557538260, 1),
"electionId" : ObjectId("000000000000000000000000")
},
"lastCommittedOpTime" : Timestamp(0, 0)
}
3、启动存储节点服务
/chj/data/mongodb/chj_db/bin/mongod -f /chj/data/mongodb/chj_db/conf/shard1.conf
4、初始化存储集群
#登录你希望是主节点的服务器
/chj/data/mongodb/chj_db/bin/mongo --port 27101
#配置集群
config = { _id:"shard1",members:[ {_id:0,host:"172.21.244.101:27101"}, {_id:1,host:"172.21.244.102:27101"},{_id:2,host:"172.21.244.94:27101",arbiterOnly:true}] }
#初始化集群
rs.initiate(config)
PS：
结果输出如下，说明集群初始化成功，可以通过rs.status()命令查看集群状态
{ "ok" : 1 }
5、添加存储集群的管理账号
登录主节点
/chj/data/mongodb/chj_db/bin/mongo --port 27101
use admin
db.createUser(
{
user: "root",
pwd: "123456",
roles: [ { role: "root", db: "admin" } ]
}
)
6、启动mongos 服务
/chj/data/mongodb/chj_db/bin/mongos -f /chj/data/mongodb/chj_db/conf/mongos.conf
7、添加config server的管理账号
登录任意一个mongos节点
/chj/data/mongodb/chj_db/bin/mongo --port 27000
use admin
db.createUser(
{
user: "root",
pwd: "123456",
roles: [ { role: "root", db: "admin" } ]
}
)
8、把存储节点添加到mongos
登录任意一个mongos节点（如果是在上一步的窗口，需要退出重新登录）
/chj/data/mongodb/chj_db/bin/mongo --port 27000
use admin
db.auth('root','123456')
#添加分片
sh.addShard('shard1/172.21.244.101:27101,172.21.244.102:27101,172.21.244.94:27101')
#查看分片状态
sh.status()
四、交付业务方
1、建立应用账号
登录任意一个mongos节点
/chj/data/mongodb/chj_db/bin/mongo --port 27000
use admin
db.auth('root','123456')
#切到业务数据库
use chj_db
#建立读写账号
db.createUser(
{
user: "chj_db_rw",
pwd: "123456",
roles: [
{ role: "readWrite", db: "chj_db" },
{ role: "dbOwner", db: "chj_db" }
]
}
)
#建立只读账号(根据业务需求确认是否需要)
db.createUser(
{
user: "chj_db_r",
pwd: "123456",
roles: [ { role: "read", db: "chj_db" } ]
}
)
2、交付开发人员信息
连接地址：172.21.244.101:27000，172.21.244.102:27000，172.21.244.94:27000 库名：chj_db 账号：chj_db_rw 密码：123456
五、数据库启用分片
如果后期业务量大，需要开启分片，配置如下
#指定需要分片的数据库
mongos> sh.enableSharding("chj_db")
{
"ok" : 1,
"operationTime" : Timestamp(1557546835, 3),
"$clusterTime" : {
"clusterTime" : Timestamp(1557546835, 3),
"signature" : {
"hash" : BinData(0,"bkrrr8Kxrr9j9udrDc/hURHld38="),
"keyId" : NumberLong("6689575940508352541")
}
}
}
#在chj_db数据库和users集合中创建了name和age为升序的片键
mongos> sh.shardCollection("chj_db.users",{name:1,age:1})
{
"collectionsharded" : "chj_db.users",
"collectionUUID" : UUID("59c0b99f-efff-4132-b489-f6c7e3d98f42"),
"ok" : 1,
"operationTime" : Timestamp(1557546861, 12),
"$clusterTime" : {
"clusterTime" : Timestamp(1557546861, 12),
"signature" : {
"hash" : BinData(0,"UBB1A/YODnmXwG5eAhgNLcKVzug="),
"keyId" : NumberLong("6689575940508352541")
}
}
}
#查看分片情况
mongos> sh.status()
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("5cd625e0da695346d740f749")
}
shards:
{ "_id" : "shard1", "host" : "shard1/172.21.244.101:27101,172.21.244.102:27101", "state" : 1 }
active mongoses:
"4.0.4-62-g7e345a7" : 3
autosplit:
Currently enabled: yes
balancer:
Currently enabled: yes
Currently running: no
Failed balancer rounds in last 5 attempts: 0
Migration Results for the last 24 hours:
No recent migrations
databases:
{ "_id" : "chj_db", "primary" : "shard1", "partitioned" : true, "version" : { "uuid" : UUID("82088bc7-7b98-4033-843d-7058d8d959f6"), "lastMod" : 1 } }
chj_db.users
shard key: { "name" : 1, "age" : 1 }
unique: false
balancing: true
chunks:
shard1 1
{ "name" : { "$minKey" : 1 }, "age" : { "$minKey" : 1 } } -->> { "name" : { "$maxKey" : 1 }, "age" : { "$maxKey" : 1 } } on : shard1 Timestamp(1, 0)
{ "_id" : "config", "primary" : "config", "partitioned" : true }
config.system.sessions
shard key: { "_id" : 1 }
unique: false
balancing: true
chunks:
shard1 1
{ "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : shard1 Timestamp(1, 0)
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栏 目：mongodb
本文标题：MongoDB分片集群部署详解
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