centos7.9 部署mongodb-4.4.18 分片副本集羣

原創 ixinliang 2023-08-06 13:52

準備基本環境

服務器node1(10.0.3.1) 服務器node2(10.0.3.2) 服務器node3(10.0.3.3)
mongos 20000 mongos 20000 mongos 20000
config server 21000 config server 21000 config server 21000
shard server1 主節點27001 shard server1 副節點 27001 shard server1 仲裁27001
shard server2 仲裁27002 shard server2 主節點27002 shard server2 副節點27002
shard server3 副節點27003 shard server3 仲裁27003 shard server3 主節點27003

搭建步驟

三臺設備均操作

  • 3臺設備修改 hosts 文件
[mongod@mongodb-node-1 ~]$ cat /etc/hosts
10.0.3.1	mongodb-node-1
10.0.3.2	mongodb-node-2
10.0.3.3	mongodb-node-3
  • 3臺設備創建數據目錄和日誌目錄
[mongod@mongodb-node-1 ~]$ mkdir -p /export/mongodb-4.4.18/cluster/{config,mongos,shard1,shard2,shard3}/{data,logs}
  • 3臺設備安裝mongodb tar包所需依賴
[mongod@mongodb-node-1 ~]$ yum install -y libcurl openssl xz-libs
  • 3臺設備下載mongodb二進制包並解壓
[root@mongodb-node-1 ~]#  wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.4.18.tgz 
[root@mongodb-node-1 ~]# tar -xf mongodb-linux-x86_64-rhel70-4.4.18.tgz -C /export/
[root@mongodb-node-1 ~]# cd /export/
[root@mongodb-node-1 export]# mv mongodb-linux-x86_64-rhel70-4.4.18 mongodb-4.4.18
  • 3臺設備配置環境變量
[root@mongodb-node-1 export]# cat /etc/profile.d/mongodb.sh 
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/export/mongodb-4.4.18/bin

source /etc/profile.d/mongodb.sh
mongo --version
  • 3臺設備創建mongodb啓動用戶
[root@mongodb-node-1 ~]# useradd  -d /export/mongod mongod
[root@mongodb-node-1 ~]# chown mongod:mongod /export/mongodb-4.4.18/ -R

第一臺設備 10.0.3.1 操作

# 準備configServer配置文件
[mongod@mongodb-node-1 config]$ cd /export/mongodb-4.4.18/cluster/config
[mongod@mongodb-node-1 config]$ cat config.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/config/logs/config.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/config/data
  journal:
    enabled: true

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/config/configsrv.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 21000
  bindIp: 0.0.0.0

sharding:
  clusterRole: configsvr

replication:
  replSetName: config


# 準備 shard1分片配置文件
[mongod@mongodb-node-1 shard1]$ cd /export/mongodb-4.4.18/cluster/shard1
[mongod@mongodb-node-1 shard1]$ cat shard1.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard1/logs/shard1.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard1/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard1/shard1.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27001
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard1


# 準備 shard2分片配置文件
[mongod@mongodb-node-1 shard2]$ cd /export/mongodb-4.4.18/cluster/shard2
[mongod@mongodb-node-1 shard2]$ cat shard2.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard2/logs/shard2.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard2/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard2/shard2.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27002
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard2


# 準備shard3分片配置文件
[mongod@mongodb-node-1 shard3]$ cd /export/mongodb-4.4.18/cluster/shard3
[mongod@mongodb-node-1 shard3]$ cat shard3.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard3/logs/shard3.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard3/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard3/shard3.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27003
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard3

# 準備 mongos-router配置文件，注意mongos沒有storage部分配置
[mongod@mongodb-node-1 mongos]$ cd /export/mongodb-4.4.18/cluster/mongos
[mongod@mongodb-node-1 mongos]$ cat mongos.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/mongos/logs/mongos.log

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/mongos/mongos.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 20000
  bindIp: 0.0.0.0

sharding:
  configDB: config/10.0.3.1:21000,10.0.3.2:21000,10.0.3.3:21000
  • 第二臺設備 10.0.3.2 操作
# 準備configServer配置文件
[mongod@mongodb-node-2 config]$ cd /export/mongodb-4.4.18/cluster/config
[mongod@mongodb-node-2 config]$ cat config.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/config/logs/config.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/config/data
  journal:
    enabled: true

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/config/configsrv.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 21000
  bindIp: 0.0.0.0

sharding:
  clusterRole: configsvr

replication:
  replSetName: config

# 準備 shard1分片配置文件
[mongod@mongodb-node-2 shard1]$ cd /export/mongodb-4.4.18/cluster/shard1
[mongod@mongodb-node-2 shard1]$ cat shard1.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard1/logs/shard1.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard1/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard1/shard1.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27001
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard1

# 準備 shard2分片配置文件
[mongod@mongodb-node-2 shard2]$ cd /export/mongodb-4.4.18/cluster/shard2
[mongod@mongodb-node-2 shard2]$ cat shard2.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard2/logs/shard2.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard2/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard2/shard2.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27002
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard2

# 準備shard3分片配置文件
[mongod@mongodb-node-2 shard3]$ cd /export/mongodb-4.4.18/cluster/shard3
[mongod@mongodb-node-2 shard3]$ cat shard3.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard3/logs/shard3.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard3/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard3/shard3.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27003
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard3

# 準備 mongos-router配置文件，注意mongos沒有storage部分配置
[mongod@mongodb-node-2 mongos]$ cd /export/mongodb-4.4.18/cluster/mongos
[mongod@mongodb-node-2 mongos]$ cat mongos.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/mongos/logs/mongos.log

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/mongos/mongos.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 20000
  bindIp: 0.0.0.0

sharding:
  configDB: config/10.0.3.1:21000,10.0.3.2:21000,10.0.3.3:21000
  • 第三臺設備 10.0.3.3 操作
# 準備configServer配置文件
[mongod@mongodb-node-3 config]$ cd /export/mongodb-4.4.18/cluster/config
[mongod@mongodb-node-3 config]$ cat config.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/config/logs/config.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/config/data
  journal:
    enabled: true

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/config/configsrv.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 21000
  bindIp: 0.0.0.0

sharding:
  clusterRole: configsvr

replication:
  replSetName: config

# 準備 shard1分片配置文件
[mongod@mongodb-node-3 shard1]$ cd /export/mongodb-4.4.18/cluster/shard1
[mongod@mongodb-node-3 shard1]$ cat shard1.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard1/logs/shard1.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard1/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard1/shard1.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27001
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard1


# 準備 shard2分片配置文件
[mongod@mongodb-node-2 shard2]$ cd /export/mongodb-4.4.18/cluster/shard2
[mongod@mongodb-node-2 shard2]$ cat shard2.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard2/logs/shard2.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard2/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard2/shard2.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27002
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard2

# 準備shard3分片配置文件
[mongod@mongodb-node-2 shard3]$ cd /export/mongodb-4.4.18/cluster/shard3
[mongod@mongodb-node-2 shard3]$ cat shard3.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard3/logs/shard3.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard3/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard3/shard3.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27003
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard3

# 準備 mongos-router配置文件，注意mongos沒有storage部分配置
[mongod@mongodb-node-2 mongos]$ cd /export/mongodb-4.4.18/cluster/mongos
[mongod@mongodb-node-2 mongos]$ cat mongos.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/mongos/logs/mongos.log

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/mongos/mongos.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 20000
  bindIp: 0.0.0.0

sharding:
  configDB: config/10.0.3.1:21000,10.0.3.2:21000,10.0.3.3:21000

啓動服務並初始化

  • 啓動三臺服務器的config server和配置副本集
# 連接3個節點執行以下命令分別啓動configServer
[mongod@mongodb-node-1 mongos]$ mongod -f /export/mongodb-4.4.18/cluster/config/config.conf

# 連接到第一個節點mongodb-node-1
[mongod@mongodb-node-1 ~]$ mongo 10.0.3.1 --port 21000 
rs.initiate(
  {
    _id: "config",
    configsvr: true,
    members: [
      { _id : 0, host : "10.0.3.1:21000" },
      { _id : 1, host : "10.0.3.2:21000" },
      { _id : 2, host : "10.0.3.3:21000" }
    ]
  }
)

# 查看節點狀態
rs.status()
  • 三臺服務器啓動shard 分片並初始化shard分片
# 3個節點每個節點執行以下命令啓動3個shard分片副本集
[mongod@mongodb-node-1 ~]$ mongod -f /export/mongodb-4.4.18/cluster/shard1/shard1.conf
[mongod@mongodb-node-1 ~]$ mongod -f /export/mongodb-4.4.18/cluster/shard2/shard2.conf
[mongod@mongodb-node-1 ~]$ mongod -f /export/mongodb-4.4.18/cluster/shard3/shard3.conf 

# 連接到第一個shard分片並初始化
[mongod@mongodb-node-1 ~]$ mongo 10.0.3.1 --port 27001
config = { _id : "shard1",members : [{_id : 0, host : "10.0.3.1:27001" ,priority: 2 },{_id : 1, host : "10.0.3.2:27001" ,priority: 1 },{_id : 2, host : "10.0.3.3:27001",arbiterOnly: true}]}//(“priority”優先級，數字越大，優先等級越高；“arbiterOnly”衝裁節點；衝裁節點根據優先等級判斷哪個節點作爲主節點)
rs.initiate(config)


> rs.initiate(config)
{ "ok" : 1 }
shard1:SECONDARY> 

#查看節點狀態
rs.status()


# 連接到第二個shard分片並初始化
[mongod@mongodb-node-1 ~]$ mongo 10.0.3.1 --port 27002
config = { _id : "shard2",members : [{_id : 0, host : "10.0.3.1:27002" ,arbiterOnly: true },{_id : 1, host : "10.0.3.2:27002" ,priority: 2 },{_id : 2, host : "10.0.3.3:27002",priority: 1}]}
rs.initiate(config)

# 連接到第三個shard分片並初始化
[mongod@mongodb-node-1 ~]$ mongo 10.0.3.1 --port 27003
use admin
config = { _id : "shard3",members : [{_id : 0, host : "10.0.3.1:27003" ,priority: 1 },{_id : 1, host : "10.0.3.2:27003" ,arbiterOnly: true },{_id : 2, host : "10.0.3.3:27003",priority: 2}]}
rs.initiate(config)

# 查看各個分片副本集節點狀態
rs.status()
  • 三臺服務器 啓動並初始化mongos
# 3個節點啓動mongos-router，注意啓動時使用mongos命令而非mongod命令：
[mongod@mongodb-node-1 ~]$ mongos -f /export/mongodb-4.4.18/cluster/mongos/mongos.conf 

# 連接到第一個mongos節點mongodb01並初始化
[mongod@mongodb-node-1 ~]$ mongo 10.0.3.1:20000

# 執行以下操作將3個分片副本集添加到集羣：
sh.addShard("shard1/10.0.3.1:27001,10.0.3.2:27001,10.0.3.3:27001")
sh.addShard("shard2/10.0.3.1:27002,10.0.3.2:27002,10.0.3.3:27002")
sh.addShard("shard3/10.0.3.1:27003,10.0.3.2:27003,10.0.3.3:27003")

# 查看mongos狀態
sh.status()

開啓密碼認證

  • 登陸 mongo01 10.0.3.1 創建賬號密碼（提前創建好賬號密碼）
[mongod@mongodb-node-1 cluster]$ mongo   10.0.3.1:20000 
> use admin
##創建賬號/密碼##
db.createUser({ user: 'admin', pwd: '123456', roles: [ { role: "root", db: "admin" } ] });
  • 在 mongo01 10.0.3.1 上創建keyfile密鑰文件
[mongod@mongodb-node-1 cluster]$ cd /export/mongodb-4.4.18/cluster
[mongod@mongodb-node-1 cluster]$ openssl rand -base64 756 >keyFile.key 
[mongod@mongodb-node-1 cluster]$ chmod 400 keyFile.key 
[mongod@mongodb-node-1 cluster]$ scp keyFile.key 10.0.3.2:/export/mongodb-4.4.18/cluster
[mongod@mongodb-node-1 cluster]$ scp keyFile.key 10.0.3.3:/export/mongodb-4.4.18/cluster
  • 在 config、shard1、shard2、shard3、mongos添加認證配置
# 要先關閉所有 mongos 進程，修改配置文件，增加認證信息，然後再依次啓動進程

# config 配置文件
[mongod@mongodb-node-1 cluster]$ cat config/config.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/config/logs/config.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/config/data
  journal:
    enabled: true

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/config/configsrv.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 21000
  bindIp: 0.0.0.0

sharding:
  clusterRole: configsvr

replication:
  replSetName: config

security:
  keyFile: /export/mongodb-4.4.18/cluster/keyFile.key 
  authorization: enabled



# shard1配置文件
[mongod@mongodb-node-1 cluster]$ cat shard1/shard1.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard1/logs/shard1.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard1/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard1/shard1.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27001
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard1

security:
  keyFile: /export/mongodb-4.4.18/cluster/keyFile.key 
  authorization: enabled


# shard2配置文件
[mongod@mongodb-node-1 cluster]$ cat shard2/shard2.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard2/logs/shard2.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard2/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard2/shard2.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27002
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard2

security:
  keyFile: /export/mongodb-4.4.18/cluster/keyFile.key 
  authorization: enabled


# shard3配置文件
[mongod@mongodb-node-1 cluster]$ cat shard3/shard3.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/shard3/logs/shard3.log

# Where and how to store data.
storage:
  dbPath: /export/mongodb-4.4.18/cluster/shard3/data
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
      cacheSizeGB: 2
# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/shard3/shard3.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27003
  bindIp: 0.0.0.0

sharding:
    clusterRole: shardsvr
    
replication:
    replSetName: shard3

security:
  keyFile: /export/mongodb-4.4.18/cluster/keyFile.key 
  authorization: enabled


# mongos 配置文件，注意沒有 authorization: enabled
[mongod@mongodb-node-1 cluster]$ cat mongos/mongos.conf 
systemLog:
  destination: file
  logAppend: true
  path: /export/mongodb-4.4.18/cluster/mongos/logs/mongos.log

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /export/mongodb-4.4.18/cluster/mongos/mongos.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 20000
  bindIp: 0.0.0.0

sharding:
  configDB: config/10.0.3.1:21000,10.0.3.2:21000,10.0.3.3:21000


security:
  keyFile: /export/mongodb-4.4.18/cluster/keyFile.key
  • 依次3臺機器服務
mongod -f /export/mongodb-4.4.18/cluster/config/config.conf 
mongod -f /export/mongodb-4.4.18/cluster/shard1/shard1.conf 
mongod -f /export/mongodb-4.4.18/cluster/shard2/shard2.conf 
mongod -f /export/mongodb-4.4.18/cluster/shard3/shard3.conf 
mongos -f /export/mongodb-4.4.18/cluster/mongos/mongos.conf 

#  按照先後順序來處理關閉，mongos>config>shadr3>shadr2>shadr1

mongodb使用方法

# mongodb 使用方法：
1.查看數據分佈
use testdb;
show tables;
db.order.getShardDistribution()

2.創建片健
在 指定testdb分片生效
sh.enableSharding("testdb")

3.片鍵有兩種模式：hash模式，range模式
使用hash模式分片:  記錄在各片上的分佈比較平均
sh.shardCollection( "testdb.person", { "_id": "hashed" } )

使用range模式分片
mongos> sh.shardCollection( "testdb.person", { "name": 1 } )


要分片的庫原來有數據的情況下，先建index，然後再指定片鍵
mongos> sh.enableSharding("new2")
mongos> use new2
mongos> db.user2.createIndex( { "username": 1 } )
mongos> sh.shardCollection( "new2.user2", { "username": 1 } )

發片後，片健不可改變；一個集合只能有一個片健；片健必須有索引


4.分片的元數據
不要直接到config server上查看分片集羣的元數據信息，這些數據非常重要，安全的方式是通過mongos連接到config數據查看，或者使用sh輔助函數查看。
使用sh輔助函數查看
連接到mongos查看config數據庫中的集合 
mongos> use config
mongos> db.shards.find()
{ "_id" : "shard1", "host" : "shard1/10.0.3.1:27001,10.0.3.2:27001", "state" : 1 }
{ "_id" : "shard2", "host" : "shard2/10.0.3.2:27002,10.0.3.3:27002", "state" : 1 }
{ "_id" : "shard3", "host" : "shard3/10.0.3.1:27003,10.0.3.3:27003", "state" : 1 }

databases集合保存分片集羣中所有數據庫的信息，不管數據庫是否分片
mongos> db.databases.find()
{ "_id" : "testdb", "primary" : "shard1", "partitioned" : true, "version" : { "uuid" : UUID("b748ce93-b28d-43ad-a0fa-843813d9e9ff"), "lastMod" : 1 } }
{ "_id" : "test", "primary" : "shard1", "partitioned" : true, "version" : { "uuid" : UUID("c98e8734-92ad-4644-968d-d5aed0044e89"), "lastMod" : 1 } }

測試

#連接任意一臺mongos節點
mongo  -u admin --port 20000 
use admin

#爲數據庫啓用分片
爲testdb數據庫啓用分片
sh.enableSharding("testdb")

#爲集合啓用分片
爲order集合設置分片規則
sh.shardCollection("testdb.order", {"_id": "hashed" })

#插入100000條數據進行驗證
use testdb
for (i = 1; i <= 100000; i=i+1){
    db.order.insert({'price': 1})
}

#查看插入的數據量
db.order.find().count()

#查看分片情況
db.order.stats();
"ns" : "testdb.order",
        "count" : 99999,
        "size" : 8388810,
        "storageSize" : 4153344,
        "totalIndexSize" : 9805824,
        "totalSize" : 13959168,
        "indexSizes" : {
                "_id_" : 4915200,
                "_id_hashed" : 4890624
        },
        "avgObjSize" : 83,
        "maxSize" : NumberLong(0),
        "nindexes" : 2,
        "scaleFactor" : 1,
        "nchunks" : 6,
        "shards" : {
                "shard1" : {
                        "ns" : "testdb.order",
                        "size" : 2757979,
                        "count" : 32877,
                        "avgObjSize" : 83,
                        "storageSize" : 1368064,
                        "freeStorageSize" : 679936,
                        "capped" : false,
                        "wiredTiger" : {
                                "metadata" : {
                                        "formatVersion" : 1
                                }
                                .........
                                
                "shard2" : {
                        "ns" : "testdb.order",
                        "size" : 2816622,
                        "count" : 33576,
                        "avgObjSize" : 83,
                        "storageSize" : 1396736,
                        "freeStorageSize" : 692224,
                        "capped" : false,
                        "wiredTiger" : {
                                "metadata" : {
                                        "formatVersion" : 1
                                }
                                .........
                "shard3" : {
                        "ns" : "testdb.order",
                        "size" : 2814209,
                        "count" : 33546,
                        "avgObjSize" : 83,
                        "storageSize" : 1388544,
                        "freeStorageSize" : 688128,
                        "capped" : false,
                        "wiredTiger" : {
                                "metadata" : {
                                        "formatVersion" : 1
                                }
                                .........
              
              
     以看到數據分到3個分片，各自分片數量爲： shard1 “count” : 32877，shard2 “count” : 33576，shard3 “count” : 33547
  • 參考文獻
https://blog.csdn.net/msh6453/article/details/131161845
https://blog.csdn.net/weixin_49724150/article/details/121748365
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