MongoDB分布式集群分片
阿新 • • 發佈:2018-10-14
ngs ash pat ssm 需要 mongodb pos yum源 保存 MongoDB高可用集群搭建
一、環境準備
# 啟動時需要使用非root用戶,所有創建一個mongo用戶: useradd mongo # 為mongo用戶添加密碼: echo 123456 | passwd --stdin mongo # 將mongo添加到sudoers echo "mongo ALL = (root) NOPASSWD:ALL" | tee /etc/sudoers.d/mongo chmod 0440 /etc/sudoers.d/mongo #解決sudo: sorry, you must have a tty to run sudo問題,在/etc/sudoer註釋掉 Default requiretty 一行 sudo sed -i ‘s/Defaults requiretty/Defaults:chiansun !requiretty/‘ /etc/sudoers # 創建一個mongo目錄 mkdir /mongo # 給相應的目錄添加權限 chown -R mongo:mongo /mongo # 配置mongo的yum源 cat >> /etc/yum.repos.d/mongodb-org-4.0.repo << EOF [mongodb-org-4.0] name=MongoDB Repository baseurl=http://repo.mongodb.org/yum/redhat/\$releasever/mongodb-org/4.0/x86_64/ gpgcheck=1 enabled=1 gpgkey=https://www.mongodb.org/static/pgp/server-4.0.asc EOF # 關閉selinux sed -i ‘s/SELINUX=enforcing/SELINUX=disabled/‘ /etc/selinux/config setenforce 0 # 關閉防火墻 systemctl disable firewalld systemctl stop firewalld
二、主機規劃
192.168.33.14 node-1 192.168.33.15 node-2 192.168.33.16 node-3 node-1 node-2 node-3 mongos mongos mongos 路由服務器,尋址 config config config 配置服務器,保存配置 shard1主 shard2主 shard3主 分片:保存數據 shard2從 shard3從 shard1從 副本集:備份數據,可以配置讀寫分離(主負責寫,從負責同步數據和讀) shard3從 shard1從 shard2從
三、安裝部署
# 分別在多臺機器上使用mongo用戶登錄 sudo yum install -y mongodb-org # 分別在多臺機器上創建mongo config server對應的目錄 mkdir -p /mongo/config/{log,data,run} # 分別在多臺機器上修改config server的配置文件 cat > /mongo/config/mongod.conf << EOF systemLog: destination: file logAppend: true path: /mongo/config/log/mongod.log storage: dbPath: /mongo/config/data journal: enabled: true processManagement: fork: true pidFilePath: /mongo/config/run/mongod.pid net: port: 27100 bindIp: 0.0.0.0 replication: replSetName: config sharding: clusterRole: configsvr EOF # 啟動所有的mongo config server服務 mongod --config /mongo/config/mongod.conf # 登錄任意一臺配置服務器,初始化配置副本集 mongo --port 27100 # 創建配置 # id名要和replSetName名保持一致 config = { _id : "config", members : [ {_id : 0, host : "192.168.33.14:27100" }, {_id : 1, host : "192.168.33.15:27100" }, {_id : 2, host : "192.168.33.16:27100" } ] } # 初始化副本集配置 rs.initiate(config) # 查看分區狀態 rs.status() # 註意:其中,"_id" : "config"應與配置文件中配置的 replicaction.replSetName 一致,"members" 中的 "host" 為三個節點的ip和port
1.配置第一個分片和副本集
# 修改mongo shard1 server的配置文件
mkdir -p /mongo/shard1/{log,data,run}
# 分別在多臺機器上修改shard1 server的配置文件
cat > /mongo/shard1/mongod.conf << EOF
systemLog:
destination: file
logAppend: true
path: /mongo/shard1/log/mongod.log
storage:
dbPath: /mongo/shard1/data
journal:
enabled: true
processManagement:
fork: true
pidFilePath: /mongo/shard1/run/mongod.pid
net:
port: 27001
bindIp: 0.0.0.0
replication:
replSetName: shard1
sharding:
clusterRole: shardsvr
EOF
# 啟動所有的shard1 server
mongod --config /mongo/shard1/mongod.conf
# 登陸任意一臺shard1服務器,初始化副本集
mongo --port 27001
# 使用admin數據庫
use admin
# 定義副本集配置
config = {
_id : "shard1",
members : [
{_id : 0, host : "192.168.33.14:27001" },
{_id : 1, host : "192.168.33.15:27001" },
{_id : 2, host : "192.168.33.16:27001" }
]
}
# 初始化副本集配置
rs.initiate(config);
# 查看分區狀態
rs.status()
2.配置第二個分片和副本集
# 修改mongo shard2 server的配置文件
mkdir -p /mongo/shard2/{log,data,run}
# 分別在多臺機器上修改shard2 server的配置文件
cat > /mongo/shard2/mongod.conf << EOF
systemLog:
destination: file
logAppend: true
path: /mongo/shard2/log/mongod.log
storage:
dbPath: /mongo/shard2/data
journal:
enabled: true
processManagement:
fork: true
pidFilePath: /mongo/shard2/run/mongod.pid
net:
port: 27002
bindIp: 0.0.0.0
replication:
replSetName: shard2
sharding:
clusterRole: shardsvr
EOF
# 啟動所有的shard2 server
mongod --config /mongo/shard2/mongod.conf
# 登陸任意一臺shard2服務器,初始化副本集
mongo --port 27002
# 使用admin數據庫
use admin
# 定義副本集配置
config = {
_id : "shard2",
members : [
{_id : 0, host : "192.168.33.14:27002" },
{_id : 1, host : "192.168.33.15:27002" },
{_id : 2, host : "192.168.33.16:27002" }
]
}
# 初始化副本集配置
rs.initiate(config)
# 查看分區狀態
rs.status()
3.配置第三個分片和副本集
# 修改mongo shard3 server的配置文件
mkdir -p /mongo/shard3/{log,data,run}
# 分別在多臺機器上修改shard3 server的配置文件
cat > /mongo/shard3/mongod.conf << EOF
systemLog:
destination: file
logAppend: true
path: /mongo/shard3/log/mongod.log
storage:
dbPath: /mongo/shard3/data
journal:
enabled: true
processManagement:
fork: true
pidFilePath: /mongo/shard3/run/mongod.pid
net:
port: 27003
bindIp: 0.0.0.0
replication:
replSetName: shard3
sharding:
clusterRole: shardsvr
EOF
# 啟動所有的shard3 server
mongod --config /mongo/shard3/mongod.conf
# 登陸任意一臺的shard3服務器,初始化副本集
mongo --port 27003
# 使用admin數據庫
use admin
# 定義副本集配置
config = {
_id : "shard3",
members : [
{_id : 0, host : "192.168.33.14:27003" },
{_id : 1, host : "192.168.33.15:27003" },
{_id : 2, host : "192.168.33.16:27003" }
]
}
# 初始化副本集配置
rs.initiate(config)
# 查看分區狀態
rs.status()
4.配置mongos路由器
##### 註意:啟動mongos是守候進程是因為/mongo/mongos/mongod.conf缺少了fork: true這個配置#######
------------------------------------------------------------------------------------------
mkdir -p /mongo/mongos/{log,data,run}
# 添加mongs的配置文件
cat > /mongo/mongos/mongod.conf << EOF
systemLog:
destination: file
logAppend: true
path: /mongo/mongos/log/mongod.log
processManagement:
fork: true
pidFilePath: /mongo/mongos/run/mongod.pid
net:
port: 27200
bindIp: 0.0.0.0
sharding:
configDB: config/192.168.33.14:27100,192.168.33.15:27100,192.168.33.16:27100
EOF
# 註意,這裏configDB後面的config要與配置服務器的_id保持一致
# 啟動路由服務器
mongos --config /mongo/mongos/mongod.conf
# 登錄其中的一臺路由節點,手動啟用分片
mongo --port 27200
# 添加分片到mongos
sh.addShard("shard1/192.168.33.14:27001,192.168.33.15:27001,192.168.33.16:27001")
sh.addShard("shard2/192.168.33.15:27002,192.168.33.16:27002,192.168.33.14:27002")
sh.addShard("shard3/192.168.33.16:27003,192.168.33.14:27003,192.168.33.15:27003")
# 設置slave可讀
rs.slaveOk()
5.常用操作
#沒有分片是因為沒有開啟分片規則
# 對bike這個數據庫開啟分片功能
use admin
db.runCommand({"enablesharding":"bike"})
# 對bike數據庫下的users集合按id的hash進行分片
db.runCommand({"shardcollection":"bike.users","key":{_id:‘hashed‘}})
# 啟動所有的config server
mongod --config /mongo/config/mongod.conf
# 啟動所有的shard1
mongod --config /mongo/shard1/mongod.conf
# 啟動所有的shard2
mongod --config /mongo/shard2/mongod.conf
# 啟動所有的shard3
mongod --config /mongo/shard3/mongod.conf
# 啟動所有的mongos
mongos --config /mongo/mongos/mongod.conf
# 關閉服務
mongod --shutdown --dbpath /mongo/shard3/data
mongod --shutdown --dbpath /mongo/shard2/data
mongod --shutdown --dbpath /mongo/shard1/data
mongod --shutdown --dbpath /mongo/config/data
MongoDB分布式集群分片