1. 程式人生 > >MongoDB Replica Set搭建

MongoDB Replica Set搭建

第0部分 業務資訊


業務名稱: xyz

埠號: 28017



第1部分 準備環境


建立mongodb使用者

# useradd mongodb


建立資料目錄

# mkdir -pv /data1/mongodb/28017/data

# chown -R mongodb.mongodb /data1/mongodb/28017/data/


建立配置, 日誌檔案目錄

# mkdir -pv /home/mongodb/mongodb/xyz/28017/{conf,logs,pid}


準備配置檔案

# cat /home/mongodb/mongodb/xyz/28017/conf/mongodb.conf

##General options

port = 28017

maxConns = 1024

logpath = /home/mongodb/mongodb/xyz/28017/logs/mongodb.log

logappend = false

logRotate = rename

timeStampFormat = iso8601-local

pidfilepath = /home/mongodb/mongodb/xyz/28017/pid/mongodb.pid

#keyFile = /home/mongodb/mongodb/xyz/28017/conf/mongodb.key

httpinterface = false

nounixsocket = true

fork = true

#auth = true

slowms = 100

profile = 1


##Replication options

oplogSize = 5120


##Replica set options

replSet = xyz


##Storage options

storageEngine = wiredTiger

dbpath = /data1/mongodb/28017/data/

directoryperdb = true

journal = true


##WiredTiger options

wiredTigerCacheSizeGB = 5


# chown -R mongodb.mongodb /home/mongodb/mongodb/xyz/28017/{conf,logs,pid}



第2部分 調整作業系統引數


切換到mongodb使用者.

# su - mongodb


啟動mongodb程序.

$ /usr/local/mongodb/bin/mongod --config /home/mongodb/mongodb/xyz/28017/conf/mongodb.conf


根據日誌提示的WARNING, 調整作業系統引數.

$ cat /home/mongodb/mongodb/xyz/28017/logs/mongodb.log

2018-11-07T17:03:40.974+0800 I CONTROL  [initandlisten]

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] ** WARNING: You are running on a NUMA machine.

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] **          We suggest launching mongod like this to avoid performance problems:

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] **              numactl --interleave=all mongod [other options]

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten]

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten]

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten]

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 32000 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.

2018-11-07T17:03:40.975+0800 I CONTROL  [initandlisten]


調整系統引數

# echo 'never' > /sys/kernel/mm/transparent_hugepage/enabled

# echo 'never' > /sys/kernel/mm/transparent_hugepage/defrag


# tail -n 4 /etc/security/limits.conf

mongodb soft nofile 64000

mongodb hard nofile 64000

mongodb soft nproc 64000

mongodb hard nproc 64000


關閉mongodb程序.

$ /usr/local/mongodb/bin/mongo --port 28017 --host localhost

MongoDB shell version v3.4.3

connecting to: mongodb://localhost:28017/

MongoDB server version: 3.4.3

> use admin

switched to db admin


> db.shutdownServer()

server should be down...


再次啟動mongodb程序.

$ numactl --interleave=all /usr/local/mongodb/bin/mongod --config /home/mongodb/mongodb/xyz/28017/conf/mongodb.conf



第3部分 初始化副本集


保持開啟replSet, 關閉keyFile和auth引數.

$ /usr/local/mongodb/bin/mongo --port 28017 --host localhost

> config = {_id: "xyz", members: [{_id: 0, host: "192.168.1.157:28017"}, {_id: 1, host: "192.168.1.158:28017"}, {_id: 2, host: "192.168.1.159:28017"}]}

{

"_id" : "xyz",

"members" : [

{

"_id" : 0,

"host" : "192.168.1.157:28017"

},

{

"_id" : 1,

"host" : "192.168.1.158:28017"

},

{

"_id" : 2,

"host" : "192.168.1.159:28017"

}

]

}


> rs.initiate(config)

{ "ok" : 1 }


建立管理使用者

xyz:PRIMARY> use admin

switched to db admin


xyz:PRIMARY> db.createUser({user: "root", pwd: "root_password", roles: [{role: "root", db: "admin"}]})

Successfully added user: {

"user" : "root",

"roles" : [

{

"role" : "root",

"db" : "admin"

}

]

}


關閉mongodb程序, 準備key檔案.

$ echo 'L6rE59OEHWGeQAIIZHy3uXNj1cxu9lFuCJxZSejf' > /home/mongodb/mongodb/xyz/28017/conf/mongodb.key


$ chmod 600 /home/mongodb/mongodb/xyz/28017/conf/mongodb.key


開啟keyFile和auth引數, 啟動mongodb程序, 登陸.

$ /usr/local/mongodb/bin/mongo --port 28017 --host localhost --username root --password root_password --authenticationDatabase admin



第4部分 部署業務


建立業務使用者

xyz:PRIMARY> use abc

switched to db abc


xyz:PRIMARY> db.createUser({user : "abc_user", pwd : "xyzabc", roles : [{role : "readWrite", db : "abc"}]})

Successfully added user: {

"user" : "abc_user",

"roles" : [

{

"role" : "readWrite",

"db" : "abc"

}

]

}


業務使用者abc_user登陸.

$ /usr/local/mongodb/bin/mongo --port 28017 --host localhost --username abc_user --password xyzabc --authenticationDatabase abc

xyz:PRIMARY> db

test


xyz:PRIMARY> use abc

switched to db abc


xyz:PRIMARY> db.tt.insert({"name" : "abc"})

WriteResult({ "nInserted" : 1 })


xyz:PRIMARY> show collections

tt


xyz:PRIMARY> db.tt.find()

{ "_id" : ObjectId("5be3ffb4832bb6db59e4e60f"), "name" : "abc" }


若感興趣可關注訂閱號”資料庫最佳實踐”(DBBestPractice).

qrcode_for_gh_54ffa7e55478_258.jpg