Redis搭建

?

部署redis集群環(huán)境

1)配置6臺(tái)redis服務(wù)器

2）準(zhǔn)備環(huán)境

如下修改每臺(tái)配置文件參數(shù)

IP 規(guī)劃

? redis 服務(wù)器 ip 地址及端口規(guī)劃

– redisA 192.168.4.51?? 6351

– redisB 192.168.4.52?? 6352

– redisC 192.168.4.53?? 6353

– redisD 192.168.4.54?? 6354

– redisE 192.168.4.55?? 6355

– redisF 192.168.4.56??6356


#vim /etc/redis/6379.conf

bind IP 地址?? //只寫物理接口 IP 地址

daemonize yes? //守護(hù)進(jìn)程方式運(yùn)行

port xxxx????? //端口號(hào)不要使用默認(rèn)的6379

cluster-enabled yes??? //開(kāi)啟集群

cluster-config-file nodes.conf? //集群的配置文件不要使用默認(rèn)的名稱

cluster-node-timeout 5000??? //請(qǐng)求超時(shí) 5 秒???


3）修改/etc/init.d/redis.6379啟動(dòng)腳本 并啟動(dòng)redis?


[root@host51 ~]# ss -nuplt | grep redis

tcp??? LISTEN???? 0?????128??? 192.168.4.51:6351????????????????? *:*??????????????????users:(("redis-server",pid=27627,fd=6))

tcp??? LISTEN???? 0?????128? ??192.168.4.51:16351???????????????? *:*??????????????????users:(("redis-server",pid=27627,fd=8))

[root@host51 ~]# #####每臺(tái)都會(huì)有兩個(gè)端口 一個(gè)集群時(shí)集群通信


[root@host53 ~]# ls /var/lib/redis/6379/

dump.rdb???????? nodes-6353.conf ##儲(chǔ)存集群信息文件


4）創(chuàng)建集群

[root@host51 src]# pwd

/root/redis-4.0.8/src/redis-trib.rb 創(chuàng)建集群腳本


把ruby腳本拷貝到系統(tǒng)命令路徑下

[root@host51 src]# echo $PATH

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

[root@host51 src]# cp redis-trib.rb /usr/local/sbin/

[root@host51 src]# ls /usr/local/sbin/redis-trib.rb

/usr/local/sbin/redis-trib.rb


安裝ruby腳本運(yùn)行環(huán)境包

[root@host51 redis-cluster]# yum -y install ruby rubygems


rpm -ivh --nodeps ruby-devel-2.0.0.648-30.el7.x86_64.rpm

--nodeps 忽略依賴關(guān)系安裝

[root@host51 redis-cluster]# ls

redis-3.2.1.gem? ruby-devel-2.0.0.648-30.el7.x86_64.rpm

[root@host51 redis-cluster]# gem install redis-3.2.1.gem


[root@host51 redis-cluster]# redis-trib.rb help

Usage: redis-trib


? create????????? host1:port1 ... hostN:portN

?? ???????????????--replicas

? check?????????? host:port

? info??????????? host:port

? fix???????????? host:port

????????????????? --timeout

? reshard???????? host:port

????????????????? --from

????????????????? --to

????????? ????????--slots

創(chuàng)建：

[root@host51 ~]# redis-trib.rb create --replicas 1 \

> 192.168.4.51:6351 \

> 192.168.4.52:6352 \

> 192.168.4.53:6353 \

> 192.168.4.54:6354 \

> 192.168.4.55:6355 \

> 192.168.4.56:6356

--replicas 1 表示自動(dòng)為每一個(gè)master節(jié)點(diǎn)，分配一個(gè)slave 節(jié)點(diǎn)

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.?? ##成功 16384個(gè)hash槽（slots）

[root@host51 ~]#


M: dcdaea3e76b649b9793b4ba25c0480d09e3071b4 192.168.4.51:6351

?? slots:0-5460 (5461 slots) master


M: ddbfc55da0d4e464fa6a9a295db3cc68b8c5491e 192.168.4.52:6352

?? slots:5461-10922 (5462 slots)master


M: be99e13aad8f225410c258eff4713d8e2e334b02 192.168.4.53:6353

?? slots:10923-16383 (5461 slots)master


key/CRC16的值對(duì)16384取余后的值在那個(gè)范圍內(nèi)就存那臺(tái)redis服務(wù)器


查看集群信息

[root@host51 ~]# cat /var/lib/redis/6379/nodes-6351.conf

be99e13aad8f225410c258eff4713d8e2e334b02 192.168.4.53:6353@16353 master - 01530608195025 3 connected 10923-16383

1203e9088538d89286f2e197b1204615d193f842 192.168.4.55:6355@16355 slavedcdaea3e76b649b9793b4ba25c0480d09e3071b4 0 1530608195000 5 connected

dcdaea3e76b649b9793b4ba25c0480d09e3071b4 192.168.4.51:6351@16351myself,master - 0 1530608195000 1 connected 0-5460

78c10670f14c0697c2372c070c41f7b513fb81c2 192.168.4.56:6356@16356 slaveddbfc55da0d4e464fa6a9a295db3cc68b8c5491e 0 1530608196028 6 connected

ddbfc55da0d4e464fa6a9a295db3cc68b8c5491e 192.168.4.52:6352@16352 master - 01530608197033 2 connected 5461-10922

ec6a17092cef51cae2e3db1f3d15e5d95e9a05bb 192.168.4.54:6354@16354 slavebe99e13aad8f225410c258eff4713d8e2e334b02 0 1530608195000 4 connected

vars currentEpoch 6 lastVoteEpoch 0


使用ruby查看集群信息

[root@host52 ~]# redis-cli -h 192.168.4.52 -p 6352

192.168.4.52:6352> cluster nodes

be99e13aad8f225410c258eff4713d8e2e334b02 192.168.4.53:6353@16353 master - 01530609880570 3 connected 10923-16383

1203e9088538d89286f2e197b1204615d193f842 192.168.4.55:6355@16355 slavedcdaea3e76b649b9793b4ba25c0480d09e3071b4 0 1530609881574 5 connected

78c10670f14c0697c2372c070c41f7b513fb81c2 192.168.4.56:6356@16356 slaveddbfc55da0d4e464fa6a9a295db3cc68b8c5491e 0 1530609879566 6 connected

ec6a17092cef51cae2e3db1f3d15e5d95e9a05bb 192.168.4.54:6354@16354 slavebe99e13aad8f225410c258eff4713d8e2e334b02 0 1530609881574 4 connected

dcdaea3e76b649b9793b4ba25c0480d09e3071b4 192.168.4.51:6351@16351 master - 01530609881072 1 connected 0-5460

ddbfc55da0d4e464fa6a9a295db3cc68b8c5491e 192.168.4.52:6352@16352myself,master - 0 1530609881000 2 connected 5461-10922

192.168.4.52:6352> cluster info

cluster_state:ok

cluster_slots_assigned:16384

cluster_slots_ok:16384

cluster_slots_pfail:0

cluster_slots_fail:0

cluster_known_nodes:6

cluster_size:3

cluster_current_epoch:6

cluster_my_epoch:2

cluster_stats_messages_ping_sent:3343

cluster_stats_messages_pong_sent:2988

cluster_stats_messages_meet_sent:4

cluster_stats_messages_sent:6335

cluster_stats_messages_ping_received:2986

cluster_stats_messages_pong_received:3347

cluster_stats_messages_meet_received:2

cluster_stats_messages_received:6335


驗(yàn)證redis集群是否正常：


[root@host53 ~]# ss -nuplt | grep redis

tcp??? LISTEN???? 0?????128??? 192.168.4.53:6353????????????????? *:*??????????????????users:(("redis-server",pid=984,fd=6))

tcp??? LISTEN???? 0?????128??? 192.168.4.53:16353???????????????? *:*?????????????????? users:(("redis-server",pid=984,fd=8))


[root@host53 ~]# redis-cli -h 192.168.4.51 -p 6351

192.168.4.51:6351> cluster info???#查看本機(jī)信息

192.168.4.51:6351> cluster nodes??#查看集群信息


#################################################################

測(cè)試集群

1 在客戶端訪問(wèn)任意一臺(tái)master角色的redis服務(wù)器，查詢數(shù)據(jù)或存儲(chǔ)數(shù)據(jù)

redis-cli -c -h IP地址 -p端口?????????? ##-c是訪問(wèn)集群


[root@host50 ~]# redis-cli -c -h 192.168.4.51 -p 6351

192.168.4.51:6351> keys *

(empty list or set)

192.168.4.51:6351> set name bob

-> Redirected to slot [5798] located at 192.168.4.52:6352

OK??? #####hash槽5798 存在4.52上 去4.52查看


[root@host52 ~]# redis-cli -h 192.168.4.52 -p 6352

192.168.4.52:6352> keys *

1) "name"

192.168.4.52:6352> get name

"bob"

4.56時(shí)52的從庫(kù) 去4.56查看

[root@host56 ~]# redis-cli -h 192.168.4.56 -p 6356

192.168.4.56:6356> keys *

1) "name"

192.168.4.56:6356> get name

(error) MOVED 5798 192.168.4.52:6352#### 56從庫(kù)有，但從庫(kù)默認(rèn)不能查看值，需設(shè)置



192.168.4.52:6352> set age 19

-> Redirected to slot [741] located at 192.168.4.51:6351


192.168.4.52:6352> get age 因?yàn)閍ge存在51上所以52取值報(bào)錯(cuò)，去51上get

(error) MOVED 741 192.168.4.51:6351


192.168.4.51:6351> set age 19

OK

192.168.4.51:6351> get age

"19"


管理集群：redis-trib.rb


redis-trib.rb 腳本

? 語(yǔ)法格式

– Redis-trib.rb

選項(xiàng) 參數(shù)

? 選項(xiàng)

– add-node 添加新節(jié)點(diǎn)

– check 對(duì)節(jié)點(diǎn)主機(jī)做檢查

– reshard 對(duì)節(jié)點(diǎn)主機(jī)重新分片

– add-node --slave 添加從節(jié)點(diǎn)主機(jī)###默認(rèn)為主庫(kù) 加--slave是指定為從庫(kù)

– del-node 刪除節(jié)點(diǎn)主機(jī)


當(dāng)前的主庫(kù)掛掉，他對(duì)應(yīng)的從庫(kù)自動(dòng)升級(jí)為主庫(kù)


[root@host51 ~]# redis-trib.rb help

?check?????????? host:port

[root@host51 ~]# redis-trib.rb check 192.168.4.51:6351

主? 從

51? 55

52? 56

53? 54

現(xiàn)在down掉52 結(jié)果時(shí)56升級(jí)為主從庫(kù)只有兩個(gè) 還是54/55 這時(shí)56主庫(kù)沒(méi)從庫(kù)，如果56在down掉整個(gè)集群就掛掉了（可以一諸多從，解決）

這是52再起，會(huì)變成56的從庫(kù)

[root@host51 ~]# redis-trib.rb check 192.168.4.53:6353

>>> Performing Cluster Check (using node 192.168.4.53:6353)

M: be99e13aad8f225410c258eff4713d8e2e334b02 192.168.4.53:6353

?? slots:10923-16383 (5461 slots)master

?? 1 additional replica(s)

S: ddbfc55da0d4e464fa6a9a295db3cc68b8c5491e 192.168.4.52:6352

?? slots: (0 slots) slave

?? replicates78c10670f14c0697c2372c070c41f7b513fb81c2#####（56的ip）

M: 78c10670f14c0697c2372c070c41f7b513fb81c2 192.168.4.56:6356

?? slots:5461-10922 (5462 slots)master

?? 1 additional replica(s)

M: dcdaea3e76b649b9793b4ba25c0480d09e3071b4 192.168.4.51:6351

?? slots:0-5460 (5461 slots) master

?? 1 additional replica(s)

S: 1203e9088538d89286f2e197b1204615d193f842 192.168.4.55:6355

?? slots: (0 slots) slave

?? replicatesdcdaea3e76b649b9793b4ba25c0480d09e3071b4

S: ec6a17092cef51cae2e3db1f3d15e5d95e9a05bb 192.168.4.54:6354

?? slots: (0 slots) slave

?? replicatesbe99e13aad8f225410c258eff4713d8e2e334b02

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.


添加(準(zhǔn)備50 57兩臺(tái)redis服務(wù)器）

添加master角色主機(jī) 需從新分片

添加slave


將新主機(jī)添加到集群中

– # ./redis-trib.rb add-node 新主機(jī)Ip:端口192.168.4.51:6351

[root@host51 ~]# redis-trib.rb add-node 192.168.4.50:6350 192.168.4.51:6351

手動(dòng)對(duì)集群進(jìn)行重新分片

– src]# ./redis-trib.rb reshard 192.168.4.51:6351


[root@host51 ~]# redis-trib.rb reshard 192.168.4.51:6351

How many slots do you want to move (from 1 to 16384)? 4096

####4臺(tái)主庫(kù)，16384/4=4096(從當(dāng)前集群拿出多少個(gè)hash slots）

What is the receiving node ID? 93b0dd6ce08c2f43c805aee6b3ca7d408f418756

新主庫(kù)id，這個(gè)id可以[root@host50

~]# cat /var/lib/redis/6379/nodes-6350.conf 看也可以

[root@host51 ~]# redis-trib.rb check 192.168.4.51:6351查看

Source node #1:all

Do you want to proceed with the proposed reshard plan (yes/no)? yes

再查看4.51

[root@host51 ~]# redis-trib.rb check 192.168.4.51:6351

M: 93b0dd6ce08c2f43c805aee6b3ca7d408f418756 192.168.4.50:6350

?? slots:0-1364,5461-6826,10923-12287(4096 slots) master

?? 0 additional replica(s) ###（4096個(gè)hash槽)


向新主庫(kù)50上添加slave57

[root@host51 ~]# redis-trib.rb help

add-node??????? new_host:new_portexisting_host:existing_port

??????????????? ??--slave

????????????????? --master-id


添加從節(jié)點(diǎn)

# ./redis-trib.rb add-node --slave --master-id node-id 值

[root@host51 ~]# redis-trib.rb add-node --slave --master-idbe99e13aad8f225410c258eff4713d8e2e334b02 192.168.4.58:6358 192.168.4.51:6351

從節(jié)點(diǎn)ip:端口192.168.4.51:6351

如果不指定主節(jié)點(diǎn)的 id 的話,會(huì)把新節(jié)點(diǎn) 隨機(jī)添加為 從節(jié)點(diǎn) 最少的主的從


[root@host51 ~]# redis-trib.rb add-node --slave 192.168.4.57:6357192.168.4.51:6351


[root@host51 ~]# redis-trib.rb check 192.168.4.51:6351##查看集群信息 查看57是否加入成功


移除slave節(jié)點(diǎn)

[root@host51 ~]# redis-trib.rb del-node 192.168.4.58:6358e928fc152ab568f9a0befc9775b9eb81a1c6ea99


移除master節(jié)點(diǎn)

1)先移出hash sloat

[root@host51 ~]# redis-trib.rb reshard 192.168.4.51:6351

How many slots do you want to move (from 1 to 16384)?4096

有多少hash sloat要移出

What is the receiving node ID?78c10670f14c0697c2372c070c41f7b513fb81c2

誰(shuí)接收移出的hash sloat

Source node #1:93b0dd6ce08c2f43c805aee6b3ca7d408f418756

誰(shuí)移出hash sloat

Source node #2:done? 手動(dòng)輸入done

2)移出

[root@host51 ~]# redis-trib.rb del-node 192.168.4.51:6351 93b0dd6ce08c2f43c805aee6b3ca7d408f418756


移出slave或則master后清空rm

-rf /var/lib/redis/6379/*或者在redis登陸界面輸入

cluster reset 把恢復(fù)成單獨(dú)的redis服務(wù)器



































































































































































#######################################################






























































































?R?*u?v

?著作權(quán)歸作者所有,轉(zhuǎn)載或內(nèi)容合作請(qǐng)聯(lián)系作者
【社區(qū)內(nèi)容提示】社區(qū)部分內(nèi)容疑似由AI輔助生成，瀏覽時(shí)請(qǐng)結(jié)合常識(shí)與多方信息審慎甄別。
平臺(tái)聲明：文章內(nèi)容（如有圖片或視頻亦包括在內(nèi)）由作者上傳并發(fā)布，文章內(nèi)容僅代表作者本人觀點(diǎn)，簡(jiǎn)書系信息發(fā)布平臺(tái)，僅提供信息存儲(chǔ)服務(wù)。

相關(guān)閱讀更多精彩內(nèi)容

  • 1 Redis介紹1.1 什么是NoSql為了解決高并發(fā)、高可擴(kuò)展、高可用、大數(shù)據(jù)存儲(chǔ)問(wèn)題而產(chǎn)生的數(shù)據(jù)庫(kù)解決方...
    克魯?shù)吕?/span>閱讀 5,727評(píng)論 0贊 36
  • 由于redis集群需要使用ruby命令，所以我們需要安裝ruby(所有的操作都是在單機(jī)部署的偽集群模式下進(jìn)行) （...
    蝸牛docom閱讀 514評(píng)論 0贊 2
  • NOSQL類型簡(jiǎn)介鍵值對(duì)：會(huì)使用到一個(gè)哈希表，表中有一個(gè)特定的鍵和一個(gè)指針指向特定的數(shù)據(jù)，如redis，volde...
    MicoCube閱讀 4,160評(píng)論 2贊 27
  • Redis集群 使用redis做緩存工具 實(shí)現(xiàn)系統(tǒng)高可用，redis需要做主備。使用redis做分片集群。 向業(yè)務(wù)...
    tanghuibook閱讀 616評(píng)論 0贊 0
  • 我們走了一光年 我們走了一光年，可我們誰(shuí)都不想在誰(shuí)的記憶里成為滯留太久的帆船，而是愿做那一顆不明不暗的星星，陪你到...
    水西閱讀 832評(píng)論 6贊 4

友情鏈接更多精彩內(nèi)容