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CentS 7.3 搭建 Redis-4.0.1 Cluster 集群服務(wù)

環(huán)境

  • VMware版本號(hào)：12.0.0
  • centos版本：CentOS 7.3.1611
  • 三臺(tái)虛擬機(jī)(IP)：192.168.252.101,192.168.102..102,192.168.252.103

注意事項(xiàng)

安裝 GCC 編譯工具 不然會(huì)有編譯不過(guò)的問(wèn)題

創(chuàng)新互聯(lián)建站堅(jiān)持“要么做到，要么別承諾”的工作理念，服務(wù)領(lǐng)域包括：網(wǎng)站建設(shè)、做網(wǎng)站、企業(yè)官網(wǎng)、英文網(wǎng)站、手機(jī)端網(wǎng)站、網(wǎng)站推廣等服務(wù)，滿足客戶于互聯(lián)網(wǎng)時(shí)代的隨州網(wǎng)站設(shè)計(jì)、移動(dòng)媒體設(shè)計(jì)的需求，幫助企業(yè)找到有效的互聯(lián)網(wǎng)解決方案。努力成為您成熟可靠的網(wǎng)絡(luò)建設(shè)合作伙伴！

 

$ yum install -y gcc g++ gcc-c++ make

升級(jí)所有的包，防止出現(xiàn)版本過(guò)久不兼容問(wèn)題

 

$ yum -y update

關(guān)閉防火墻 節(jié)點(diǎn)之前需要開(kāi)放指定端口，為了方便，生產(chǎn)不要禁用

centos 6.x

 

$ service iptables stop # 關(guān)閉命令：

centos 7.x

 

$ systemctl stop firewalld.service # 停止firewall

集群搭建

安裝 Redis

下載，解壓，編譯安裝

 

cd /opt
$ wget http://download.redis.io/releases/redis-4.0.1.tar.gz
$ tar xzf redis-4.0.1.tar.gz
$ cd redis-4.0.1
$ make

如果因?yàn)樯洗尉幾g失敗，有殘留的文件

 

$ make distclean

創(chuàng)建節(jié)點(diǎn)

1.首先在 192.168.252.101機(jī)器上 /opt/redis-4.0.1目錄下創(chuàng)建 redis-cluster 目錄

 

$ mkdir /opt/redis-4.0.1/redis-cluster

2.在 redis-cluster 目錄下，創(chuàng)建名為7000、7001、7002的目錄

 

$ cd /opt/redis-4.0.1/redis-cluster
$ mkdir 7000 7001 7002

3.分別修改這三個(gè)配置文件，把如下redis.conf 配置內(nèi)容粘貼進(jìn)去

 

$ vi 7000/redis.conf 
$ vi 7001/redis.conf
$ vi 7002/redis.conf

redis.conf 配置

 

port 7000
bind 192.168.252.101
daemonize yes
pidfile /var/run/redis_7000.pid
cluster-enabled yes
cluster-config-file nodes_7000.conf
cluster-node-timeout 10100
appendonly yes

redis.conf 配置說(shuō)明

 

#端口7000,7001,7002
port 7000

#默認(rèn)ip為127.0.0.1，需要改為其他節(jié)點(diǎn)機(jī)器可訪問(wèn)的ip，否則創(chuàng)建集群時(shí)無(wú)法訪問(wèn)對(duì)應(yīng)的端口，無(wú)法創(chuàng)建集群
bind 192.168.252.101

#redis后臺(tái)運(yùn)行
daemonize yes

#pidfile文件對(duì)應(yīng)7000，7001，7002
pidfile /var/run/redis_7000.pid

#開(kāi)啟集群，把注釋#去掉
cluster-enabled yes

#集群的配置，配置文件首次啟動(dòng)自動(dòng)生成 7000，7001，7002          
cluster-config-file nodes_7000.conf

#請(qǐng)求超時(shí)，默認(rèn)15秒，可自行設(shè)置 
cluster-node-timeout 10100    
        
#aof日志開(kāi)啟，有需要就開(kāi)啟，它會(huì)每次寫(xiě)操作都記錄一條日志
appendonly yes

接著在另外兩臺(tái)機(jī)器上(192.168.252.102，192.168.252.103)重復(fù)以上三步，只是把目錄改為7003、7004、7005、7006、7007、7008對(duì)應(yīng)的配置文件也按照這個(gè)規(guī)則修改即可

啟動(dòng)集群

 

#第一臺(tái)機(jī)器上執(zhí)行 3個(gè)節(jié)點(diǎn)
$ for((i=0;i<=2;i++)); do /opt/redis-4.0.1/src/redis-server /opt/redis-4.0.1/redis-cluster/700$i/redis.conf; done

#第二臺(tái)機(jī)器上執(zhí)行 3個(gè)節(jié)點(diǎn)
$ for((i=3;i<=5;i++)); do /opt/redis-4.0.1/src/redis-server /opt/redis-4.0.1/redis-cluster/700$i/redis.conf; done
                     
#第三臺(tái)機(jī)器上執(zhí)行 3個(gè)節(jié)點(diǎn) 
$ for((i=6;i<=8;i++)); do /opt/redis-4.0.1/src/redis-server /opt/redis-4.0.1/redis-cluster/700$i/redis.conf; done

檢查服務(wù)

檢查各 Redis 各個(gè)節(jié)點(diǎn)啟動(dòng)情況

 

$ ps -ef | grep redis           //redis是否啟動(dòng)成功
$ netstat -tnlp | grep redis    //監(jiān)聽(tīng)redis端口

安裝 Ruby

 

$ yum -y install ruby ruby-devel rubygems rpm-build $ gem install redis

創(chuàng)建集群

注意：在任意一臺(tái)上運(yùn)行 不要在每臺(tái)機(jī)器上都運(yùn)行，一臺(tái)就夠了

Redis 官方提供了 redis-trib.rb 這個(gè)工具，就在解壓目錄的 src 目錄中

 

$ /opt/redis-4.0.1/src/redis-trib.rb create --replicas 1 192.168.252.101:7000 192.168.252.101:7001 192.168.252.101:7002 192.168.252.102:7003 192.168.252.102:7004 192.168.252.102:7005 192.168.252.103:7006 192.168.252.103:7007 192.168.252.103:7008

出現(xiàn)以下內(nèi)容

 

[root@localhost redis-cluster]# /opt/redis-4.0.1/src/redis-trib.rb create --replicas 1 192.168.252.101:7000 192.168.252.101:7001 192.168.252.101:7002 192.168.252.102:7003 192.168.252.102:7004 192.168.252.102:7005 192.168.252.103:7006 192.168.252.103:7007 192.168.252.103:7008
>>> Creating cluster
>>> Performing hash slots allocation on 9 nodes...
Using 4 masters:
192.168.252.101:7000
192.168.252.102:7003
192.168.252.103:7006
192.168.252.101:7001
Adding replica 192.168.252.102:7004 to 192.168.252.101:7000
Adding replica 192.168.252.103:7007 to 192.168.252.102:7003
Adding replica 192.168.252.101:7002 to 192.168.252.103:7006
Adding replica 192.168.252.102:7005 to 192.168.252.101:7001
Adding replica 192.168.252.103:7008 to 192.168.252.101:7000
M: 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf 192.168.252.101:7000
 slots:0-4095 (4096 slots) master
M: 44c81c15b01d992cb9ede4ad35477ec853d70723 192.168.252.101:7001
 slots:12288-16383 (4096 slots) master
S: 38f03c27af39723e1828eb62d1775c4b6e2c3638 192.168.252.101:7002
   replicates f1abb62a8c9b448ea14db421bdfe3f1d8075189c
M: 987965baf505a9aa43e50e46c76189c51a8f17ec 192.168.252.102:7003
 slots:4096-8191 (4096 slots) master
S: 6555292fed9c5d52fcf5b983c441aff6f96923d5 192.168.252.102:7004
   replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
S: 2b5ba254a0405d4efde4c459867b15176f79244a 192.168.252.102:7005
   replicates 44c81c15b01d992cb9ede4ad35477ec853d70723
M: f1abb62a8c9b448ea14db421bdfe3f1d8075189c 192.168.252.103:7006
 slots:8192-12287 (4096 slots) master
S: eb4067373d36d8a8df07951f92794e67a6aac022 192.168.252.103:7007
   replicates 987965baf505a9aa43e50e46c76189c51a8f17ec
S: 2919e041dd3d1daf176d6800dcd262f4e727f366 192.168.252.103:7008
   replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
Can I set the above configuration? (type 'yes' to accept): yes

輸入 yes

 

>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join.........
>>> Performing Cluster Check (using node 192.168.252.101:7000)
M: 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf 192.168.252.101:7000
   slots:0-4095 (4096 slots) master
   2 additional replica(s)
S: 6555292fed9c5d52fcf5b983c441aff6f96923d5 192.168.252.102:7004
   slots: (0 slots) slave
   replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
M: 44c81c15b01d992cb9ede4ad35477ec853d70723 192.168.252.101:7001
   slots:12288-16383 (4096 slots) master
   1 additional replica(s)
S: 2919e041dd3d1daf176d6800dcd262f4e727f366 192.168.252.103:7008
   slots: (0 slots) slave
   replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
M: f1abb62a8c9b448ea14db421bdfe3f1d8075189c 192.168.252.103:7006
   slots:8192-12287 (4096 slots) master
   1 additional replica(s)
S: eb4067373d36d8a8df07951f92794e67a6aac022 192.168.252.103:7007
   slots: (0 slots) slave
   replicates 987965baf505a9aa43e50e46c76189c51a8f17ec
S: 38f03c27af39723e1828eb62d1775c4b6e2c3638 192.168.252.101:7002
   slots: (0 slots) slave
   replicates f1abb62a8c9b448ea14db421bdfe3f1d8075189c
S: 2b5ba254a0405d4efde4c459867b15176f79244a 192.168.252.102:7005
   slots: (0 slots) slave
   replicates 44c81c15b01d992cb9ede4ad35477ec853d70723
M: 987965baf505a9aa43e50e46c76189c51a8f17ec 192.168.252.102:7003
   slots:4096-8191 (4096 slots) master
   1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

關(guān)閉集群

這樣也可以，推薦

 

$ pkill redis

循環(huán)節(jié)點(diǎn)逐個(gè)關(guān)閉

 

$ for((i=0;i<=2;i++)); do /opt/redis-4.0.1/src/redis-cli -c -h 192.168.252.101 -p 700$i shutdown; done

$ for((i=3;i<=5;i++)); do /opt/redis-4.0.1/src/redis-cli -c -h 192.168.252.102 -p 700$i shutdown; done

$ for((i=6;i<=8;i++)); do /opt/redis-4.0.1/src/redis-cli -c -h 192.168.252.103 -p 700$i shutdown; done

集群驗(yàn)證

連接集群測(cè)試

參數(shù) -C 可連接到集群，因?yàn)?redis.conf 將 bind 改為了ip地址，所以 -h 參數(shù)不可以省略，-p 參數(shù)為端口號(hào)

  • 我們?cè)?92.168.252.101機(jī)器redis 7000 的節(jié)點(diǎn)set 一個(gè)key

 

$ /opt/redis-4.0.1/src/redis-cli -h 192.168.252.101 -c -p 7000
192.168.252.101:7000> set name www.ymq.io
-> Redirected to slot [5798] located at 192.168.252.102:7003
OK
192.168.252.102:7003> get name
"www.ymq.io"
192.168.252.102:7003>

發(fā)現(xiàn)redis set name 之后重定向到192.168.252.102機(jī)器 redis 7003 這個(gè)節(jié)點(diǎn)

  • 我們?cè)?92.168.252.103機(jī)器redis 7008 的節(jié)點(diǎn)get一個(gè)key

 

[root@localhost redis-cluster]# /opt/redis-4.0.1/src/redis-cli -h 192.168.252.103 -c -p 7008
192.168.252.103:7008> get name
-> Redirected to slot [5798] located at 192.168.252.102:7003
"www.ymq.io"
192.168.252.102:7003>

發(fā)現(xiàn)redis get name 重定向到192.168.252.102機(jī)器 redis 7003 這個(gè)節(jié)點(diǎn)

如果您看到這樣的現(xiàn)象，說(shuō)明集群已經(jīng)是可用的了

檢查集群狀態(tài)

 

$ /opt/redis-4.0.1/src/redis-trib.rb check 192.168.252.101:7000

 

>>> Performing Cluster Check (using node 192.168.252.101:7000)
M: 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf 192.168.252.101:7000
   slots:0-4095 (4096 slots) master
   2 additional replica(s)
S: 6555292fed9c5d52fcf5b983c441aff6f96923d5 192.168.252.102:7004
   slots: (0 slots) slave
   replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
M: 44c81c15b01d992cb9ede4ad35477ec853d70723 192.168.252.101:7001
   slots:12288-16383 (4096 slots) master
   1 additional replica(s)
S: 2919e041dd3d1daf176d6800dcd262f4e727f366 192.168.252.103:7008
   slots: (0 slots) slave
   replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
M: f1abb62a8c9b448ea14db421bdfe3f1d8075189c 192.168.252.103:7006
   slots:8192-12287 (4096 slots) master
   1 additional replica(s)
S: eb4067373d36d8a8df07951f92794e67a6aac022 192.168.252.103:7007
   slots: (0 slots) slave
   replicates 987965baf505a9aa43e50e46c76189c51a8f17ec
S: 38f03c27af39723e1828eb62d1775c4b6e2c3638 192.168.252.101:7002
   slots: (0 slots) slave
   replicates f1abb62a8c9b448ea14db421bdfe3f1d8075189c
S: 2b5ba254a0405d4efde4c459867b15176f79244a 192.168.252.102:7005
   slots: (0 slots) slave
   replicates 44c81c15b01d992cb9ede4ad35477ec853d70723
M: 987965baf505a9aa43e50e46c76189c51a8f17ec 192.168.252.102:7003
   slots:4096-8191 (4096 slots) master
   1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

列出集群節(jié)點(diǎn)

列出集群當(dāng)前已知的所有節(jié)點(diǎn)（node），以及這些節(jié)點(diǎn)的相關(guān)信息

 

$ /opt/redis-4.0.1/src/redis-cli -h 192.168.252.101 -c -p 7000

192.168.252.101:7000> cluster nodes

 

6555292fed9c5d52fcf5b983c441aff6f96923d5 192.168.252.102:7004@17004 slave 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf 0 1502815268317 5 connected
44c81c15b01d992cb9ede4ad35477ec853d70723 192.168.252.101:7001@17001 master - 0 1502815268000 2 connected 12288-16383
2919e041dd3d1daf176d6800dcd262f4e727f366 192.168.252.103:7008@17008 slave 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf 0 1502815269000 9 connected
7c622ac191edd40dd61d9b79b27f6f69d02a5bbf 192.168.252.101:7000@17000 myself,master - 0 1502815269000 1 connected 0-4095
f1abb62a8c9b448ea14db421bdfe3f1d8075189c 192.168.252.103:7006@17006 master - 0 1502815269000 7 connected 8192-12287
eb4067373d36d8a8df07951f92794e67a6aac022 192.168.252.103:7007@17007 slave 987965baf505a9aa43e50e46c76189c51a8f17ec 0 1502815267000 8 connected
38f03c27af39723e1828eb62d1775c4b6e2c3638 192.168.252.101:7002@17002 slave f1abb62a8c9b448ea14db421bdfe3f1d8075189c 0 1502815269327 7 connected
2b5ba254a0405d4efde4c459867b15176f79244a 192.168.252.102:7005@17005 slave 44c81c15b01d992cb9ede4ad35477ec853d70723 0 1502815270336 6 connected
987965baf505a9aa43e50e46c76189c51a8f17ec 192.168.252.102:7003@17003 master - 0 1502815271345 4 connected 4096-8191
192.168.252.101:7000>

打印集群信息

 

$ 192.168.252.101:7000> cluster info

 

cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:9
cluster_size:4
cluster_current_epoch:9
cluster_my_epoch:1
cluster_stats_messages_ping_sent:485
cluster_stats_messages_pong_sent:485
cluster_stats_messages_sent:970
cluster_stats_messages_ping_received:477
cluster_stats_messages_pong_received:485
cluster_stats_messages_meet_received:8
cluster_stats_messages_received:970
192.168.252.101:7000>

集群命令

語(yǔ)法格式

 

redis-cli -c -p port

集群

 

cluster info ：打印集群的信息
cluster nodes ：列出集群當(dāng)前已知的所有節(jié)點(diǎn)（ node），以及這些節(jié)點(diǎn)的相關(guān)信息。

節(jié)點(diǎn)

 

cluster meet   ：將 ip 和 port 所指定的節(jié)點(diǎn)添加到集群當(dāng)中，讓它成為集群的一份子。
cluster forget  ：從集群中移除 node_id 指定的節(jié)點(diǎn)。
cluster replicate  ：將當(dāng)前節(jié)點(diǎn)設(shè)置為 node_id 指定的節(jié)點(diǎn)的從節(jié)點(diǎn)。
cluster saveconfig ：將節(jié)點(diǎn)的配置文件保存到硬盤(pán)里面。

槽(slot)

 

cluster addslots  [slot ...] ：將一個(gè)或多個(gè)槽（ slot）指派（ assign）給當(dāng)前節(jié)點(diǎn)。
cluster delslots  [slot ...] ：移除一個(gè)或多個(gè)槽對(duì)當(dāng)前節(jié)點(diǎn)的指派。
cluster flushslots ：移除指派給當(dāng)前節(jié)點(diǎn)的所有槽，讓當(dāng)前節(jié)點(diǎn)變成一個(gè)沒(méi)有指派任何槽的節(jié)點(diǎn)。
cluster setslot  node  ：將槽 slot 指派給 node_id 指定的節(jié)點(diǎn)，如果槽已經(jīng)指派給另一個(gè)節(jié)點(diǎn)，那么先讓另一個(gè)節(jié)點(diǎn)刪除該槽>，然后再進(jìn)行指派。
cluster setslot  migrating  ：將本節(jié)點(diǎn)的槽 slot 遷移到 node_id 指定的節(jié)點(diǎn)中。
cluster setslot  importing  ：從 node_id 指定的節(jié)點(diǎn)中導(dǎo)入槽 slot 到本節(jié)點(diǎn)。
cluster setslot  stable ：取消對(duì)槽 slot 的導(dǎo)入（ import）或者遷移（ migrate）。

鍵

 

cluster keyslot  ：計(jì)算鍵 key 應(yīng)該被放置在哪個(gè)槽上。
cluster countkeysinslot  ：返回槽 slot 目前包含的鍵值對(duì)數(shù)量。
cluster getkeysinslot   ：返回 count 個(gè) slot 槽中的鍵 。

本文名稱(chēng)：CentS 7.3 搭建 Redis-4.0.1 Cluster 集群服務(wù)
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