CentOS 7下安裝 redis 3.0.6并配置集群的過程詳解
安裝依賴
[root@centos7-1 ~]# yum -y install gcc openssl-devel libyaml-devel libffi-devel readline-devel zlib-devel gdbm-devel ncurses-devel gcc-c++ automake autoconf
安裝 redis
[root@centos7-1 ~]# wget http://download.redis.io/releases/redis-3.0.6.tar.gz [root@centos7-1 ~]# tar xvf redis-3.0.6.tar.gz [root@centos7-1 ~]# cd redis-3.0.6/ [root@centos7-1 redis-3.0.6]# make MALLOC=libc [root@centos7-1 redis-3.0.6]# make install
啟動(dòng) server
通過命令 redis-server
來啟動(dòng) redis server
。通過下面的輸出信息可以看出這次啟動(dòng)并沒有指定配置文件,可以使用命令 redis-server /path/to/redis.conf
來指定具體的配置文件啟動(dòng)。
[root@centos7-1 redis-3.0.6]# redis-server 4435:C 25 Jan 11:40:48.816 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf 4435:M 25 Jan 11:40:48.817 * Increased maximum number of open files to 10032 (it was originally set to 1024). _._ _.-``__ ''-._ _.-`` `. `_. ''-._ Redis 3.0.6 (00000000/0) 64 bit .-`` .-```. ```\/ _.,_ ''-._ ( ' , .-` | `, ) Running in standalone mode |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379 | `-._ `._ / _.-' | PID: 4435 `-._ `-._ `-./ _.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | http://redis.io `-._ `-._`-.__.-'_.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | `-._ `-._`-.__.-'_.-' _.-' `-._ `-.__.-' _.-' `-._ _.-' `-.__.-' 4435:M 25 Jan 11:40:48.817 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. 4435:M 25 Jan 11:40:48.817 # Server started, Redis version 3.0.6 4435:M 25 Jan 11:40:48.817 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect. 4435:M 25 Jan 11:40:48.817 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled. 4435:M 25 Jan 11:40:48.817 * DB loaded from disk: 0.000 seconds 4435:M 25 Jan 11:40:48.817 * The server is now ready to accept connections on port 6379
到此,單節(jié)點(diǎn)的 Redis server
已經(jīng)安裝完畢,以下進(jìn)入配置和安裝集群的過程。
創(chuàng)建集群中的6個(gè)節(jié)點(diǎn)
集群配置文件
集群相關(guān)的配置文件主要修改 redis.conf
中的一下幾個(gè)地方,因?yàn)槎疾渴鹪谝粋€(gè)服務(wù)器上,每個(gè)節(jié)點(diǎn)的端口不同。
[root@centos7-1 redis-3.0.6]$ vi redis.conf #修改以下地方 port 7000 cluster-enabled yes cluster-config-file nodes-7000.conf cluster-node-timeout 5000 appendonly yes
每個(gè)節(jié)點(diǎn)的配置文件
創(chuàng)建6個(gè)文件夾,分別表示一個(gè) redis 節(jié)點(diǎn),文件夾使用 redis 節(jié)點(diǎn)的端口號(hào)命名,文件里存放每個(gè)節(jié)點(diǎn)的配置文件。
[root@centos7-1 redis-3.0.6]# mkdir /usr/local/redis-cluster [root@centos7-1 redis-3.0.6]# cd /usr/local/redis-cluster [root@centos7-1 redis-cluster]# mkdir 7000 7001 7002 7003 7004 7005
拷貝 redis.conf
拷貝到6個(gè)文件夾中
[root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7000 [root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7001 [root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7002 [root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7003 [root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7004 [root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7005
并修改每個(gè)配置中的內(nèi)容為各自節(jié)點(diǎn)的端口,注意 port
和 cluster-config-file
的值必須唯一。
分別啟動(dòng)每個(gè)節(jié)點(diǎn)
[root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7000/redis.conf [root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7001/redis.conf [root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7002/redis.conf [root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7003/redis.conf [root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7004/redis.conf [root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7005/redis.conf
啟動(dòng)完成后查看進(jìn)程
[root@centos7-1 ~]# ps -ef | grep redis root 4704 2177 0 12:12 pts/0 00:00:07 redis-server *:7000 [cluster] root 4707 4599 0 12:12 pts/1 00:00:07 redis-server *:7001 [cluster] root 4710 4638 0 12:12 pts/2 00:00:07 redis-server *:7002 [cluster] root 4752 4717 0 12:12 pts/3 00:00:07 redis-server *:7003 [cluster] root 4788 4759 0 12:12 pts/4 00:00:07 redis-server *:7004 [cluster] root 4824 4795 0 12:13 pts/5 00:00:07 redis-server *:7005 [cluster] root 9018 8984 0 14:08 pts/6 00:00:00 grep --color=auto redis
建立 Redis 集群
上面的步驟分別創(chuàng)建了6個(gè)節(jié)點(diǎn),并已經(jīng)啟動(dòng),這里要把這6個(gè)節(jié)點(diǎn)加入到一個(gè)集群里面。redis 已經(jīng)為我們提供了集群操作的腳本 redis-trib.rb
, 操作起來很簡單, 繼續(xù)。
安裝 ruby
由于集群操作需要用到 ruby 腳本 redis-trib.rb
, 所以要安裝 ruby 和 rubygems
[root@centos7-1 ~]# yum -y install ruby rubygems [root@centos7-1 ~]# gem install redis --version 3.0.6 Fetching: redis-3.0.6.gem (100%) Successfully installed redis-3.0.6 Parsing documentation for redis-3.0.6 Installing ri documentation for redis-3.0.6 1 gem installed
redis-trib.rb
是一個(gè) ruby 腳本工具,用來建立和管理 redis 集群,因?yàn)槭褂帽容^頻繁,所以拷貝腳本 redis-trib.rb
到 /usr/local/bin/
[root@centos7-1 redis-3.0.6]$ cp src/redis-trib.rb /usr/local/bin/
創(chuàng)建集群
[root@centos7-1 ~]# redis-trib.rb create --replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 >>> Creating cluster >>> Performing hash slots allocation on 6 nodes... Using 3 masters: 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 Adding replica 127.0.0.1:7003 to 127.0.0.1:7000 Adding replica 127.0.0.1:7004 to 127.0.0.1:7001 Adding replica 127.0.0.1:7005 to 127.0.0.1:7002 M: d900d3667196121f95bdbd68ca2317926a6950bc 127.0.0.1:7000 slots:0-5460 (5461 slots) master M: b662853288cc89a3b78f70120d57c0a34f6a91d5 127.0.0.1:7001 slots:5461-10922 (5462 slots) master M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff 127.0.0.1:7002 slots:10923-16383 (5461 slots) master S: d18e50ac6aff2f612fac43da74a79288aa574c87 127.0.0.1:7003 replicates d900d3667196121f95bdbd68ca2317926a6950bc S: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead 127.0.0.1:7004 replicates b662853288cc89a3b78f70120d57c0a34f6a91d5 S: 89d792acda7f2c99c95b0d3947572647cf9edc67 127.0.0.1:7005 replicates 6dc5ee101c2432ec4c1d934d54a6a3565116bbff Can I set the above configuration? (type 'yes' to accept): 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 127.0.0.1:7000) M: d900d3667196121f95bdbd68ca2317926a6950bc 127.0.0.1:7000 slots:0-5460 (5461 slots) master M: b662853288cc89a3b78f70120d57c0a34f6a91d5 127.0.0.1:7001 slots:5461-10922 (5462 slots) master M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff 127.0.0.1:7002 slots:10923-16383 (5461 slots) master M: d18e50ac6aff2f612fac43da74a79288aa574c87 127.0.0.1:7003 slots: (0 slots) master replicates d900d3667196121f95bdbd68ca2317926a6950bc M: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead 127.0.0.1:7004 slots: (0 slots) master replicates b662853288cc89a3b78f70120d57c0a34f6a91d5 M: 89d792acda7f2c99c95b0d3947572647cf9edc67 127.0.0.1:7005 slots: (0 slots) master replicates 6dc5ee101c2432ec4c1d934d54a6a3565116bbff [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
以上 create
命令創(chuàng)建了集群,選項(xiàng) –replicas 1
表示每個(gè) Master
都需要一個(gè) Slave
。所以結(jié)果是集群中創(chuàng)建了3個(gè) Master
節(jié)點(diǎn) 和 3個(gè) Slave
節(jié)點(diǎn)。
上面信息中 M 表示 Master
節(jié)點(diǎn), S 表示 Slave
節(jié)點(diǎn)。
由此可以看出三組 Master
和 Slave
關(guān)系如下:
M: d900d3667196121f95bdbd68ca2317926a6950bc -> S: d18e50ac6aff2f612fac43da74a79288aa574c87 M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff -> S: 89d792acda7f2c99c95b0d3947572647cf9edc67 M: b662853288cc89a3b78f70120d57c0a34f6a91d5 -> S: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead
檢測集群的狀態(tài)
[root@centos7-1 ~]# redis-trib.rb check 127.0.0.1:7000 >>> Performing Cluster Check (using node 127.0.0.1:7000) M: d900d3667196121f95bdbd68ca2317926a6950bc 127.0.0.1:7000 slots:0-5460 (5461 slots) master 1 additional replica(s) M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff 127.0.0.1:7002 slots:10923-16383 (5461 slots) master 1 additional replica(s) S: 89d792acda7f2c99c95b0d3947572647cf9edc67 127.0.0.1:7005 slots: (0 slots) slave replicates 6dc5ee101c2432ec4c1d934d54a6a3565116bbff S: d18e50ac6aff2f612fac43da74a79288aa574c87 127.0.0.1:7003 slots: (0 slots) slave replicates d900d3667196121f95bdbd68ca2317926a6950bc S: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead 127.0.0.1:7004 slots: (0 slots) slave replicates b662853288cc89a3b78f70120d57c0a34f6a91d5 M: b662853288cc89a3b78f70120d57c0a34f6a91d5 127.0.0.1:7001 slots:5461-10922 (5462 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.
測試集群
利用 redis-cli -c -p
端口號(hào) 連接集群
[root@centos7-1 ~]# redis-cli -c -p 7000 127.0.0.1:7000> get hello (nil) 127.0.0.1:7000> set hello "hello world" OK 127.0.0.1:7000> get hello "hello world" 127.0.0.1:7000> get name -> Redirected to slot [5798] located at 127.0.0.1:7001 (nil) 127.0.0.1:7001> set name "redis server" OK 127.0.0.1:7001> get name "redis server"
總結(jié)
上就是關(guān)于在CentOS 7系統(tǒng)下安裝redis 3.0.6并配置集群的全部內(nèi)容了,希望本文的內(nèi)容對大家的學(xué)習(xí)或者工作能帶來一定的幫助,如果有疑問大家可以留言交流。
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