redis从3.0版本开始支持集群,2.X版本主支持sentinel主从模式;所以要搭建集群务必下载3.0以上版本,本教程以3.2.2版本为例。
redis集群最少要有3个主节点,最典型的是3主3从组成集群;本教程以在同一台主机(192.168.220.128)搭建3个主节点(master)的集群为例。
1.下载
下载页面:https://redis.io/download
当前最新版本下载:http://download.redis.io/releases/redis-4.0.1.tar.gz
历史版本下载:http://download.redis.io/releases/
2.安装
先创建基本的目录结构
- mkdir redis
- mkdir redis/adm
- mkdir redis/bin-3.2.2
- ln -s bin-3.2.2 redis/bin
- mkdir redis/data
- mkdir redis/conf
- mkdir redis/logs
- mkdir redis/tmp
解压编译redis
- tar -zxf redis-3.2.2.tar.gz
- cd redis-3.2.2
- make
将redis二进制文件和ruby脚本移动bin目录,将配置文件移到conf目录
- cd src
- ll |grep x
- cp mkreleasehdr.sh redis-benchmark redis-check-aof redis-check-rdb redis-cli redis-sentinel redis-server redis-trib.rb ../../redis/bin
- cd ..
- cp runtest runtest-cluster runtest-sentinel ../redis/bin
- cp redis.conf sentinel.conf ../redis/conf/
3.配置和启动redis
创建各端口进程的data目录
- cd redis/data
- mkdir 7011
- mkdir 7012
- mkdir 7013
- mkdir 7014
- mkdir 7015
- mkdir 7016
创建各端口进程的配置文件,其中portNum和bind的IP根据自己情况修改
- cd ../conf
- for portNum in 7011 7012 7013 7014 7015 7016
- do
- cat > redis-$portNum.conf <<EOF
- daemonize yes
- pidfile /usr/myapp/redis/tmp/redis-$portNum.pid
- dir /usr/myapp/redis/data/$portNum/
-
- loglevel notice
- logfile /usr/myapp/redis/logs/redis-$portNum.log
- maxclients 10000
-
- bind 192.168.220.128
- port $portNum
-
- protected-mode yes
- #requirepass yourpasswd
-
- cluster-enabled yes
- cluster-config-file nodes-$portNum.conf
- cluster-node-timeout 5000
- cluster-require-full-coverage no
-
- appendonly no
- appendfsync everysec
- auto-aof-rewrite-percentage 200
- auto-aof-rewrite-min-size 256mb
-
- save ""
-
- repl-diskless-sync no
- repl-diskless-sync-delay 5
- EOF
- done
创建集群时上边的bind最好只绑定一个本机网卡的IP地址,127.0.0.1也不要绑,不然在后边使用redis-trib创建集群时会一直停在等待节点加入状态。(不绑127.0.0.1的问题是redis-cli需要用-h指定IP才能登录)
然后启动各server进程
- cd ../bin
- ./redis-server ../conf/redis-7011.conf
- ./redis-server ../conf/redis-7012.conf
- ./redis-server ../conf/redis-7013.conf
- ./redis-server ../conf/redis-7014.conf
- ./redis-server ../conf/redis-7015.conf
- ./redis-server ../conf/redis-7016.conf
4.安装ruby
由于redis官方提供的集群组建脚本是ruby写的,所以我们需要安装ruby
- yum -y install ruby ruby-devel rubygems rpm-build
- gem install redis
对于内网环境可能或是不能连接外网或没有源,需要先在别的机器上离线下载然后上传上去离线安装
- yum install --downloaddir=. --downloadonly ruby #下载ruby及其依赖到当前目录,如果还有其他包没下载可模仿下载
- yum install --downloaddir=. --downloadonly rubygems #下载gem及其依赖到当前目录
- wget https://rubygems.global.ssl.fastly.net/gems/redis-3.2.2.gem
- yum localinstall ruby -y #进入上传的ruby存放的目录执行
- yum localinstall rubygems -y #进入上传的rubygems目录执行
- gem install -l ./redis-3.2.2.gem
yum localinstall有时装不上改用rpm逐个包安装即可;ruby依次安装compat-readline5--ruby-libs--ruby;gem依次安装ruby-irb--ruby-rdoc--rubygems
5.创建集群
- cd ../bin
- ./redis-trib.rb create --replicas 1 192.168.220.128:7011 192.168.220.128:7012 192.168.220.128:7013 192.168.220.128:7014 192.168.220.128:7015 192.168.220.128:7016
在提示Can I set the above configuration? (type 'yes' to accept):时输入yes接受即可(redis-trib有时会报错权限不足,以root执行即可)
6.查看集群情况
- ./redis-cli -h 192.168.220.128 -p 7011 -c cluster nodes
-c是登录集群使可以自动跳转;如果要确保集群可用,可登录set/get一下