redis¶
redis下载地址： http://download.redis.io/releases/
redis 相关文档： https://blog.csdn.net/shenjianxz/article/details/59775212
本次安装用了两台服务器， 一台主机名为redis1.alv.pub ip是192.168.3.21 ，另一台是redis2.alv.pub，ip是192.168.3.22
两台服务器ip都可以通过短主机名redis1 redis2解析到。
redis cluster 安装¶
cd /usr/local/src
wget http://download.redis.io/releases/redis-5.0.0.tar.gz
tar -zxvf redis-5.0.0.tar.gz
编译安装¶
cd redis-5.0.0/
yum install gcc -y
make MALLOC=libc && make install
创建redis节点¶
本次测试我们在一台服务器上进行，这台服务器主机名是 redis1.alv.pub ip是192.168.3.21
cd /usr/local/
mkdir redis_cluster #创建集群目录
cd redis_cluster
mkdir 7001 #
#创建7000节点为例，拷贝到7000目录
cp /usr/local/src/redis-5.0.0/redis.conf ./7001/
对7001目录的配置文件修改对应的配置
vim /usr/local/redis_cluster/7001/redis.conf
daemonize yes //redis后台运行
pidfile /var/run/redis_7001.pid //pidfile文件对应7001,7001,7002
port 7001 //端口7001
cluster-enabled yes //开启集群 把注释#去掉
cluster-config-file nodes_7001.conf //集群的配置 配置文件首次启动自动生成 7001,7002,7003 ...
cluster-node-timeout 5000 //请求超时 设置5秒够了
appendonly yes //aof日志开启 有需要就开启，它会每次写操作都记录一条日志
bind 0.0.0.0 #监听对应的地址
然后将7001目录，拷贝为7002 和7003，并拷贝到另一台服务器redis2上去，在redis2上目录名为7004 7005 7006
for i in {2..6};do cp -r /usr/local/redis_cluster/7001/ /usr/local/redis_cluster/700$i;done
然后修改配置
for i in {2..6};do sed -i "s/7001/700$i/" /usr/local/redis_cluster/700$i/redis.conf;done
启动各节点¶
for i in {1..6};do redis-server /usr/local/redis_cluster/700$i/redis.conf;done
查看服务¶
ps -ef | grep redis #查看是否启动成功
netstat -tnlp | grep redis #可以看到redis监听端口
创建集群¶
本文安装的是5.0 版本，5.0版本已经不再redis-trib.rb创建集群，所以不用安装ruby啥的了，当时redis-trib.rb的功能，现在已经集成到了redis-cli中，并且可以在有认证的情况执行了，可以通过./redis-cli –cluster help查看使用方式。
环境¶
redis1服务器上 上
[root@redis1 redis_cluster]# netstat -anplut|grep redis
tcp 0 0 0.0.0.0:17003 0.0.0.0:* LISTEN 2612/redis-server 0
tcp 0 0 0.0.0.0:17004 0.0.0.0:* LISTEN 2676/redis-server 0
tcp 0 0 0.0.0.0:17005 0.0.0.0:* LISTEN 2678/redis-server 0
tcp 0 0 0.0.0.0:17006 0.0.0.0:* LISTEN 2618/redis-server 0
tcp 0 0 0.0.0.0:7001 0.0.0.0:* LISTEN 2605/redis-server 0
tcp 0 0 0.0.0.0:7002 0.0.0.0:* LISTEN 2610/redis-server 0
tcp 0 0 0.0.0.0:7003 0.0.0.0:* LISTEN 2612/redis-server 0
tcp 0 0 0.0.0.0:7004 0.0.0.0:* LISTEN 2676/redis-server 0
tcp 0 0 0.0.0.0:7005 0.0.0.0:* LISTEN 2678/redis-server 0
tcp 0 0 0.0.0.0:7006 0.0.0.0:* LISTEN 2618/redis-server 0
tcp 0 0 0.0.0.0:17001 0.0.0.0:* LISTEN 2605/redis-server 0
tcp 0 0 0.0.0.0:17002 0.0.0.0:* LISTEN 2610/redis-server 0
[root@redis1 redis_cluster]# redis-cli --cluster create 192.168.3.21:7001 192.168.3.21:7002 192.168.3.21:7003 192.168.3.21:7004 192.168.3.21:7005 192.168.3.21:7006 --cluster-replicas 1
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 192.168.3.21:7004 to 192.168.3.21:7001
Adding replica 192.168.3.21:7005 to 192.168.3.21:7002
Adding replica 192.168.3.21:7006 to 192.168.3.21:7003
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 9c548863676ffd91e975cf681fdc128236315d55 192.168.3.21:7001
slots:[0-5460] (5461 slots) master
M: 781bb13a4fd7e2ad90ce67ab1939fc3150c69418 192.168.3.21:7002
slots:[5461-10922] (5462 slots) master
M: 0edf2290c0a17bd0febc9fb3f48463597e1d5934 192.168.3.21:7003
slots:[10923-16383] (5461 slots) master
S: 93deb1cfc75eb70fda5b0ac3ee71808c72594212 192.168.3.21:7004
replicates 9c548863676ffd91e975cf681fdc128236315d55
S: 088f1303739e6fd7e00e2a91cf4a5a4cf8ab715a 192.168.3.21:7005
replicates 781bb13a4fd7e2ad90ce67ab1939fc3150c69418
S: 7b919a994dbb400a8ebb0531347193e84f6c10e3 192.168.3.21:7006
replicates 0edf2290c0a17bd0febc9fb3f48463597e1d5934
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 192.168.3.21:7001)
M: 9c548863676ffd91e975cf681fdc128236315d55 192.168.3.21:7001
slots:[0-5460] (5461 slots) master
1 additional replica(s)
S: 7b919a994dbb400a8ebb0531347193e84f6c10e3 192.168.3.21:7006
slots: (0 slots) slave
replicates 0edf2290c0a17bd0febc9fb3f48463597e1d5934
M: 0edf2290c0a17bd0febc9fb3f48463597e1d5934 192.168.3.21:7003
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
M: 781bb13a4fd7e2ad90ce67ab1939fc3150c69418 192.168.3.21:7002
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
S: 93deb1cfc75eb70fda5b0ac3ee71808c72594212 192.168.3.21:7004
slots: (0 slots) slave
replicates 9c548863676ffd91e975cf681fdc128236315d55
S: 088f1303739e6fd7e00e2a91cf4a5a4cf8ab715a 192.168.3.21:7005
slots: (0 slots) slave
replicates 781bb13a4fd7e2ad90ce67ab1939fc3150c69418
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
[root@redis1 redis_cluster]#
查看集群信息¶
三个master 三个slave。
[root@redis1 redis_cluster]# redis-cli --cluster check redis1:7001
redis1:7001 (9c548863...) -> 0 keys | 5461 slots | 1 slaves.
192.168.3.21:7003 (0edf2290...) -> 0 keys | 5461 slots | 1 slaves.
192.168.3.21:7002 (781bb13a...) -> 0 keys | 5462 slots | 1 slaves.
[OK] 0 keys in 3 masters.
0.00 keys per slot on average.
>>> Performing Cluster Check (using node redis1:7001)
M: 9c548863676ffd91e975cf681fdc128236315d55 redis1:7001
slots:[0-5460] (5461 slots) master
1 additional replica(s)
S: 7b919a994dbb400a8ebb0531347193e84f6c10e3 192.168.3.21:7006
slots: (0 slots) slave
replicates 0edf2290c0a17bd0febc9fb3f48463597e1d5934
M: 0edf2290c0a17bd0febc9fb3f48463597e1d5934 192.168.3.21:7003
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
M: 781bb13a4fd7e2ad90ce67ab1939fc3150c69418 192.168.3.21:7002
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
S: 93deb1cfc75eb70fda5b0ac3ee71808c72594212 192.168.3.21:7004
slots: (0 slots) slave
replicates 9c548863676ffd91e975cf681fdc128236315d55
S: 088f1303739e6fd7e00e2a91cf4a5a4cf8ab715a 192.168.3.21:7005
slots: (0 slots) slave
replicates 781bb13a4fd7e2ad90ce67ab1939fc3150c69418
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
查看集群key、slot、slave分布信息#
[root@redis1 redis_cluster]# redis-cli --cluster info 192.168.3.21:7001
192.168.3.21:7001 (9c548863...) -> 0 keys | 5461 slots | 1 slaves.
192.168.3.21:7003 (0edf2290...) -> 0 keys | 5461 slots | 1 slaves.
192.168.3.21:7002 (781bb13a...) -> 0 keys | 5462 slots | 1 slaves.