redis在3.0之后开始支持集群，实际生产中一般也是会部署集群了
redis官方推出了一个叫redis-trib.rb的redis集群工具（存放在源码文件的src目录下）；由于redis-trib.rb是基于ruby编写的，所以系统环境需要安装ruby环境
1 [root@Node1 redis-3.2.8]# cd src/ 2 [root@Node1 src]# ls 3 adlist.c aof.o config.o dump.rdb latency.c multi.c quicklist.h redis-check-aof.o replication.o server.o sparkline.o util.c 4 adlist.h asciilogo.h crc16.c endianconv.c latency.h multi.o quicklist.o redis-check-rdb rio.c setproctitle.c syncio.c util.h 5 adlist.o bio.c crc16.o endianconv.h latency.o networking.c rand.c redis-check-rdb.c rio.h setproctitle.o syncio.o util.o 6 ae.c bio.h crc64.c endianconv.o lzf_c.c networking.o rand.h redis-check-rdb.o rio.o sha1.c testhelp.h valgrind.sup 7 ae_epoll.c bio.o crc64.h fmacros.h lzf_c.o notify.c rand.o redis-cli scripting.c sha1.h t_hash.c version.h 8 ae_evport.c bitops.c crc64.o geo.c lzf_d.c notify.o rdb.c redis-cli.c scripting.o sha1.o t_hash.o ziplist.c 9 ae.h bitops.o db.c geo.h lzf_d.o object.c rdb.h redis-cli.o sdsalloc.h slowlog.c t_list.c ziplist.h 10 ae_kqueue.c blocked.c db.o geo.o lzf.h object.o rdb.o redis-sentinel sds.c slowlog.h t_list.o ziplist.o 11 ae.o blocked.o debug.c help.h lzfP.h pqsort.c redisassert.h redis-server sds.h slowlog.o t_set.c zipmap.c 12 ae_select.c cluster.c debugmacro.h hyperloglog.c Makefile pqsort.h redis-benchmark redis-trib.rb sds.o solarisfixes.h t_set.o zipmap.h 13 anet.c cluster.h debug.o hyperloglog.o Makefile.dep pqsort.o redis-benchmark.c release.c sentinel.c sort.c t_string.c zipmap.o 14 anet.h cluster.o dict.c intset.c memtest.c pubsub.c redis-benchmark.o release.h sentinel.o sort.o t_string.o zmalloc.c 15 anet.o config.c dict.h intset.h memtest.o pubsub.o redis-check-aof release.o server.c sparkline.c t_zset.c zmalloc.h 16 aof.c config.h dict.o intset.o mkreleasehdr.sh quicklist.c redis-check-aof.c replication.c server.h sparkline.h t_zset.o zmalloc.o
还是以redis-3.2.8为例来部署集群
环境准备：
1 [root@Node1 src]# yum -y install ruby rubygems 2 [root@Node1 src]# wget https://rubygems.global.ssl.fastly.net/gems/redis-3.2.1.gem 3 [root@Node1 src]# gem install -l ./redis-3.2.1.gem
redis-3.2.1.gem是redis-trib.rb的运行需要的ruby包，这个包和redis版本不是非得匹配，只要支持就行。
受限于机器数量，我搭建一个伪集群，在一套系统上搭建三主三从
1 [root@Node1 app]# mkdir -p /app/redis-cluster/{7001,7002,7003,7004,7005,7006} #创建目录 2 ## 拷贝文件 3 [root@Node1 src]# cp redis-cli redis-server /app/redis-cluster/{7001,7002,7003,7004,7005,7006} 4 [root@Node1 redis-3.2.8]# cp redis.conf /app/redis-cluster/{7001,7002,7003,7004,7005,7006} 5 [root@Node1 redis-3.2.8]# cd ../redis-cluster/7001/ 6 [root@Node1 7001]# vim redis.conf #编辑配置文件 7 port 7001 8 daemonize yes 9 pidfile /app/redis-cluster/7001/redis_7001.pid 10 appendonly yes 11 cluster-enabled yes 12 cluster-config-file nodes-7001.conf 13 cluster-node-timeout 15000
将编辑好的redis.conf文件拷贝到另外几个目录下去，然后修改其中的端口号即可
1 [root@Node1 redis-3.2.8]# cp redis.conf ../redis-cluster/7002/ 2 [root@Node1 redis-3.2.8]# cp redis.conf ../redis-cluster/7003/ 3 [root@Node1 redis-3.2.8]# cp redis.conf ../redis-cluster/7004/ 4 [root@Node1 redis-3.2.8]# cp redis.conf ../redis-cluster/7005/ 5 [root@Node1 redis-3.2.8]# cp redis.conf ../redis-cluster/7006/
修改完成后就可以启动这六个redis了
1 [root@Node1 redis-cluster]# ./redis-server 7001/redis.conf 2 [root@Node1 redis-cluster]# ./redis-server 7002/redis.conf 3 [root@Node1 redis-cluster]# ./redis-server 7003/redis.conf 4 [root@Node1 redis-cluster]# ./redis-server 7004/redis.conf 5 [root@Node1 redis-cluster]# ./redis-server 7005/redis.conf 6 [root@Node1 redis-cluster]# ./redis-server 7006/redis.conf 7 [root@Node1 redis-cluster]# ps -ef|grep redis 8 root 5205 1 0 23:48 ? 00:00:00 ./redis-server 172.16.9.10:7001 [cluster] 9 root 5209 1 0 23:48 ? 00:00:00 ./redis-server 172.16.9.10:7002 [cluster] 10 root 5213 1 0 23:49 ? 00:00:00 ./redis-server 172.16.9.10:7003 [cluster] 11 root 5217 1 0 23:49 ? 00:00:00 ./redis-server 172.16.9.10:7004 [cluster] 12 root 5221 1 0 23:49 ? 00:00:00 ./redis-server 172.16.9.10:7005 [cluster] 13 root 5225 1 0 23:49 ? 00:00:00 ./redis-server 172.16.9.10:7006 [cluster] 14 root 5230 1987 0 23:49 pts/0 00:00:00 grep --color=auto redis
在没有ruby环境的话，安装到此还是没问题的，但是现在的redis集群是不能正常使用的，因此后续必须要有ruby环境，我前面已经安装过了，所以先我就直接创建集群
1 [root@Node1 redis-cluster]# ./redis-trib.rb create --replicas 1 172.16.9.10:7001 172.16.9.10:7002 172.16.9.10:7003 172.16.9.10:7004 172.16.9.10:7005 172.16.9.10:7006 2 >>> Creating cluster 3 >>> Performing hash slots allocation on 6 nodes... 4 Using 3 masters: 5 172.16.9.10:7001 6 172.16.9.10:7002 7 172.16.9.10:7003 8 Adding replica 172.16.9.10:7004 to 172.16.9.10:7001 9 Adding replica 172.16.9.10:7005 to 172.16.9.10:7002 10 Adding replica 172.16.9.10:7006 to 172.16.9.10:7003 11 M: 70685e4e7bc6e0f4f80536e47a4fba653f3a5a0a 172.16.9.10:7001 12 slots:0-5460 (5461 slots) master 13 M: c718f6a2593c9f9383ede404f5879be365b48b05 172.16.9.10:7002 14 slots:5461-10922 (5462 slots) master 15 M: 6d5d66f350a5e85b0daf559b18a2f27ac50b96a5 172.16.9.10:7003 16 slots:10923-16383 (5461 slots) master 17 S: 03ea78465e980d40fe6eef10fb767bc4a25f00d7 172.16.9.10:7004 18 replicates 70685e4e7bc6e0f4f80536e47a4fba653f3a5a0a 19 S: f97391d5cfa351229963a91fd7800182c4a39961 172.16.9.10:7005 20 replicates c718f6a2593c9f9383ede404f5879be365b48b05 21 S: a8750aec28fad2abdefbe943c507547c690f2534 172.16.9.10:7006 22 replicates 6d5d66f350a5e85b0daf559b18a2f27ac50b96a5 23 Can I set the above configuration? (type 'yes' to accept): yes 24 >>> Nodes configuration updated 25 >>> Assign a different config epoch to each node 26 >>> Sending CLUSTER MEET messages to join the cluster 27 Waiting for the cluster to join...... 28 >>> Performing Cluster Check (using node 172.16.9.10:7001) 29 M: 70685e4e7bc6e0f4f80536e47a4fba653f3a5a0a 172.16.9.10:7001 30 slots:0-5460 (5461 slots) master 31 1 additional replica(s) 32 M: c718f6a2593c9f9383ede404f5879be365b48b05 172.16.9.10:7002 33 slots:5461-10922 (5462 slots) master 34 1 additional replica(s) 35 S: 03ea78465e980d40fe6eef10fb767bc4a25f00d7 172.16.9.10:7004 36 slots: (0 slots) slave 37 replicates 70685e4e7bc6e0f4f80536e47a4fba653f3a5a0a 38 S: f97391d5cfa351229963a91fd7800182c4a39961 172.16.9.10:7005 39 slots: (0 slots) slave 40 replicates c718f6a2593c9f9383ede404f5879be365b48b05 41 M: 6d5d66f350a5e85b0daf559b18a2f27ac50b96a5 172.16.9.10:7003 42 slots:10923-16383 (5461 slots) master 43 1 additional replica(s) 44 S: a8750aec28fad2abdefbe943c507547c690f2534 172.16.9.10:7006 45 slots: (0 slots) slave 46 replicates 6d5d66f350a5e85b0daf559b18a2f27ac50b96a5 47 [OK] All nodes agree about slots configuration. 48 >>> Check for open slots... 49 >>> Check slots coverage... 50 [OK] All 16384 slots covered.
集群创建完了，测试一下
1 [root@Node1 redis-cluster]# ./redis-cli -c -h 172.16.9.10 -p 7006 #注意必须要有-c 2 172.16.9.10:7006> keys * 3 (empty list or set) 4 172.16.9.10:7006> set name abc 5 -> Redirected to slot [5798] located at 172.16.9.10:7002 6 OK 7 172.16.9.10:7002>