因爲公司用的是redis4，所以這裏記錄4.0.14（redis4的最後一個版本）。
1.Redis是c開發的,因此安裝redis需要c語言的編譯環境,即需要安裝gcc。
[root@centos125 ~]# gcc -v
-bash: gcc: command not found
說明gcc沒有安裝，安裝命令：
yum -y install gcc gcc-c++
最後看到"Complete!"，說明安裝完成，再次使用”gcc -v“可看到結果：
gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC)
2.下載redis源碼。
[root@centos125 ~]# wget http://download.redis.io/releases/redis-4.0.14.tar.gz
-bash: wget: command not found
說明沒有安裝wget，安裝命令：
[root@centos125 ~]# yum -y install wget
看到”Complete!“後，再次執行”wget http://download.redis.io/releases/redis-4.0.14.tar.gz“命令。
或者本地下載後通過winscp傳輸到linux服務器，這樣就不需要安裝wget，本地下載地址：http://download.redis.io/releases/redis-4.0.14.tar.gz。
3.解壓。
[root@centos125 ~]# tar zxvf redis-4.0.14.tar.gz
[root@centos125 ~]# cd redis-4.0.14
[root@centos125 redis-4.0.14]# ls
00-RELEASENOTES BUGS CONTRIBUTING COPYING deps INSTALL Makefile MANIFESTO README.md redis.conf runtest runtest-cluster runtest-sentinel sentinel.conf src tests utils
3.1 make命令使用Makefile編譯src目錄下的源碼：
[root@centos125 redis-4.0.14]# make
若最後有報錯：
compilation terminated.
make[1]: *** [adlist.o] Error 1
make[1]: Leaving directory `/usr/local/tmp/redis-4.0.10/src'
make: *** [install] Error 2
原因是 jemalloc 重載了Linux下的 ANSIC 的 malloc 和 free 函數。解決辦法：
[root@centos125 redis-4.0.14]# make MALLOC=libc
最後看到：
Hint: It's a good idea to run 'make test' ;)
make[1]: Leaving directory `/root/redis-4.0.14/src'
說明源碼編譯完成。
3.2 將編譯後的redis源碼安裝到指定目錄：
[root@centos125 redis-4.0.14]# make install PREFIX=/usr/local/redis-cluster/redis01
查看安裝結果：
[root@centos125 redis-4.0.14]# cd /usr/local/redis-cluster/redis01/
[root@centos125 redis01]# ls
bin
[root@centos125 redis01]# cd bin
[root@centos125 bin]# ls
redis-benchmark redis-check-aof redis-check-rdb redis-cli redis-sentinel redis-server
4. 前端啓動。
[root@centos125 bin]# ./redis-server
前端啓動的話,如果客戶端關閉,redis服務也會停掉,所以需要改成後臺啓動redis。
5. 後臺啓動。
注意：因爲剛纔使用了前端啓動，所以需要先刪除剛纔啓動生成的配置文件，否則，後面創建集羣可能會出現問題（我第一次創建集羣的時候失敗了，懷疑是這個原因）。
[root@centos125 bin]# rm -f dump.rdb
5.1 將redis解壓文件夾下的redis.conf複製到bin目錄下：
[root@centos125 bin]# cp /root/redis-4.0.14/redis.conf /usr/local/redis-cluster/redis01/bin/
[root@centos125 bin]# ls
redis-benchmark redis-check-aof redis-check-rdb redis-cli redis.conf redis-sentinel redis-server
5.2 修改配置文件：
[root@centos125 bin]# vi redis.conf
需要修改的地方有3處：
5.2.1 將daemonize no --> daemonize yes,這樣便將啓動方式修改爲後臺啓動了。（/dae然後回車，vi下的搜索模式）
5.2.2 將cluster-enabled yes 的註釋放開，集羣模式支持開啓。
5.2.3 默認端口號port 6379 --> port 7001。
5.3 啓動redis-server：
[root@centos125 bin]# ./redis-server redis.conf
5018:C 06 Jun 16:32:39.062 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
5018:C 06 Jun 16:32:39.062 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=5018, just started
5018:C 06 Jun 16:32:39.062 # Configuration loaded
6. 再啓動5個redis-server。
6.1 copy5份redis01文件夾：
[root@centos125 redis-cluster]# cp -r redis01/ redis02
[root@centos125 redis-cluster]# cp -r redis01/ redis03
[root@centos125 redis-cluster]# cp -r redis01/ redis04
[root@centos125 redis-cluster]# cp -r redis01/ redis05
[root@centos125 redis-cluster]# cp -r redis01/ redis06
[root@centos125 redis-cluster]# ls
redis01 redis02 redis03 redis04 redis05 redis06
[root@centos125 redis-cluster]# ls redis02/bin/
dump.rdb nodes.conf redis-benchmark redis-check-aof redis-check-rdb redis-cli redis.conf redis-sentinel redis-server
6.2 修改另外5份文件夾的redis.conf的port 7001：
[root@centos125 redis-cluster]# vi redis02/bin/redis.conf
[root@centos125 redis-cluster]# vi redis03/bin/redis.conf
[root@centos125 redis-cluster]# vi redis04/bin/redis.conf
[root@centos125 redis-cluster]# vi redis05/bin/redis.conf
[root@centos125 redis-cluster]# vi redis06/bin/redis.conf
分別修改爲：port 7002，port 7003，port 7004，port 7005，port 7006。
6.3 分別啓動新的5個redis-server：
[root@centos125 bin]# cd ../../redis02/bin/
[root@centos125 bin]# ./redis-server redis.conf
935266:C 10 Jun 16:19:57.091 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
935266:C 10 Jun 16:19:57.091 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=935266, just started
935266:C 10 Jun 16:19:57.091 # Configuration loaded
[root@centos125 bin]# cd ../../redis03/bin/
[root@centos125 bin]# ./redis-server redis.conf
936823:C 10 Jun 16:20:06.023 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
936823:C 10 Jun 16:20:06.023 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=936823, just started
936823:C 10 Jun 16:20:06.023 # Configuration loaded
[root@centos125 bin]# cd ../../redis04/bin/
[root@centos125 bin]# ./redis-server redis.conf
939396:C 10 Jun 16:20:20.822 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
939396:C 10 Jun 16:20:20.822 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=939396, just started
939396:C 10 Jun 16:20:20.822 # Configuration loaded
[root@centos125 bin]# cd ../../redis05/bin/
[root@centos125 bin]# ./redis-server redis.conf
941763:C 10 Jun 16:20:34.203 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
941763:C 10 Jun 16:20:34.203 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=941763, just started
941763:C 10 Jun 16:20:34.203 # Configuration loaded
[root@centos125 bin]# cd ../../redis06/bin/
[root@centos125 bin]# ./redis-server redis.conf
944393:C 10 Jun 16:20:49.809 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
944393:C 10 Jun 16:20:49.809 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=944393, just started
944393:C 10 Jun 16:20:49.809 # Configuration loaded
最終6個redis-server啓動成功。
[root@centos125 bin]# ps aux | grep redis
root 930247 0.1 0.0 147364 2744 ? Ssl 16:19 0:00 ./redis-server 127.0.0.1:7001 [cluster]
root 935276 0.1 0.0 147364 2736 ? Ssl 16:19 0:00 ./redis-server 127.0.0.1:7002 [cluster]
root 936827 0.1 0.0 147364 2752 ? Ssl 16:20 0:00 ./redis-server 127.0.0.1:7003 [cluster]
root 939465 0.1 0.0 147364 2752 ? Ssl 16:20 0:00 ./redis-server 127.0.0.1:7004 [cluster]
root 941766 0.0 0.0 147364 2740 ? Ssl 16:20 0:00 ./redis-server 127.0.0.1:7005 [cluster]
root 944422 0.0 0.0 147364 2748 ? Ssl 16:20 0:00 ./redis-server 127.0.0.1:7006 [cluster]
root 945477 0.0 0.0 112708 980 pts/0 S+ 16:20 0:00 grep --color=auto redis
至此，啓動6個redis節點結束。
7. 創建redis集羣。
7.1 要搭建集羣的話，需要使用一個工具（腳本文件redis-trib.rb），這個工具在redis解壓文件的src下。因爲這個工具是一個ruby腳本文件，所以這個工具的運行需要ruby的運行環境：
[root@centos125 redis-4.0.14]# yum -y install ruby rubygems
再安裝redis的gem包（若失敗可換成本地下載好後傳到linux服務器，要注意redis.gem包版本需要和redis的版本一致）：
[root@centos125 redis-4.0.14]# gem install redis
Fetching: redis-4.1.2.gem (100%)
ERROR: Error installing redis:
redis requires Ruby version >= 2.3.0.
[root@centos125 redis-4.0.14]# ruby -v
ruby 2.0.0p648 (2015-12-16) [x86_64-linux]
報錯解決的參考：CenterOS7——報錯redis requires Ruby version -= 2.2.2
（curl -L get.rvm.io | bash -s stable 失敗時，執行額外的命令：
curl -sSL https://rvm.io/mpapis.asc | gpg2 --import -
curl -sSL https://rvm.io/pkuczynski.asc | gpg2 --import -）
7.2 搭建集羣：
7.2.1 將redis的集羣腳本redis-trib.rb copy到redis-cluster下：
[root@centos125 redis-cluster]# cp /root/redis-4.0.14/src/redis-trib.rb .
7.2.2 執行創建集羣命令：
[root@centos125 redis-cluster]# ./redis-trib.rb create --replicas 1 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006
命令日誌：
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
127.0.0.1:7001
127.0.0.1:7002
127.0.0.1:7003
Adding replica 127.0.0.1:7005 to 127.0.0.1:7001
Adding replica 127.0.0.1:7006 to 127.0.0.1:7002
Adding replica 127.0.0.1:7004 to 127.0.0.1:7003
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 06ee0333aeac6b0f4cf3161c0e9750c72d8a9def 127.0.0.1:7001
slots:0-5460 (5461 slots) master
M: 20d3e411c9729ab5501668a99098138edbcaf82c 127.0.0.1:7002
slots:5461-10922 (5462 slots) master
M: 0aa8014a9f0cb90f9bf9a77e29df462e1acc447a 127.0.0.1:7003
slots:10923-16383 (5461 slots) master
S: af9ec87ee2f6bec0ce791b43a13d1784d9773017 127.0.0.1:7004
replicates 0aa8014a9f0cb90f9bf9a77e29df462e1acc447a
S: aee308c2d15feda5550d5ceba13d1305d3edb941 127.0.0.1:7005
replicates 06ee0333aeac6b0f4cf3161c0e9750c72d8a9def
S: bec0dc2ae04ea8d2120e66f72c67134236b0c5dc 127.0.0.1:7006
replicates 20d3e411c9729ab5501668a99098138edbcaf82c
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 127.0.0.1:7001)
M: 06ee0333aeac6b0f4cf3161c0e9750c72d8a9def 127.0.0.1:7001
slots:0-5460 (5461 slots) master
1 additional replica(s)
M: 20d3e411c9729ab5501668a99098138edbcaf82c 127.0.0.1:7002
slots:5461-10922 (5462 slots) master
1 additional replica(s)
M: 0aa8014a9f0cb90f9bf9a77e29df462e1acc447a 127.0.0.1:7003
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: af9ec87ee2f6bec0ce791b43a13d1784d9773017 127.0.0.1:7004
slots: (0 slots) slave
replicates 0aa8014a9f0cb90f9bf9a77e29df462e1acc447a
S: bec0dc2ae04ea8d2120e66f72c67134236b0c5dc 127.0.0.1:7006
slots: (0 slots) slave
replicates 20d3e411c9729ab5501668a99098138edbcaf82c
S: aee308c2d15feda5550d5ceba13d1305d3edb941 127.0.0.1:7005
slots: (0 slots) slave
replicates 06ee0333aeac6b0f4cf3161c0e9750c72d8a9def
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
說明創建集羣成功，查看集羣信息：
[root@centos125 redis-cluster]# ./redis-trib.rb check 127.0.0.1:7001
>>> Performing Cluster Check (using node 127.0.0.1:7001)
M: 06ee0333aeac6b0f4cf3161c0e9750c72d8a9def 127.0.0.1:7001
slots:0-5460 (5461 slots) master
1 additional replica(s)
M: 20d3e411c9729ab5501668a99098138edbcaf82c 127.0.0.1:7002
slots:5461-10922 (5462 slots) master
1 additional replica(s)
M: 0aa8014a9f0cb90f9bf9a77e29df462e1acc447a 127.0.0.1:7003
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: af9ec87ee2f6bec0ce791b43a13d1784d9773017 127.0.0.1:7004
slots: (0 slots) slave
replicates 0aa8014a9f0cb90f9bf9a77e29df462e1acc447a
S: bec0dc2ae04ea8d2120e66f72c67134236b0c5dc 127.0.0.1:7006
slots: (0 slots) slave
replicates 20d3e411c9729ab5501668a99098138edbcaf82c
S: aee308c2d15feda5550d5ceba13d1305d3edb941 127.0.0.1:7005
slots: (0 slots) slave
replicates 06ee0333aeac6b0f4cf3161c0e9750c72d8a9def
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
使用redis客戶端登錄集羣后，常用命令：
[root@centos125 redis-cluster]# cd redis01/bin/
[root@centos125 bin]# ./redis-cli -c -p 7001
127.0.0.1:7001> cluster nodes
20d3e411c9729ab5501668a99098138edbcaf82c 127.0.0.1:7002@17002 master - 0 1560155956207 2 connected 5461-10922
0aa8014a9f0cb90f9bf9a77e29df462e1acc447a 127.0.0.1:7003@17003 master - 0 1560155955204 3 connected 10923-16383
af9ec87ee2f6bec0ce791b43a13d1784d9773017 127.0.0.1:7004@17004 slave 0aa8014a9f0cb90f9bf9a77e29df462e1acc447a 0 1560155953197 4 connected
bec0dc2ae04ea8d2120e66f72c67134236b0c5dc 127.0.0.1:7006@17006 slave 20d3e411c9729ab5501668a99098138edbcaf82c 0 1560155955000 6 connected
06ee0333aeac6b0f4cf3161c0e9750c72d8a9def 127.0.0.1:7001@17001 myself,master - 0 1560155954000 1 connected 0-5460
aee308c2d15feda5550d5ceba13d1305d3edb941 127.0.0.1:7005@17005 slave 06ee0333aeac6b0f4cf3161c0e9750c72d8a9def 0 1560155955000 5 connected
127.0.0.1:7001> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:872
cluster_stats_messages_pong_sent:772
cluster_stats_messages_sent:1644
cluster_stats_messages_ping_received:767
cluster_stats_messages_pong_received:872
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:1644
1.查看當前集羣信息
cluster info
2.查看集羣節點信息
cluster nodes