簡單說下自己測試搭建簡單的redis集群的大體步驟：

1.首先你的有6個(gè)redis（官方說最少6個(gè)，3master，3slave），可以先在一臺機(jī)器上搭建，搭建到多臺上應(yīng)該只需要改變啟動命令即可（可能需要一些ssh無密鑰什么的，只是猜測）

在網(wǎng)上隨便可以找到的配置多個(gè)redis，（總體有兩種方式，一種是虛擬的，貌似走的都是一個(gè)redis，一種是將配置好的redis復(fù)制成六份，配置相應(yīng)的端口等，我選擇的后者顯得更真實(shí)一些）

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然后把他們?nèi)看蜷_，可以寫一個(gè)腳本，或者一個(gè)一個(gè)打開，作為一個(gè)新世紀(jì)的年輕人，我當(dāng)然選擇一個(gè)一個(gè)打開它們......

[root@localhost ~]# ps -ef | grep redis root 3427 1 0 7月17 ? 00:02:59 src/redis-server *:6379 root 3454 1 0 7月17 ? 00:06:09 src/redis-server *:7001 [cluster] root 3460 1 0 7月17 ? 00:06:19 src/redis-server *:7002 [cluster] root 3467 1 0 7月17 ? 00:05:59 src/redis-server *:7003 [cluster] root 3473 1 0 7月17 ? 00:05:59 src/redis-server *:7004 [cluster] root 3477 1 0 7月17 ? 00:05:57 src/redis-server *:7005 [cluster] root 5867 1 0 12:02 ? 00:00:06 src/redis-server *:7000 [cluster] root 5938 5913 0 13:17 pts/1 00:00:00 grep --color=auto redis

2.將6個(gè)獨(dú)立redis設(shè)置為集群，so easy 一句話搞定。其中 --replicas 參數(shù)是將6臺redis分別分配了主從關(guān)系（master掛掉slave可以頂替，但是還沒有具體深入研究）

./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

在開啟過程中可能會遇到很多問題，各種奇怪的報(bào)錯(cuò)，那就要安裝ruby和gem的一些東東，搞不明白是什么，反正就是依賴吧~ ，只能說按照這個(gè)來會繞開很多坑。

# yum install ruby-devel.x86_64# wget http://rubygems.global.ssl.fastly.net/gems/redis-3.2.1.gem # gem install -l ./redis-3.2.1.gem

執(zhí)行這些代碼之后再去執(zhí)行上面建立集群的命令，如果成功的話，會看到下面的樣子：

>>> Creating cluster Connecting to node 127.0.0.1:7000: OK Connecting to node 127.0.0.1:7001: OK Connecting to node 127.0.0.1:7002: OK Connecting to node 127.0.0.1:7003: OK Connecting to node 127.0.0.1:7004: OK Connecting to node 127.0.0.1:7005: OK >>> 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: ad52e4f7c14da4b8b1e8e48603c9e5515a4cec7a 127.0.0.1:7000 slots:0-5460 (5461 slots) master M: d3058a19483d7be5c30c042779e56130f6ebf074 127.0.0.1:7001 slots:5461-10922 (5462 slots) master M: 5814305e71552ab45c44b9b8233681a63c3a57b1 127.0.0.1:7002 slots:10923-16383 (5461 slots) master S: e50676757acbe7c6a21e8abf4eda26ababb08285 127.0.0.1:7003 replicates ad52e4f7c14da4b8b1e8e48603c9e5515a4cec7a S: ab307ba26d6dabe8edb2f2a7287be6f01aa46d88 127.0.0.1:7004 replicates d3058a19483d7be5c30c042779e56130f6ebf074 S: 11174332eb6ad40c0327750536fa776d706caf85 127.0.0.1:7005 replicates 5814305e71552ab45c44b9b8233681a63c3a57b1 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: ad52e4f7c14da4b8b1e8e48603c9e5515a4cec7a 127.0.0.1:7000 slots:0-5460 (5461 slots) master M: d3058a19483d7be5c30c042779e56130f6ebf074 127.0.0.1:7001 slots:5461-10922 (5462 slots) master M: 5814305e71552ab45c44b9b8233681a63c3a57b1 127.0.0.1:7002 slots:10923-16383 (5461 slots) master M: e50676757acbe7c6a21e8abf4eda26ababb08285 127.0.0.1:7003 slots: (0 slots) master replicates ad52e4f7c14da4b8b1e8e48603c9e5515a4cec7a M: ab307ba26d6dabe8edb2f2a7287be6f01aa46d88 127.0.0.1:7004 slots: (0 slots) master replicates d3058a19483d7be5c30c042779e56130f6ebf074 M: 11174332eb6ad40c0327750536fa776d706caf85 127.0.0.1:7005 slots: (0 slots) master replicates 5814305e71552ab45c44b9b8233681a63c3a57b1 <span style="color:#009900;">[OK] All nodes agree about slots configuration.</span> >>> Check for open slots... >>> Check slots coverage... <span style="color:#009900;">[OK] All 16384 slots covered.</span></span>

3.測試集群。

可以用下面的命令查看集群的狀態(tài)，從下面可以看出有4個(gè)master，2個(gè)slave~~~，這個(gè)是由于我太年輕kill了7000的redis又加入了進(jìn)來，原先他的slave 7003 也變成了master頂替了他。

[root@localhost src]# ./redis-trib.rb check 127.0.0.1:7000 Connecting to node 127.0.0.1:7000: OK Connecting to node 127.0.0.1:7005: OK Connecting to node 127.0.0.1:7003: OK Connecting to node 127.0.0.1:7002: OK Connecting to node 127.0.0.1:7001: OK Connecting to node 127.0.0.1:7004: OK >>> Performing Cluster Check (using node 127.0.0.1:7000) M: 4eb95ab689288dbb3ebf7ed380a0593ec9daa878 127.0.0.1:7000slots: (0 slots) master0 additional replica(s) S: 11174332eb6ad40c0327750536fa776d706caf85 127.0.0.1:7005slots: (0 slots) slavereplicates 5814305e71552ab45c44b9b8233681a63c3a57b1 M: e50676757acbe7c6a21e8abf4eda26ababb08285 127.0.0.1:7003slots:0-5460 (5461 slots) master0 additional replica(s) M: 5814305e71552ab45c44b9b8233681a63c3a57b1 127.0.0.1:7002slots:10923-16383 (5461 slots) master1 additional replica(s) M: d3058a19483d7be5c30c042779e56130f6ebf074 127.0.0.1:7001slots:5461-10922 (5462 slots) master1 additional replica(s) S: ab307ba26d6dabe8edb2f2a7287be6f01aa46d88 127.0.0.1:7004slots: (0 slots) slavereplicates d3058a19483d7be5c30c042779e56130f6ebf074 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.

可以進(jìn)入redis中玩一玩：查了一下使用redis-cli命令的時(shí)候應(yīng)該加上 -c ，意思是在集群模式下，否則你會以一種獨(dú)立的redis進(jìn)入，然后各種moved報(bào)錯(cuò)。

看著存儲位置跳來跳去，貌似簡單的集群也就搭建完成了。

[root@localhost src]# ./redis-cli -c -p 7000 127.0.0.1:7000> set qiang weikang -> Redirected to slot [1357] located at 127.0.0.1:7003 OK 127.0.0.1:7003> set qiang qiang OK 127.0.0.1:7003> set weikang qiang -> Redirected to slot [12142] located at 127.0.0.1:7002 OK 127.0.0.1:7002> get qiang -> Redirected to slot [1357] located at 127.0.0.1:7003 "qiang" 127.0.0.1:7003> get weikang -> Redirected to slot [12142] located at 127.0.0.1:7002 "qiang"

轉(zhuǎn)載于:https://www.cnblogs.com/lvcisco/p/10309513.html

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