Redis cluster集群需要至少多少個(gè)redis節(jié)點(diǎn)

這篇文章主要介紹“Redis cluster集群需要至少多少個(gè)redis節(jié)點(diǎn)”，在日常操作中，相信很多人在Redis cluster集群需要至少多少個(gè)redis節(jié)點(diǎn)問(wèn)題上存在疑惑，小編查閱了各式資料，整理出簡(jiǎn)單好用的操作方法，希望對(duì)大家解答”Redis cluster集群需要至少多少個(gè)redis節(jié)點(diǎn)”的疑惑有所幫助！接下來(lái)，請(qǐng)跟著小編一起來(lái)學(xué)習(xí)吧！

##配置redis集群需要至少6個(gè)redis節(jié)點(diǎn)

集群至少3主3從才可以搭建，防止錯(cuò)亂我們?cè)趓edis 下建立一個(gè)文件夾cluster，里面復(fù)制6份配置文件，改名為redis1-redis6.conf

把每個(gè)配置文件都修改以下共同點(diǎn)：

bind 10.233.19.36 （根據(jù)實(shí)際情況配置）

port 7001 （7001-7006）

daemonize yes（以守護(hù)進(jìn)程運(yùn)行）

pidfile /var/run/redis.pid （守護(hù)進(jìn)程生成的文件，以實(shí)際情況配置）

appendonly yes （開(kāi)啟AOF日志記錄Redis操作的持久化）

appendfilename "appendonly-7001.aof" （AOF文件名，配置端口為文件名便于查看）

cluster-enabled yes （開(kāi)啟集群）

cluster-config-file nodes-7001.conf （節(jié)點(diǎn)信息，已節(jié)點(diǎn)命名便于查看）

cluster-node-timeout 15000 （節(jié)點(diǎn)響應(yīng)超時(shí)時(shí)間）

以上為共同點(diǎn)每個(gè)節(jié)點(diǎn)不論主從都需要配置。

此外還需要注意，不要再為各個(gè)節(jié)點(diǎn)主動(dòng)配置主從關(guān)系，否則啟動(dòng)時(shí)會(huì)報(bào)錯(cuò)。

因?yàn)橹鲝年P(guān)系要給redis集群自己調(diào)節(jié)。

##啟動(dòng)redis集群

上面的配置完成之后，分別啟動(dòng)6個(gè)redis實(shí)例。配置正確的情況下，都可以啟動(dòng)成功。然后運(yùn)行如下命令創(chuàng)建集群：

注意，這里使用的是ip:port   

replicas 1 表示我們希望為集群中的每個(gè)主節(jié)點(diǎn)創(chuàng)建一個(gè)從節(jié)點(diǎn)

因?yàn)榕渲梦募性O(shè)置了密碼所以創(chuàng)建集群也需要加密碼參數(shù) -a

[ERR] Node 10.233.19.36:6380 NOAUTH Authentication required.

[redis@weblogic-test bin]$ ./redis-cli --cluster create 10.233.19.36:6380 10.233.19.36:6381 10.233.19.36:6382 10.233.19.36:6383 10.233.19.36:6384 10.233.19.36:6385 --cluster-replicas 1 -a beijing

Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.

>>> Performing hash slots allocation on 6 nodes...

Master[0] -> Slots 0 - 5460

Master[1] -> Slots 5461 - 10922

Master[2] -> Slots 10923 - 16383

Adding replica 10.233.19.36:6383 to 10.233.19.36:6380

Adding replica 10.233.19.36:6384 to 10.233.19.36:6381

Adding replica 10.233.19.36:6385 to 10.233.19.36:6382

>>> Trying to optimize slaves allocation for anti-affinity

[WARNING] Some slaves are in the same host as their master

M: 369151e4f1bed1e3fcaf474025853bc72056542e 10.233.19.36:6380

   slots:[0-5460] (5461 slots) master

M: 1f9314f13a22c2c68c609e98247bfe6d0714c75b 10.233.19.36:6381

   slots:[5461-10922] (5462 slots) master

M: 41840a493fceef875b1a521d951090f9c99c7040 10.233.19.36:6382

   slots:[10923-16383] (5461 slots) master

S: 438c5ecaf7501da25bfc0d2055445c036907ba61 10.233.19.36:6383

   replicates 1f9314f13a22c2c68c609e98247bfe6d0714c75b

S: 9598769e90155aeb130a33980ac1a1c27b1609cc 10.233.19.36:6384

   replicates 41840a493fceef875b1a521d951090f9c99c7040

S: b0d325e936ee5055648561302560d055d0bdb365 10.233.19.36:6385

   replicates 369151e4f1bed1e3fcaf474025853bc72056542e

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 10.233.19.36:6380)

M: 369151e4f1bed1e3fcaf474025853bc72056542e 10.233.19.36:6380

   slots:[0-5460] (5461 slots) master

   1 additional replica(s)

M: 1f9314f13a22c2c68c609e98247bfe6d0714c75b 10.233.19.36:6381

   slots:[5461-10922] (5462 slots) master

   1 additional replica(s)

S: 9598769e90155aeb130a33980ac1a1c27b1609cc 10.233.19.36:6384

   slots: (0 slots) slave

   replicates 41840a493fceef875b1a521d951090f9c99c7040

M: 41840a493fceef875b1a521d951090f9c99c7040 10.233.19.36:6382

   slots:[10923-16383] (5461 slots) master

   1 additional replica(s)

S: b0d325e936ee5055648561302560d055d0bdb365 10.233.19.36:6385

   slots: (0 slots) slave

   replicates 369151e4f1bed1e3fcaf474025853bc72056542e

S: 438c5ecaf7501da25bfc0d2055445c036907ba61 10.233.19.36:6383

   slots: (0 slots) slave

   replicates 1f9314f13a22c2c68c609e98247bfe6d0714c75b

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.

執(zhí)行成功之后，連接一臺(tái)redis，執(zhí)行 cluster info 會(huì)看到類(lèi)似如下信息：

127.0.0.1:6380> 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:190

cluster_stats_messages_pong_sent:181

cluster_stats_messages_sent:371

cluster_stats_messages_ping_received:176

cluster_stats_messages_pong_received:190

cluster_stats_messages_meet_received:5

cluster_stats_messages_received:371

我們可以看到cluster_state:ok,cluster_slots_ok:16384,cluster_size:3。

到此，關(guān)于“Redis cluster集群需要至少多少個(gè)redis節(jié)點(diǎn)”的學(xué)習(xí)就結(jié)束了，希望能夠解決大家的疑惑。理論與實(shí)踐的搭配能更好的幫助大家學(xué)習(xí)，快去試試吧！若想繼續(xù)學(xué)習(xí)更多相關(guān)知識(shí)，請(qǐng)繼續(xù)關(guān)注億速云網(wǎng)站，小編會(huì)繼續(xù)努力為大家?guī)?lái)更多實(shí)用的文章！