資訊專欄INFORMATION COLUMN
第一步：進(jìn)行偽集的群安裝
1.1：創(chuàng)建redis-cluster目錄
我們需要先創(chuàng)建名為redis-cluster目錄，在這個(gè)目錄下創(chuàng)建一個(gè)docker-compose.yml文件
docker-compose.yml
version: '2.2' x-image: &default-image bitnami/redis-cluster:7.0 x-restart: &default-restart always services: redis-node-0: image: *default-image restart: *default-restart container_name: redis-node-0 ports: - 6379:6379 volumes: - ./redis-cluster_data-0:/bitnami/redis/data environment: - 'REDIS_PASSWORD=liubei@161' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5' redis-node-1: image: *default-image restart: *default-restart container_name: redis-node-1 ports: - 16379:6379 volumes: - ./redis-cluster_data-1:/bitnami/redis/data environment: - 'REDIS_PASSWORD=liubei@161' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5' redis-node-2: image: *default-image restart: *default-restart container_name: redis-node-2 ports: - 26379:6379 volumes: - ./redis-cluster_data-2:/bitnami/redis/data environment: - 'REDIS_PASSWORD=liubei@161' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5' redis-node-3: image: *default-image restart: *default-restart container_name: redis-node-3 ports: - 36379:6379 volumes: - ./redis-cluster_data-3:/bitnami/redis/data environment: - 'REDIS_PASSWORD=liubei@161' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5' redis-node-4: image: *default-image restart: *default-restart container_name: redis-node-4 ports: - 46379:6379 volumes: - ./redis-cluster_data-4:/bitnami/redis/data environment: - 'REDIS_PASSWORD=liubei@161' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5' redis-node-5: image: *default-image restart: *default-restart container_name: redis-node-5 ports: - 56379:6379 volumes: - ./redis-cluster_data-5:/bitnami/redis/data depends_on: - redis-node-0 - redis-node-1 - redis-node-2 - redis-node-3 - redis-node-4 environment: - 'REDIS_PASSWORD=liubei@161' - 'REDIS_NODES=redis-node-0 redis-node-1 redis-node-2 redis-node-3 redis-node-4 redis-node-5'
1.2:進(jìn)行持久化存儲(chǔ)
這些可以創(chuàng)建的目錄我們能夠直接啟動(dòng)，但我們?cè)谌萜髦袥]有使用root用戶，大部分服務(wù)器都不會(huì)有寫權(quán)限。因此
我們要先給這些目錄讀寫權(quán)限。最后看對(duì)應(yīng)宿主機(jī)是哪個(gè)用戶，我們?cè)賹⒛夸泴僦鞲臑槟膫€(gè)用戶即可。
儲(chǔ)存目錄
mkdir redis-cluster_data-{0..5}
chmod 777 redis-cluster-data-*結(jié)果如下
[root@liubei redis-cluster]# ll 總用量 7 -rw-r----- 1 root root 2481 7月 6 10:21 docker-compose.yml drwxrwxrwx 3 root root 61 7月 6 10:43 redis-cluster_data-0 drwxrwxrwx 3 root root 61 7月 6 10:43 redis-cluster_data-1 drwxrwxrwx 3 root root 61 7月 6 10:43 redis-cluster_data-2 drwxrwxrwx 3 root root 77 7月 6 10:51 redis-cluster_data-3 drwxrwxrwx 3 root root 77 7月 6 10:51 redis-cluster_data-4 drwxrwxrwx 3 root root 77 7月 6 10:51 redis-cluster_data-5
1.3：?jiǎn)?dòng)集群
啟動(dòng)
# docker-compose up -d
結(jié)果如下
[root@liubei redis-cluster]# docker-compose ps Name Command State Ports ------------------------------------------------------------------------------- redis-node-0 /opt/bitnami/scripts/redis ... Up 0.0.0.0:6379->6379/tcp redis-node-1 /opt/bitnami/scripts/redis ... Up 0.0.0.0:16379->6379/tcp redis-node-2 /opt/bitnami/scripts/redis ... Up 0.0.0.0:26379->6379/tcp redis-node-3 /opt/bitnami/scripts/redis ... Up 0.0.0.0:36379->6379/tcp redis-node-4 /opt/bitnami/scripts/redis ... Up 0.0.0.0:46379->6379/tcp redis-node-5 /opt/bitnami/scripts/redis ... Up 0.0.0.0:56379->6379/tcp
1.4：初始化集群
我們先進(jìn)入其中的一個(gè)容器，執(zhí)行以下這條命令
I have no name!@d4a8a3ef35ce:/$ redis-cli -a liubei@161 --cluster create redis-node-0:6379 redis-node-1:6379 redis-node-2:6379 redis-node-3:6379 redis-node-4:6379 redis-node-5:6379 --cluster-replicas 1
執(zhí)行結(jié)果如下
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 redis-node-4:6379 to redis-node-0:6379 Adding replica redis-node-5:6379 to redis-node-1:6379 Adding replica redis-node-3:6379 to redis-node-2:6379 M: 4cdf0f24f67eadb3b7a610fd9b5409a571cce8d3 redis-node-0:6379 slots:[0-5460] (5461 slots) master M: ee85d84a95793ee031a4b45fe3600ef81ecef7d1 redis-node-1:6379 slots:[5461-10922] (5462 slots) master M: f48ab32421dfe4405b73129d88f64a4ce4d076e3 redis-node-2:6379 slots:[10923-16383] (5461 slots) master S: 0315d864aec40531c9630d5e21959aea6837236e redis-node-3:6379 replicates f48ab32421dfe4405b73129d88f64a4ce4d076e3 S: ec43dee472ce9f1531ccdbd0853cd672519ec2fe redis-node-4:6379 replicates 4cdf0f24f67eadb3b7a610fd9b5409a571cce8d3 S: c834ba17bfdf0d498533355022e548b040083ed9 redis-node-5:6379 replicates ee85d84a95793ee031a4b45fe3600ef81ecef7d1 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 redis-node-0:6379) M: 4cdf0f24f67eadb3b7a610fd9b5409a571cce8d3 redis-node-0:6379 slots:[0-5460] (5461 slots) master 1 additional replica(s) S: ec43dee472ce9f1531ccdbd0853cd672519ec2fe 172.29.0.2:6379 slots: (0 slots) slave replicates 4cdf0f24f67eadb3b7a610fd9b5409a571cce8d3 M: f48ab32421dfe4405b73129d88f64a4ce4d076e3 172.29.0.4:6379 slots:[10923-16383] (5461 slots) master 1 additional replica(s) M: ee85d84a95793ee031a4b45fe3600ef81ecef7d1 172.29.0.5:6379 slots:[5461-10922] (5462 slots) master 1 additional replica(s) S: 0315d864aec40531c9630d5e21959aea6837236e 172.29.0.6:6379 slots: (0 slots) slave replicates f48ab32421dfe4405b73129d88f64a4ce4d076e3 S: c834ba17bfdf0d498533355022e548b040083ed9 172.29.0.7:6379 slots: (0 slots) slave replicates ee85d84a95793ee031a4b45fe3600ef81ecef7d1 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
執(zhí)行這條代碼，查看集群狀態(tài)
redis-cli -h redis-node-0 -a liubei@161 cluster info
輸出結(jié)果如下：
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 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:174 cluster_stats_messages_pong_sent:203 cluster_stats_messages_sent:377 cluster_stats_messages_ping_received:198 cluster_stats_messages_pong_received:174 cluster_stats_messages_meet_received:5 cluster_stats_messages_received:377 total_cluster_links_buffer_limit_exceeded:0 I have no name!@c193f9814adb:/$
然后看一下集群節(jié)點(diǎn)狀態(tài)
redis-cli -h redis-node-0 -a liubei@161 cluster nodes
結(jié)果
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 921dd4fc8977562273e8f0f297d7809f5d785a96 192.168.0.2:6379@16379 myself,master - 0 1657079063000 1 connected 0-5460 e3be1ac5c4b5a8ea5789dd62aaa550cece718504 192.168.0.5:6379@16379 slave 921dd4fc8977562273e8f0f297d7809f5d785a96 0 1657079062000 1 connected d45ea5232290aefd17ec87229b2b68be76061b84 192.168.0.6:6379@16379 slave 505a1c9a1e3bc8b7685a6cdf6aa1d82bd48cc95f 0 1657079063278 3 connected 88f0d7a2377bf876105925e330793091f2390a20 192.168.0.4:6379@16379 slave 477f835648ca3ddffa48af99a2e162e541277186 0 1657079062274 2 connected 505a1c9a1e3bc8b7685a6cdf6aa1d82bd48cc95f 192.168.0.7:6379@16379 master - 0 1657079064281 3 connected 10923-16383 477f835648ca3ddffa48af99a2e162e541277186 192.168.0.3:6379@16379 master - 0 1657079065285 2 connected 5461-10922
第二步：測(cè)試
2.1：進(jìn)行讀寫測(cè)試
用集群模式登錄
redis-cli -h redis-nod-1 -a liubei@161 -c
數(shù)據(jù)載入
redis-node-1:6379> set name liubei OK
另一個(gè)節(jié)點(diǎn)上讀取
I have no name!@ab2a18399901:/$ redis-cli -h redis-node-5 -a liubei@161 -c Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. redis-node-5:6379> get name -> Redirected to slot [5798] located at 192.168.0.3:6379 "liubei" 192.168.0.3:6379>
讀取后我們發(fā)現(xiàn)，連接會(huì)跳到存儲(chǔ)這個(gè)key的節(jié)點(diǎn)上(192.168.0.3)
2.2：key所在節(jié)點(diǎn)
隨便登錄一個(gè)節(jié)點(diǎn)
redis-cli -h redis-node-0 -a liubei@161 -c
我們就會(huì)看到節(jié)點(diǎn)哈希槽編號(hào)的范圍
redis-node-0:6379> cluster slots 1) 1) (integer) 0 2) (integer) 5460 3) 1) "192.168.0.2" 2) (integer) 6379 3) "921dd4fc8977562273e8f0f297d7809f5d785a96" 4) (empty array) 4) 1) "192.168.0.5" 2) (integer) 6379 3) "e3be1ac5c4b5a8ea5789dd62aaa550cece718504" 4) (empty array) 2) 1) (integer) 5461 2) (integer) 10922 3) 1) "192.168.0.3" 2) (integer) 6379 3) "477f835648ca3ddffa48af99a2e162e541277186" 4) (empty array) 4) 1) "192.168.0.4" 2) (integer) 6379 3) "88f0d7a2377bf876105925e330793091f2390a20" 4) (empty array) 3) 1) (integer) 10923 2) (integer) 16383 3) 1) "192.168.0.7" 2) (integer) 6379 3) "505a1c9a1e3bc8b7685a6cdf6aa1d82bd48cc95f" 4) (empty array) 4) 1) "192.168.0.6" 2) (integer) 6379 3) "d45ea5232290aefd17ec87229b2b68be76061b84" 4) (empty array)
再查看一下name的哈希槽編號(hào)
redis-node-0:6379> cluster keyslot name (integer) 5798
可以看到，哈希槽編號(hào)的范圍我們可以看到5798 這個(gè)編號(hào)在 192.168.0.3 上，如果想要在其他節(jié)點(diǎn)上讀取到這個(gè)key值，就需要集群模式登錄
集群模式驗(yàn)證是否準(zhǔn)確
redis-node-0:6379> get name -> Redirected to slot [5798] located at 192.168.0.3:6379 "liubei" 192.168.0.3:6379>
集群模式登錄，查找這個(gè)key，我們的連接會(huì)跳到了 192.168.0.3上。在非集群模式登錄查看的話，
如果登錄到其他節(jié)點(diǎn)，會(huì)提示我們這個(gè)key存在了192.168.0.3上
I have no name!@ab2a18399901:/$ redis-cli -h 192.168.0.5 -a liubei@161 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.0.5:6379> get name (error) MOVED 5798 192.168.0.3:6379
想要查詢到值只有登錄這個(gè)節(jié)點(diǎn)才行
I have no name!@ab2a18399901:/$ redis-cli -h 192.168.0.3 -a liubei@161 Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe. 192.168.0.3:6379> get name "liubei"
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