多機(jī)集群見我的另一篇文檔《docker-compose啟動redis多機(jī)集群（6臺服務(wù)器3主3從）》狮惜，此處是一個用于學(xué)習(xí)的偽集群拔稳。
1. 偽集群安裝
docker-compose.yml
創(chuàng)建redis-cluster目錄捉超，目錄下創(chuàng)建docker-compose.yml文件如下
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'
持久化存儲
我們直接啟動這些目錄是可以創(chuàng)建的仰泻，但是容器中沒有使用root用戶短条，一般服務(wù)器都不會有寫權(quán)限剑辫。因此
- 我們手工創(chuàng)建這些目錄阱飘，先給讀寫權(quán)限。
- 建議等啟動后速妖，看到是對應(yīng)宿主機(jī)哪個用戶了高蜂，我們再將目錄屬主改為哪個用戶。
- 創(chuàng)建存儲目錄
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
啟動集群
- 啟動集群
# docker-compose up -d
- 查看結(jié)果
[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
集群初始化
- 初始化集群
進(jìn)入其中一個容器罕容，執(zhí)行命令如下：
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
輸出如下：
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.
- 查看集群狀態(tài)
redis-cli -h redis-node-0 -a liubei@161 cluster info
輸出信息如下：
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:/$
- 查看集群節(jié)點(diǎn)狀態(tài)
redis-cli -h redis-node-0 -a liubei@161 cluster nodes
輸出
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
2. 測試
讀寫測試
- 以集群模式登錄
redis-cli -h redis-nod-1 -a liubei@161 -c
- 寫入數(shù)據(jù)
redis-node-1:6379> set name liubei
OK
- 在另一個節(jié)點(diǎn)上讀
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>
我們可以看到备恤，連接會跳到存儲這個key的節(jié)點(diǎn)上（192.168.0.3）。
key所在節(jié)點(diǎn)
- 登錄其中一個節(jié)點(diǎn)
redis-cli -h redis-node-0 -a liubei@161 -c
- 查看節(jié)點(diǎn)哈希槽編號的范圍
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)
- 查看
name的哈希槽編號
redis-node-0:6379> cluster keyslot name
(integer) 5798
通過第一步查看節(jié)點(diǎn)哈希槽編號的范圍我們可以看到5798 這個編號在 192.168.0.3 上
如果我們不用集群模式登錄锦秒，只能在該節(jié)點(diǎn)上讀取到這個key值露泊。
- 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key脂崔，我們的連接跳到了 192.168.0.3上滤淳。
- 非集群模式登錄查看
登錄其他節(jié)點(diǎn)，會提示我們這個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
只有登錄這個節(jié)點(diǎn)才能查詢到值
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"
