手動創建Redis集羣
啓動Redis實例
將默認的配置文件拷貝六份
# ls -l
total 360
-rw-r--r--. 1 root root 58816 Mar 26 10:19 redis-6374.conf
-rw-r--r--. 1 root root 58816 Mar 26 10:19 redis-6375.conf
-rw-r--r--. 1 root root 58816 Mar 26 10:19 redis-6376.conf
-rw-r--r--. 1 root root 58816 Mar 26 10:19 redis-6377.conf
-rw-r--r--. 1 root root 58816 Mar 26 10:18 redis-6378.conf
-rw-r--r--. 1 root root 58816 Mar 26 10:18 redis-6379.conf
修改配置文件，重點是要對應端口號改
bind 0.0.0.0
port 6379
daemonize yes
supervised auto
pidfile /var/run/redis_6379.pid
logfile "/var/log/redis/redis_6379.log"
dir /usr/local/redis/data/6379
最後一定不要忘記設置支持集羣模式
cluster-enabled yes
cluster-config-file nodes-6379.conf
由於只是測試，其他的配置用默認的了
啓動實例
for i in `seq 6374 6379`; do
redis-server redis-$i.conf
done
# ps -ef | grep redis
root 30588 1 0 10:21 ? 00:00:04 /usr/local/redis/bin/redis-server 127.0.0.1:6374 [cluster]
root 30590 1 0 10:21 ? 00:00:04 /usr/local/redis/bin/redis-server 127.0.0.1:6375 [cluster]
root 30592 1 0 10:21 ? 00:00:04 /usr/local/redis/bin/redis-server 127.0.0.1:6376 [cluster]
root 30594 1 0 10:21 ? 00:00:04 /usr/local/redis/bin/redis-server 127.0.0.1:6377 [cluster]
root 30596 1 0 10:21 ? 00:00:04 /usr/local/redis/bin/redis-server 127.0.0.1:6378 [cluster]
root 30598 1 0 10:21 ? 00:00:04 /usr/local/redis/bin/redis-server 127.0.0.1:6379 [cluster]
# netstat -ntpl | grep redis
tcp 0 0 127.0.0.1:6375 0.0.0.0:* LISTEN 30590/redis-server
tcp 0 0 127.0.0.1:6376 0.0.0.0:* LISTEN 30592/redis-server
tcp 0 0 127.0.0.1:6377 0.0.0.0:* LISTEN 30594/redis-server
tcp 0 0 127.0.0.1:6378 0.0.0.0:* LISTEN 30596/redis-server
tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN 30598/redis-server
tcp 0 0 127.0.0.1:16374 0.0.0.0:* LISTEN 30588/redis-server
tcp 0 0 127.0.0.1:16375 0.0.0.0:* LISTEN 30590/redis-server
tcp 0 0 127.0.0.1:16376 0.0.0.0:* LISTEN 30592/redis-server
tcp 0 0 127.0.0.1:16377 0.0.0.0:* LISTEN 30594/redis-server
tcp 0 0 127.0.0.1:16378 0.0.0.0:* LISTEN 30596/redis-server
tcp 0 0 127.0.0.1:16379 0.0.0.0:* LISTEN 30598/redis-server
tcp 0 0 127.0.0.1:6374 0.0.0.0:* LISTEN 30588/redis-server
將6個Redis實例都加入集羣
# redis-cli -h 127.0.0.1 -p 6379
127.0.0.1:6379> cluster meet 127.0.0.1 6378
OK
127.0.0.1:6379> cluster meet 127.0.0.1 6377
OK
127.0.0.1:6379> cluster meet 127.0.0.1 6376
OK
127.0.0.1:6379> cluster meet 127.0.0.1 6375
OK
127.0.0.1:6379> cluster meet 127.0.0.1 6374
OK
分配slots
# redis-cli -h 127.0.0.1 -p 6379 cluster addslots {0..5461}
# redis-cli -h 127.0.0.1 -p 6379 cluster addslots {5462..10922}
# redis-cli -h 127.0.0.1 -p 6379 cluster addslots {10923..16383}
將三個從節點跟主節點關聯起來
先獲取所有實例的cluster ID
# redis-cli -h 127.0.0.1 -p 6379 cluster nodes
# redis-cli -h 127.0.0.1 -p 6376 cluster replicate + Master-1-ID
# redis-cli -h 127.0.0.1 -p 6375 cluster replicate + Master-2-ID
# redis-cli -h 127.0.0.1 -p 6374 cluster replicate + Master-3-ID
# redis-cli -h 127.0.0.1 -p 6379 cluster nodes
00222f46f6be1de9a3e0b07b870ee0c7ec70154a 127.0.0.1:6374@16374 slave 1de96395a35a4fd180e7d5262b9e6bc3497c7cce 0 1553582471453 5 connected
659654dbf3c62cfabb43e0caac846fa2d9603714 127.0.0.1:6379@16379 myself,master - 0 1553582470000 0 connected 0-5461
54bc29bc5f9ad2449f5edfddd47d5addddb70057 127.0.0.1:6378@16378 master - 0 1553582468445 1 connected 5462-10922
1de96395a35a4fd180e7d5262b9e6bc3497c7cce 127.0.0.1:6377@16377 master - 0 1553582468000 2 connected 10923-16383
5b1c9fdef01a73fa208731723e53aa2f042b1a98 127.0.0.1:6376@16376 slave 659654dbf3c62cfabb43e0caac846fa2d9603714 0 1553582468000 3 connected
2f9c905399927aada1ea6f57ea4693e4ec0f9c4e 127.0.0.1:6375@16375 slave 54bc29bc5f9ad2449f5edfddd47d5addddb70057 0 1553582470451 4 connected
# redis-cli -h 127.0.0.1 -p 6379 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:5
cluster_my_epoch:0
cluster_stats_messages_ping_sent:15591
cluster_stats_messages_pong_sent:15344
cluster_stats_messages_meet_sent:5
cluster_stats_messages_sent:30940
cluster_stats_messages_ping_received:15344
cluster_stats_messages_pong_received:15596
cluster_stats_messages_received:30940
cluster_state:ok說明集羣狀態是正常的，基本上這樣就算搭成功了。
簡單的測試一下
連接集羣的時候加上參數-c
# redis-cli -c -h 127.0.0.1 -p 6379
127.0.0.1:6379> CLUSTER KEYSLOT hello
(integer) 866
127.0.0.1:6379> CLUSTER KEYSLOT test
(integer) 6918
127.0.0.1:6379> set test 123
-> Redirected to slot [6918] located at 127.0.0.1:6378
OK
127.0.0.1:6378> set hello 321
-> Redirected to slot [866] located at 127.0.0.1:6379
OK
127.0.0.1:6379> get test
-> Redirected to slot [6918] located at 127.0.0.1:6378
"123"
127.0.0.1:6378> get hello
-> Redirected to slot [866] located at 127.0.0.1:6379
"321"
127.0.0.1:6379>