1.搭建Redis Cluster主要步驟
1.配置開啟節點
2.meet
3.指派槽
4.主從關系分配
2.環境說明
兩台虛擬機，IP地址分別為：192.168.81.100和192.168.81.101
兩台虛擬機操作系統均為：CentOS 7.5 64位
兩台虛擬機系統說明：
使用yum方式安裝Redis
關閉firewalld防火牆
使用兩台虛擬機的7000,7001,7002端口搭建三主三從的Redis Cluster
其中192.168.81.100主機三個端口啟動的Redis Server為主節點
192.168.81.101主機三個端口啟動的Redis Server為從節點
3.搭建Redis Cluster步驟
3.1 在192.168.81.100虛擬機上操作
[root@host1 etc]# cd /opt
[root@host1 opt]# mkdir config
[root@host1 opt]# cd config
[root@host1 config]# vi redis_7000.conf # 創建7000端口運行需要的配置文件，文件內容如下
port 7000
daemonize yes
dir '/var/lib/redis'
logfile '/var/log/redis/redis_7000.log'
dbfilename 'redis_7000.data'
cluster-enabled yes
cluster-config-file nodes-7000.conf
cluster-require-full-coverage no
[root@host1 config]# sed 's/7000/7001/g' redis_7000.conf > redis_7001.conf # 把redis_7000.conf文件中的7000替換成7001，並生成redis_7001.conf文件
[root@host1 config]# sed 's/7000/7002/g' redis_7000.conf > redis_7002.conf # 把redis_7000.conf文件中的7000替換成7002，並生成redis_7002.conf文件
[root@host1 config]# redis-server /opt/config/redis_7000.conf # 指定配置文件，啟動redis server節點
[root@host1 config]# redis-server /opt/config/redis_7001.conf # 指定配置文件，啟動redis server節點
[root@host1 config]# redis-server /opt/config/redis_7002.conf # 指定配置文件，啟動redis server節點
[root@host1 config]# ps aux | grep redis-server # 查看redis-server進程運行情況
root 2444 0.1 0.5 142904 5328 ? Ssl 19:38 0:00 redis-server *:7000 [cluster]
root 2475 0.0 0.5 142904 5328 ? Ssl 19:39 0:00 redis-server *:7001 [cluster]
root 2479 0.2 0.5 142904 5328 ? Ssl 19:39 0:00 redis-server *:7002 [cluster]
root 2483 0.0 0.0 112648 964 pts/0 R+ 19:39 0:00 grep --color=auto redis-server
3.2 在192.168.81.101虛擬機上進行第一步的操作，生成三個配置文件,並啟動Redis server
[root@mysql config]# redis-server /opt/config/redis_7000.conf # 指定配置文件，啟動redis server節點
[root@mysql config]# redis-server /opt/config/redis_7001.conf # 指定配置文件，啟動redis server節點
[root@mysql config]# redis-server /opt/config/redis_7002.conf # 指定配置文件，啟動redis server節點
[root@mysql config]# ps aux | grep redis-server # 查看redis-server的進程運行情況
root 1704 0.1 0.2 142916 5344 ? Ssl 19:41 0:00 redis-server *:7000 [cluster]
root 1736 0.0 0.2 142916 5344 ? Ssl 19:41 0:00 redis-server *:7001 [cluster]
root 1740 0.0 0.2 142916 5340 ? Ssl 19:42 0:00 redis-server *:7002 [cluster]
3.3 在192.168.81.100虛擬機上查看cluster節點的信息
[root@host1 config]# redis-cli -p 7000
127.0.0.1:7000> set hello world # 向當前節點執行寫入命令，失敗
(error) CLUSTERDOWN Hash slot not served
127.0.0.1:7000> cluster nodes # 查看集群節點信息，只有當前節點的信息，且顯示為主節點
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed :7000 myself,master - 0 0 0 connected
127.0.0.1:7000> cluster info # 查看cluster的信息
cluster_state:fail # 集群為失敗狀態
cluster_slots_assigned:0
cluster_slots_ok:0 # 當前集群中有0個slot(槽)
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:1 # 當前集群中節點個數為1
cluster_size:0
cluster_current_epoch:0
cluster_my_epoch:0
cluster_stats_messages_sent:0
cluster_stats_messages_received:0
127.0.0.1:7000> exit
[root@host1 config]# cd /var/lib/redis/
[root@host1 redis]# ls
dump.rdb nodes-7000.conf nodes-7001.conf nodes-7002.conf
[root@host1 redis]# cat nodes-7000.conf # 查看7000端口上運行的redis-server的run_id與執行cluster nodes命令得到的run_id相同
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed :0 myself,master - 0 0 0 connected
vars currentEpoch 0 lastVoteEpoch 0
3.4 在192.168.81.100上執行meet操作
[root@host1 redis]# redis-cli -p 7000 cluster meet 127.0.0.1 7001 # 通過7000端口的redis server向7001端口的redis server發送meet操作
OK
[root@host1 redis]# redis-cli -p 7000 cluster nodes # 通過7000端口運行的redis server查看cluster的節點信息，已經添加7001端口運行的redis server,且都為master節點
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 myself,master - 0 0 0 connected
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 master - 0 1539719395866 1 connected
[root@host1 redis]# redis-cli -p 7001 cluster nodes # 通過7001端口運行的redis server查看cluster的節點信息，也可以看到7000端口運行的redis server
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 master - 0 1539719408423 0 connected
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 myself,master - 0 0 1 connected
[root@host1 redis]# redis-cli -p 7002 cluster nodes # 通過7002端口的redis server查看cluster的節點信息，7000端口和7001端口運行的redis server都不在其中，因為7002端口運行的redis server沒有meet
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a :7002 myself,master - 0 0 0 connected
[root@host1 redis]# redis-cli -p 7000 cluster meet 127.0.0.1 7002 # 向7002端口運行的redis server發送meet操作
OK
[root@host1 redis]# redis-cli -p 7001 cluster nodes # 7002端口運行的redis server已經添加到集群中了
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 127.0.0.1:7002 master - 0 1539719438785 0 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 master - 0 1539719439689 2 connected
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 myself,master - 0 0 1 connected
[root@host1 redis]# redis-cli -p 7002 cluster nodes
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 master - 0 1539719442308 1 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 master - 0 1539719441301 2 connected
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 127.0.0.1:7002 myself,master - 0 0 0 connected
[root@host1 redis]# redis-cli -p 7000 cluster meet 192.168.81.101 7002 # 向192.168.81.101:7002端口運行的redis server執行meet操作
OK
[root@host1 redis]# redis-cli -p 7000 cluster meet 192.168.81.101 7000 # 向192.168.81.101:7000端口運行的redis server執行meet操作
OK
[root@host1 redis]# redis-cli -p 7000 cluster meet 192.168.81.101 7001 # 向192.168.81.101:7001端口運行的redis server執行meet操作
OK
[root@host1 redis]# redis-cli -p 7000 cluster nodes
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539719546060 5 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 master - 0 1539719548113 3 connected
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 192.168.81.101:7001 master - 0 1539719547106 4 connected
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 master - 0 1539719544042 1 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 myself,master - 0 0 2 connected
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 127.0.0.1:7002 master - 0 1539719545050 0 connected
[root@host1 redis]# redis-cli -p 7002 cluster nodes # 查看集群中的節點信息，發現6個node都已經添加到當前集群中了
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 master - 0 1539719554166 1 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 master - 0 1539719554668 2 connected
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 192.168.81.101:7001 master - 0 1539719555174 4 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 master - 0 1539719556180 3 connected
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 127.0.0.1:7002 myself,master - 0 0 0 connected
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539719557188 5 connected
[root@host1 redis]# redis-cli -p 7002 cluster info # 查看集群相關的信息
cluster_state:fail # 集群狀態為失敗
cluster_slots_assigned:0
cluster_slots_ok:0
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6 # 集群中有6個已知節點
cluster_size:0
cluster_current_epoch:5
cluster_my_epoch:0
cluster_stats_messages_sent:507
cluster_stats_messages_received:507
3.5 在192.168.81.101虛擬機上查看cluster的信息
[root@mysql config]# redis-cli -p 7000 cluster nodes # 查看cluster的節點信息，6個節點的信息都顯示出來，且都為master
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 master - 0 1539690828453 3 connected
45d79e730593df3216a4236a19c21ff601949449 192.168.81.100:7001 master - 0 1539690825432 1 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 192.168.81.100:7000 master - 0 1539690826437 2 connected
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 192.168.81.100:7002 master - 0 1539690827448 0 connected
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 192.168.81.101:7001 master - 0 1539690827950 4 connected
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 myself,master - 0 0 5 connected
[root@mysql config]# redis-cli -p 7001 cluster nodes # 查看cluster的節點信息，6個節點的信息都顯示出來，且都為master
53911425f4479ce4f054b8b714f4700715f0dc64 127.0.0.1:7002 master - 0 1539690840955 3 connected
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539690842968 5 connected
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 192.168.81.101:7001 myself,master - 0 0 4 connected
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 192.168.81.100:7002 master - 0 1539690844979 0 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 192.168.81.100:7000 master - 0 1539690841960 2 connected
45d79e730593df3216a4236a19c21ff601949449 192.168.81.100:7001 master - 0 1539690843977 1 connected
[root@mysql config]# redis-cli -p 7002 cluster nodes # 查看cluster的節點信息，6個節點的信息都顯示出來，且都為master
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 127.0.0.1:7001 master - 0 1539690847798 4 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 myself,master - 0 0 3 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 192.168.81.100:7000 master - 0 1539690846795 2 connected
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 192.168.81.100:7002 master - 0 1539690843775 0 connected
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539690844780 5 connected
45d79e730593df3216a4236a19c21ff601949449 192.168.81.100:7001 master - 0 1539690845786 1 connected
[root@mysql config]# redis-cli -p 7002 cluster info # 查看cluster的信息
cluster_state:fail # 集群狀態為失敗狀態
cluster_slots_assigned:0
cluster_slots_ok:0
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6 # 集群中添加了6個節點
cluster_size:0 # 集群中
cluster_current_epoch:5
cluster_my_epoch:3
cluster_stats_messages_sent:413
cluster_stats_messages_received:413
3.6 在192.168.81.100虛擬機上編寫腳本，完成分配slot
[root@host1 ~]# cd /opt/config/
[root@host1 config]# vi add_slots.sh # 編寫add_slots.sh腳本
#!/bin/bash
start=$1
end=$2
port=$3
for slot in `seq ${start} ${end}`
do
echo "slot:${slot}"
redis-cli -p ${port} cluster addslots ${slot}
done
[root@host1 config]# sh add_slots.sh 0 5461 7000 # 運行add_slots.sh腳本，把0到5461號槽分配給192.168.81.100:7000的redis server節點
slot:0
OK
slot:1
OK
slot:2
OK
slot:3
OK
slot:4
OK
slot:5
OK
...中間省略
slot:5459
OK
slot:5460
OK
slot:5461
OK
[root@host1 config]# redis-cli -p 7000 cluster info # 查看cluster集群的信息
cluster_state:ok # 集群狀態為OK狀態
cluster_slots_assigned:5462 # 集群中已經有5462個數據槽
cluster_slots_ok:5462 # 5462個槽的狀態為0K狀態
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6 # 集群添加了6個節點
cluster_size:1 # 集群的大小為1個
cluster_current_epoch:5
cluster_my_epoch:2
cluster_stats_messages_sent:2237
cluster_stats_messages_received:2237
[root@host1 config]# redis-cli -p 7000 cluster nodes # 查看集群中節點的信息
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539720483326 5 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 master - 0 1539720484336 3 connected
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 192.168.81.101:7001 master - 0 1539720485346 4 connected
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 master - 0 1539720482314 1 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 myself,master - 0 0 2 connected 0-5461 # 192.168.81.100:7000端口運行的redis server已經分配的槽為0到5461號槽，其他節點還沒有分配槽
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 127.0.0.1:7002 master - 0 1539720486351 0 connected
[root@host1 config]# redis-cli -p 7002 cluster nodes
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 master - 0 1539720507768 1 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 master - 0 1539720509782 2 connected 0-5461
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 192.168.81.101:7001 master - 0 1539720510789 4 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 master - 0 1539720508776 3 connected
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 127.0.0.1:7002 myself,master - 0 0 0 connected
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539720511799 5 connected
[root@host1 config]# sh add_slots.sh 5462 10922 7001 # 運行add_slots.sh腳本，把5462號到10922號槽分配給7001端口運行的redis server
[root@host1 config]# sh add_slots.sh 10923 16383 7002 # 運行add_slots.sh腳本，把10923號到16383號槽分配給7002端口運行的redis server
[root@host1 config]# redis-cli -p 7000 cluster nodes # 查看集群的節點信息
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539720810075 5 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 master - 0 1539720807558 3 connected
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 192.168.81.101:7001 master - 0 1539720804033 4 connected
45d79e730593df3216a4236a19c21ff601949449 127.0.0.1:7001 master - 0 1539720809067 1 connected 5462-10922 # 7001端口運行的redis server的槽編號為5462號到10922號槽
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 127.0.0.1:7000 myself,master - 0 0 2 connected 0-5461 # 7000端口運行的redis server的槽編號為0號到5461號槽
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 127.0.0.1:7002 master - 0 1539720808061 0 connected 10923-16383 # 7002端口運行的redis server的槽編號為10922號到16383號槽
[root@host1 config]# redis-cli -p 7000 cluster info # 查看集群的信息
cluster_state:ok # 集群狀態為ok狀態
cluster_slots_assigned:16384 # 集群已經被分配16384個槽
cluster_slots_ok:16384 # 集群中狀態為ok的槽有16384個
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6 # 集群有6個節點
cluster_size:3 # 集群大小為3個
cluster_current_epoch:5
cluster_my_epoch:2
cluster_stats_messages_sent:2950
cluster_stats_messages_received:2950
[root@host1 config]# redis-cli -p 7001 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:1
cluster_stats_messages_sent:3158
cluster_stats_messages_received:3158
[root@host1 config]# redis-cli -p 7002 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_sent:2828
cluster_stats_messages_received:2828
[root@host1 config]# redis-cli -p 7000
127.0.0.1:7000> set hello world # 成功向集群中寫入數據
OK
127.0.0.1:7000> config get cluster* # 獲取集群的配置信息
1) "cluster-node-timeout"
2) "15000"
3) "cluster-migration-barrier"
4) "1"
5) "cluster-slave-validity-factor"
6) "10"
7) "cluster-require-full-coverage"
8) "no"
127.0.0.1:7000> exit
3.7 在192.168.81.101虛擬機上操作
[root@mysql config]# redis-cli -p 7002 cluster nodes # 查看集群的節點信息，都是master
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 127.0.0.1:7001 master - 0 1539693824725 4 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 myself,master - 0 0 3 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 192.168.81.100:7000 master - 0 1539693826743 2 connected 0-5461
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 192.168.81.100:7002 master - 0 1539693829260 0 connected 10923-16383
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 master - 0 1539693830266 5 connected
45d79e730593df3216a4236a19c21ff601949449 192.168.81.100:7001 master - 0 1539693828252 1 connected 5462-10922
[root@mysql config]# redis-cli -p 7000 cluster replicate d20aa403c5d7d9507adcc4ef6132c14f3c9486ed # 使192.168.81.101:7000端口運行的redis server做為192.168.81.100:7000端口運行的redis server的master
OK
[root@mysql config]# redis-cli -p 7001 cluster replicate 45d79e730593df3216a4236a19c21ff601949449
OK
[root@mysql config]# redis-cli -p 7002 cluster replicate e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a
OK
[root@mysql config]# redis-cli -p 7002 cluster nodes # 查看集群的節點信息
bb88f0996503bac3b222b9cc4ec25139ad34ed3a 127.0.0.1:7001 slave 45d79e730593df3216a4236a19c21ff601949449 0 1539693962338 4 connected
53911425f4479ce4f054b8b714f4700715f0dc64 192.168.81.101:7002 myself,slave e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 0 0 3 connected
d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 192.168.81.100:7000 master - 0 1539693958297 2 connected 0-5461
e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a 192.168.81.100:7002 master - 0 1539693960324 0 connected 10923-16383
c96589b19b8ff5d9d286d470b8efff9a540726d8 192.168.81.101:7000 slave d20aa403c5d7d9507adcc4ef6132c14f3c9486ed 0 1539693961329 5 connected
45d79e730593df3216a4236a19c21ff601949449 192.168.81.100:7001 master - 0 1539693963347 1 connected 5462-10922
[root@mysql config]# redis-cli -p 7002 cluster slots # 查看集群的槽與節點的關系
1) 1) (integer) 0
2) (integer) 5461
3) 1) "192.168.81.100"
2) (integer) 7000
3) "d20aa403c5d7d9507adcc4ef6132c14f3c9486ed"
4) 1) "192.168.81.101"
2) (integer) 7000
3) "c96589b19b8ff5d9d286d470b8efff9a540726d8"
2) 1) (integer) 10923
2) (integer) 16383
3) 1) "192.168.81.100"
2) (integer) 7002
3) "e5ea887c98e79ef2b2205d6cc1d7ac5cfe936d9a"
4) 1) "192.168.81.101"
2) (integer) 7002
3) "53911425f4479ce4f054b8b714f4700715f0dc64"
3) 1) (integer) 5462
2) (integer) 10922
3) 1) "192.168.81.100"
2) (integer) 7001
3) "45d79e730593df3216a4236a19c21ff601949449"
4) 1) "127.0.0.1"
2) (integer) 7001
3) "bb88f0996503bac3b222b9cc4ec25139ad34ed3a"
3.8 向集群中寫入數據
[root@host1 config]# redis-cli -c -p 7000
127.0.0.1:7000> set hello world
OK
127.0.0.1:7000> exit
4.集群擴容
4.1 在192.168.81.100虛擬機上生成配置文件，並啟動redis server
[root@host1 config]# ls
add_slots.sh redis_7000.conf redis_7001.conf redis_7002.conf
[root@host1 config]# sed 's/7000/7003/g' redis_7000.conf > redis_7003.conf # 生成配置文件
[root@host1 config]# redis-server /opt/config/redis_7003.conf # 啟動redis-server
[root@host1 config]# ps aux | grep redis-server
root 2553 0.2 0.7 142904 7552 ? Ssl 12:23 0:12 redis-server 0.0.0.0:7000 [cluster]
root 2557 0.2 0.7 142904 7548 ? Ssl 12:23 0:13 redis-server 0.0.0.0:7001 [cluster]
root 2561 0.2 0.7 142904 7556 ? Ssl 12:23 0:13 redis-server 0.0.0.0:7002 [cluster]
root 2596 0.1 0.5 142904 5336 ? Ssl 13:53 0:00 redis-server 0.0.0.0:7003 [cluster]
root 2600 0.0 0.0 112648 964 pts/0 R+ 13:53 0:00 grep --color=auto redis-server
4.2 在192.168.81.101虛擬機上生成配置文件，並啟動redis-server
[root@mysql config]# ls
dump.rdb redis_7000.conf redis_7001.conf redis_7002.conf
[root@mysql config]# sed 's/7000/7003/g' redis_7000.conf > redis_7003.conf # 生成配置文件
[root@mysql config]# ls
dump.rdb redis_7000.conf redis_7001.conf redis_7002.conf redis_7003.conf
[root@mysql config]# redis-server /opt/config/redis_7003.conf # 指定配置文件，啟動redis-server
[root@mysql config]# ps aux | grep redis-server
root 1948 0.2 0.3 142916 7560 ? Ssl 12:21 0:13 redis-server 0.0.0.0:7002 [cluster]
root 1952 0.2 0.3 142916 7560 ? Ssl 12:21 0:12 redis-server 0.0.0.0:7001 [cluster]
root 1964 0.2 0.3 142916 7356 ? Ssl 12:21 0:12 redis-server 0.0.0.0:7000 [cluster]
root 7348 0.0 0.2 142916 5352 ? Ssl 13:53 0:00 redis-server 0.0.0.0:7003 [cluster]
root 7352 0.0 0.0 112664 972 pts/0 R+ 13:53 0:00 grep --color=auto redis-server
4.3 在192.168.81.101虛擬機上執行meet操作，對集群擴容
[root@mysql config]# redis-cli -p 7000 cluster meet 127.0.0.1 7003 # 對新添加的redis-server執行meet操作
OK
[root@mysql config]# redis-cli -p 7000 cluster meet 192.168.81.100 7003
OK
[root@mysql config]# redis-cli -p 7000 cluster nodes # 查看集群的節點信息
6f369311b0ca4c503f337c4bb23424eed3eeb188 127.0.0.1:7002 slave cb8c114d44d289687798508232d31e0a065fdab5 0 1539755696566 4 connected
ac153a3c1fb10d9d502b153c32dec65c85b2f97c 192.168.81.100:7002 slave fceba6001b95e2169ddd6622436b213324fe8f77 0 1539755699589 6 connected
71f5695dc1f4322c8ea9066d1b3cd8bb0ab7a329 192.168.81.100:7001 slave cf74b2d9570665b74525802462c74cf2e072ef99 0 1539755694553 5 connected
27266dcfd098dfe2a42361d6ab59edf8fb9f5413 192.168.81.100:7003 master - 0 1539755697570 7 connected # 已經添加到集群中了
cb8c114d44d289687798508232d31e0a065fdab5 192.168.81.100:7000 master - 0 1539755694553 4 connected 5461-10922
fceba6001b95e2169ddd6622436b213324fe8f77 127.0.0.1:7001 master - 0 1539755698572 2 connected 10923-16383
cf74b2d9570665b74525802462c74cf2e072ef99 192.168.81.101:7000 myself,master - 0 0 1 connected 0-5460
2ff22acb1e006b9881abc80238e15b4e3fcefbef 127.0.0.1:7003 master - 0 1539755695560 0 connected # 已經添加到集群中了
[root@mysql config]# redis-cli -p 7000 cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:8
cluster_size:3
cluster_current_epoch:7
cluster_my_epoch:1
cluster_stats_messages_sent:11829
cluster_stats_messages_received:11829
[root@mysql config]# redis-cli -p 7003 cluster replicate 27266dcfd098dfe2a42361d6ab59edf8fb9f5413 # 綁定主從關系
OK
[root@mysql config]# redis-cli -p 7003 cluster nodes
27266dcfd098dfe2a42361d6ab59edf8fb9f5413 192.168.81.100:7003 master - 0 1539756040013 7 connected
2ff22acb1e006b9881abc80238e15b4e3fcefbef 192.168.81.101:7003 myself,slave 27266dcfd098dfe2a42361d6ab59edf8fb9f5413 0 0 0 connected
cb8c114d44d289687798508232d31e0a065fdab5 192.168.81.100:7000 master - 0 1539756035980 4 connected 5461-10922
ac153a3c1fb10d9d502b153c32dec65c85b2f97c 192.168.81.100:7002 slave fceba6001b95e2169ddd6622436b213324fe8f77 0 1539756037488 2 connected
cf74b2d9570665b74525802462c74cf2e072ef99 127.0.0.1:7000 master - 0 1539756040516 1 connected 0-5460
6f369311b0ca4c503f337c4bb23424eed3eeb188 127.0.0.1:7002 slave cb8c114d44d289687798508232d31e0a065fdab5 0 1539756038998 4 connected
fceba6001b95e2169ddd6622436b213324fe8f77 127.0.0.1:7001 master - 0 1539756041017 2 connected 10923-16383
71f5695dc1f4322c8ea9066d1b3cd8bb0ab7a329 192.168.81.100:7001 slave cf74b2d9570665b74525802462c74cf2e072ef99 1539756042024 1539756037992 1 connected
5.優點
可以深入理解Redis Cluster架構
6.缺點
容易出差錯，生產環境中不建議使用
