文章目錄

• • • • • 一、節點分布總覽
        • 二、軟件配置初始化
        • 三、集群配置修改
        • • 3.1. redis-7002.conf
          • 3.2. redis-7003.conf
          • 3.3. redis-8001.conf
          • 3.4. redis-8002.conf
          • 3.5. redis-8003.conf
          • 3.6. redis啟動
        • 四、 節點握手
        • • 4.1. 節點握手
          • 4.2. 操作日志如下：
        • 五、槽位分配和配置主從
        • • 5.1. 槽位分配
          • 5.2. 主從復制分配
          • 5.3. 集群驗證

Redis 分布式集群能解決的問題集群 概念

解決現有系統單節點并發壓力和物理上限問題	通過添加服務器的數量，提供相同的服務，從而讓服務器達到一個穩定、高效的狀態

一、節點分布總覽

演示案例
3主3從 橫向擴展

服務器端口節點說明

192.168.0.114	7001	master
192.168.0.114	7002	master
192.168.0.114	7003	master
192.168.0.114	8001	slave
192.168.0.114	8002	slave
192.168.0.114	8003	slave

二、軟件配置初始化

• 下載

wget https://download.redis.io/releases/redis-6.2.6.tar.gz

• 解壓

cd /app tar -zxvf redis-6.2.6.tar.gz

• 編譯安裝

cd redis-6.2.6/ make install

• 配置抽離

mkdir /app/redis-cluster/ cp /app/redis-6.2.6/redis.conf /app/redis-cluster/

• 編輯配置

vim /app/redis-cluster/redis.conf

• 修改配置7處：
  bind 127.0.0.1 改為 bind 0.0.0.0
  port 6379 改為 port 7001
  daemonize no 改為 daemonize yes
  pidfile /var/run/redis_6379.pid 改為 pidfile /var/run/redis_7001.pid
  注釋打開cluster-enabled yes
  注釋打開 cluster-node-timeout 15000
  注釋打開 nodes-6379.conf 改為nodes-7001.conf

• 集群配置分配

將/app/redis-cluster/redis.conf復制6份并重命名

cd app/redis-cluster/ cp redis.conf redis-7001.conf cp redis.conf redis-7002.conf cp redis.conf redis-7003.conf cp redis.conf redis-8001.conf cp redis.conf redis-8002.conf cp redis.conf redis-8003.conf

三、集群配置修改

分別修改redis-7002.conf、redis-7003.conf、redis-8001.conf、redis-8002.conf、redis-8003.conf

3.1. redis-7002.conf

vim redis-7002.conf

port 把7001 修改為7002
將7001.pid 修改為 7002.pid
將nodes-7001.conf 修改為 nodes-7002.conf

3.2. redis-7003.conf

vim redis-7003.conf

port 把7001 修改為7003
將7001.pid 修改為 7003.pid
將nodes-7001.conf 修改為 nodes-7003.conf

3.3. redis-8001.conf

vim redis-8001.conf

port 把7001 修改為8001
將7001.pid 修改為 8001.pid
將nodes-7001.conf 修改為 nodes-8001.conf

3.4. redis-8002.conf

vim redis-8002.conf

92行 port 把7001 修改為8002
將7001.pid 修改為 8002.pid
將nodes-7001.conf 修改為 nodes-8002.conf

3.5. redis-8003.conf

vim redis-8003.conf

port 把7001 修改為8003
將7001.pid 修改為 8003.pid
將nodes-7001.conf 修改為 nodes-8003.conf

3.6. redis啟動

/app/redis-6.2.6/src/redis-server /app/redis-cluster/redis-7001.conf /app/redis-6.2.6/src/redis-server /app/redis-cluster/redis-7002.conf /app/redis-6.2.6/src/redis-server /app/redis-cluster/redis-7003.conf /app/redis-6.2.6/src/redis-server /app/redis-cluster/redis-8001.conf /app/redis-6.2.6/src/redis-server /app/redis-cluster/redis-8002.conf /app/redis-6.2.6/src/redis-server /app/redis-cluster/redis-8003.conf

查看進程：

ps -ef |grep redis

操作日志如下：

[root@localhost ~]# ps -ef |grep redis root 7770 1 0 11:29 ? 00:00:00 /app/redis-6.2.6/src/redis-server 0.0.0.0:7001 [cluster] root 7775 1 0 11:29 ? 00:00:00 /app/redis-6.2.6/src/redis-server 0.0.0.0:7002 [cluster] root 7780 1 0 11:29 ? 00:00:00 /app/redis-6.2.6/src/redis-server 0.0.0.0:7003 [cluster] root 7785 1 0 11:29 ? 00:00:00 /app/redis-6.2.6/src/redis-server 0.0.0.0:8001 [cluster] root 7790 1 0 11:29 ? 00:00:00 /app/redis-6.2.6/src/redis-server 0.0.0.0:8002 [cluster] root 7795 1 0 11:29 ? 00:00:00 /app/redis-6.2.6/src/redis-server 0.0.0.0:8003 [cluster] root 7800 7404 0 11:29 pts/1 00:00:00 grep --color=auto redis [root@localhost ~]#

四、 節點握手

上面僅僅是搭建了集群，6個節點之間還沒有關系，下面通過 節點握手讓集群各節點之間，發生關系。

4.1. 節點握手

7001節點，依次執行（一條一條復制粘貼）以下命令：

/app/redis-6.2.6/src/redis-cli -h localhost -p 7001 cluster meet 192.168.0.114 7002 cluster meet 192.168.0.114 7003 cluster meet 192.168.0.114 8001 cluster meet 192.168.0.114 8002 cluster meet 192.168.0.114 8003

4.2. 操作日志如下：

[root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 7001 localhost:7001> cluster meet 192.168.0.114 7002 OK localhost:7001> cluster meet 192.168.0.114 7003 OK localhost:7001> cluster meet 192.168.0.114 8001 OK localhost:7001> cluster meet 192.168.0.114 8002 OK localhost:7001> cluster meet 192.168.0.114 8003 OK localhost:7001>

五、槽位分配和配置主從

5.1. 槽位分配

/app/redis-6.2.6/src/redis-cli -h localhost -p 7001 cluster addslots {0..5461} /app/redis-6.2.6/src/redis-cli -h localhost -p 7002 cluster addslots {5462..10922} /app/redis-6.2.6/src/redis-cli -h localhost -p 7003 cluster addslots {10923..16383} 操作日志： [root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 7001 cluster addslots {0..5461} OK [root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 7002 cluster addslots {5462..10922} OK [root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 7003 cluster addslots {10923..16383} OK [root@localhost ~]# 登錄7001節點 /app/redis-6.2.6/src/redis-cli -h localhost -p 7001 查看集群信息:cluster info 查看節點信息:cluster nodes操作日志： [root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 7001 localhost: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:0 cluster_stats_messages_ping_sent:278 cluster_stats_messages_pong_sent:298 cluster_stats_messages_meet_sent:5 cluster_stats_messages_sent:581 cluster_stats_messages_ping_received:298 cluster_stats_messages_pong_received:283 cluster_stats_messages_received:581 localhost:7001> cluster nodes c1526c666b10d8e21858121be70ad74e391c9b7c 192.168.0.114:8002@18002 master - 0 1587267512220 4 connected f990f845ed898dea7b7f8f39befd4f0dc247988a 192.168.0.114:8003@18003 master - 0 1587267510000 5 connected fd35850bf465cb53b0ffc8f843078c171d14583d 192.168.0.114:7001@17001 myself,master - 0 1587267510000 0 connected 0-5461 3523d3510e7a551929729798f5ea0e9b65d85eea 192.168.0.114:7003@17003 master - 0 1587267511212 2 connected 10923-16383 faaa97d6fc1f163e9eb2549c77b4f6f3c68bc025 192.168.0.114:8001@18001 master - 0 1587267511000 3 connected 72e1d44ffa3b20f17ba6abb3aa8df3a9752e00cc 192.168.0.114:7002@17002 master - 0 1587267512000 1 connected 5462-10922 localhost:7001>注：目前都是master，節點信息等會要用，這個窗口先不要關閉， 在新開一個窗口，進行下一步操作

5.2. 主從復制分配

復制原則：8001復制7001、8001復制7001、8003復制7003

/app/redis-6.2.6/src/redis-cli -h localhost -p 8001 cluster replicate fd35850bf465cb53b0ffc8f843078c171d14583d /app/redis-6.2.6/src/redis-cli -h localhost -p 8002 cluster replicate 72e1d44ffa3b20f17ba6abb3aa8df3a9752e00cc /app/redis-6.2.6/src/redis-cli -h localhost -p 8003 cluster replicate 3523d3510e7a551929729798f5ea0e9b65d85eea

操作日志如下：

[root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 8001 cluster replicate fd35850bf465cb53b0ffc8f843078c171d14583d localhost -p 8003 cluster replicate 3523d3510e7a551929729798f5ea0e9b65d85eeaOK [root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 8002 cluster replicate 72e1d44ffa3b20f17ba6abb3aa8df3a9752e00cc OK [root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 8003 cluster replicate 3523d3510e7a551929729798f5ea0e9b65d85eea OK [root@localhost ~]#

5.3. 集群驗證

登錄7001節點

/app/redis-6.2.6/src/redis-cli -h localhost -p 7001

查看集群信息:cluster info
查看節點信息:cluster nodes

注：目前3主3從 當主節點掛掉之后，從節點自動上位
操作日志如下：

[root@localhost ~]# /app/redis-6.2.6/src/redis-cli -h localhost -p 7001 localhost: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:0 cluster_stats_messages_ping_sent:692 cluster_stats_messages_pong_sent:734 cluster_stats_messages_meet_sent:5 cluster_stats_messages_sent:1431 cluster_stats_messages_ping_received:734 cluster_stats_messages_pong_received:697 cluster_stats_messages_received:1431 localhost:7001> cluster nodes c1526c666b10d8e21858121be70ad74e391c9b7c 192.168.0.114:8002@18002 slave 72e1d44ffa3b20f17ba6abb3aa8df3a9752e00cc 0 1587267912538 4 connected f990f845ed898dea7b7f8f39befd4f0dc247988a 192.168.0.114:8003@18003 slave 3523d3510e7a551929729798f5ea0e9b65d85eea 0 1587267911000 5 connected fd35850bf465cb53b0ffc8f843078c171d14583d 192.168.0.114:7001@17001 myself,master - 0 1587267909000 0 connected 0-5461 3523d3510e7a551929729798f5ea0e9b65d85eea 192.168.0.114:7003@17003 master - 0 1587267913546 2 connected 10923-16383 faaa97d6fc1f163e9eb2549c77b4f6f3c68bc025 192.168.0.114:8001@18001 slave fd35850bf465cb53b0ffc8f843078c171d14583d 0 1587267910000 3 connected 72e1d44ffa3b20f17ba6abb3aa8df3a9752e00cc 192.168.0.114:7002@17002 master - 0 1587267912000 1 connected 5462-10922 localhost:7001>

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