集群规划：
三台服务器各部署一个主节点、一个从节点，同一台服务器上不是直接主从关系。
服务器
角色
ip:端口
node1
master1/slave2
192.168.146.199:6379/192.168.146.199:6380
node2
master2/slave3
192.168.146.200:6379/192.168.146.200:6380
node3
master3/slave1
192.168.146.201:6379/192.168.146.201:6380
命令行开头为#表示在所有主机上操作，命令行开后为具体主机名则表示在该主机上操作。
1、三台服务器基础设置
设置主机名：
# hostnamectl --static set-hostname node1/node2/node3
配置映射：
1# vi /etc/hosts 2192.168.146.199 node1 3192.168.146.200 node2 4192.168.146.201 node3
时区调整，时间校准：
1# date -R 2# timedatectl set-timezone Asia/Shanghai 3# yum -y install ntp 4# ntpdate ntp1.aliyun.com
安装wget：
$ yum install -y wget
关闭selinux：
1# vi /etc/sysconfig/selinux 2SELINUX=disabled
重启服务器并验证：
1# getenforce 2Disabled
# 设置防火墙
1# firewall-cmd --zone=public --add-port=6379/tcp --permanent 2success 3# firewall-cmd --zone=public --add-port=6380/tcp --permanent 4success 5# firewall-cmd --zone=public --add-port=16379/tcp --permanent 6success 7# firewall-cmd --zone=public --add-port=16380/tcp --permanent 8success 9# firewall-cmd --permanent --zone=public --list-ports 106379/tcp 6380/tcp 16379/tcp 16380/tcp 11# firewall-cmd --reload 12success
2、gcc版本问题避免
1# yum -y install gcc tcl 2# yum -y install centos-release-scl 3# yum -y install devtoolset-9-gcc devtoolset-9-gcc-c++ devtoolset-9-binutils
查看gcc版本：
1# gcc -v 2 3scl只是临时启用，退出shell后会恢复原系统gcc版本： 4# scl enable devtoolset-9 bash 5 6如下命令表示永久启用： 7# echo "source /opt/rh/devtoolset-9/enable" >> /etc/profile 8 9查看gcc版本： 10# gcc -v
3、redis安装
1# cd /opt 2# wget http://download.redis.io/releases/redis-6.0.8.tar.gz 3# tar zxvf redis-6.0.8.tar.gz 4# cd redis-6.0.8 5# make MALLOC=libc 6# make test
将执行文件弄到环境变量所在目录：
# make install
临时启动测试：
1# redis-server 2# ps -ef | grep redis 3root 17830 8648 0 23:14 pts/0 00:00:00 redis-server *:6379 4# redis-cli 5127.0.0.1:6379> set foo bar 6OK 7127.0.0.1:6379> get foo 8"bar"
创建日志文件存放目录：
# mkdir -p /var/log/redis/
创建工作目录：
1# mkdir -p /var/lib/redis/6379 2# mkdir -p /var/lib/redis/6380
4、修改redis配置文件
节点1上修改配置文件：
1[root@node1 ~]# cd /opt/redis-6.0.8 2[root@node1 redis-6.0.8]# mkdir cluster 3[root@node1 redis-6.0.8]# cp -i redis.conf cluster/redis-6379.conf 4[root@node1 redis-6.0.8]# vi cluster/redis-6379.conf 5port 6379 6daemonize yes 7dir /var/lib/redis/6379 8logfile "/var/log/redis/redis-6379.log" 9cluster-enabled yes 10cluster-config-file nodes-6379.conf 11cluster-node-timeout 15000 12cluster-require-full-coverage no 13appendonly yes 14 15#port 6379 #端口 16#daemonize yes #守护进程 17#dir /var/lib/redis/6379 #数据存储目录 18#logfile "/var/log/redis/redis-6379.log" #日志存储目录 19#cluster-enabled yes #开启集群 20#cluster-config-file nodes-6379.conf 21#cluster-node-timeout 15000 22#cluster-require-full-coverage no 23#appendonly yes #持久化
将节点1服务器配置文件拷贝到节点2、节点3：
1[root@node1 redis-6.0.8]# scp -r /opt/redis-6.0.8/cluster/ root@192.168.146.200:/opt/redis-6.0.8/ 2[root@node1 redis-6.0.8]# scp -r /opt/redis-6.0.8/cluster/ root@192.168.146.201:/opt/redis-6.0.8/
# 修改节点服务器监听IP地址：
1[root@node1 opt]# cd /opt/redis-6.0.8 2[root@node1 opt]# sed -i 's/127.0.0.1/192.168.146.199/g' cluster/redis-6379.conf 3 4[root@node2 opt]# cd /opt/redis-6.0.8 5[root@node2 opt]# sed -i 's/127.0.0.1/192.168.146.200/g' cluster/redis-6379.conf 6 7[root@node3 opt]# cd /opt/redis-6.0.8 8[root@node3 opt]# sed -i 's/127.0.0.1/192.168.146.201/g' cluster/redis-6379.conf
根据7379生成6380配置文件：
# sed 's/6379/6380/g' cluster/redis-6379.conf > cluster/redis-6380.conf
5、制作redis启动配置文件
[root@node1 cluster]# cd /opt/redis-6.0.8
制作启动脚本：
1[root@node1 redis-6.0.8]# vi cluster_start.sh 2redis-server cluster/redis-6379.conf 3redis-server cluster/redis-6380.conf 4[root@node1 redis-6.0.8]# chmod +x cluster_start.sh
制作关闭脚本：
1[root@node1 redis-6.0.8]# vi cluster_shutdown.sh 2pgrep redis-server | xargs -exec kill -9 3[root@node1 redis-6.0.8]# chmod +x cluster_shutdown.sh
将节点1服务器启动关闭脚本拷贝到节点2、节点3：
1[root@node1 redis-6.0.8]# scp -r /opt/redis-6.0.8/cluster_*.sh root@192.168.146.200:/opt/redis-6.0.8/ 2[root@node1 redis-6.0.8]# scp -r /opt/redis-6.0.8/cluster_*.sh root@192.168.146.201:/opt/redis-6.0.8/
启动redis：
1# ./cluster_start.sh 2# ps -ef|grep redis 3root 26731 1 0 01:23 ? 00:00:00 redis-server 192.168.146.199:6379 [cluster] 4root 26736 1 0 01:23 ? 00:00:00 redis-server 192.168.146.199:6380 [cluster] 5root 26741 8648 0 01:23 pts/0 00:00:00 grep --color=auto redis
关闭redis：
# ./cluster_shutdown.sh
6、创建集群
创建集群，--cluster-replicas 1代表3主3从，前3个代表3个master，后3个代表3个slave。通过该方式创建的带有从节点的机器不能够自己手动指定主节点
1[root@node1 redis-6.0.8]# redis-cli --cluster create 192.168.146.199:6379 192.168.146.200:6379 192.168.146.201:6379 192.168.146.199:6380 192.168.146.200:6380 192.168.146.201:6380 --cluster-replicas 1 2>>> Performing hash slots allocation on 6 nodes... 3Master[0] -> Slots 0 - 5460 4Master[1] -> Slots 5461 - 10922 5Master[2] -> Slots 10923 - 16383 6Adding replica 192.168.146.200:6380 to 192.168.146.199:6379 7Adding replica 192.168.146.201:6380 to 192.168.146.200:6379 8Adding replica 192.168.146.199:6380 to 192.168.146.201:6379 9M: 7a0af6d896222c60b582c8ecb16d1369a5ef33b4 192.168.146.199:6379 10 slots:[0-5460] (5461 slots) master 11M: 825e26272e82f4900f2b99bb05cc8efa87f2c238 192.168.146.200:6379 12 slots:[5461-10922] (5462 slots) master 13M: e52b4a755ab35381931ba89cf0399ac2657c0d93 192.168.146.201:6379 14 slots:[10923-16383] (5461 slots) master 15S: caed0e5b336cb31d6d6b29874170075a21e6923b 192.168.146.199:6380 16 replicates e52b4a755ab35381931ba89cf0399ac2657c0d93 17S: c155299d628e705565915cec624faf67946556a5 192.168.146.200:6380 18 replicates 7a0af6d896222c60b582c8ecb16d1369a5ef33b4 19S: d9bca2b5cabb426aa2e296e6696e60e35ef4bebe 192.168.146.201:6380 20 replicates 825e26272e82f4900f2b99bb05cc8efa87f2c238 21Can I set the above configuration? (type 'yes' to accept): yes 22>>> Nodes configuration updated 23>>> Assign a different config epoch to each node 24>>> Sending CLUSTER MEET messages to join the cluster 25Waiting for the cluster to join 26. 27>>> Performing Cluster Check (using node 192.168.146.199:6379) 28M: 7a0af6d896222c60b582c8ecb16d1369a5ef33b4 192.168.146.199:6379 29 slots:[0-5460] (5461 slots) master 30 1 additional replica(s) 31S: c155299d628e705565915cec624faf67946556a5 192.168.146.200:6380 32 slots: (0 slots) slave 33 replicates 7a0af6d896222c60b582c8ecb16d1369a5ef33b4 34M: 825e26272e82f4900f2b99bb05cc8efa87f2c238 192.168.146.200:6379 35 slots:[5461-10922] (5462 slots) master 36 1 additional replica(s) 37S: d9bca2b5cabb426aa2e296e6696e60e35ef4bebe 192.168.146.201:6380 38 slots: (0 slots) slave 39 replicates 825e26272e82f4900f2b99bb05cc8efa87f2c238 40M: e52b4a755ab35381931ba89cf0399ac2657c0d93 192.168.146.201:6379 41 slots:[10923-16383] (5461 slots) master 42 1 additional replica(s) 43S: caed0e5b336cb31d6d6b29874170075a21e6923b 192.168.146.199:6380 44 slots: (0 slots) slave 45 replicates e52b4a755ab35381931ba89cf0399ac2657c0d93 46[OK] All nodes agree about slots configuration. 47>>> Check for open slots... 48>>> Check slots coverage... 49[OK] All 16384 slots covered. 50备注：注意看M和S，对照下集群角色表
7、查看集群信息
查看集群状态：
1[root@node1 redis-6.0.8]# redis-cli -c -h 192.168.146.199 -p 6379 cluster info 2cluster_state:ok 3cluster_slots_assigned:16384 4cluster_slots_ok:16384 5cluster_slots_pfail:0 6cluster_slots_fail:0 7cluster_known_nodes:6 8cluster_size:3 9cluster_current_epoch:6 10cluster_my_epoch:1 11cluster_stats_messages_ping_sent:482 12cluster_stats_messages_pong_sent:488 13cluster_stats_messages_sent:970 14cluster_stats_messages_ping_received:483 15cluster_stats_messages_pong_received:482 16cluster_stats_messages_meet_received:5 17cluster_stats_messages_received:970
查看集群节点信息：
1[root@node1 redis-6.0.8]# redis-cli -c -h 192.168.146.199 -p 6379 cluster nodes 27a0af6d896222c60b582c8ecb16d1369a5ef33b4 192.168.146.199:6379@16379 myself,master - 0 1600191841000 1 connected 0-5460 3c155299d628e705565915cec624faf67946556a5 192.168.146.200:6380@16380 slave 7a0af6d896222c60b582c8ecb16d1369a5ef33b4 0 1600191840159 1 connected 4825e26272e82f4900f2b99bb05cc8efa87f2c238 192.168.146.200:6379@16379 master - 0 1600191842184 2 connected 5461-10922 5d9bca2b5cabb426aa2e296e6696e60e35ef4bebe 192.168.146.201:6380@16380 slave 825e26272e82f4900f2b99bb05cc8efa87f2c238 0 1600191843194 2 connected 6e52b4a755ab35381931ba89cf0399ac2657c0d93 192.168.146.201:6379@16379 master - 0 1600191842000 3 connected 10923-16383 7caed0e5b336cb31d6d6b29874170075a21e6923b 192.168.146.199:6380@16380 slave e52b4a755ab35381931ba89cf0399ac2657c0d93 0 1600191844207 3 connected
8、测试用例
1[root@node1 redis-6.0.8]# redis-cli -c -h 192.168.146.199 -p 6379 2192.168.146.199:6379> set name node1 3-> Redirected to slot [5798] located at 192.168.146.200:6379 4OK 5 6[root@node2 redis-6.0.8]# redis-cli -c -h 192.168.146.200 -p 6379 7192.168.146.200:6379> get name 8"node1" 9 10root@node3 redis-6.0.8]# redis-cli -c -h 192.168.146.201 -p 6379 11192.168.146.201:6379> get name 12-> Redirected to slot [5798] located at 192.168.146.200:6379 13"node1" 14192.168.146.201:6379> del name 15-> Redirected to slot [5798] located at 192.168.146.200:6379 16(integer) 1 17192.168.146.201:6379> get name 18-> Redirected to slot [5798] located at 192.168.146.200:6379 19(nil)
9、目录说明
1# cd /var/lib/redis/6379 2# ll 3total 8 4-rw-r--r-- 1 root root 0 Sep 16 01:21 appendonly.aof 5-rw-r--r-- 1 root root 175 Sep 16 01:35 dump.rdb 6-rw-r--r-- 1 root root 817 Sep 16 01:36 nodes-6379.conf 7 8# cd /var/lib/redis/6380 9# ll 10total 12 11-rw-r--r-- 1 root root 149 Sep 16 01:52 appendonly.aof 12-rw-r--r-- 1 root root 191 Sep 16 01:52 dump.rdb 13-rw-r--r-- 1 root root 817 Sep 16 01:36 nodes-6380.conf