CentOS7.6搭建redis4.0.1 cluster集群，带密码
1. 操作系统信息：
$ uname -a Linux iZbp11d57wmumnwuihb2czZ 3.10.0-957.5.1.el7.x86_64 #1 SMP Fri Feb 1 14:54:57 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux $ cat /proc/version Linux version 3.10.0-957.5.1.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Fri Feb 1 14:54:57 UTC 2019 $ cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core)
三台ECS机器：172.16.214.160, 172.16.214.161, 172.16.214.163
2. 安裝 GCC 编译工具
$ yum install -y gcc g++ gcc-c++ make
升级所有的包，防止出现版本过久不兼容问题
$ yum -y update
关闭防火墙 节点之前需要开放指定端口
systemctl stop firewalld.service
3.1. 安装redis，下载，解压，编译安装
cd /opt $ wget http://download.redis.io/releases/redis-4.0.1.tar.gz $ tar xzf redis-4.0.1.tar.gz $ cd redis-4.0.1 $ make
如果因为上次编译失败，有残留的文件
$ make distclean
172.16.214.160机器上创建redis目录
$ mkdir /opt/redis-4.0.1/redis-cluster $ cd /opt/redis-4.0.1/redis-cluster $ mkdir 7000 7001 7002
172.16.214.161机器上创建redis目录
$ mkdir /opt/redis-4.0.1/redis-cluster $ cd /opt/redis-4.0.1/redis-cluster $ mkdir 7003 7004 7005
172.16.214.163机器上创建redis目录
$ mkdir /opt/redis-4.0.1/redis-cluster $ cd /opt/redis-4.0.1/redis-cluster $ mkdir 7006 7007 7008
每个目录下创建一个redis.conf文件，内容如下（不同的端口和ip需要设置做修改）
#端口号 port 7000 #默认ip为127.0.0.1，需要改为其他节点机器可访问的ip，否则创建集群时无法访问对应的端口，无法创建集群 bind 172.16.214.160 #redis后台运行 daemonize yes
#访问密码
masterauth passwd123
requirepass passwd123
#pidfile文件 pidfile /var/run/redis_7000.pid #开启集群 cluster-enabled yes #集群的配置，配置文件首次启动自动生成 cluster-config-file nodes_7000.conf #请求超时，默认15秒，可自行设置 cluster-node-timeout 15000 #aof日志开启，有需要就开启，它会每次写操作都记录一条日志 appendonly yes
安装ruby (只需要在其中一台上安装)
$ yum -y install ruby ruby-devel rubygems rpm-build $ gem install redis
Fetching: redis-4.1.0.gem (100%)
ERROR: Error installing redis:
redis requires Ruby version >= 2.2.2.
这一步有可能会出错，原因是ruby版本太低，解决办法安装高版本ruby
$ yum install curl $ gpg2 --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB $ curl -L get.rvm.io | bash -s stable $ find / -name rvm -print /usr/local/rvm /usr/local/rvm/bin/rvm /usr/local/rvm/scripts/rvm /usr/local/rvm/lib/rvm /usr/local/rvm/src/rvm /usr/local/rvm/src/rvm/bin/rvm /usr/local/rvm/src/rvm/scripts/rvm /usr/local/rvm/src/rvm/lib/rvm $ source /usr/local/rvm/scripts/rvm $ rvm list known $ rvm install 2.3.8 $ rvm use 2.3.8 $ rvm use 2.3.8 --default $ ruby --version $ rvm remove 2.0.0 $ gem install redis
设置ruby访问的密码
$ cd /usr/local/rvm/gems/ruby-2.3.8/gems/redis-4.1.1/lib/redis/ $ vim client.rb
将“:password”后的内容设置为你的密码, 保存退出
3.2 创建用户并设置密码，并切换到该用户身份, 修改redis目录所有权
$ useradd admin $ passwd admin
$ chown -R admin:admin /opt/redis-4.0.1
$ su admin
4. 为了安全，用admin用户身份启动集群
#第一台机器上执行 3个节点 $ for((i=0;i<=2;i++)); do /opt/redis-4.0.1/src/redis-server /opt/redis-4.0.1/redis-cluster/700$i/redis.conf; done #第二台机器上执行 3个节点 $ for((i=3;i<=5;i++)); do /opt/redis-4.0.1/src/redis-server /opt/redis-4.0.1/redis-cluster/700$i/redis.conf; done #第三台机器上执行 3个节点 $ for((i=6;i<=8;i++)); do /opt/redis-4.0.1/src/redis-server /opt/redis-4.0.1/redis-cluster/700$i/redis.conf; done
检查各 Redis 各个节点启动情况
$ ps -ef | grep redis //redis是否启动成功 $ netstat -tnlp | grep redis //监听redis端口
创建集群
$ /opt/redis-4.0.1/src/redis-trib.rb create --replicas 1 172.16.214.160:7000 172.16.214.160:7001 172.16.214.160:7002 172.16.214.161:7003 172.16.214.161:7004 172.16.214.161:7005 172.16.214.163:7006 172.16.214.163:7007 172.16.214.163:7008
>>> Creating cluster
>>> Performing hash slots allocation on 9 nodes...
Using 4 masters:
172.16.214.160:7000
172.16.214.161:7003
172.16.214.163:7006
172.16.214.160:7001
Adding replica 172.16.214.161:7004 to 172.16.214.160:7000
Adding replica 172.16.214.163:7007 to 172.16.214.161:7003
Adding replica 172.16.214.160:7002 to 172.16.214.163:7006
Adding replica 172.16.214.161:7005 to 172.16.214.160:7001
Adding replica 172.16.214.163:7008 to 172.16.214.160:7000
M: 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf 172.16.214.160:7000
slots:0-4095 (4096 slots) master
M: 44c81c15b01d992cb9ede4ad35477ec853d70723 172.16.214.160:7001
slots:12288-16383 (4096 slots) master
S: 38f03c27af39723e1828eb62d1775c4b6e2c3638 172.16.214.160:7002
replicates f1abb62a8c9b448ea14db421bdfe3f1d8075189c
M: 987965baf505a9aa43e50e46c76189c51a8f17ec 172.16.214.161:7003
slots:4096-8191 (4096 slots) master
S: 6555292fed9c5d52fcf5b983c441aff6f96923d5 172.16.214.161:7004
replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
S: 2b5ba254a0405d4efde4c459867b15176f79244a 172.16.214.161:7005
replicates 44c81c15b01d992cb9ede4ad35477ec853d70723
M: f1abb62a8c9b448ea14db421bdfe3f1d8075189c 172.16.214.163:7006
slots:8192-12287 (4096 slots) master
S: eb4067373d36d8a8df07951f92794e67a6aac022 172.16.214.163:7007
replicates 987965baf505a9aa43e50e46c76189c51a8f17ec
S: 2919e041dd3d1daf176d6800dcd262f4e727f366 172.16.214.163:7008
replicates 7c622ac191edd40dd61d9b79b27f6f69d02a5bbf
Can I set the above configuration? (type 'yes' to accept): yes
输入yes，然后回车
如何关闭集群：
$ pkill redis
或者逐个关闭
$ for((i=0;i<=2;i++)); do /opt/redis-4.0.1/src/redis-cli -c -h 172.16.214.160 -p 700$i -a passwd123 shutdown; done $ for((i=3;i<=5;i++)); do /opt/redis-4.0.1/src/redis-cli -c -h 172.16.214.161 -p 700$i -a passwd123 shutdown; done $ for((i=6;i<=8;i++)); do /opt/redis-4.0.1/src/redis-cli -c -h 172.16.214.163 -p 700$i -a passwd123 shutdown; done
5.集群验证
参数 -C 可连接到集群，因为 redis.conf 将 bind 改为了ip地址，所以 -h 参数不可以省略，-p 参数为端口号
$ /opt/redis-4.0.1/src/redis-cli -h 172.16.214.160 -c -p 7000 -a passwd123 172.16.214.160:7000> set name justfortest -> Redirected to slot [5798] located at 172.16.214.161:7003 OK 172.16.214.161:7003> get name "justfortest" 172.16.214.161:7003>
发现redis get name 重定向，说明集群已经是可用。
检查集群状态
$ /opt/redis-4.0.1/src/redis-trib.rb check 172.16.214.160:7000 >>> Performing Cluster Check (using node 172.16.214.160:7000) M: 8a78f3b5c1694caecfe9404f131234328481136f 172.16.214.160:7000 slots:0-4095 (4096 slots) master 2 additional replica(s) M: d4f15c233b82ec71997f72bb9c04a4fb1f44eea8 172.16.214.161:7003 slots:4096-8191 (4096 slots) master 1 additional replica(s) M: 729f02e82887746b85d709e36f9b07148e6af442 172.16.214.163:7006 slots:8192-12287 (4096 slots) master 1 additional replica(s) S: 33a6c6f63ad565e6a9bc76712956d2cbc9819b93 172.16.214.160:7002 slots: (0 slots) slave replicates 729f02e82887746b85d709e36f9b07148e6af442 S: 0860ba2d9cadd23757b2052fe653857fd64e4363 172.16.214.163:7008 slots: (0 slots) slave replicates 8a78f3b5c1694caecfe9404f131234328481136f S: e5c21b38ed2b6b4870df5f8438259dde0687b363 172.16.214.161:7005 slots: (0 slots) slave replicates 1ec686b61ce3b8a1161382503c62748fc1985553 M: 1ec686b61ce3b8a1161382503c62748fc1985553 172.16.214.160:7001 slots:12288-16383 (4096 slots) master 1 additional replica(s) S: 37cf628f031d47fc80dd02247d555eb6ab179686 172.16.214.161:7004 slots: (0 slots) slave replicates 8a78f3b5c1694caecfe9404f131234328481136f S: b586d779805f2f75784bb526ae205cd672534b7a 172.16.214.163:7007 slots: (0 slots) slave replicates d4f15c233b82ec71997f72bb9c04a4fb1f44eea8 [OK] All nodes agree about slots configuration. >>> Check for open slots... >>> Check slots coverage... [OK] All 16384 slots covered.
列出集群节点
$ /opt/redis-4.0.1/src/redis-cli -h 172.16.214.160 -c -p 7000 -a passwd123 172.16.214.160:7000> cluster nodes d4f15c233b82ec71997f72bb9c04a4fb1f44eea8 172.16.214.161:7003@17003 master - 0 1556073732261 4 connected 4096-8191 729f02e82887746b85d709e36f9b07148e6af442 172.16.214.163:7006@17006 master - 0 1556073729000 7 connected 8192-12287 33a6c6f63ad565e6a9bc76712956d2cbc9819b93 172.16.214.160:7002@17002 slave 729f02e82887746b85d709e36f9b07148e6af442 0 1556073731260 7 connected 0860ba2d9cadd23757b2052fe653857fd64e4363 172.16.214.163:7008@17008 slave 8a78f3b5c1694caecfe9404f131234328481136f 0 1556073730000 9 connected e5c21b38ed2b6b4870df5f8438259dde0687b363 172.16.214.161:7005@17005 slave 1ec686b61ce3b8a1161382503c62748fc1985553 0 1556073732061 6 connected 1ec686b61ce3b8a1161382503c62748fc1985553 172.16.214.160:7001@17001 master - 0 1556073729000 2 connected 12288-16383 37cf628f031d47fc80dd02247d555eb6ab179686 172.16.214.161:7004@17004 slave 8a78f3b5c1694caecfe9404f131234328481136f 0 1556073731000 5 connected b586d779805f2f75784bb526ae205cd672534b7a 172.16.214.163:7007@17007 slave d4f15c233b82ec71997f72bb9c04a4fb1f44eea8 0 1556073730000 8 connected 8a78f3b5c1694caecfe9404f131234328481136f 172.16.214.160:7000@17000 myself,master - 0 1556073728000 1 connected 0-4095
打印集群信息
$ 172.16.214.160:7000> cluster info cluster_state:ok cluster_slots_assigned:16384 cluster_slots_ok:16384 cluster_slots_pfail:0 cluster_slots_fail:0 cluster_known_nodes:9 cluster_size:4 cluster_current_epoch:9 cluster_my_epoch:1 cluster_stats_messages_ping_sent:58093 cluster_stats_messages_pong_sent:57405 cluster_stats_messages_sent:115498 cluster_stats_messages_ping_received:57397 cluster_stats_messages_pong_received:58093 cluster_stats_messages_meet_received:8 cluster_stats_messages_publish_received:2 cluster_stats_messages_received:115500
6. 为了安全，最后可以设置admin用户身份不能远程登录
chsh admin -s /sbin/nologin
