Redis 单点部署
安装依赖
下载redis源码包
离线部署时将源码包提前下载好上传至需要部署的服务器上即可。
下载方式1：离线下载redis地址：redis-5.0.4.tar.gz
下载方式2：执行👇命令可以直接下载redis源码包
curl -O http://download.redis.io/releases/redis-5.0.4.tar.gz
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如果没有安装curl，需要先安装 curl sudo yum install -y curl
如果是离线的服务器可以参考我的另一篇文章《Centos7 初步操作指北》 可以先配置离线yum源然后执行👆安装curl的命令。
上传源码包并解压
tar -zxvf /***/redis-5.0.4.tar.gz
cd /***/redis-5.0.4
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编译并安装到指定目录
make
make PREFIX=/usr/local/redis install
make && make PREFIX=/usr/local/redis install
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指定配置文件
mkdir -p /usr/local/redis/config
cp /***/redis-5.0.4/redis.conf /usr/local/redis/config/
vi /usr/local/redis/config/redis.conf
daemonize yes
requirepass 123456
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设置开机自启
创建redis.service文件：vi /etc/systemd/system/redis.service
添加如下内容：
[Unit]
Description=Redis
After=network.target
[Service]
Type=forking
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/config/redis.conf
ExecStop=/usr/local/redis/bin/redis-server -s stop
PrivateTmp=true
User=root
Group=root
[Install]
WantedBy=multi-user.target
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常用命令如下：
- 启动redis：systemctl start redis
- 关闭redis：systemctl stop redis
- 设置开机自启：systemctl enable redis
- 关闭开机自启：systemctl disable redis
- 查看运行状态：systemctl status redis
Redis 集群部署
用三台虚拟机模拟6个节点，一台虚机2个节点，创建出3主3从（3 master 3 slave）
虚拟机系统：centos7，IP：10.0.0.77，10.0.0.78，10.0.0.79
yum install -y gcc-c++
curl -O http://download.redis.io/releases/redis-5.0.4.tar.gz
tar -zxvf redis-5.0.4.tar.gz
cd redis-5.0.4
make && make install PREFIX=/usr/local/redis install
cp /usr/local/redis/bin/* /usr/bin
mkdir /usr/local/redis/redis-cluster
mkdir /usr/local/redis/redis-cluster/7001 /usr/local/redis/redis-cluster/7002
cp redis.conf /usr/local/redis/redis-cluster/7001
cp redis.conf /usr/local/redis/redis-cluster/7002
vi /usr/local/redis/redis-cluster/7001/redis.conf
port 7001
bind 10.0.0.77
daemonize yes
protected-mode no
pidfile /var/run/redis_7001.pid
cluster-enabled yes
cluster-config-file nodes-7001.conf
cluster-node-timeout 15000
appendonly yes
masterauth 123456
requirepass 123456
vi /etc/systemd/system/redis-cluster7001.service
[Unit]
Description=redis-cluster
After=network.target
[Service]
Type=forking
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/redis-cluster/7001/redis.conf
ExecStop=/usr/local/redis/bin/redis-cli -c -h 10.0.0.77 -p 7001 shutdown
PrivateTmp=true
User=root
Group=root
[Install]
WantedBy=multi-user.target
systemctl enable --now redis-cluster7001
redis-cli --cluster create 10.0.0.77:7001 10.0.0.77:7002 10.0.0.78:7003 10.0.0.78:7004 10.0.0.79:7005 10.0.0.79:7006 --cluster-replicas 1 -a 123456
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 10.0.0.78:7004 to 10.0.0.77:7001
Adding replica 10.0.0.79:7006 to 10.0.0.78:7003
Adding replica 10.0.0.77:7002 to 10.0.0.79:7005
M: d28293bf7b1bdcdedd6f86ef640dbf02eb1bc3c8 10.0.0.77:7001
slots:[0-5460] (5461 slots) master
S: 546f9aef447edc559e1af236e8c46b1622b9f450 10.0.0.77:7002
replicates 8157d10d78d5f23bc6c12900eb20b04d4c389bb6
M: c8cb73195d6cb4b1d01f5f2abd743240317f0013 10.0.0.78:7003
slots:[5461-10922] (5462 slots) master
S: 58fbce09f2e686a1f66b58f1521b9a39908cb87a 10.0.0.78:7004
replicates d28293bf7b1bdcdedd6f86ef640dbf02eb1bc3c8
M: 8157d10d78d5f23bc6c12900eb20b04d4c389bb6 10.0.0.79:7005
slots:[10923-16383] (5461 slots) master
S: 6b9fc42e2737dcb85d84e2744d1fa00b9bbe5a57 10.0.0.79:7006
replicates c8cb73195d6cb4b1d01f5f2abd743240317f0013
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
....
>>> Performing Cluster Check (using node 10.0.0.77:7001)
M: d28293bf7b1bdcdedd6f86ef640dbf02eb1bc3c8 10.0.0.77:7001
slots:[0-5460] (5461 slots) master
1 additional replica(s)
S: 546f9aef447edc559e1af236e8c46b1622b9f450 10.0.0.77:7002
slots: (0 slots) slave
replicates 8157d10d78d5f23bc6c12900eb20b04d4c389bb6
M: c8cb73195d6cb4b1d01f5f2abd743240317f0013 10.0.0.78:7003
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
M: 8157d10d78d5f23bc6c12900eb20b04d4c389bb6 10.0.0.79:7005
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: 58fbce09f2e686a1f66b58f1521b9a39908cb87a 10.0.0.78:7004
slots: (0 slots) slave
replicates d28293bf7b1bdcdedd6f86ef640dbf02eb1bc3c8
S: 6b9fc42e2737dcb85d84e2744d1fa00b9bbe5a57 10.0.0.79:7006
slots: (0 slots) slave
replicates c8cb73195d6cb4b1d01f5f2abd743240317f0013
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
redis-cli -c -h 10.0.0.78 -p 7003
cluster info
cluster nodes
10.0.0.78:7003> set hello world
-> Redirected to slot [866] located at 10.0.0.77:7001
OK
redis-cli -c -h 10.0.0.79 -p 7005
10.0.0.79:7005> get hello
-> Redirected to slot [866] located at 10.0.0.77:7001
"world"
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设置密码
$ redis-cli -h 10.0.0.77 -p 7001 -c
10.0.0.77:7001> config set requirepass 'password' // 设置密码
10.0.0.77:7001> config set masterauth 'password' // 设置连接密码
10.0.0.77:7001> config rewrite // 把config set 操作写入配置文件中
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新增删除节点
./redis-cli --cluster add-node 10.0.0.80:7007 10.0.0.80:7008
redis-cli --cluster add-node {新节点IP}:{新节点端口} {任意集群节点IP}:{对应端口}
./redis-cli --cluster check 10.0.0.77:7001
./redis-cli --cluster del-node 10.0.0.77:7001 d9da56a8f068d5529a7771addf586d14e14ca888
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masterauth和requirepass
requreipass和master的作用？
masterauth作用：主要是针对master对应的slave节点设置的，在slave节点数据同步的时候用到。
requirepass作用：对登录权限做限制，redis每个节点的requirepass可以是独立、不同的。
是否只设置requirepass就可以？masterauth是否需要同步设置？
redis启用密码认证一定要requirepass和masterauth同时设置。
如果主节点设置了requirepass登录验证，在主从切换，slave在和master做数据同步的时候首先需要发送一个ping的消息给主节点判断主节点是否存活，再监听主节点的端口是否联通，发送数据同步等都会用到master的登录密码，否则无法登录，log会出现响应的报错。也就是说slave的masterauth和master的requirepass是对应的，所以建议redis启用密码时将各个节点的masterauth和requirepass设置为相同的密码，降低运维成本。当然设置为不同也是可以的，注意slave节点masterauth和master节点requirepass的对应关系就行。
