redis主从配置及哨兵

1、主从配置

1、下载安装redis

下载安装上redis

2、修改配置文件

所有机器都需要配置

vim redis.conf

daemonize yes	#后台运行
bind 0.0.0.0	#取消访问限制
protected-mode no	#允许远程访问
requirepass 123456	#密码（可以不要密码）
masterauth 123456	#集群主机密码(每台都要配，主机会切换，没有密码不要这个)

slave额外配置

slaveof  192.168.2.152 6379	#主机地址(master)(可以不配然后直接在redis客户端中输入`slaveof  192.168.2.152 6379`命令指定我是谁的奴隶)
#slaveof no one  #使从服务器关闭复制功能，并从从服务器转变为主服务器，原来同步所得的数据不会丢弃

3、启动redis

src目录下

./src/redis-server ./redis.conf

2、哨兵配置

1、修改配置文件

所有机器上都需要配置

vim sentinel.conf

sentinel monitor mymaster 192.168.13.139 6379 2 
#当集群中有2个sentinel认为master死了时，才能真正认为该master已经不可用了。mymaster是自定义的集群名字 (slave上面写的是master的ip，master写自己ip)
sentinel auth-pass mymaster 123456
#有密码的话配置密码 主机与从机的密码需保持一致
protected-mode no
#关闭保护模式

2、启动哨兵

src目录下

./src/redis-sentinel ./sentinel.conf >/dev/null 2>&1 &

3、大佬的搭建

1、环境准备

echo 512 > /proc/sys/net/core/somaxconn ;\
echo vm.overcommit_memory=1 >> /etc/sysctl.conf ;\
sysctl -p ;\
echo 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' >> /etc/rc.local ;\
chmod +x /etc/rc.d/rc.local ;\
useradd -s  /sbin/nologin redis ;\
mkdir -p /var/lib/redis/run ;\
mkdir -p /var/lib/redis/logs ;\
mkdir -p /var/lib/redis/data/26379 ;\
mkdir -p /var/lib/redis/data/6379 ;\
touch /var/lib/redis/logs/6379.log ;\
touch /var/lib/redis/logs/6379.log ;\
firewall-cmd --add-port=26379/tcp --permanent ;\
firewall-cmd --add-port=6379/tcp --permanent ;\
firewall-cmd --reload ;\
firewall-cmd --list-all

2、编译安装

tar xf redis-4.0.11.tar.gz;\
cd redis-4.0.11;\
yum install gcc make -y;\
make && make install;\
mkdir /etc/redis;\
cp redis.conf /etc/redis/;\
chown -R redis. /etc/redis;\
chown -R redis. /var/lib/redis

3、修改node配置

#修改数据目录
sed -i '/dir ./c\dir /var/lib/redis/data/6379' /etc/redis/redis.conf

#更改日志目录
sed -i '/logfile /c\logfile "/var/lib/redis/logs/6379.log"' /etc/redis/redis.conf

#访问master需要的密码
sed -i '/masterauth /c\masterauth Redis_dev_2018' /etc/redis/redis.conf

#自身密码
sed -i '/requirepass /c\requirepass Redis_dev_2018' /etc/redis/redis.conf

#注释掉bind
sed -i '/bind 127.0.0.1/c\#bind 127.0.0.1' /etc/redis/redis.conf

4、添加node节点

tee /etc/systemd/system/redis.service << 'EOF'
[Unit]
Description=Redis Server
After=network.target
[Service]
Type=simple
PIDFile=/var/lib/redis/run/6379.pid
User=redis
Group=redis
LimitNOFILE=100000
ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf
ExecStop=/usr/local/bin/redis-cli -p 6379 shutdown
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

5、启动node

systemctl daemon-reload ;\
systemctl enable redis ;\
systemctl start redis ;\
systemctl status redis

6、添加sentinel配置晚间

tee /etc/redis/sentinel.conf << 'EOF'
port 26379
dir "/var/lib/redis/data/26379"
protected-mode no
daemonize no
logfile "/var/lib/redis/logs/26379.log"

sentinel monitor dev 192.168.1.151 6379 2
sentinel down-after-milliseconds dev 20000
sentinel failover-timeout dev 60000
sentinel auth-pass dev Redis_dev_2018
EOF

chown -R redis. /etc/redis

7、添加sentinel服务

tee /etc/systemd/system/redis-sentinel.service << 'EOF'
[Unit]
Description=Redis sentinel Server
After=network.target
[Service]
Type=simple
PIDFile=/var/lib/redis/run/26379.pid
User=redis
Group=redis
LimitNOFILE=100000
ExecStart=/usr/local/bin/redis-server /etc/redis/sentinel.conf --sentinel
ExecStop=/usr/local/bin/redis-cli -p 26379 shutdown
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

8、启动sentinel

systemctl daemon-reload ;\
systemctl enable redis-sentinel ;\
systemctl start redis-sentinel ;\
systemctl status redis-sentinel

9、维护slave关系

#添加slave-42
redis-cli -h 192.168.1.152

auth Redis_dev_2018

slaveof 192.168.1.151 6379


#添加slave-43
redis-cli -h 192.168.1.153

auth Redis_dev_2018

slaveof 192.168.1.151 6379

10、常用命令

#查看slave信息
redis-cli -p 26379

sentinel slaves dev