Redis安装配置

1. 从源码安装并编译Redis

这里安装的是最新的稳定版

wget https://download.redis.io/redis-stable.tar.gz
tar -xzvf redis-stable.tar.gz
cd redis-stable
make
make install

2.调整系统参数

在文件/etc/sysctl.conf在末尾加上：

cat  >> /etc/sysctl.d/99-sysctl.conf <<EOF
net.core.somaxconn = 1024	
vm.overcommit_memory = 1
EOF

sysctl -p

修改文件/etc/security/limits.d/20-nproc.conf

* soft nofile 10241 
* hard nofile 10241

立即生效
ulimit -n 10241

创建用户redis

mkdir /etc/redis
# 存放日志
mkdir /var/log/redis
chown redis:redis /var/log/redis
# 存放PID文件
mkdir /var/run/redis
chown -R redis:redis /var/run/redis

3. 编辑配置文件

cp /usr/local/redis-6.2.3/redis.conf /etc/redis/redis_6379.conf
# /etc/redis/redis_6379.conf
bind 0.0.0.0
daemonize yes
pidfile /var/run/redis/redis_6379.pid
logfile /var/log/redis/redis_6379.log
dbfilename dump_6379.rdb   # 多实例时需要修改
appendfilename "appendonly_6379.aof"  # 多实例时需要修改
dir /var/lib/redis

4. 使用system管理

可以参考源码中的 utils/systemd-redis_server.service 文件

cat >/usr/lib/systemd/system/redis_server.service <<EOF
[Unit]
Description=Redis
After=network.target

[Service]
Type=forking
LimitNOFILE=10032
PIDFile=/var/run/redis_6399.pid
ExecStart=/usr/local/bin/redis-server  /etc/redis_6399.conf
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true
[Install]
WantedBy=multi-user.target
EOF

设置开机自启动

systemctl daemon-reload
systemctl start   redis_server.service
systemctl enable redis_server.service

多实例管理
参考/usr/local/redis-6.2.3/utils/systemd-redis_multiple_servers@.service文件

[Unit]
Description=Redis data structure server - instance %i
Documentation=https://redis.io/documentation
# This template unit assumes your redis-server configuration file(s)
# to live at /etc/redis/redis_server_<INSTANCE_NAME>.conf
AssertPathExists=/etc/redis/redis_%i.conf
#Before=your_application.service another_example_application.service
AssertPathExists=/var/lib/redis

[Service]
Type=forking
LimitNOFILE=10032
PIDFile=/var/run/redis/redis_%i.pid
ExecStart=/usr/local/bin/redis-server /etc/redis/redis_%i.conf
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
User=redis
Group=redis
WorkingDirectory=/var/lib/redis

[Install]
WantedBy=multi-user.target