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redis安装

redis官网

redis所有版本下载地址

docker安装

redis docker hub

docker

docker run -d \
  --name redis \
  -p 6379:6379 \
  -v /data/docker-volume/redis/data:/data \
  -v /data/docker-volume/redis/conf/redis.conf:/usr/local/etc/redis/redis.conf \
  redis:8 \
  redis-server /usr/local/etc/redis/redis.conf

compose

cat > docker-compose.yml << EOF
services:
  redis:
    image: redis:8
    container_name: redis
    restart: always
    ports:
      - "6379:6379"
    volumes:
      - ./data:/data
      - ./redis.conf:/usr/local/etc/redis/redis.conf
    command: >
      redis-server /usr/local/etc/redis/redis.conf
EOF

源码安装

下载源码包

export REDIS_VERSION=8.2.3
wget http://download.redis.io/releases/redis-${REDIS_VERSION}.tar.gz

解压缩包

tar xf redis-${REDIS_VERSION}.tar.gz -C /usr/local

编译安装

cd /usr/local/redis-${REDIS_VERSION}
make

添加环境变量

cat > /etc/profile.d/redis.sh << EOF
export PATH="/usr/local/redis-${REDIS_VERSION}/src:$PATH"
EOF
source /etc/profile

创建相关目录

mkdir -p /etc/redis/6379
mkdir -p /var/log/redis/6379
mkdir -p /var/run/redis/6379

创建redis配置文件

cat > /etc/redis/6379/redis.conf << EOF
# 是否守护进程模式启动
daemonize no

# 使用 systemd 监管
supervised systemd

# 端口 日志 pid文件
port 6379
logfile /var/log/redis/6379/redis.log
pidfile /var/run/redis/redis_6379.pid

# 持久化数据文件存储位置
dir /etc/redis/6379

# RDB持久化数据文件名称
dbfilename dump.rdb
EOF

使用systemd管理redis

说明

这边并没有使用 ExecStop=/bin/kill -s QUIT $MAINPID 这样的命令来停止redis，因为使用这个语句在运行 systemctl stop redis后，redis并未执行关闭动作，而是直接退出，这时候用 systemctl status redis 查看状态是failed，只有用 ExecStop=/install_path/bin/redis-cli -p 6379 shutdown 才能正确停止redis

cat > /usr/lib/systemd/system/redis.service << EOF
[Unit]
Description=Redis
After=network.target
 
[Service]
# Type=forking
PIDFile=/var/run/redis/redis_6379.pid
ExecStart=/usr/local/redis-${REDIS_VERSION}/src/redis-server /etc/redis/6379/redis.conf 
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/usr/local/redis-${REDIS_VERSION}/src/redis-cli -p 6379 shutdown
PrivateTmp=true
 
[Install]
WantedBy=multi-user.target
EOF

启动redis

# 重载系统服务
systemctl daemon-reload

# 启动redis
systemctl enable redis && systemctl start redis

使用systemd管理redis遇到的问题

重载系统服务后启动redis卡住不动

解决方法

注释 /usr/lib/systemd/system/redis.service 文件中 Type=forking 一项

网上解释原因

If set to forking, it is expected that the process configured with ExecStart= will call fork() as part of its start-up. The parent process is expected to exit when start-up is complete and all communication channels are set up. The child continues to run as the main daemon process. This is the behavior of traditional UNIX daemons. If this setting is used, it is recommended to also use the PIDFile= option, so that systemd can identify the main process of the daemon. systemd will proceed with starting follow-up units as soon as the parent process exits.

如果设置为fork，则使用ExecStart=配置的进程将调用fork()作为启动的一部分。启动完成并设置好所有通信通道后，父进程将退出。子进程继续作为主守护进程运行。这是传统UNIX守护进程的行为。如果使用了该设置，建议还使用PIDFile=选项，以便systemd能够识别守护进程的主进程。一旦父进程退出，systemd将开始启动后续单元。

redis安全配置

protected-mode

说明

保护模式，是否只允许本地访问，默认是 yes

protected-mode no

bind

说明

指定IP进行监听

::;

bind 127.0.0.1

requirepass

说明

增加密码

requirepass 1

# 连接方式1
$ redis-cli
127.0.0.1:6379> set name xiaoming
(error) NOAUTH Authentication required.
127.0.0.1:6379> AUTH 1
OK
127.0.0.1:6379> set name xiaoming
OK

# 连接方式2
$ redis-cli -a 1
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:6379> set name xiaoliang
OK