systemctl 启动redis

你的名字 2022-05-16 11:18 450阅读 0赞

这次经历主要是一次错误原因的查看过程。  
我登陆用户为root  
进行了启动redis服务

redis-server /etc/redis.conf

然后杀死了redis服务后，想直接配置为系统启动方式–systemctl

systemctl enable redis
    systemctl start redis

启动失败，开始提示我使用 journalctl -ex 可以查看详情  
确实可以看到一个错误

-- Unit redis.service has begun starting up.
    8月 20 10:58:40 VM_0_12_centos redis-server[4343]: *** FATAL CONFIG FILE ERROR *** 8月 20 10:58:40 VM_0_12_centos redis-server[4343]: Reading the configuration file, at line 163
    8月 20 10:58:40 VM_0_12_centos redis-server[4343]: >>> 'logfile /var/log/redis/redis.log' 8月 20 10:58:40 VM_0_12_centos redis-server[4343]: Can't open the log file: Permission denied
    8月 20 10:58:40 VM_0_12_centos systemd[1]: redis.service: main process exited, code=exited, status=1 8月 20 10:58:40 VM_0_12_centos redis-shutdown[4344]: Could not connect to Redis at 127.0.0.1:6379: C
    8月 20 10:58:40 VM_0_12_centos systemd[1]: redis.service: control process exited, code=exited status 8月 20 10:58:40 VM_0_12_centos systemd[1]: Failed to start Redis persistent key-value database.
    -- Subject: Unit redis.service has failed
    -- Defined-By: systemd
    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel --
    -- Unit redis.service has failed. --
    -- The result is failed.

可以发现是对日志文件/var/log/redis/redis.log权限不足  
查看了该文件属于root用户root组。  
然后查看服务文件配置

cat /lib/systemd/system/redis.service
    //显示
    [Unit]
    Description=Redis persistent key-value database
    After=network.target
    
    [Service]
    ExecStart=/usr/bin/redis-server /etc/redis.conf --supervised systemd
    ExecStop=/usr/libexec/redis-shutdown
    Type=notify
    User=redis
    Group=redis
    RuntimeDirectory=redis
    RuntimeDirectoryMode=0755
    
    [Install]
    WantedBy=multi-user.target

说明这个服务系统启动后是redis组的，所以改文件权限为redis组即可

chown redis:redis /var/log/redis/redis.log