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