centos7安装redis5启动报错：

Job for redis-server.service failed because the control process exited with error code. 
See "systemctl status redis-server.service" and "journalctl -xe" for details.

具体错误：

-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit redis-server.service has failed.
-- 
-- The result is failed.
11月 12 17:55:19 VM-0-6-centos systemd[1]: Unit redis-server.service entered failed sta
11月 12 17:55:19 VM-0-6-centos systemd[1]: redis-server.service failed.
11月 12 17:55:19 VM-0-6-centos systemd[1]: redis-server.service holdoff time over, sche
11月 12 17:55:19 VM-0-6-centos systemd[1]: Stopped Redis 6379.
-- Subject: Unit redis-server.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit redis-server.service has finished shutting down.
11月 12 17:55:19 VM-0-6-centos systemd[1]: start request repeated too quickly for redis
11月 12 17:55:19 VM-0-6-centos systemd[1]: Failed to start Redis 6379.
-- Subject: Unit redis-server.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit redis-server.service has failed.
-- 
-- The result is failed.
11月 12 17:55:19 VM-0-6-centos systemd[1]: Unit redis-server.service entered failed sta
11月 12 17:55:19 VM-0-6-centos systemd[1]: redis-server.service failed.

我是参考这篇博客安装的：https://blog.csdn.net/qq_39228576/article/details/106939545

发现redis.conf配置项中的 `logfile "/var/log/redis/6379.log"`这个是导致Redis启动失败的原因：需要自己手动建立文件夹redis和6379.log文件。

重新启动redis,发现redis终于可以启动成功啦。。。