隔几个小时，就有如下的告警
Aug 5 05:44:14 db dnf[356416]: Unable to read consumer identity
Aug 5 05:44:14 db dnf[356416]: This system is not registered with an entitlement server. You can use subscription-manager to register.
Aug 5 05:44:14 db dnf[356416]: CentOS Linux 8 0.0 B/s | 0 B 00:00
Aug 5 05:44:14 db dnf[356416]: Errors during downloading metadata for repository 'InstallMedia':
Aug 5 05:44:14 db dnf[356416]: - Curl error (37): Couldn't read a file:// file for file:///mnt/BaseOS/repodata/repomd.xml [Couldn't open file /mnt/BaseOS/repodata/repomd.xml]
Aug 5 05:44:14 db dnf[356416]: Error: Failed to download metadata for repo 'InstallMedia': Cannot download repomd.xml: Curl error (37): Couldn't read a file:// file for file:///mnt/BaseOS/repodata/repomd.xml [Couldn't open file /mnt/BaseOS/repodata/repomd.xml]
Aug 5 05:44:14 db systemd[1]: dnf-makecache.service: Main process exited, code=exited, status=1/FAILURE
Aug 5 05:44:14 db systemd[1]: dnf-makecache.service: Failed with result 'exit-code'.
Aug 5 05:44:14 db systemd[1]: Failed to start dnf makecache.
Aug 5 09:02:05 db dnf[473997]: Unable to read consumer identity
Aug 5 09:02:05 db dnf[473997]: This system is not registered with an entitlement server. You can use subscription-manager to register.
Aug 5 09:02:05 db dnf[473997]: CentOS Linux 8 0.0 B/s | 0 B 00:00
Aug 5 09:02:05 db dnf[473997]: Errors during downloading metadata for repository 'InstallMedia':
Aug 5 09:02:05 db dnf[473997]: - Curl error (37): Couldn't read a file:// file for file:///mnt/BaseOS/repodata/repomd.xml [Couldn't open file /mnt/BaseOS/repodata/repomd.xml]
Aug 5 09:02:05 db dnf[473997]: Error: Failed to download metadata for repo 'InstallMedia': Cannot download repomd.xml: Curl error (37): Couldn't read a file:// file for file:///mnt/BaseOS/repodata/repomd.xml [Couldn't open file /mnt/BaseOS/repodata/repomd.xml]
Aug 5 09:02:05 db systemd[1]: dnf-makecache.service: Main process exited, code=exited, status=1/FAILURE
Aug 5 09:02:05 db systemd[1]: dnf-makecache.service: Failed with result 'exit-code'.
查看dnf-makecache.service服务是非活动，执行stop发现问题点
[root@db ~]# systemctl status dnf-makecache.service
● dnf-makecache.service - dnf makecache
Loaded: loaded (/usr/lib/systemd/system/dnf-makecache.service; static; vendor preset: disabled)
Active: inactive (dead) since Mon 2024-08-05 10:07:46 CST; 52min ago
Process: 513042 ExecStart=/usr/bin/dnf makecache --timer (code=exited, status=0/SUCCESS)
Main PID: 513042 (code=exited, status=0/SUCCESS)
Aug 05 10:07:46 db systemd[1]: Starting dnf makecache...
Aug 05 10:07:46 db dnf[513042]: Updating Subscription Management repositories.
Aug 05 10:07:46 db dnf[513042]: Unable to read consumer identity
Aug 05 10:07:46 db dnf[513042]: This system is not registered with an entitlement server. You can use subscription-manager to register.
Aug 05 10:07:46 db dnf[513042]: Metadata cache refreshed recently.
Aug 05 10:07:46 db systemd[1]: dnf-makecache.service: Succeeded.
Aug 05 10:07:46 db systemd[1]: Started dnf makecache.
[root@db opt]# systemctl stop dnf-makecache.service
Warning: Stopping dnf-makecache.service, but it can still be activated by:
dnf-makecache.timer
直接关闭dnf-makecache.timer，观察了几个小时，发现再也不报错了
[root@db opt]# systemctl status dnf-makecache.timer
● dnf-makecache.timer - dnf makecache --timer
Loaded: loaded (/usr/lib/systemd/system/dnf-makecache.timer; enabled; vendor preset: enabled)
Active: active (waiting) since Thu 2024-03-21 11:23:47 CST; 4 months 15 days ago
Trigger: Mon 2024-08-05 11:48:32 CST; 46min left
Mar 21 11:23:47 db systemd[1]: Started dnf makecache --timer.
[root@db ~]# systemctl stop dnf-makecache.timer
[root@db ~]# systemctl disable dnf-makecache.timer