Vu Nguyen via FreeIPA-devel wrote:
> After 7days, I tried to log in freeipa webUI and got this "Login failed due 
> to an unknown reason" message. So I rebooted my machine. After that I cannot 
> connect to freeipa webUI. Then I check ipa.service and got some errors 
> related to krb5 like "Failed to start krb5kdc Service" so I tried to start 
> krb5kdc.service but get errors too. Which is "krb5kdc: cannot initialize 
> realm". I checked the log file and got something might helpful : 
> "Cannot find master key record in database - while fetching master keys list 
> for realm"
> "Didn't connect to LDAP on startup: 110"
> "Server error - while fetching master key K/M for realm"
> I also tried to run "kinit admin" command and got this message "kinit: Cannot 
> contact any KDC for realm"
> I guess it is because my certificate expired which lead to this issue. Does 
> anyone know what should I do to fix this issue and prevent it in the future? 

What are the 7 days? Is this seven days after the initial installation?
Certificates are good for two years.

The root cause appears that the LDAP server (389-ds) did not start. The
logs are in /var/log/dirsrv/slapd-REALM. I'd suggest taking a look at
errors.

And/or try ipactl restart. It'll fail pretty quickly if 389-ds won't
start and again, the logs should tell you what happened.

rob
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