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Maniphest T7422

lcn.zfc.id.lv keeps flapping between warning and ok causing icinga spam
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Description

I'm not sure what to do here but host lcn.zfc.id.lv is slow but I cannot reproduce running /usr/lib/nagios/plugins/check_reverse_dns.py -H lcn.zfc.id.lv -r "^cp[0-9]+\\.miraheze\\.org$" the flappingness.

Event Timeline

Paladox triaged this task as High priority.Jun 7 2021, 14:35
Paladox created this task.
Herald added subscribers: Unknown Object (User), RhinosF1, Reception123. · View Herald TranscriptJun 7 2021, 14:35
Paladox added a subscriber: Xymachos.Jun 7 2021, 14:57

@Xymachos could you switch the cname to mw-lb.miraheze.org please?

Reception123 closed this task as Resolved.Jun 12 2021, 14:36
Reception123 claimed this task.

Seems to be pointed / fine now.

Void reopened this task as Open.Jun 17 2021, 02:55
Void reassigned this task from Reception123 to Xymachos.
Void edited subscribers, added: Void; removed: Paladox.

@Xymachos could you switch the cname to mw-lb.miraheze.org please?

@Xymachos see ^

Void lowered the priority of this task from High to Normal.Jun 17 2021, 02:55
Reception123 added a comment.Jun 23 2021, 09:26

@Void This does seem resolved to me?

lcn.zfc.id.lv.          300     IN      CNAME   lacrosnostra.miraheze.org.
lacrosnostra.miraheze.org. 150  IN      A       51.38.69.175
Void added a comment.Jun 23 2021, 14:13

Hmm, shouldn't the CNAME be to mw-lb.miraheze.org, or should that not make a difference? Either way, there seems to be something with the domain setup that is causing our RDNS health check to fail somewhat inconsistently.

Reception123 added a comment.Jun 23 2021, 16:15
In T7422#150859, @Void wrote:

Hmm, shouldn't the CNAME be to mw-lb.miraheze.org, or should that not make a difference? Either way, there seems to be something with the domain setup that is causing our RDNS health check to fail somewhat inconsistently.

Oh true, it seemed right but the first part should be different yeah, it should look like this (see below). Though I wonder how it works if it's not pointed to mw-lb but to the domain itself instead.

X     300     IN      CNAME   mw-lb.miraheze.org.
mw-lb.miraheze.org.     150     IN      A       51.38.69.175
Bukkit subscribed.Jun 27 2021, 22:11

@Xymachos, can you please change your CNAME to

mw-lb.miraheze.org
Herald removed a subscriber: Bukkit. · View Herald TranscriptJun 27 2021, 22:11
Xymachos added a comment.Jun 28 2021, 12:41

Done.

Reception123 closed this task as Resolved.Jun 29 2021, 06:33

Thanks!