Bug 37501 – Detection of UCS domain/UCS master should work with broken/missing reverse pointer

Bug 37501 - Detection of UCS domain/UCS master should work with broken/missing reverse pointer


Summary:	Detection of UCS domain/UCS master should work with broken/missing reverse po...

Status:	RESOLVED WONTFIX

Product:	UCS
Classification:	Unclassified
Component:	UMC - Setup wizard
Version:	UCS 4.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 4.0-x
Assigned To:	UMC maintainers
QA Contact:

URL:
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Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2015-01-09 11:37 CET by Janis Meybohm
Modified:	2019-01-03 07:17 CET (History)
CC List:	8 users (show)

See Also:	37263
What kind of report is it?:	Bug Report
What type of bug is this?:	6: Setup Problem: Issue for the setup process
Who will be affected by this bug?:	1: Will affect a very few installed domains
How will those affected feel about the bug?:	5: Blocking further progress on the daily work
User Pain:	0.171
Enterprise Customer affected?:	Yes
School Customer affected?:
ISV affected?:
Waiting Support:
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Bug group (optional):	Error handling, External feedback
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Description Janis Meybohm

2015-01-09 11:37:28 CET

Ticket#2014121821000138
Ticket#2014120921000262

Because the setup tries to parse the domain name from a reverse lookup of the DNS servers IP (like "host -t PTR <DNS-Servers-IP> <DNS-Servers-IP>") the validation of the UCS domain (when installing dc-backup, dc-slave or memberserver) fails if  the DNS reverse pointer for the IP of the DC-Master is wrong or missing.

A reverse pointer should not be needed for installation.

Comment 1 Tim Petersen

2015-07-30 10:07:37 CEST

This currently prevents the "virtualized master" scenario.

Comment 2 Florian Best

2017-06-28 14:53:04 CEST

There is a Customer ID set so I set the flag "Enterprise Customer affected".

Comment 3 Jannik Ahlers

2018-11-28 17:03:59 CET

I'm not too sure if it is a good idea to allow installation if the reverse pointer is broken. We should focus on finding the issue that caused the broken PTR RR in the first place.

Additionally, I think it would be a good idea to check the PTR RR during installation, so we can give a better error message if it is broken or missing. I pushed a first draft of this into the git branch jahlers/37501-setup-reverse-dns.

Comment 4 Stefan Gohmann

2019-01-03 07:17:59 CET

This issue has been filled against UCS 4.0. The maintenance with bug and security fixes for UCS 4.0 has ended on 31st of May 2016.

Customers still on UCS 4.0 are encouraged to update to UCS 4.3. Please contact
your partner or Univention for any questions.

If this issue still occurs in newer UCS versions, please use "Clone this bug" or simply reopen the issue. In this case please provide detailed information on how this issue is affecting you.