Bug 1468192

Summary: cloud-init is performing DNS queries to *random* domains such as does-not-exist.example.com and example.invalid
Product: Red Hat Enterprise Linux 7 Reporter: Robin Cernin <rcernin>
Component: cloud-initAssignee: Eduardo Otubo <eterrell>
Status: CLOSED CURRENTRELEASE QA Contact: Huijuan Zhao <huzhao>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.2CC: cww, eterrell, fdinitto, jbadiapa, jgreguske, lars, mmagr, molasaga, mrunge, nchandek, rcernin, ribarry, rmccabe, yacao, yujiang, yuxisun
Target Milestone: rcKeywords: Triaged
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-01-20 16:31:43 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Robin Cernin 2017-07-06 09:18:34 UTC
Description of problem:

cloud-init is performing DNS queries to *random* domains such as does-not-exist.example.com and example.invalid upon the start to verify the DNS redirection is configured.

Either environment with IDS or without DNS server configured this might be issue as when doing a lookup it might be flagged as potentially suspicious or causing timeouts, which can lasts hundred of seconds.

Version-Release number of selected component (if applicable):

All

How reproducible:

restart VM check for the DNS requests.

Additional info:

We are looking for a patch that would possibly disable the function by setting the empty list during the checks.