Bug 1468192 - cloud-init is performing DNS queries to *random* domains such as does-not-exist.example.com and example.invalid
cloud-init is performing DNS queries to *random* domains such as does-not-exi...
Status: ASSIGNED
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: cloud-init (Show other bugs)
7.2
Unspecified Unspecified
medium Severity medium
: rc
: ---
Assigned To: Ryan McCabe
Vratislav Hutsky
: Triaged
Depends On:
Blocks:
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Reported: 2017-07-06 05:18 EDT by Robin Cernin
Modified: 2017-08-08 10:23 EDT (History)
8 users (show)

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Tracker ID Priority Status Summary Last Updated
Launchpad 1658734 None None None 2017-07-06 05:18 EDT

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Description Robin Cernin 2017-07-06 05:18:34 EDT
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.

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