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Bug 1468192 - cloud-init is performing DNS queries to *random* domains such as does-not-exist.example.com and example.invalid
Summary: cloud-init is performing DNS queries to *random* domains such as does-not-exi...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: cloud-init
Version: 7.2
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Eduardo Otubo
QA Contact: Huijuan Zhao
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-07-06 09:18 UTC by Robin Cernin
Modified: 2024-11-20 07:53 UTC (History)
16 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2020-01-20 16:31:43 UTC
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Launchpad 1658734 0 None None None 2017-07-06 09:18:34 UTC

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.
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