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Bug 1558854 - cloud-init-0.7.9-9.el7_4.6 breaks IPv4/IPv6 dual-stack EC2 instances in AWS
Summary: cloud-init-0.7.9-9.el7_4.6 breaks IPv4/IPv6 dual-stack EC2 instances in AWS
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: cloud-init
Version: 7.4
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Eduardo Otubo
QA Contact: Vratislav Hutsky
URL:
Whiteboard:
Depends On:
Blocks: 1578702 1581149
TreeView+ depends on / blocked
 
Reported: 2018-03-21 07:04 UTC by Robin Cernin
Modified: 2024-11-21 02:52 UTC (History)
21 users (show)

Fixed In Version: cloud-init-18.2-1.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1578702 1581149 (view as bug list)
Environment:
Last Closed: 2018-10-30 11:30:45 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:3241 0 None None None 2018-10-30 11:31:41 UTC

Comment 11 Andrew Lau 2018-03-26 23:00:44 UTC 
For anybody else following this bug report publicly, a temporary workaround would be to 
explicitly set “IPV6_AUTOCONF=yes” in /etc/sysconfig/network-scripts/ifcfg-eth0 and to touch /var/lib/cloud/data/upgraded-network as this will prevent cloud-init from overwriting it upon the next reboot.
Comment 19 Vitaly Kuznetsov 2018-04-19 11:59:43 UTC 
I'm proposing our change upstream:
https://code.launchpad.net/~vkuznets/cloud-init/+git/cloud-init/+merge/343601

Depending on the outcome we'll make a decision about this BZ.
Comment 20 Robin Cernin 2018-04-26 02:03:12 UTC 
The upstream change is Merged, could we get a testbuild?
Thank you
Comment 21 Vitaly Kuznetsov 2018-04-26 10:13:27 UTC 
(In reply to Robin Cernin from comment #20)
> The upstream change is Merged, could we get a testbuild?

Sure,

http://download.eng.bos.redhat.com/brewroot/work/tasks/4051/15904051/cloud-init-0.7.9-25.bug1558854.el7.x86_64.rpm

this is the same build I provided in https://bugzilla.redhat.com/show_bug.cgi?id=1558854#c15

It reverts unconditional "IPV6_AUTOCONF" disabling. Amazon's manual will have to be updated to state that both "dhcp6" and "dhcp" subnets now need to be specified.
Comment 26 Rick Barry 2018-05-15 18:55:54 UTC 
Pablo, if you're asking about the need for a hot fix, I'm not aware of a request for that. Customers have a work-around, but Robin Cernin may have an opinion on whether a hot-fix needed.
Comment 36 Vitaly Kuznetsov 2018-05-23 07:26:16 UTC 
I submitted pull request to AWS docs to get their doc fixed:
https://github.com/awsdocs/amazon-vpc-user-guide/pull/5
Comment 49 Vitaly Kuznetsov 2018-06-11 16:09:59 UTC 
In the meantime my poll request got merged and Amazon's doc
https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-migrate-ipv6.html#ipv6-dhcpv6-rhel
is now correct.
Comment 62 errata-xmlrpc 2018-10-30 11:30:45 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3241
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