IPv6 not enabling on EC2 when done afterwards (CentOS 7.6)

[ubuntu-server-builder]

This bug was originally filed in Launchpad as LP: #1818641

Launchpad details

affected_projects = []
assignee = None
assignee_name = None
date_closed = 2019-11-17T04:17:30.909347+00:00
date_created = 2019-03-05T11:15:06.650720+00:00
date_fix_committed = None
date_fix_released = None
id = 1818641
importance = medium
is_complete = True
lp_url = https://bugs.launchpad.net/cloud-init/+bug/1818641
milestone = None
owner = jcn50
owner_name = Chris NIVARD
private = False
status = expired
submitter = jcn50
submitter_name = Chris NIVARD
tags = ['aws', 'ec2', 'ipv6']
duplicates = []

Launchpad user Chris NIVARD(jcn50) wrote on 2019-03-05T11:15:06.650720+00:00

How to reproduce:

On AWS EC2:

• launch a CentOS 7.6 instance with IPv4 only
• once running: assign an IPv6 from AWS EC2, and reboot the instance
• while the instance data is properly populated: the network configuration does not assign the IPv6 to the instance (no connection).

Unsuccessful turnaround attempts:

A) /etc/cloud/cloud.cfg.d/99-ipv6-networking.cfg network: version: 1 config:

• type: physical name: eth0 subnets:
  • type: dhcp6

B) There has been a debate in the CentOS github as to whether AWS was IPv6 RFC compliant, read the entire thread here: https://github.com/coreos/bugs/issues/1828 A solution provided there for Ubuntu cannot be applied on CentOS.

[ubuntu-server-builder]

Launchpad user Ryan Harper(raharper) wrote on 2019-04-29T14:19:47.178942+00:00

Hi,

Thanks for filing a bug. Would you be able to confirm which version of cloud-init is installed in the image? And can you attach your /var/log/cloud-init.log as well as /etc/sysconfig/network-scripts/ifcfg-* config files?

Note, cloud-init has support for configuring ipv6 in ec2 since 18.3 I believe so this should be fixed in master. You could also try using the cloud-init daily build:

https://copr.fedorainfracloud.org/coprs/g/cloud-init/cloud-init-dev/

[ubuntu-server-builder]

Launchpad user Launchpad Janitor(janitor) wrote on 2019-09-17T04:17:38.767205+00:00

[Expired for cloud-init because there has been no activity for 60 days.]

[ubuntu-server-builder]

Launchpad user Chris NIVARD(jcn50) wrote on 2019-09-17T08:48:20.137503+00:00

Do I have to do anything or has the bug been verified/fixed?

[ubuntu-server-builder]

Launchpad user Dan Watkins(oddbloke) wrote on 2019-09-17T09:13:10.400615+00:00

Hey Chris,

We're waiting for the debug information that Ryan requested in comment #1 to be able to move this forward. I'm setting this back to Incomplete, please move it to New once you have attached that information.

Thanks!

Dan

[ubuntu-server-builder]

Launchpad user Launchpad Janitor(janitor) wrote on 2019-11-17T04:17:30.718972+00:00

[Expired for cloud-init because there has been no activity for 60 days.]