Hi Joseph,

I tried many methods, but still not fixed the issue.

I found there are some related issued fixed in upstream, but not yet merged to formal release.

I’m discussing with them. Do you have any comment?

https://github.com/rabbitmq/rabbitmq-peer-discovery-k8s/issues/55

Thanks!

Zhipeng

From: Liu, ZhipengS
Sent: 2020年3月12日 9:53
To: 'Richard, Joseph' <Joseph.Richard@windriver.com>; starlingx-discuss@lists.starlingx.io
Subject: RE: [Starlingx-discuss] IPv6 issue when apply OpenStack on IPv6 simplex.

Hi Joseph,

Thank you so much! 😊

I will work further based on your provided clue.

Best Regards,

Zhipeng

From: Richard, Joseph <Joseph.Richard@windriver.com>
Sent: 2020年3月12日 5:06
To: Liu, ZhipengS <zhipengs.liu@intel.com>; starlingx-discuss@lists.starlingx.io
Subject: Re: [Starlingx-discuss] IPv6 issue when apply OpenStack on IPv6 simplex.

I see a similar issue online here:

https://groups.google.com/forum/#!topic/rabbitmq-users/9ir1WK-nYBA

epmd fails to start in IPv6 environment Posted 7/15/19 9:43 PM, 12 messages groups.google.com

I expect that you are going to have to update rabbmitmq docker images to 3.7.16(currently 3.7.13), and then modify the helm plugin to pass in these values when using ipv6:

SERVER_ADDITIONAL_ERL_ARGS='-proto_dist inet6_tcp'

CTL_ERL_ARGS='-proto_dist inet6_tcp'

Not sure if this is possible right now, or if you will need to modify openstack-helm-infra/rabbitmq in order to be able to pass these environment variables in.

---

From: Liu, ZhipengS <zhipengs.liu@intel.com>
Sent: Thursday, February 27, 2020 8:00 AM
To: starlingx-discuss@lists.starlingx.io <starlingx-discuss@lists.starlingx.io>
Subject: [Starlingx-discuss] IPv6 issue when apply OpenStack on IPv6 simplex.

Hi all,

For below LP IPv6: stx-openstack app apply failed by time out waiting for the condition "grpc_status"

https://bugs.launchpad.net/starlingx/+bug/1859641

I provided a patch which can fix the known issue in LP.

However, it still failed later when starting rabbitmq pod.

controller-0:~$ kubectl -n openstack get po
NAME READY STATUS RESTARTS AGE
ingress-c74489c96-jsb7n 1/1 Running 0 17h
ingress-error-pages-5889bfcf6c-h8kl6 1/1 Running 0 17h
mariadb-ingress-b5cd65f4b-sq46c 1/1 Running 0 17h
mariadb-ingress-error-pages-6d8b79b74f-9zmpc 1/1 Running 0 17h
mariadb-server-0 1/1 Running 0 17h
osh-openstack-memcached-memcached-545668bdbd-9jkv2 1/1 Running 0 17h
osh-openstack-rabbitmq-cluster-wait-wbnwp 0/1 Init:0/2 0 17h
osh-openstack-rabbitmq-rabbitmq-0 0/1 CrashLoopBackOff 207 17h

There are below error logs

2020-02-26T07:43:36.451103975Z stderr F ++ echo osh-openstack-rabbitmq-rabbitmq-0
2020-02-26T07:43:36.45142814Z stderr F ++ awk -F - '{print $NF}'
2020-02-26T07:43:36.454160452Z stderr F + POD_INCREMENT=0
2020-02-26T07:43:36.454757022Z stderr F + '[' 0 -eq 0 ']'
2020-02-26T07:43:36.454795721Z stderr F + exec rabbitmq-server
2020-02-26T07:43:36.849021551Z stdout F ERROR: epmd error for host osh-openstack-rabbitmq-rabbitmq-0.rabbitmq.openstack.svc.cluster.local: nxdomain (non-existing domain)

In /etc/hosts file below, I just found localhost4, no localhost6.  Is it expected?

I added below line manually after the line of 127.0.0.1. However, it didn’t work☹

::1             localhost       localhost.localdomain localhost6 localhost6.localdomain6

# HEADER: This file was autogenerated at 2020-02-26 09:00:35 +0000
# HEADER: by puppet. While it can still be managed manually, it
# HEADER: is definitely not recommended.
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
fd01::1 controller
169.254.202.1 pxecontroller
fd00::3 oamcontroller
fd01::4 controller-platform-nfs
fd01::3 controller-1
fd01::2 controller-0
fd02::3 controller-1-cluster-host
fd02::2 controller-0-cluster-host
fd01::e8b6:66fe storage-0

I saw that in ./stx-puppet/puppet-manifests/src/modules/platform/manifests/config.pp:215

class platform::config::hosts

  inherits ::platform::config::params {

  # The localhost should resolve to the IPv4 loopback address only, therefore

# ensure the IPv6 address is removed from configured hosts

  resources { 'host': purge => true }

  $localhost = {

    'localhost' => {

      ip => '127.0.0.1',

      host_aliases => ['localhost.localdomain', 'localhost4', 'localhost4.localdomain4']

    },

  }

  $merged_hosts = merge($localhost, $hosts)

  create_resources('host', $merged_hosts, {})

}

Any one can give some help?

Thanks!
Zhipeng