Open Stack

On Thu, Nov 10, 2022 at 11:52 AM Franck VEDEL <
franck.vedel at univ-grenoble-alpes.fr> wrote:

> Hello,
>
> yesterday I sent a desperate message about the functioning of my Openstack
> (kolla-ansible, yoga, centos8Stream).
> The situation is incomprehensible. For some accounts in some projects,
> everything works (creation of networks, subnets, dhcp configuration,
> instances, everything works).
> For other accounts, everything works except having an IP address per dhcp
> on a subnet.
> The servers have restarted following a power outage.
>
> I managed to put everything back together except those DHCP issues.
>
> As I can start from an empty configuration, how to reset everything ...
> for example with a command:
> kolla-ansible -i multinode ____________
>
> Or how to fix my configuration. It seems very complicated to me.
> I would like some opinions if possible.
> Thanks in advance
>
> Franck
>

Are you asking how to completely zero out your entire cluster and rebuild
it? That seems a bit drastic.

kolla-ansible destroy will nuke everything. Take a backup of /etc/kolla (or
wherever your inventory / globals.yml / passwords/yml is) first. Older
versions removed some things there when running destroy and I can't recall
when / if that changed.

How many controllers do you have?

Are you using OVS, OVN, or something else?

Are you using L3-HA? DVR?

Did all nodes have to be rebooted? If not, then which ones?

Have you confirmed there are no dead containers on any controllers? (
docker ps -a )

Have you looked in logs for ERROR messages? In particular:
neutron-server.log, neutron-dhcp-agent.log, nova-api.log, and
nova-compute.log ?

Strange things happen when time is out of sync. Verify all the nodes synced
properly to an NTP server. Big symptom of this is 'openstack hypervisor
list' will show hosts going up and down every few seconds.
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