Open Stack

On Wed, 2021-09-01 at 19:28 +0200, Radosław Piliszek wrote:
> On Wed, Sep 1, 2021 at 6:08 PM Paolo Celati <paolo at celati.com> wrote:
> > 
> > Hi Michal,
> > 
> >   Yes I would rather run all my Docker containers on the physical hosts.  At the moment I run Ceph and kolla images, but adding Swarm as well would be useful.
> > 
> > I've had a fair number of problems with Magnum because it appears only Kubernetes is supported nowadays, and I have 0 experience with that.  I also prefer Swarm because it's a lot simpler for small scale.
> > 
> > Administering my own VMs with Docker Swarm on top is also not exactly the best solution because that introduces extra machines to maintain.  And I don't have lots of spare RAM either as it's a homelab.
> > 
> > Thanks for reminding me about tagging correctly, I forgot to put [kuryr].  Ok didn't know about the lack of CI but good to know.
> 
> We actually *do* test Kuryr in CI - in the Zun scenario - and it
> works, at least on CentOS, it fails on Ubuntu for some reason but we
> don't have anyone to take care of that...
> Zun works using the on-host Docker as you want to do.

I had a feeling that Zun is using kuryr-libnetwork, which is a
different thing than kuryr itself. If the question if about kuryr-
libnetwork, then it's maintained better and Hongbin Lu is an expert to
try contacting with. Ping us on #openstack-kuryr and we'll try to get
you his whereabouts.

> *But* as Michał Dulko (hah, had to add the surname to differentiate
> ;-) ) said non-Kubernetes Kuryr is largely unmaintained and, actually,
> a similar statement applies to Zun...
> Your mileage may vary but going forward I advise you take the time to
> learn Kubernetes.
> As for mixing up Docker Swarm with Kolla Ansible, that's not really
> supported either. Kolla Ansible is designed to deploy to a bunch of
> standalone Docker daemons using only host networking.
> It could work but it's not tested.
> 
> -yoctozepto
> 
> > 
> > Kind regards,
> > 
> > Paolo
> > 
> > 
> > On 01/09/2021 15:57, Michał Nasiadka wrote:
> > 
> > Hi Paolo,
> > 
> > Would you like to use the Docker engine that is running on the OpenStack cluster hosts, or create Virtual Machines that will be used for a Docker Swarm cluster?
> > I would propose the latter.
> > 
> > About Kuryr - we don’t have CI coverage for testing Kuryr in Kolla-Ansible deployment, so the container images and Ansible deployment role are provided as-is currently.
> > 
> > Maybe somebody from Kuryr project could help you out? Adding [kuryr] tag for visibility.
> > 
> > Best regards,
> > 
> > Michal
> > On 1 Sep 2021, 00:32 +0200, Paolo Celati <paolo at celati.com>, wrote:
> > 
> > Hi,
> > 
> > long story short I have a 3 node Openstack cluster that I manage with kolla-ansible, and I'd like to run Docker Swarm on that as well. I am aware Magnum exists, but I'd first like to get my head around this simpler case.
> > 
> > Seeing as I'd like to connect Docker containers from swarm compose files to Neutron networks I'm trying to set up Kuryr together with a swarm configuration. However the documentation is a little scarce and I'd prefer running everything on these three hosts, including etcd. If I follow the guide and pass --cluster-store and --cluster-advertise arguments to dockerd then I can't run Docker in Swarm mode because I get an error saying Swarm is incompatible with those options, and at the same time it's not clear from documentation how you are expected to do Kuryr+Swarm. I did initialise the Swarm cluster before trying to add Kuryr, so I don't know if perhaps doing this the other way works? Do you have ideas or advice with this scenario? If worst comes to worst I can set up an external etcd cluster on a separate non-Openstack cluster but I'd rather avoid that.
> > 
> > 
> > Thanks in advance,
> > 
> > Paolo
>