On 23 June 2017 at 12:09, Andrew Wilkins <andrew.wilk...@canonical.com> wrote:
> >> *1. Does snapd work on all architectures that Juju supports?* >> >> The answer appears to be "yes with some caveats". For xenial onwards >> there are snapd packages for all the architectures the Juju team cares >> about. >> > > Ah, I thought the question was rather whether or not the mongo snap > existed for all of those architectures. I don't think it does. IIANM, the > snap comes from https://github.com/niemeyer/snaps/blob/master/ > mongodb/mongo32/snapcraft.yaml, which (if you look at the "mongodb" part, > appears to only exist for x86_64). So we would need to do some work on that > first. > I imagine we would have a custom MongoDB snap for Juju rather than using this one as is. We want direct control over the snap. The niemeyer snap would probably be a good starting point though. > >> https://packages.ubuntu.com/trusty-updates/snapd >> >> This is probably ok. I think it's probably fine to start saying that new >> Juju controllers, on some architectures at least, need to be based on >> xenial or later. >> > > Since the controller machine isn't designed for workloads, it seems fine > to me to restrict them to latest LTS. > > One issue would be upgrades: we would either have to continue supporting > both snaps and debs for mongodb, or we would have to disallow upgrading > from a system that doesn't support snaps. That would OK as long as there > are no workloads on the controller, as we could use migration. > This would certainly be a good case to use migrations. *2. Does snapd work inside LXD containers?* >> >> Although it's rarely done, it's possible to set up a Juju HA cluster >> where some nodes are running inside LXD containers so this is something >> we'd need to consider. >> > > It would suck if we couldn't test using the lxd provider, though. > /me slaps forehead for forgetting the more obvious use case. At any rate, snapd in LXD containers does seem to work from xenial onwards. - Menno
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