Thanks for following up, Dave, Michael, and Jonathan. On Sun, 26 Jun 2016 at 11:04 Jonathan Ellis <jbel...@gmail.com> wrote:
> Is Snap a new packaging format like deb/rpm, or does it consume the > existing deb package? > It's a new packaging format. Each application is isolated such that it cannot see beyond its own filesystem (mounted squashfs plus writable directory), make certain syscalls, etc. It is not whole operating system isolation like docker and lxc, and there's ongoing work to let you run snaps inside these containers: https://github.com/lxc/lxd/issues/1952 That said, you can already run it just fine inside a cloud instance. On Mon, 27 Jun 2016 at 09:59 Jonathan Ellis <jbel...@gmail.com> wrote: > How would I deploy a cluster with Snap? > There's no native support for scaling out a single snap process yet, but it can be accomplished by holding a little extra logic in the snap. I'll look into this tonight using the Cassandra snap. With the package I can pre-deploy my configuration to the node with cluster > name, seeds, etc. With Snap do I have to build a custom container to do > that? Or is there some way to pull in config from the host machine or a > config server? > Today you'd build a container and call: cat cassandra.yaml | sudo /snap/bin/cassandra.config-set cassandra.yaml In the future there will be native support in snapd for setting config, and I could see a path to that optionally being a pull rather than push operation. Aside: there's at 3 other reasonably popular projects called Snap; makes it > hard to Google. > I've found this frustrating too. More documentation is being written under the "snapcraft" branding, which should improve discoverability some. On Sun, 26 Jun 2016 at 12:51 Dave Brosius <dbros...@mebigfatguy.com> wrote: > I notice that snapcraft.io already lists Cassandra as having a snap > available on the front page. Yes, I've already built and published a Cassandra snap [1]. I'd like to prove that this is low maintenance enough that the Cassandra release team could take over version bumping and publishing without being further burdened. 1: https://github.com/evandandrea/cassandra-snap/ On Mon, 27 Jun 2016 at 10:15 Michael Shuler <mich...@pbandjelly.org> wrote: > I haven't played with snap at all, yet, so maybe Evan could elaborate, > but building your own snapshots appears to be pretty straightforward. > If I understand the context you're applying to snapshots, that will be specific to your container system / cloud. That said, new versions of snaps unpack to new directories, and snapd lets you roll forward and back. I'm not sure about hosting your own snap service, but I assume would be > the way to go for customized deployments. There's a centralised "store" for snaps, which is nice for app discovery. If your deployment is locked down to not pull from the Internet, you can run your own store: http://blog.dustinkirkland.com/2016/06/howto-host-your-own-snap-store.html
