[Nix-dev] NixOps usage survey.

[Domen Kožar]

I'm using NixOps to boot strap servers and then they auto upgrade based on
channels from Hydra:

https://github.com/snabblab/snabblab-nixos#automatic-deployments

On Wed, Sep 7, 2016 at 4:47 PM, zimbatm <zimbatm at zimbatm.com> wrote:

> I've been using NixOPS for my personal servers (on Vultr) and I couldn't
> be happier. I'm deploying a rails app and I never had a better experience
> than that, even on Heroku. The initial setup take a bit longer but it
> already paid back in terms of no-brainer deploys. I love it that I can
> share configuration between my own machine and servers and not have to
> worry about state.
>
> In a work context I think I would need a couple of more things.
>
> Because of how the nixos activation scripts are working it's quite hard to
> do zero-downtime deploys unless you have a load-balancer in front. Right
> now it takes down the old version and then boots the new version. It's
> simple but it also leaves a gap where users get 503 status codes.
>
> I would probably also setup a "deploy" gateway machine to keep the
> deployment centralized.
>
> One issue is that because NixOps is using a push model it doesn't work
> very well with auto-scaling. Usually in that setup the machine is pulling
> the configuration on boot. I think with a proper API interface on the
> deploy gateway it should be possible to handle that case but it's not
> supported out of the box.
>
>
> On Wed, 7 Sep 2016 at 11:37 Игорь Пашев <pashev.igor at gmail.com> wrote:
>
>> 2016-09-07 13:22 GMT+03:00 4levels <4levels at gmail.com>:
>> > We've been pleasantly surprised that every single deploy has given
>> identical
>> > results on all (currently 12) servers in the various datacenter
>> locations of
>> > Vultr.
>>
>>
>> Yeah, develop in VBox, deploy to everywhere. The other day I moved one
>> of the machines from EC2 to Hetzner... in the blink of an eye :-)
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