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<div class="moz-cite-prefix">Le 27/10/2016 à 17:33, Aaron Ogle a
écrit :<br>
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cite="mid:CAGX5j1zgPh8R0o5n_8pDNTqCbjASj3rja3rLNZrMKDOXkOuS6w@mail.gmail.com"
type="cite">
<div dir="ltr">Didier:
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<div>This sounds like exactly what I wanted! So once this lands
I will be able to just use: <span
style="color:rgb(24,54,145);background-color:rgb(247,247,247);font-family:consolas,"liberation
mono",menlo,courier,monospace;font-size:13.6px">snapctl
get value</span> to get user set information?</div>
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Exactly!<br>
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cite="mid:CAGX5j1zgPh8R0o5n_8pDNTqCbjASj3rja3rLNZrMKDOXkOuS6w@mail.gmail.com"
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<div>Will the snapctl command be available anywhere in the snap
or only in the hooks?</div>
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<br>
I guess the main intent is to use them primarily in hooks, but
nothing should prevent it to be available in your other snap daemon
as well (as it's part of the core rootfs).<br>
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<div>Also the upgrade hook looks like it could be a thing of
beauty. Any plans for a downgrade hook?</div>
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<br>
I don't know about any plan for that, I'll let others answer. I
think you mean a downgrade hook being executed after a snap revert
to fetch back "newer data" that could be lost in the revert process
and transfer back to the older version? Or do you have any other use
case in mind?<br>
<br>
Didier<br>
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cite="mid:CAGX5j1zgPh8R0o5n_8pDNTqCbjASj3rja3rLNZrMKDOXkOuS6w@mail.gmail.com"
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<div class="gmail_quote">
<div dir="ltr">On Thu, Oct 27, 2016 at 10:14 AM Didier Roche
<<a moz-do-not-send="true"
href="mailto:didrocks@ubuntu.com">didrocks@ubuntu.com</a>>
wrote:<br>
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<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Le
27/10/2016 à 16:50, Aaron Ogle a écrit :<br class="gmail_msg">
> Greetings,<br class="gmail_msg">
><br class="gmail_msg">
> With our Rocket.Chat snap, we're looking to be able to
allow someone<br class="gmail_msg">
> to run an external mongodb instead of the built in one.
As well as<br class="gmail_msg">
> we'd like to add something like caddy / traefik etc to do
ssl<br class="gmail_msg">
> termination. But its not a daemon we would want enabled
out of the<br class="gmail_msg">
> box because of the effect on existing users.<br
class="gmail_msg">
><br class="gmail_msg">
> So basically looking for a way let the user of a snap
enable or<br class="gmail_msg">
> disable two different daemons in our snap.<br
class="gmail_msg">
><br class="gmail_msg">
> Is this possible using anything out of the box? Or would
I have to<br class="gmail_msg">
> make the command ran in the daemon look at an environment
variable /<br class="gmail_msg">
> file etc. and determine if it should make the daemon just
exit?<br class="gmail_msg">
><br class="gmail_msg">
> How have others handled this? Or allowing users to
customize snap<br class="gmail_msg">
> behaviour?<br class="gmail_msg">
<br class="gmail_msg">
Hey Aaron,<br class="gmail_msg">
<br class="gmail_msg">
sounds like a great plan for usability!<br class="gmail_msg">
<br class="gmail_msg">
I would suggest using configure hooks to proceed that. Hooks
are just a<br class="gmail_msg">
way for users to set variable=value. Based on that, you can
control your<br class="gmail_msg">
daemon with a configure script (triggered by this command)
inside your<br class="gmail_msg">
snap. This one can triggers start and stop inside a mongodb
daemon<br class="gmail_msg">
wrapper (waiting for a certain value to be passed for instance
before<br class="gmail_msg">
executing the real daemon).<br class="gmail_msg">
<br class="gmail_msg">
The documentation is not yet published on <a
moz-do-not-send="true" href="http://snapcraft.io"
rel="noreferrer" class="gmail_msg" target="_blank">snapcraft.io</a>
AFAIK, but is<br class="gmail_msg">
available there:<br class="gmail_msg">
<a moz-do-not-send="true"
href="https://github.com/snapcore/snapd/blob/master/docs/hooks.md"
rel="noreferrer" class="gmail_msg" target="_blank">https://github.com/snapcore/snapd/blob/master/docs/hooks.md</a>.<br
class="gmail_msg">
<br class="gmail_msg">
However, please keep in mind about this bug<br
class="gmail_msg">
<a moz-do-not-send="true"
href="https://bugs.launchpad.net/snappy/+bug/1636931"
rel="noreferrer" class="gmail_msg" target="_blank">https://bugs.launchpad.net/snappy/+bug/1636931</a>,
we need a new core image<br class="gmail_msg">
to have snapctl available from your snap, and so, you won't be
able to<br class="gmail_msg">
experiment it right away.<br class="gmail_msg">
<br class="gmail_msg">
I'll probably write a codelab on this precise topic in a
couple of weeks<br class="gmail_msg">
FYI (once the feature is really available to users and
developers).<br class="gmail_msg">
Cheers,<br class="gmail_msg">
Didier<br class="gmail_msg">
<br class="gmail_msg">
<br class="gmail_msg">
--<br class="gmail_msg">
Snapcraft mailing list<br class="gmail_msg">
<a moz-do-not-send="true"
href="mailto:Snapcraft@lists.snapcraft.io" class="gmail_msg"
target="_blank">Snapcraft@lists.snapcraft.io</a><br
class="gmail_msg">
Modify settings or unsubscribe at: <a moz-do-not-send="true"
href="https://lists.ubuntu.com/mailman/listinfo/snapcraft"
rel="noreferrer" class="gmail_msg" target="_blank">https://lists.ubuntu.com/mailman/listinfo/snapcraft</a><br
class="gmail_msg">
</blockquote>
</div>
<div dir="ltr">-- <br>
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<div data-smartmail="gmail_signature">
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<td style="padding-right:15px"> <img
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style="width: 80px; display: block; margin-left:
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<td style="padding:3px 0px
10px;margin:0px;font-family:verdana,geneva,sans-serif;font-size:12px;color:rgb(86,97,120)">
<b style="display:block;font-size:12px">Aaron
Ogle</b> <span
style="color:rgb(153,153,153);font-size:10px;display:block">Core
Developer</span> </td>
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<p style="margin:0px;padding:0px"><a
moz-do-not-send="true"
href="mailto:aaron.ogle@rocket.chat"
style="color:rgb(156,160,172);font-size:10px"
target="_blank">aaron.ogle@rocket.chat</a></p>
</td>
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<td style="padding:0px 0px 2px;margin:0px">
<p style="margin:0px;padding:0px"><a
moz-do-not-send="true"
href="https://demo.rocket.chat/direct/aaron.ogle"
style="color:rgb(156,160,172);font-size:10px" target="_blank">@aaron.ogle</a></p>
</td>
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<p style="margin:0px;padding:0px"><a
moz-do-not-send="true"
href="https://rocket.chat"
style="color:rgb(156,160,172);font-size:10px"
target="_blank">https://rocket.chat</a></p>
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