What happens for your app when the core is refreshed
The core snap is universally installed on every machine that runs any snap applications. That snap provides the root filesystem which is used as a base of the execution environment of all snap application processes. Most snaps use the core as the base though technically we can now offer other base snaps, as ubuntu 18.04 approaches this will be more and more visible but for now we will just ignore that aspect.
The fine art of herding spherical mount namespaces in vacuum
This post is somewhat technical but may help application developers to peek under the hood of snapd and see the system in a more complete way. Hopefully it will be of use to more than my closest friends and colleagues.
Snap execution environment, 2.0 It’s not really 2.0, but it sounds nice to say that since many people discussed the existing environment in various formats and with varying degrees of correctness and depth.
See how the core snap is released when it's time to do so
Core snap release mechanics The core snap release is still partially manual. Ideally we’d have some tools but this is also too precious to do with awk/sed and not yet directly supported by snapcraft (the all-architectures aspect). As such we still do it by hand. Due to exceptional circumstances I will now release 2.30 core snap for you.
First of all you need snapcraft and you need to be authenticated.
Yesterday I decided to build snapd for CentOS 7. Originally titled the post “… in ten minutes” but the process took more like an hour to complete as I wanted to fix some rough edges I found along the way. One day later the improvements and bug fixes I had made are merged upstream and I can tell my story.
Preparations All of the instructions that follow were done on a stock CentOS 7 installation, running kernel 3.
Classic? Before we can discuss today’s topic I need to untangle a rather confusing concept. Snapd cares about naming a lot. We really try to do our best to name things in a consistent and clear way. We don’t like to create error messages from hell and force the user to google crap to understand what the computer just said.
Well, we didn’t get one thing right though: the term classic, currently, may refer to:
The story about getting snappy into other distributions
A while ago I compiled a wiki page that documents where are we with support of snapd on various popular distributions.
Unfortunately the table there may look a bit bleak. Apart from Ubuntu and Debian most of the other distributions don’t ship snapd today. Since a few people were asking me about this (after all I was supposed to get this to work). I think some explanations are in order.