Re: [Userops] Why is it hard to move from one machine to another? An analysis.

[Dave Crossland]

On 9 Apr 2015 11:25 am, "Dave Thompson" <address@hidden> wrote:
>
> "Claes Wallin (韋嘉誠)" <address@hidden> writes:
>
> > Because services are not run as several instances by several users on
> > one machine, their state has been allowed to nestle itself into
> > several places on the system.
> >
> > This is why bundler/npm/virtualenv is often the best way to deploy,
> > because it isolates the application state (and dependencies) from the
> > system (and other installed services). Docker looked like it could be
> > a polyglot version of this, but I guess from what you are saying
> > people are not using it like that.
>
> I think there are much better ways that we can isolate application
> dependencies.  Bundler and co. are useful only because system package
> managers haven't traditionally allowed for installing to a directory
> that isn't '/'.  Language-specific package managers let you install
> anywhere, but they are so narrow in scope that you typically need to use
> more than one of them in addition to your distro's package manager to
> get any real work done.  So, a Ruby on Rails application with a
> _javascript_ client may need apt, npm, and bundler in order to obtain all
> of the pieces necessary for it to work.  Terrible.  The distros we use
> should provide a package manager that allow us to do this kind of
> dependency isolation with all packages, not just Ruby/Python/_javascript_
> stuff, while at the same de-duplicating the files used in multiple
> "bundles" throughout the system.  Then we'd only need one package
> manager.

That exists, it's called Docker :)

> --
> David Thompson
> Web Developer - Free Software Foundation - http://fsf.org
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