Update a runtime image

[Gunnar Morling]

Hi Thomas,

What I've found helpful is the ability to amend or override the set of
modules contained in a modular runtime image via --module-path and
--upgrade-module-path.

If you use (Docker) containers to deploy your app, this can be employed
nicely to separate images with your app's dependencies (as a modular
runtime image) and a very thin image with your app itself. Unless your
dependencies change, only the latter one needs to be re-built and
distributed. The "exclude-resources" plug-in comes in handy for omitting
your app from the modular runtime image. I've written about it here:
https://github.com/moditect/moditect/wiki/Creating-dependency-images.

--Gunnar


2018-01-07 18:23 GMT+01:00 Thomas Brand <tom at trellis.ch>:

> On Sun, December 31, 2017 17:13, Remi Forax wrote:
> > jlink is not a distribution tool, you need to use a tool on top of jlink,
> > in the past, i've used the rpm format for that.
> >
> > We have stopped to distribute deltas when we have moved to docker that as
> > far as i know as no concept of incremental update.
> >
> > Rémi
> >
> >
> > ----- Mail original -----
> >
> >> De: "Alan Bateman" <Alan.Bateman at oracle.com>
> >> À: "Thomas Brand" <tom at trellis.ch>, "jigsaw-dev"
> >> <jigsaw-dev at openjdk.java.net>
> >> Envoyé: Dimanche 31 Décembre 2017 16:55:37
> >> Objet: Re: Update a runtime image
> >>
> >
> >> On 31/12/2017 15:42, Thomas Brand wrote:
> >>
> >>> Hello, I have a question related to jlink.
> >>>
> >>>
> >>> In a scenario where a runnable image created with jlink is installed,
> >>> and it should be updated, what are good strategies for doing this?
> >>>
> >>> I think if an update will introduce new dependencies this will be
> >>> different to updates that are known to be satisfied with what is
> >>> already in the image.
> >>>
> >>> The idea is to 'ship' just a small sort of diff / replacement part
> >>> that can be applied to the 'old' image to become 'new'.
> >>>
> >> The jlink tool always generates a new run-time image, there is no
> >> support at this time to install additional modules into a run-time
> >> image.
> >>
> >> -Alan.
> >>
>
> Thanks for the facts & suggestions!
> Greetings
>
>
>
>
>