Re: Proposal: Hosting Jenkinsfile Runner "Image packs" in jenkinsci

[Oleg Nenashev]

Thanks to everyone who provided feedback in this thread and in other 
channels.
I went ahead and moved the repository, now it is located 
on https://github.com/jenkinsci/jenkinsfile-runner-image-packs

I will proceed with further development in the Jenkins repo, all 
preview/incubating disclaimers will be applied for foreseeable future.

Best regards,
Oleg


On Monday, October 5, 2020 at 4:51:46 PM UTC+2 Jesse Glick wrote:

> On Mon, Oct 5, 2020 at 3:38 AM Oleg Nenashev  wrote:
> > jenkinsci/jnlp-agents […has] images for Maven, Ruby, .NET Core, Python. 
> Node.js, etc.
>
> I see. For example:
>
> https://hub.docker.com/r/jenkins/jnlp-agent-ruby
>
> https://github.com/jenkinsci/jnlp-agents/blob/34919e3fd9c28716ca49e1777eec6eb6eefa0635/ruby/Dockerfile#L3-L8
>
> Useful for single-container agents. (For the `kubernetes` plugin we
> typically encourage use of the `container` step so that the neutral
> `jenkins/inbound-agent` is used with a third-party image in the pod.
> Suffers from `ENTRYPOINT` and `USER` and `VOLUME` problems just like
> the `withDockerContainer` step, as opposed to the style exemplified by
> the `dockerNode` step; neither option is attractive but it is hard to
> shoehorn Jenkins Remoting & workspaces into a container world.)
>
> > These images will be hosted in the experimental DockerHub org 
> (jenkins4eval)
>
> Yes, makes sense.
>

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Re: Proposal: Hosting Jenkinsfile Runner "Image packs" in jenkinsci

[Jesse Glick]

On Mon, Oct 5, 2020 at 3:38 AM Oleg Nenashev  wrote:
> jenkinsci/jnlp-agents […has] images for Maven, Ruby, .NET Core, Python. 
> Node.js, etc.

I see. For example:

https://hub.docker.com/r/jenkins/jnlp-agent-ruby
https://github.com/jenkinsci/jnlp-agents/blob/34919e3fd9c28716ca49e1777eec6eb6eefa0635/ruby/Dockerfile#L3-L8

Useful for single-container agents. (For the `kubernetes` plugin we
typically encourage use of the `container` step so that the neutral
`jenkins/inbound-agent` is used with a third-party image in the pod.
Suffers from `ENTRYPOINT` and `USER` and `VOLUME` problems just like
the `withDockerContainer` step, as opposed to the style exemplified by
the `dockerNode` step; neither option is attractive but it is hard to
shoehorn Jenkins Remoting & workspaces into a container world.)

> These images will be hosted in the experimental DockerHub org (jenkins4eval)

Yes, makes sense.

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Re: Proposal: Hosting Jenkinsfile Runner "Image packs" in jenkinsci

[Oleg Nenashev]

Hi Jesse,

There are official images like jenkinsci/docker-ssh-agent 
 or 
jenkinsci/docker-inbound-agent  
. They are 
technology-neutral. jenkinsci/jnlp-agents 
 is a separate story, because it 
actually provides technology-specific images hosted within the official 
Jenkins DockerHub account. There are images for Maven, Ruby, .NET Core, 
Python. Node.js, etc. there. So these images are well aligned with what U 
suggest for Jenkinsfile Runner.

To address concerns about supportability, I have no intent to publish the 
provided images as "official" ones in foreseeable future. Jenkinsfile 
Runner 1.0 and new packaging flows need to be released first. These images 
will be hosted in the experimental DockerHub org (jenkins4eval), and the 
documentation will include proper disclaimers. I hope it addresses your 
concern.

Best regards,
Oleg


On Friday, October 2, 2020 at 4:22:16 PM UTC+2 Jesse Glick wrote:

> On Fri, Oct 2, 2020 at 8:50 AM Oleg Nenashev  wrote:
> > We already have similar images for inbound agents 
> (jenkinsci/jnlp-agents).
>
> Well, not sure how similar—the official agent images are
> technology-neutral, so have an entirely different scale of maintenance
> effort involved. I think what you are proposing is more akin to
> hosting and maintaining official Docker images such as `maven`.
>

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Re: Proposal: Hosting Jenkinsfile Runner "Image packs" in jenkinsci

[Jesse Glick]

On Fri, Oct 2, 2020 at 8:50 AM Oleg Nenashev  wrote:
> We already have similar images for inbound agents (jenkinsci/jnlp-agents).

Well, not sure how similar—the official agent images are
technology-neutral, so have an entirely different scale of maintenance
effort involved. I think what you are proposing is more akin to
hosting and maintaining official Docker images such as `maven`.

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Re: Proposal: Hosting Jenkinsfile Runner "Image packs" in jenkinsci

[Slide]

Hi Oleg,

I think it would be gre a t to host it in the jenkinsci org. I think the
name is fine as well.

Regards,

Alex

On Fri, Oct 2, 2020, 05:50 Oleg Nenashev  wrote:

> Hi all,
>
> I am currently working on Jenkinsfile Runner
>  and finalizing the key
> feature requests towards the 1.0 release. One of the common use-cases is
> having community-provided images which would support common pipelines, e.g.
> building Java projects with Maven (issue #344
> ). We already
> have similar images for inbound agents (jenkinsci/jnlp-agents
> ). Jenkins X 1.x also included
> multiple images for Jenkinsfile Runner in jenkins-x/jenkins-x-serverless
> .
>
> I have created a first image for Maven/JDK8 in
> oleg-nenashev/jenkinsfile-runner-image-packs
> . It is
> based on ci.jenkins.io-runner, but without Jenkins-specific magic. Would
> appreciate feedback and contributions. A few questions to others:
>
>- *Hosting.* I would like to move this repository to the jenkinsci
>GitHub organization so that the repo could be accessible to users and
>contributors there. Would othersbe fine with that?
>- *Terminology*. I currently use the "Image Pack" terminology. Similar
>repositories use "Buildpacks" in Jenkins X and K8s, "Convenience Images"
>from CircleCI. I do not want to use "buildpacks" to avoid
>possible confusion with https://buildpacks.io/ . If anyone has ideas
>about better naming, would appreciate them.
>
> Any other feedback will be also appreciated.
>
> Thanks for your time,
> Oleg
>
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> 
> .
>

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Proposal: Hosting Jenkinsfile Runner "Image packs" in jenkinsci

[Oleg Nenashev]

Hi all,

I am currently working on Jenkinsfile Runner
 and finalizing the key
feature requests towards the 1.0 release. One of the common use-cases is
having community-provided images which would support common pipelines, e.g.
building Java projects with Maven (issue #344
). We already
have similar images for inbound agents (jenkinsci/jnlp-agents
). Jenkins X 1.x also included
multiple images for Jenkinsfile Runner in jenkins-x/jenkins-x-serverless
.

I have created a first image for Maven/JDK8 in
oleg-nenashev/jenkinsfile-runner-image-packs
. It is
based on ci.jenkins.io-runner, but without Jenkins-specific magic. Would
appreciate feedback and contributions. A few questions to others:

   - *Hosting.* I would like to move this repository to the jenkinsci
   GitHub organization so that the repo could be accessible to users and
   contributors there. Would othersbe fine with that?
   - *Terminology*. I currently use the "Image Pack" terminology. Similar
   repositories use "Buildpacks" in Jenkins X and K8s, "Convenience Images"
   from CircleCI. I do not want to use "buildpacks" to avoid
   possible confusion with https://buildpacks.io/ . If anyone has ideas
   about better naming, would appreciate them.

Any other feedback will be also appreciated.

Thanks for your time,
Oleg

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