Jenkins Google Summer of Code Office Hours, 2 Apr 2019

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From YouTube: Jenkins GSoC Q&A for students. April 02, 2019

Description

Regular Q&A session for students

A

Please wait for a while August okay. Now we are live. So this is a regular Belconnen session students, please April 2nd. So we have just one week before the application deadline and yep. We can just pass it through scorning.

B

Okay, so I want you to ask something about the fingerprinting in our tweet promotion. It is said it is. It has said that, like we can use fingerprinting to just track the promoted artifacts across Jenkins right, so I learned that in fingerprinting the producer and consumer that thing occurs right like producer. It just produces some sort of unique ID and consumer consumes that unique ID. So I I suppose that for this week we have to use the code Jenkins class, that is the fingerprint or Java, am I correct, sir.

B

We will be using fingerprint or Java from the Jenkins core put this okay.

A

C

A

So um in Jenkins court, where there is a koala scope, fingerprint Java yeah, so this costs effectively represents the entire fingerprint engine. There are few other classes, but ETA structure.

A

So he you might see that there is a few fields so there, so there is a pointer to the original view. So this the producer of the converging it points to whatever give the which created the first entree, and there is a timestamp when it was created.

A

In addition to that so yeah there is empty five, which is used as unique ID, and that is file name, which sherry is used, a certain representation. So there are some history in this Nene because additionally, fingerprint was created only for fingerprinting artifacts go here, for example, file, name gates, it has killed by ruling, but it's just a name for the presentation and other plugins like doctor stressed immediately continue names so there, for example,.

A

Some documentation may be yeah, so you may see that disability, which should use continued names as file names.

B

Ok, so what I did not understood about that guru is fingerprint or Java. It is taken like left and right, two different ranges right from start to n, plus 1 and from start minus 1 to n. What is the use of those two ranges? I cannot I. Do not understand that part if you scroll down with it a little bit this one loosen a bit down like there are two ranges that that's been described.

A

Maybe you want to show your strength because ok.

C

A

B

A

Okay, is it visible, sir? Yes,.

C

B

If this one is on this, one public range expand right and explained left this particularly I. Do not get this like. What is the use of these two ranges and later it just merges these two finds the intersection between these two ranges and find the union between these two. What is the actual purpose? Purpose of this I cannot figure out this. Yes, so.

A

How to figure it out? It's well I mean if it's just getting limited for some on your skis. So it's not a directly part of fingerprinted detail model, so you may see that it actually just which used additional ranges and if you want I, can show how to track down in usages of it. Yes, so I, don't think that it's something you should be aware of: okay, so yeah, that is right, expand left. So here you may see that it's just from start strength, so it adds increment.

A

But you may see that this method, actually it doesn't really modify the class. So just the returns new range why it exists. For starters, it's a good question, but yeah there is a button called blame and then going we can just see.

A

So you may see that there is a number of methods. It was created something like 13 years ago and.

A

Since that this matters has have not been redeemed, so we can check whether its methods are used to talk.

A

So here you may see that the only usage is inside the class I mean no obligated if ninja-esque or what does just expands to the range to include additional value due to whatever reason, so it's just a utility enter to reach it as, for example, another usage to the trace. That's it okay,.

B

So and next question is so: I can figure out how producer produces the new ID I can clearly see that down like md5sum. I can clearly see that, but how would the? How would a consumer relate with that ID? That I cannot figure out like producer okay, so you want to understand how producers are producing your ideas. Yes, I know I understood that, but but how would a consumer avail that ID, okay, so.

A

There is another class called fingerprint one.

A

So this class got from all other things includes a number of methods you may see here so when consumer wants to trace usages or whatever it may use this method, for example, to retrieve fingerprint, and you may see that ID is just passed from elsewhere. So it means that any question that should be able to somehow know the idea of fingerprint in order to retrieve that, and for example, here you may see get an idea so for files it uses md5.

A

So if consumer uses a file, you can recreate its md5 and hence it can retrieve IDE over the fingerprints and rated fingerprint from Jenkins just needs to know the file and pretty much the same when I use others, for example, in doctors, traceability plug-in. We just use continue, ladies because convenient IDs are giving it so that if we use for them as this key in order to treat fingerprints and father you suggests well, you would need to somehow create this unique ID. But here once it's created, you will be just using it.

B

Okay: okay, again talking about fingerprints, I, guess in the option, option pass condition low, downstream pass condition. What I saw was something class called pseudo downstream, builds pseudo downstream builds, and it says that it is like in conversation to the fingerprinting. How is it different than fingerprinting pseudo run shrimp dead? So should the downstream is used.

A

Folks should the trigger before recall correctly its legacy, implementation of triggers and jobs inside the Jenkins core, and we believe this is the only purpose for that and yeah I. Do not think that you should be really worried about it right now, so it's nice of it so should upstream what? If.

B

You don't feel bait. Okay,.

A

That's all it's for, let's see.

B

Capital P pseudo, downstream bills.

A

There's no such cause I.

B

Think capital piece.

A

D

Think you can change the spelling of Sodor.

B

Yes, the spelling of pseudo it script PS you do.

B

William agree on only for triggering yeah.

A

But so yeah we cannot finder because lately, if you want, we have probably just cannot rated popular but they shoot the triggers. They exist only for all triggers see in.

C

So while it doesn't through the short yep, so many she makes yeah.

A

Help you to do that, but the again yeah just this.

B

One this particularly pseudo down- she builds oh okay in inside downstream, pass condition. This okie.

A

E

The same is a transient downstream link.

A

Yeah, it's pretty much the same, so I understand why I was unable to find it because yeah was looking for. The drink is core part not for the plug-in code base, but yeah its implementation in promoted bills, which doesn't use fingerprints ancillary.

A

So we have, as we discussed in pain v1 months ago. So there are two ways who builds just is fingerprints. Another one is actions because actually is a system storage you can add to the built data, so we see the trigger you represent. It uses actions in order to store all references between usages. That's this.

B

Is the last question I'll ask and pass the question is.

A

B

A

So that apology have a chance to ask.

A

D

Ali today were to ask, if, like when, registering for Chuseok in the Google Website, is it sufficient to just upload my like college ID guard like just a scanned copy of it.

A

These questions, you should ask support. Okay,.

D

Because, like in the in their support, they have said it clearly like you can but like I thought like there, they were expecting something more authenticate. Yeah.

A

So we are not making decisions about student JSOC support team is doing better okay. So if it's not, can you please erased question to them and they will provide that response.

D

I was trying this cloudBees a folder plug-in. It was said, like you can wait, you can perform a job of folder organization, but I couldn't exactly follow. What like I could understand like it organizes the repository in form of a hierarchical structure of directories, but I wasn't able to like do anything with that. I I didn't able to figure out what.

A

D

One who write what it does like for the case of multi branch, plugin and sorry multi, when spy plane and single friends pipeline I was able to do something. I couldn't do anything.

A

So we have all those plug-in has two purposes. One is folders, for example, this report and Creusa folder and again we see that it's just a magnetic rated folder by folders plugin and holds a number of jobs inside. This is one of you user folders. Another usage. He is computed folder, so computed. All the very is just net direction class, which allows to somehow article great contents run ten pages. For example, if you open a Jing escort, you may see that there is it's a github organization.

A

Actually, it hot organization is a computed folder, so it uses folders plug-in as an API, but there is not a plug-in and which increments it and this engages folders. It just sounds it hop organizations or the risk. An organization walk if you're interested and we it like it's a repository according to the contribute rules so yeah. You may see that there is a bunch of stones there, but here and we get this project said it and the each disclose it. For example, Jenkins it's a jingle score. It's also computed folder.

A

This computers, holder, is multi branch pipeline. Actually- and here you may see that there are pull requests, so there are branches, so the builds are not configured by this repository, but yeh. You may see that there is quite a number of items, so all of these items have been also created by not branch pipeline, and it you just hold the right here in order to locate this stuff I'm, not sure where the answers, your question, but yeah I, just yeah.

D

That is like what I wanted to know like how does it function.

A

D

Order to make this project Oh what parameters do you have to supply in that section of creating that job in.

A

Multi branch pipeline.

D

No like when we create a new item, they there is option of creating a folder organization like I, couldn't able to follow what exactly did expect from me to supply like in case of multi branch pipeline. It was expecting me to supply repository who, like what do, is play to the folder organization. Yeah.

A

I hope I have each one should have it on this instance. Okay, so here let's take, for example, the brake horse. It's yeah, it's computer folder right now, but yeah we'll see what we have inside. So here you have a number of options to supply, but what is really needed? You need to specify here so here you might see you're asking about github organization, or are you asking about multi branch pipeline I'm.

D

Asking about like there is a option for folded like I, can I share my screen.

E

A

Project type ID has dropped.

B

A

Okay, let's give him okay.

D

Okay, so knows this exactly okay, so what I wanted to ask is like in this like, where I am running a Jenkins instance where, when I go for a new job, it like I, can select this folder and, like some name testing one so like what do is supply here? I, don't understand like there's no space.

A

D

A

Are you trying to achieve Lake you.

D

A

D

Folder organization.

A

Wally, if you want to have folders you just like.

D

Lexus because I want to like have a folder of multiple jobs. Okay,.

A

Do you want money, or do you want to create a motor Matilda.

A

A

They want to create these jobs, we want to create them automated.

D

A

Multi branch pipeline with organization.

D

That's all from I said thanks a lot.

A

D

Take leave now, okay, thank you. Yeah.

A

This meetings are optional, so yeah, if you have nothing, to ask, feel free to drop.

A

Okay, so let's place it was next question salvia, then that's how much time.

B

Should I start a band okay, so last question I'd like to ask, is in the proposal piece: it has said that update Jenkins release plug-in to use the new plug-in as an internal engine for doing promotions so that this plug-in can use the new plug-in internally. Sir I actually cannot get the gist of this line. So could you please explain.

C

A

C

You're asking about this line, write it a bill Jenkins. Yes, second last mm-hmm,.

A

Yeah, so that is really so.

A

A

Okay, so yeah, that was the release plug-in so release begin. A is one of vengeance.

A

A

But it's um much is Nikki's here now, so this plug-in actually allows to trigger a big E's other step. You can just take a look where the wrists I'm just looking for the documentation so to simplify the presentation, but it's something that week is really softly.

A

That's all what about effectively. This plug-in allows us to trigger another job as a release step. So nice job me see that few additional steps being added like people started before the release after the release. But you know what actually gets for any complete job. You get important release and this release bottom allows trinket.

A

Another job is adding some parameters, so it's pretty much what kinetic build stones, but you use external job and once we have new, promoted bills, bunion you actually can replace the function and in the release for you along the same structure so but yeah just users and existing fighting under the hood, so that we didn't have the kitchen all the functionality.

A

B

So I have to update the plug-in to use it as an internal engine in like what does that mean like again as an internal engine, so.

A

What it means that yeah you create a new plug-in here, came then in a very nice plugin, you added dependency on your new, your plugin, so that it uses it. Cp is not release plug-in. So here what you have you have a definition of triggering the build so like here. So there is a button button. Currently it triggers another job, sending a little like the notified promotion plug-in would be doing once it's completed so effectively. At least blinking could use new promoted, builds plug-in to do the same thing going. Okay, so.

C

B

Yep, this will be used as triggering a promotion. The new, updated yep I would.

C

Expect so, okay, so thank you. Thank you. This is all like look at us. Okay,.

A

Oh yeah haven't tried to this button, yet please do because he give you more ideas about how promotion should work, because we originally, we just wanted to merge these two plugins, but.

A

Information and ideas.

E

One one thing to have in in mind is also the built pipeline can plug-in where you have this promotion step, so the downstream is actually can either be triggered as a parameter eyes in normal conditions, but you actually also have a manual the downstream which create a a button on the wall pipelines and you can only trigger it. The next job in case it's successful.

E

This is my, you could say mental baseline about the promotion. In that sense,.

B

It will work the same as freestyle projects like upstream and downstream conditions.

E

Yes, it works on Ostrom upstream downstream, but the you could say the the mechanism or the mental mechanism of what is trying to achieve is that you can run automatically to a certain point which the particular pipeline is doing today. But what is missing is that you don't have this push the next level of built, which could be a release. It could be a deployment it could be whatever, but it's based on a manual decision.

A

E

That was what I discussed in the indicator channel as well, that the triggering can be either a push or a pull mechanism. Either you are subscribing for new artifacts, which is. Is there a new fingerprint of that of that artifact? That I need is that a jar file or whatever, which has been the had a certain quality or labels or whatever, or you can actually have a push mechanism, meaning that you have a button and then you trigger, like a downstream pipeline, saying okay, now take off giving this fingerprint so they're tied together.

A

E

It make sense or like it.

A

Makes sense so.

E

That, that's my you could say my mental baseline, about what we're trying to achieve.

C

Okay, thank you, sir.

E

Do you know this plugin.

B

E

Go p-- pipeline. Yes,.

B

Sir, yes, sir I've gone through it.

B

Okay, so if there are any further queries, I'll ask him tomorrow section so now me and you, sir cuz I, have my class after, like 10 minutes, I have to cook. Okay, that's.

C

Fine okay! Thank you very much, sir. Thank you. Thank you.

A

Okay for the punch, I still own line, yes,.

E

A

F

Said I wanted to take the feedback on my proposal that I was team. Currently it was the whole project now. Do you want me to add any part, specific, visible parts in glad.

A

So, do you see my screen.

F

A

So, just to provide some context to Klaus yeah. We have two active students interested in the role based strategy plug-in hormones. Though there are ongoing proposals and yeah. There is a proposal from the branch so yeah I mean it include several topics.

A

So yeah he concludes performance test and benchmarking and somewhere I performance improvements. Pretty much like another proposal, so yeah, they're they're, one of the topics feel happy that, since you have two students, both of them have been active during today, even before g-shock was officially announced and yeah the proposals over love for one of the proposed.

A

One of the recommendations we had to students is to work a bit in order to see whether they can submit non-conflicting proposals, because the a performance is a the variant of injuries are great yeah, try not to yeah, so we had one iteration on that and I believe that we are waiting for another iteration, so yeah. If you ask me, the punch water is needed to be done in this proposal formally, and nothing is needed to be done. So you are dressed all the main sections well except this problem.

A

F

I'm not yet got the calendar for the next semester, so I was waiting for that. You'll pull that action.

A

Yeah, that's right, but.

A

About your availability, so it's fine! You know what would be my recommendation regarding this proposal. Yeah, yes, still work to see whether you want whether you boss want and whether you can have non-conflicting proposals, because we you may both wanted to proceed with the same proposals is perfectly fine, but since we are talking about open source and collaboration, maybe you want to collaborate and somehow ensure that most projects could be accepted begin or generally your choice.

A

As I said in the Gator chat, we can only advise and he discussed few options before like having, for example, performance testing framework at search is one project. Another project is which actually performance improvements because well in such case, projects can be pretty much independent.

A

This is one of the options you guys may want to discuss and if you want to discuss other options and happy to do that,.

F

Slapping you we foil for the same, but I am not yet we get. God has a sponge, but when I, when I get the response, I will talk to him about that and you, you said about arranging a coil. That would be great.

A

F

A coil you send you say now we can arrange a cordon here.

A

We consider all yes, so for me, it's a bit difficult for these weeks, but ya know try to attend.

A

Really not like the last time when I was in the middle of traveling in the bus, a denier so yep I'll do my best to attend.

F

Specific two dates, desperate so in the code in the role map the Java file, there's a there's, a functioning and boletus IDs I needed to know what it does exactly. What.

D

Exactly sorry, sir.

F

In the, if you could open the data code, sleep, oh okay,.

F

Don't mess our file.

A

F

There's a function name delicious IDs in such what does it do initially, in my view, would just I traits over the rules and cons. I said in this removes IDs. Only from that checked the front edge said.

A

Yes always seem so it goes through all the roads and they pick so I think that it just removes all assignments, so it means you have I, see I coat in Turkey to tour username and it goes through all the roles inside this roadmap and then, if there is acetic just remove it, that's it so we effect it's not yeah.

F

It's not removing from the role map. Now it's moving from the side formed above s IDs, it's pretty much the same so.

A

Here you may see that there is no patient right now for this level, so it goes through all gross and then remove assignments. So, let's take a look here. Yeah, you may see that yeah. This is okay. This is a fish but he's a granddaughter obstruction. So we are all grounded Rose kept in this structure, and here you may see that we just go through all items in this roles and the remove seeds from the set so attacker. It means that you remove seeds from the role map, because there is no.

F

F

An idea to a proposal for caching of the role map object. True yeah, the same.

A

As that yeah, if you start Asian Caroll's, if you start occasionally admissions on a higher level, then yes, there may be additional the Americanization of this data and then you might need to update all API scores to handle all this data properly.

F

Yes, I doubt that.

A

But yeah right now they will so not sufficient. So yeah, it's pretty simple to something.

E

A

Okay, do you have any other questions about the code structure.

F

Notion all right, Shh I'm, going through it now I'm familiar with writing. Okay,.

A

So yeah, then thanks for the question, so you have some time left. So maybe we could sync up with calls about the project. If there is no questions left.

F

Ethan it from my height, oh.

E

Yeah I can hang in Yeah.

A

Right, so if you want a, you can just stop the broadcast, because it's not really really funny. Okay, then yeah thanks everyone who was watching just stop it.