miércoles, agosto 01, 2012

Build Flow Jenkins Plugin

Este samba, Que é misto de maracatú, É samba de preto velho, Samba de preto tu (Mais que Nada - Sergio Mendes)
With the advent of Continuous Integration and Continuous Delivery, our builds are split into different steps creating the deployment pipeline. Some of these steps can be for example compile and run fast tests, run slow tests, run automated acceptance tests, or releasing the application, to cite a few.

Most of us we are using Jenkins/Hudson to implement Continuous Integration/Delivery, and we manage job orchestration combining some Jenkins plugins like build pipeline, parameterized-build, join or downstream-ext. We require configuring all of them which implies polluting the job configuration through multiple jobs, which takes the system configuration very complex to maintain.

Build Flow enables us to define an upper level flow item to manage job orchestration and link up rules, using a dedicated DSL.

Let's see a very simple example:

First step is installing the plugin.

Go to Jenkins -> Manage Jenkins -> Plugin Manager -> Available and find for CloudBees Build Flow plugin.

Then you can go to Jenkins -> New Job and you will see a new kind of job called Build Flow. In this example we are going to name it build-all-yy.

And now you only have to program using flow DSL how this job should orchestrate the other jobs.

In "Define build flow using flow DSL" input text you can specify the sequence of commands to execute.

In current example I have already created two jobs, one executing clean compile goal (yy-compile job name) and the other one executing javadoc goal (yy-javadoc job name). I know that this deployment pipeline is not real in a true environment but for now it is enough. 

Then we want javadoc job running after project is compiled.

To configure this we don't have to create any upstream or downstream actions, simply add next lines at DSL text area:


Save and execute build-all-yy job and both projects will be built in a sequential way.

Now suppose that we add a third job called yy-sonar which runs sonar goal that generates code quality sonar report. In this case it seems obvious that after project is compiled, generation of javadocs and code quality jobs can be run in parallel. So script is changed to:

parallel (

This plugin also supports more operations like retry (similar behaviour of retry-failed-job plugin) or guard-rescue, that it works mostly like a try+finally block. Also you can create parameterized builds, accessing to build execution or printing to Jenkins console. Next example will print build number of yy-compile job execution:

b = build("yy-compile")
out.println b.build.number

And finally you can also have a quick graphical overview of the execution in Status section. It is true that could be improved more, but for now it is acceptable, and can be used without any problem.

Build Flow plugin is in its early stages, in fact it is only at version 0.4. But will be a plugin to be considered in future, and I think it is good to know that it exists. Moreover is being developed by CloudBees folks so it is a guarantee of being fully supported by Jenkins.

We Keep Learning.

Warning: In order to run parallel tasks with the plugin Anonymous users must have Read Job access (Jenkins -> Manage Jenkins -> Configure System). There is an issue already inserted into Jira to fix this problem.

4 comentarios:

Siva dijo...

We are getting issue while build the parallel projects

b = build("framework")
out.println b.build.number
parallel (

Out put:
Started by user anonymous
Building in workspace D:\jenkins\workspace\build-flow
Trigger job framework

framework #6 completed
parallel {

Finished: FAILURE

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