Accelerate with Gerrit DevOps Analytics, in one click!

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Accelerating your time to market while delivering high-quality products is vital for any company of any size. This fast pacing and always evolving world relies on getting quicker and better in the production pipeline of the products. The whole DevOps and Lean methodologies help to achieve the speed and quality needed by continuously improving the process in a so-called feedback loop. The faster the cycle, the quicker is the ability to achieve the competitive advantage to outperform and beat the competition.

It is fundamental to have a scientific approach and put metrics in place to measure and monitor the progress of the different actors in the whole software lifecycle and delivery pipeline.

Gerrit DevOps Analytics (GDA) to the rescue

We need data to build metrics to design our continuous improvement lifecycle around it. We need to juice information from all the components we use, directly or indirectly, on a daily basis:

  • SCM/VCS (Source and Configuration Management, Version Control System)
    how many commits are going through the pipeline?
  • Code Review
    what’s the lead time for a piece of code to get validated?
    How are people interacting and cooperating around the code?
  • Issue tracker (e.g. Jira)
    how long does it take the end-to-end lifecycle outside the development, from idea to production?

Getting logs from these sources and understanding what they are telling us is fundamental to anticipate delays in deliveries, evaluate the risk of a product release and make changes in the organization to accelerate the teams’ productivity. That is not an easy task.

Gerrit DevOps Analytics (aka GDA) is an OpenSource solution for collecting data, aggregating them based on different dimensions and expose meaningful metrics in a timely fashion.

GDA is part of the Gerrit Code Review ecosystem and has been presented during the last Gerrit User Summit 2018 at Cloudera HQ in Palo Alto. However, GDA is not limited to Gerrit and is aiming at integrating and processing any information coming from other version control and code-review systems, including GitLab, GitHub and BitBucket.

Case study: GDA applied to the Gerrit Code Review project

One of the golden rules of Lean and DevOps is continuous improvement: “eating your dog food” is the perfect way to measure the progress of the solution by using its outcome in our daily life of developing GDA.

As part of the Gerrit project, I have been working with GerritForge to create Open Source tools to develop the GDA dashboards. These are based on events coming from Gerrit and Git, but we also extract data coming from the CI system, the Issue tracker. These tools include the ETL, for the data extraction and the presentation of the data.

As you will see in the examples Gerrit is not just the code review tool itself, but also its plugins ecosystem, hence you might want to include them as well into any collection and processing of analytics data.

Wanna try GDA? You are just one click away.

We made the GDA more accessible to everybody, so more people can play with it and understand its potentials. We create the Gerrit Analytics Wizard plugin so you can have some insights in your data with just one click.

What you can do

With the Gerrit Analytics Wizard you can get started quickly and with only one click you can get:

  • Initial setup with an Analytics playground with some defaults charts
  • Populate the Dashboard with data coming from one or more projects of your choice

The full GDA experience

When using the full GDA experience, you have the full control of your data:

  • Schedule recurring data imports. It is just meant to run a one-off import of the data
  • Create a production ready environment. It is meant to build a playground to explore the potentials of GDA

What components are needed?

To run the Gerrit Analytics Wizard you need:

You can find here more detailed information about the installation.

One click to crunch loads of data

Once you have Gerrit and the GDA Analytics and Wizard plugins installed, chose the top menu item Analytics Wizard > Configure Dashboard.

You land on the Analytics Wizard and can configure the following parameters:

  • Dashboard name (mandatory): name of the dashboard to create
  • Projects prefix (optional): prefix of the projects to import, i.e.: “gerrit” will match all the projects that are starting with the prefix “gerrit”. NOTE: The prefix does not support wildcards or regular expressions.
  • Date time-frame (optional): date and time interval of the data to import. If not specified the whole history will be imported without restrictions of date or time.
  • Username/Password (optional): credentials for Gerrit API, if basic auth is needed to access the project’s data.

Sample dashboard analytics wizard page:

wizard.pngOnce you are done with the configuration, press the “Create Dashboard” button and wait for the Dashboard, tailored to your data, to be created (beware this operation will take a while since it requires to download several Docker images and run an ETL job to collect and aggregate the data).

At the end of the data crunching you will be presented with a Dashboard with some initial Analytics graphs like the one below:

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You can now navigate among the different charts from different dimensions, through time, projects, people and Teams, uncovering the potentials of your data thanks to GDA!

What has just happened behind the scenes?

When you press the “Create Dashboard” button, loads of magic happens behind the scenes. Several Docker images will be downloaded to run an ElasticSearch and Kibana instance locally, to set up the Dashboard and run the ETL job to import the data. Here a sequence workflow to illustrate the chain of events is happening:

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Conclusion

Getting insights into your data is so important and has never been so simple. GDA is an OpenSource and SaaS (Software as a Service) solution designed, implemented and operated by GerritForge. GDA allows setting up the extraction flows and gives you the “out-of-the-box” solution for accelerating your company’s business right now.

Contact us if you need any help with setting up a Data Analytics pipeline or if you have any feedback about Gerrit DevOps Analytics.

Fabio Ponciroli – Gerrit Code Review Contributor – GerritForge Ltd.

Gerrit User Summit 2017, 2-3 Oct, London

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New and exciting features are coming for this year Gerrit User Summit, with the launch of Ver. 2.15, NoteDb, high-availability, multi-master and much more.

The Summit will take place for the very first time in Europe, London, the location chosen by the community after a public consultation, the 2nd and 3rd of October at CodeNode (Skills Matter).

There are still a few places available but hurry up and register now at https://gerritusersummit.eventbrite.com.

See below an overview of the topics that will be presented and discussed during the User Summit.

What’s new in Gerrit 2.14.x.

Gerrit v2.14 was released during the last Hackathon in April and has gone through three patch releases. David Pursehouse from CollabNet will give an overview of the new features introduced which would be highly beneficial for all of those who haven’t migrated yet.

Gerrit at Google: Multi-master, Mutli-tenant.

Google is the founder, main contributor and possibly the most advanced user of the Gerrit Code Review: learning from their experience is a unique opportunity to learn and being able to leverage and use the tool at its best.

Patrick Hiesel from Google will go through the insights of their Gerrit Code Review architecture and will provide some of their metrics of scale. In addition to that, he will present some findings from the recent switch of their load-balancing infrastructure and the associated pitfalls encountered.

Google is possibly the only one in the world using Gerrit in a multi-tenant setup, having a unique multi-master installation that serves a constellation of domains and projects, including huge and familiar ones like Android and Chromium.

Standing “on the shoulders of giants” like Google helps a lot in preventing scalability issues as the audience and adoption of Gerrit Code Review grows in large companies: being part of the audience in the talk is a unique opportunity to learn and ask questions directly to the maintainers of their infrastructure.

PolyGerrit: a new UX experience for Gerrit Code Review

Google has invested a lot in reinventing and reengineering the user interface of Gerrit Code Review, which remained mostly unchanged for almost a decade. A new team has been put together in their San Francisco offices with experienced UX developers that leveraged the new Polymer framework of web components.

The result is PolyGerrit, a modern web UX which provides an unprecedented browsing speed and flexible rendering across different devices, including mobile and tablets.

The PolyGerrit Team will be presenting the findings of their user-experience research and show some of the features and insights of the new UX.

Gerrit CI and keeping logs forever.

Gerrit Code Review itself is a large project, involving over 300 developers across the globe and using the most advanced DevOps practices. The CI/CD pipeline has been provided and managed by GerritForge on the https://gerrit-ci.gerritforge.com and Luca Milanesio from GerritForge will present the latest improvements in the pipeline plus an interesting way of collecting and reusing the logs.

Leveraging the logs for identifying the bottlenecks of the CI/CD pipeline is the way to drive improvement. GerritForge leveraged the expertise of his engineers to harvest and organize data and will give it back to the community as powerful dashboards.

Beyond Gerrit.

Gerrit is great. However, it is also quite an important part of a bigger ALM process. Jacek Centkowski from CollabNet will describe how multiple tools can be unified under a single TeamForge umbrella and what are the immediate benefits of it.

What’s coming in Gerrit 2.15

After only four months, we are already close to the v2.15 of Gerrit Code Review, which would be possibly the last one before the step to the v3.0.

Dave Borowitz from Google, principal maintainer of the Gerrit Code Review project, will go through the new features of v2.15 and possibly give a glimpse in what to expect from v3.0.

Mining Gerrit Data to Study Contentious Reviews and Community Evolution

Gerrit Code Review is much more than a tool, it is a way for people working together in companies that are large and mostly distributed across the globe.

Shane McIntosh from McGill University has been running a research lab on this topic. The Software REBELs—a research lab at McGill University—mine code review data to study topics like the impact that code review practices have on software release and design quality. Our more recent work mines code review data to study the reviewing process itself. In this talk, I will describe the results of two empirical studies of data that we collected from the Gerrit instances of the OpenStack project. The first study aims to understand the reviews where reviewers disagree about a patch. The second study follows how the concerns that reviewers raise evolve as the OpenStack community ages and individual reviews accrue experience.

Gerrit Analytics: dashboards, networks, KPI

Gerrit has always been lacking major code analytics features compared to other Git Server tools like GitBlit or GitLab. GerritForge Ltd is filling the gap and adds one important asset to the Gerrit Code Review platform: code review analytics.

We need to harvest and unify the logs and events coming from the different components of the CI/CD pipeline by putting at the center of it the people and teams that are building and discussing the code on Gerrit. The resulting data-lake of information can be later analyzed and correlated to calculate the cycle time of the entire pipeline.

Luca Milanesio from GerritForge will show the new analytics dashboards that are going to be published and provided back to the Team that is developing the Gerrit Code Review project as a precious contribution to the community.

How to extend Gerrit using Scripting Plugins

Gerrit Code Review has a robust set of API that can be used to extend its functionalities and provide a more integrated development workflow for the Teams.

Luca Milanesio from GerritForge will present how to use different scripting tools to extend the capabilities of Gerrit without the need of developing and building a plugin, using Jython, Groovy and Scala.

A new simpler but powerful Gerrit Jenkins plugin

Gerrit Code Review is an essential part of a larger CI/CD pipeline. Most of the times it is used in conjunction with Jenkins, the most popular OpenSource Continuous Integration and Delivery tool.

The integration between Gerrit and Jenkins (Gerrit Trigger Plugin) was developed back in 2010 at Sony and since then has been extended and adopted in thousands of Jenkins installations. However, Jenkins has evolved too and has now a brand new concept and definition of multi-branch pipeline which struggles to be seamlessly integrated with the current Gerrit Trigger Plugin.

Luca Milanesio from GerritForge will present a brand new plugin based on the new Jenkins branch discovery API which works seamlessly with Jenkins multi-branch pipelines and provides a simpler interface with Gerrit by leveraging the new WebHooks.

Diffy with enterprise grade

Since 2012 CollabNet has been working on improving Gerrit integration with TeamForge. Many features have been created to satisfy the needs of enterprise customers. Eryk Szymanski from CollabNet will present features like RBAC, history protection, Git style notifications, quality gates, pull request and code browser which have been implemented on top of vanilla Gerrit.

Q&A with the maintainers

Have you ever wondered why something is working in a certain way? Have you ever wanted to explain any complaint about some parts of Gerrit? Would you give your congratulation to the people that made this project? Would you like to make a feature request or propose new ideas?

This is the moment where you can speak directly face-to-face to the people that are building this project every single day, the Gerrit maintainers.


The event is free for everyone, thanks to the contribution of our sponsors, CollabNet Inc, GerritForge Ltd and Skills Matter Ltd.

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