DevOps, Agile and Open Source at ImmobilienScout24

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How Open Source, Agile Methods and DevOps come together at ImmobilienScout24. Was verbindet Open Source, Agiles Mindset und DevOps? In der richtigen Kombination dieser Themen entsteht für die IT eine neue Basis der Zusammenarbeit. Ein Rückblick auf die letzten 6 Jahre bei ImmobilienScout24 zeigt, wie die Anwendung in der Praxis unsere IT-Abteilung voran gebracht hat. Bei der Cloudmigration profitieren wir insbesondere von der offenen Kultur in der Firma und der Community.

Tecnologia

www.immobilienscout24.de
OpenTechSummit 2015 | 12.05.2015 | Schlomo Schapiro
Systems Architect & Open Source Evangelist
http://creativecommons.org/licenses/by-nd/4.0
Open Source
Agile
DevOps
@schlomoschapiro

www.ImmobilienScout24.de
◉ >2 billion PI per month
◉ 2 data center with ~1900 VM
◉ ~2.5 million outgoing email/day
◉ total of ~550 employees
◉ ~30 crossfunctional IT teams
◉ ~150 in IT
◉ 16 years in business

Linux
Java
Tomcat
PHP
MongoDB
MySQL
Elastic Search
Python
Bash Perl
Oracle
Windows
Micro Strategy
VMware
Adobe
Graphite
Logstash Spring MVC
jQuery
Hibernate
Kibana
YADT
Lab Manager Light
Maven
RPM
Subversion
Tibco
Jira
Confluence
IntelliJ Idea
Icinga
F5

Open Source:
Foundation of our IT Business
Use Open Source Software...
https://github.com/ImmobilienScout24
https://yadt-project.org
The Cloud Challange

Publish own software as Open Source
http://goo.gl/l9zFbv
Strategic sponsoring of Open Source
projects to solve internal problems
http://goo.gl/PY2xdh

Manifesto for Agile Software Development
http://agilemanifesto.org
Individuals and interactions
over processes and tools
Working software
over comprehensive documentation
Customer collaboration
over contract negotiation
Responding to change
over following a plan

birgitta hohenester / pixelio.de
Steve Jurvetson / flickr

DEV OPSPROD
Product Delivery Pipeline
Agile DevOps

Software Development:
Going Agile with SCRUM
1st
DevOps project:
New RPM-based deployment toolchain
Platform migration to RPM-based
deployment done by Ops & Dev teams
Dev thinking in Ops:
Test Driven Infrastructure
Cloud Migration:
You Build It - You Run It

DevOps is Agile that
actually works for
all
IT departments

OpenSource
DevOps
Agile
Collaboration
Contribution
Trust
Transparency
Let’s do it!
Exchange
Cross-
functional
Backlogs

It is all about people,
not about technology.
http://go.schapiro.org/slides
http://www.schapiro.org/schlomo/publications

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I will show why GitOps is a major waypoint in the journey from old-style Dev vs. Ops data center operations towards a truly automated hands-off operations future. GitOps is the technological core required for compliance automation, large-scale operations, and lowering the cost of compliance & governance as well as lowering the cost of internal tooling. GitOps will give us a future, where we all take a step back, watch the bots do the admin job, and where we Dev, Ops, everybody work on improving the bots and invent new automation solutions. Schlomo Schapiro is an Agile IT and Open Source enthusiast dedicated to advancing an agile mindset and a DevOps-orientated culture in IT. He works as Principal Engineer at Forto in Berlin, is author of several Open Source projects, conference speaker and regularly publishes blog and magazine articles. See https://schlomo.schapiro.org/2021/04/the-gitops-journey.html for more details.

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See https://www.youtube.com/watch?v=_uDzXmbiUIg for German-language talk to these slides. What is the role of GitOps in IT strategy? This talk gives an overview and puts GitOps into the context of current challenges in IT strategy. Main aspects are continuous delivery, policy as code, automated governance, compliant-by-default work environments, acceptable means of compliance and a comprehensive automation of all development and operations related processes with the goal of true hands-off operations. The result places GitOps as a major building block of any modern IT strategy. GitOps helps building essential key IT capabilities. It creates the motivation to truly “fix the basics” via sustainable solutions to enable creating higher level automation solutions. With GitOps engineers can focus much more on business value and spend less effort on boring IT topics.

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Want Digitalisation, have Cloud - DevSecOps Days 2021 - Schlomo Schapiro

Schlomo Schapiro

Video: https://youtu.be/U4cHbXYy1FQ How to combine traditional IT governance with continuous delivery? Not At All! A highly automated continuous deployment environment creates a whole new world of challenges for companies to meet their compliance and governance requirements. Traditional - manual - processes don’t manage to keep up with quick and frequent releases. The solution to this conflict of interests is the automation of all compliance checks and the automated certification of every software delivery into production. Sounds obvious and simple, but it is difficult to implement. The talk shows how we tackle this topic at DB Systel and how we create solutions for automated compliance certification. See https://bit.ly/5pdops for more materials and the 5 DevOps Principles

Automated Governance - Continous Lifecycle 2019 - Schlomo Schapiro

Schlomo Schapiro

Wie passt klassische IT Governance zu Continuous Delivery? Gar nicht! Eine hochgradig automatisierte Continuous Deployment Welt stellt die Firma vor ganz neue Herausforderungen im Bereich Compliance und Governance. Klassische - manuelle - Prozesse kommen den schnellen und häufigen Releases gar nicht mehr hinterher. Die Lösung ist die Automation aller Governance prüfungen und die automatisierte Zertifizierung jeder Softwarelieferung. Das klingt banal und einfach, ist im Detail jedoch nicht einfach umzusetzen. Der Vortrag zeigt am konkreten Beispiel der DB Systel, wie wir das Thema angehen und Lösungen für die automatisierte Zertifizierung geschaffen haben.

Compliant by Default - Digitaler Wandel - 14.08.2019 - Schlomo Schapiro

Schlomo Schapiro

Video: https://vimeo.com/348556177 DevOps ist normal – oder etwa doch nicht? Wer kann das schon für seine Firma guten Gewissens sagen? Während sich die übliche DevOps-Diskussion um das Wie dreht, adressiert Schlomo die Frage, wann DevOps normal geworden ist und was dafür passieren muss, damit alle dieser Meinung sind. Von einer neuen DevOps-Definition ausgehend stellt der Vortrag eine einfache Argumentationskette für DevOps vor, in der die DevOps-Transformation mit Fahren lernen verglichen wird. So wie es heutzutage normal ist, dass die meisten Erwachsenen einen Führerschein haben, so normal sollte DevOps in jeder IT sein. Diese Analogie lässt sich auch in einem Aufzugsgespräch verwenden, um das Management von der Normalität des DevOps-Ansatzes zu überzeugen. Mit der DevOps-Definition gelingt es den Teilnehmern, jede DevOps-Diskussion zu gewinnen und damit DevOps zur neuen Normalität zu machen. Am konkreten Beispiel der DB Systel zeigt der Vortrag, wie mit dem Thema DevOps-Teams konstruktiv umgegangen werden kann. Siehe https://bit.ly/5pdops für weiteres Material und die 5 DevOps Prinzipien

DevOps ist normal - DevOps Essentials 2019 - Schlomo Schapiro

Schlomo Schapiro

How to convince your company that DevOps is a transitional mode of operations and the means to a goal instead of goal in itself. What comes after DevOps is “done”? DevOps is like learning to drive and a “DevOps Team” is like a motor cycle driving school. You learn in theory and practice to survive amongst “live traffic”, where other road participants are not very considerate. You have to comply with a lot of regulations. From early on you drive your motor cycle alone and the driving instructor follows you in his car keeping a safe distance. He talks with you via radio and tells you where to pay attention and how to drive. But you drive all alone and by yourself - amongst live traffic. If you hit a tree and die, it is your own fault. If you cause a crash, it is your own fault. Same about learning DevOps. You are responsible for your product in production with “live traffic” and real customers. If you crash your server, it your own fault. If your code quality causes harm to the company, it is your own fault. Your DevOps Coach sits next to you and talks to you while you type away at your screen, like a driving instructor. In the end you prove your driving skills, get your license and ride happily singing full speed into the sunset. Same about DevOps, after a training period you work alone. You build it - you run it. You go full speed ahead and deliver value over value. Who has a bumper sticker claiming “I have a driving license”? That’s why “DevOps Team” is a passing thing and once you qualify you are just an Engineering Team who are fully responsible for their product end to end. No need to put a claim to what is normal, because DevOps is normal. Video: https://youtu.be/N2EWEfhQt2M

The Devops Driving School - DevOps Gathering 2019 - Schlomo Schapiro

Schlomo Schapiro

Open Source Contribution Policy at DB Systel - Schlomo Schapiro - AK Open Sou...

Schlomo Schapiro

Learn about the journey of Deutsche Bahn towards Cloud computing, DevOps and agile transformation, with special focus on our Continuous Delivery strategy and implementation. After a brief overview of what is happening at DB Systel, we will show our Continuous Delivery as-a-Service (CDaaS) approach. CDaaS is an integrative approach to Continuous Delivery ensuring governance and security compliance whilst being fully focused on the user experience. We will show the extensibility and simplicity of CDaaS and how it helps DevOps teams improve code quality. Key take aways are a profound understanding of the intimate relationship between DevOps, Continuous Delivery and Cloud which enables a truly integrated work environment for our developers. By putting ?Developer Productivity? first we ensure that our teams can focus on developing their features over choosing the right tool or knowing all platform topics in-depth

Compliant by Default - Continuous Delivery at DB Systel - 16.10.2018 - Schlom...

Schlomo Schapiro

More than just buzzwords, true agility depends on the successful combination of DevOps, Continuous Delivery and Cloud platforms. Learn which technology choices have the greatest impact on the company culture. Take DevOps adoption to the next level by introducing DevOps key performance indicators as a measure of your company’s progress. This session presents current developments and projects at DB Systel, the IT company of Deutsche Bahn.

DevOps + Continuous Delivery + Cloud: The Three Drivers of Enterprise Agility...

Schlomo Schapiro

Kubernetes: Shifting the mindset from servers to containers With Kubernetes pods and containers several fundamental assumptions of server operations don't apply any more. Some Linux services like SSH even disappear and are provided by Kubernetes instead. This talk explores the mindset shift that developers and admins of Linux servers have to do in order to fully take advantage of the power of a Kubernetes cluster: * Servers turn into pods * Linux application services turn into containers * Standard services like cron and SSH disappear completely * How to separate between initialization, run and maintenance phases * Building pods with multiple containers that work together Following practical examples from real migration projects participants gain a new understanding of the role of services, init scripts, cron jobs and other standard Linux components. Key takeaways are a better understanding of how to model a complex system on top of Kubernetes and practical tips for migrating servers into Kubernetes containers. Successfully adopting Kubernetes requires a big change in how developers and admins think about servers - bigger than any change before. Bigger than the change brought by VMs. This talk shows why it pays to change traditional concepts and to embrace the new world of Linux services modularization that Kubernetes stands for. See Using Kubernetes with Multiple Containers for Initialization and Maintenance (http://blog.schlomo.schapiro.org/2017/06/using-kubernetes-with-multiple.html) for more information and a demo.

Kubernetes - Shifting the mindset from servers to containers - microxchg 201...

Schlomo Schapiro

Root for All - Measuring DevOps Adoption DevOps is about culture and mindset more than about technology - but how do you measure success? How do you know if your company really "does" DevOps? It turns out that root access to production servers is not only the proverbial holy grail but actually serves as a fact-based measure for the trust and automation levels in an organization. This talk explores the connection between root access and automation on one hand and DevOps mindsets, cross functional teams and shared responsibility on the other hand. Based on practical experiences, the talk provides concrete suggestions for achieving true DevOps happiness. As a result you will know why in the end there is no harm at all in granting root access to everybody. Key takeaways are solid arguments that you can use to convince your boss and your peers to take a different approach on root access demonstrating how shared responsibility works for real. See Root for All - A DevOps Measure? (http://blog.schlomo.schapiro.org/2017/06/root-for-all-devops-measure.html) for more background information.

Root for all - measuring DevOps adoption - microxchg 2018 - Schlomo Schapiro

Schlomo Schapiro

How many log levels do you know? How many log levels are actually useful? What is the practical difference between WARNING and NOTICE? I believe that in a world of automation, I need only two log levels: ERROR and everthing else. ERROR means that I as a human should take action. Everything else is irrelevant for me. All the other log levels are IMHO a remnant of the past from the last century. This ignite talk looks at the WARNING problem from both a Dev and an Ops perspective in order to find a useful definition for the age of automation. See http://blog.schlomo.schapiro.org/2015/04/warning-is-waste-of-my-time.html for blog article with more info.

WARNING is a waste of my time

Schlomo Schapiro

EuroPython 2014 YAML Reader Lightning Talk

Schlomo Schapiro

Common wisdom has it that the test effort should be related to the risk of a change. However, the reality is different: Developers build elaborate automated test chains to test every single commit of their application. Admins regularly “test” changes on the live platform in production. But which change carries a higher risk of taking the live platform down? What about the software that runs at the “lower levels” of your platform, e.g. systems automation, provisioning, proxy configuration, mail server configuration, database systems etc. An outage of any of those systems can have a financial impact that is as severe as a bug in the “main” software! One of the biggest learnings that any Ops person can learn from a Dev person is Test Driven Development. Easy to say - difficult to apply is my personal experience with the TDD challenge. This talk throws some light on recent developments at ImmobilienScout24 that help us to develop the core of our infrastructure services with a test driven approach: - How to do unit tests, integration tests and systems tests for infrastructure services? - How to automatically verify Proxy, DNS, Postfix configurations before deploying them on live servers? - How to test “dangerous” services like our PXE boot environment or the automated SAN mounting scripts? - How to add a little bit of test coverage to everything we do. - Test Driven: First write a failing test and then the code that fixes it. The tools that we use are Bash, Python, Unit Test frameworks and Teamcity for build and test automation. See http://blog.schlomo.schapiro.org/2013/12/test-driven-infrastructure.html for more about this topic.

OSDC 2014 Test Driven Infrastructure

Schlomo Schapiro

PyCon 2013 - Distributed Monitoring Configuration

Schlomo Schapiro

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