1.
IBM Z
How to get started with
OPEN-SOURCE SOFTWARE

2.
CDMX - Boston
JAVIER PEREZ
Open Source Program Strategist, IBM Z
@jperezp_bos
javierperez.mozello.com
www.linkedin.com/in/javierperez
» 10+ years in open-source
» Solution Architect and Product
Management background
» Led open-source projects at
Appcelerator and Red Hat
» App Dev, Mobile, App Security, Cloud
Native, SaaS offerings
» Voting Member of IBM Open-Source
Technical Steering Committee
» Voting Member of Open Mainframe
Project Technical Advisory Committee

3.
Open-Source since 1955
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• SHARE: World’s first computer user group
• Founded in 1955 by users of the IBM 701
• Shared technical details, programs, and
documentation
• SHARE Program Library started collection and
distribution of software

4.
Brief History of Open-Source
• First all software was free software (1950s ~ 1960s)
• SHARE started sharing (1955)
• Unix OS and Programming Languages were free (1970s)
• CBT Tape organization created in (1975) cbttape.org
• Commercial Software and User Communities start (1980s)
• GNU General Public License (GPL) for free software (1989)

5.
Brief History of Open-Source
• Linus Torvalds publishes Linux Kernel under GPL (1991)
• New Mozilla Foundation and Netscape browser is open-sourced
(1998)
• Open-source model described in the "The Cathedral and the Bazaar”
by Eric Raymond (1997-1999)
• Linus Torvalds creates Git in 2005, GitHub founded in 2008
• Microsoft buys GitHub for $7.8B (2018), IBM buys Red-Hat for $34B
(2019)
• 2021 Open-source companies' valuation: MongoDB $25B, Elastic
$14B, Databricks $28B (private), Cloudera $5.3B

6.
What is Open-Source Software?
• Source code is publicly available
• Open to collaboration
• Source code available with a license that
permits users to freely run, study, modify and
redistribute
Photo by Markus Spiske from Pexels

7.
What’s in Open-Source
Software?
1. Code (and packaged form)
2. Open-Source License
3. README
4. Contribution Guidelines
5. Code of Conduct

8.
Roles in Open-Source Software
Maintainer
Administrator, publish code, website, social media
Committer
Becoming a Committer in projects like Cordova, Node.js,
Linux, and others is a highly regarded and respected role
Contributor
Opportunity to learn, join a community and meet people
Photo by Procreator UX Design Studio on Unsplash

9.
Group Name / DOC ID / Month XX, 2020 / © 2020 IBM Corporation
Open-Source Licenses
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• Open-Source Initiative (OSI) reviews and approves
open-source licenses
• Restrictive or Copyleft License
• Reuse and updates to code must remain open-source
Examples: GPL, LGPL, AGPL
• Permissive License
Code updates may remain proprietary
Full distribution of code permitted. Examples: Apache,
BSD, MIT
• Server Side Public License (SSPL)
• Hosted service not allow, not in OSI

10.
Open-Source Libraries and
Dependencies
• Popular Open-Source Libraries have many
contributors and are also reused by other OSS
• Depending on the Programming Language
Open-Source Libraries can have from a few to
1000’s of dependencies
• There are Direct Dependencies and Transitive
Dependencies

11.
• Contribute Upstream
• Company Sponsored or Individually
• Enhancements & innovations
• Testing, bug reports, suggest a feature
• Bug fixes
• Vulnerability fixes
• Port to new platform
• Graphic design & documentation
• Advocacy, give a talk, write a blog, marketing
• Modified code not contributed back becomes close code
Photo by Andres Haro on Unsplash
What to Contribute?

12.
V1.1
Open-source
Project
V1.2 V1.3
V1.0
Enterprise
Edition
V1.1
Download
Code changes
and fixes
Test
Contribute
upstream
Download
Upstream project
Downstream
Fewer changes
and fixes
Test
Contribute
upstream
Download
Fewer changes
and fixes
Downstream
Upstream project
Benefits of Upstreaming:
• Less code to maintain in house
• External reviews and feedback
• Your code stays in the latest versions of both open-source project and commercial product
• Demonstrates commitment to the project and can influence direction
Open-Source Best Practice: Upstream Code

13.
• To start free or at a low cost. Experiment & fail fast
• Access to latest innovation without ”lock-in”
• Faster pace of bugs and vulnerabilities fixes
• Many support sources via documentation, community
forums/portals, videos, blogs, etc.
• Easier to recruit full stack developers, more proficient
developers
Photo by Damir Kopezhanov on Unsplash
Why companies invest in Open-
Source?

14.
Survey: 3,400 Developer
Consider open-source
software better than
proprietary software
Developer Managers
say open-source
knowledge is a factor
for hiring decisions
Agree that contributions
impress potential employers
94 %
65 %
87 %
Photo by Michèle Eckert on Unsplash
Source: 2021 O'Reilly Media survey, commissioned by IBM

15.
15
Companies Contributing to Open-Source
Source: GitHub research Apr29 2021 https://solutionshub.epam.com/OSCI/
Companies with the Most Active Contributors
4428 4204
2865
1693
4558
9239
8509
4260 4218
8478
0
2500
5000
7500
10000
Microsoft Google Red Hat IBM IBM + Red
Hat
Active Total Contributors

16.
Technical Support
1. Commercial Product Technical Support
• Support contract or subscription that includes Tech Support
• Includes all commercialized open-source software (e.i. RHEL, Ansible, etc.) and open-
source used by the commercial product
2. Open-Source Software Community Support
• Community driven, discussion forums, documentation and sample code
• No commitments, support contracts or Service Level Agreements (SLAs)
• Members of the community can assist addressing bugs
• All contributions are upstreamed back to the open-source project
Commercial Open-Source Support
• IBM TSS Tech Support for selected open-source packages
• Other vendors offer tech support for open-source packages (OpenLogic, Quansight, etc.)

17.
The Though Questions
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• Why would I give away my effort, time, expertise?
• Cultural change, community, innovation,
collaboration, build something larger, ego,
and more
• “I would never use open-source software in my
production environment”
• Unless there’s no need for Linux or an open-
source programming language or library
• Most production environments use open-
source software
Image by Reimund Bertrams from Pixabay

18.
The Though Questions
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• What if the open-source project is abandoned?
• Most software is deprecated at some point,
do your research, adopt growing projects
and contribute
• “My support will be dependent on the goodwill of
open-source contributors”
• Open-source are the building blocks, not
complete enterprise applications. The open-
source movement is not a trend has decades
of growth
Photo by Ricardo Esquivel from Pexels

19.
Ecosystems
19

20.
210M+
Repositories
500K+
Open-Source Projects
56M+
Developers
Open-Source Projects

21.
1.6M +
889 packages per day
406K +
327 packages per day
308K +
101 packages per day
270K +
177 packages per day
257K +
171 packages per day
166K +
15 packages per day
Source: May 18, 2021 www.modulecounts.com
Millions of Open-Source Projects

22.
Open-Source Ecosystem for IBM Z & LinuxONE
Linux Distributions &
Virtualization
Networking & Monitoring
Cloud & Container Services Languages & Runtimes DevOps/Automation Big Data, Observability, Analytics
Databases & Storage
Middleware & others
ClefOS
www.ibm.com/community/z/open-source-software/
hub.docker.com
Memcached
More: https://bit.ly/3qJwwXK
SUSE
docker
Terraform
Chef
GitLab
Splunk
MongoDB
Couchbase
CoackroachDB
MySQL
RabbitMQ
AI tools & frameworks
Zabbix
Transform
Serving

23.
• Build or compile the package in the corresponding
programming language and Linux distribution
• If using little-endian memory allocation, it has to
support big-endian memory allocation
• Same considerations apply to dependencies, all
libraries
• Optimization to boost performance and security using
s390x features is not required but recommended
S390x Porting Considerations

24.
Sample Open-Source DevOps Workflow
All available for Linux on IBM Z and LinuxONE

25.
Collect Data
Organize
Data
Analyze Data
Machine
Learning
Deep
Learning
Deploy Data
Maintain
Model
Data Asset
eXchange
(DAX)
Apache
Spark
Model Asset
eXchange
(MAX)
AIF360
AIX360
ART
AIF360
AIX360
ART
KF Serving
Kubeflow
Kubeflow
Kubeflow
Apache Kafka
Sample AI Dev Lifecycle & Open-Source

26.
NumFOCUS projects: NumPy, Pandas, Jupyter, Scikit Learn, SciPy, and others
AI Open-Source included in IBM Products

27.
From Open-Source to Red Hat Offerings

28.
Growing Open-Source Ecosystem on z/OS
zECS
Artifactory-vault
binutils
Bison
Bzip2
cURL
Diffutils
Galasa
GCC
Glibc
Gzip
Libssh2
M4
Make
Mktemp
OpenSSL
Sed
Sudo
Unzip
Vim
zECS
Zip
Zlib
zML
zos-native
zTron
ZEBRA

29.
What not to Open-Source
• Keys and credentials
• Customer data
• Employee data
• Patented intellectual property
• Code owned by other companies or entities
(unless it is open-source with appropriate
license)
Photo by Jon Tyson on Unsplash

30.
Takeaways
• Open-source is here to stay, join us
• We want to grow our community of users and
contributors
• More open-source tooling, integrations and
plugins create stickiness in the products
• Open-source promotes improvement on
architecture and coding practices
Photo by Stephen Picilaidis on Unsplash

31.
Recommended Reads
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Andreessen Horowits: Open Source: From Community to Commercialization
Mozilla: A Frameworrk for Purposeful Open Source
The Linux Foundation: Starting and Open Source Program in your Company
Opensource.com: 6 motivations for consuming or publishing open source software
GitHub Yearly Report: The State of the Octoverse
IBM Course, Intro to Open-Source: cognitiveclass.ai/courses/introduction-to-open-source

32.
Final Thought

33.
Javier Perez | Open Source Strategist | IBM Z
@jperezp_bos
javierperez.mozello.com
www.linkedin.com/in/javierperez
Thank you!