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DevOps: How to Be an Ansible Contributor Step – by – Step
Developer Advocate, Cisco DevNet – developer.cisco.com
@johnamcdonough
John McDonough
John McDonough Developer Advocate, Cisco
John Works for Cisco DevNet
John Writes Code
John Talks about Code
John Talks about Writing Code
John Writes OK Code and Talks Pretty Good Well
John Contributes to Ansible
How to be an Ansible Contributor
• What Do I Know About Ansible? • Read Some Docs • Fork Ansible on Github • Setup Your Development Environment • Read Some Docs… again • Create an Ansible Module • Read Some Docs… again • Read Some Docs… again and again! • Submit a Pull Request • Read Some Docs… again • Sync Your Fork • Delete Your Branch
What Do I Know About Ansible?
What Do I know About Ansible?
• Not that Much … but it's Enough!
• I know how to
– Install Ansible
– Create/Run Ansible playbooks
– Run Ansible in very very very verbose mode
– Write Python Code (can be other languages, python is best)
– Use github.com and git
– Google Stuff
Read Some Docs
Read Some Docs
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Read Some Docs
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Someone wrote these Docs for you! Don't make them Ugly Cry!
Read Some Docs
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Someone wrote these Docs for you! Don't make them Ugly Cry!
Fork Ansible on Github
Fork Ansible (docs say clone – I say fork)
• Forking a Github repository is – Making a copy of that repository on github under YOUR account – At that point in time – Connected to the original but not updated by the original
• https://github.com/ansible/ansible
– Fork is not a git command and is done in the github.com interface • hub – git from the command line - https://hub.github.com/ • hub is an extension to command-line git do everyday GitHub tasks without ever leaving the
terminal.
Fork Ansible (docs say clone – I say fork)
• Forking a Github repository is – Making a copy of that repository on github under YOUR account – At that point in time – Connected to the original but not updated by the original
• https://github.com/ansible/ansible
– Fork is not a git command and is done in the github.com interface • hub – git from the command line - https://hub.github.com/ • hub is an extension to command-line git do everyday GitHub tasks without ever leaving the
terminal.
Your Fork Their Code
Setup Your Development Environment
Setup Your Development Environment
• Clone YOUR Forked Code NOT the Ansible Code! • Setup a Python Virtual Environment in the ansible
Directory – cd ansible
– python3 -m venv venv
• Activate the Virtual Environment – . venv/bin/activate
• Install the Development Requirements – pip install -r requirements.txt
• Run the Development Environment Setup Script – . hacking/env-setup
Setup Your Development Environment
Setup Your Development Environment
Setup Your Development Environment
Setup Your Development Environment
Setup Your Development Environment
Read Some Docs … again
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Read Some Docs … again
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Create an Ansible Module
Create an Ansible Module
• Modules should be concise – "Do One Thing Well"
• Modules should not require a user to know all the underlying options
• Modules should encompass much of the logic for interacting with a resource
• Think CRUD (Create / Read / Update / Delete)
Create an Ansible Module
• 'cd' to the desired directory
• Create a new file
• Use the "New module development" Template
• Test the Module – Locally
– Playbook
• Run Sanity Tests
• Create Unit Tests
Read Some Docs … again
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Read Some Docs … again and again
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Read Some Docs … again and again
http://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html
Submit a Pull Request
Create an Ansible Module – Revised
• 'cd' to the desired directory • Create feature branch • Create a new file • Use the "New module development" Template • Test the Module
– Locally – Playbook
• Run Sanity Tests • Create Unit Tests • Commit and Push YOUR Code to YOUR feature branch
Submit a Pull Request
• Pull Requests can only be submitted against one module
• One feature branch per Pull Request – git checkout -b <feature branch name> Create
– git branch List branches
Read Some Docs … again
http://docs.ansible.com/ansible/devel/dev_guide/testing/sanity/index.html
Submit a Pull Request
Submit a Pull Request
Submit a Pull Request – After the Click
• Automated testing happens
• Your code will probably fail – Fix it – Commit it – Push it
• Automated Testing Happens – You do not need to submit a new Pull Request
Submit a Pull Request – Reviewers
• When your code is "Good" it will be merged… maybe. • There are reviewers and maintainers that need to approve your code
– They will recommend changes – They will hurt your feelings – They will break you! – They will help you be better!
• Make the changes that are requested – Commit it – Push it
• Automated Testing Happens – You do not need to submit a new Pull Request
Submit a Pull Request
• Your Code Passes Tests
• Your Code is marked shipit
• Your Code is Merged
• Wait you're not done yet!
Sync Your Fork
Sync Your Fork git remote add upstream https://github.com/ansible/ansible.git
git remote –v what are your remotes
Only need to add the upstream once
git fetch upstream fetch the current ansible/devel
git checkout devel checkout YOUR devel
git merge upstream/devel merge ansible/devel to YOUR devel
git push origin devel push YOUR devel to YOUR Ansible fork
https://help.github.com/articles/syncing-a-fork/
Delete Your Branch
• git branch -d branch1 <--- locally
• git push origin :branch1 <--- remote
• Do it all over again for your next module
Links
• Blog - http://cs.co/sxsw2019 – “How to Contribute” video: https://www.youtube.com/watch?v=VAbnJcyIMYA&feature=youtu.be
• Matt Davis
– Ansible Module Development video - https://github.com/nitzmahone/ansible-modules-101 – Ansible Module Development 101 github - https://www.ansible.com/ansible-module-development-101
• Ansible Links:
– Ansible on Github - https://github.com/ansible/ansible – Ansible module development: getting started -
https://docs.ansible.com/ansible/devel/dev_guide/developing_modules_general.html – Testing Ansible - https://docs.ansible.com/ansible/devel/dev_guide/testing.html
• Learning – DevNet Learning Labs an introduction - https://developer.cisco.com/learning/modules/sdx-ansible-intro – DevNet Learning Labs a bunch of labs - https://developer.cisco.com/learning/modules?keywords=ansible
Got Questions? This is where I'm at!
[email protected] @johnamcdonough http://github.com/movinalot @CiscoDevNet facebook.com/ciscodevnet http://github.com/CiscoDevNet
Thank you!
