Git strategies for DevOps

Git Strategies for DevOps
By Stakater

Introduction
Source versioning
● core activity in software development.
● Distributed source versioning systems e.g. git
○ agile and collaborative approach
● Enterprise-grade git cloud services
○ Github
○ Gitlab
○ Bitbucket, etc.

Versioning strategy
Semantic Versioning (SemVer)
● Solution for dependency versioning hell
● intuitive way to track and understand versioning
● Useful for external as well as internal dependencies
○ Microservices architecture
● Version syntax: X.Y.Z
○ X: major version number - backwards incompatible features
○ Y: minor version number - backwards compatible features
○ Z: patch number - backwards compatible bug fixes

Development workflow
Base branch
● Usually "master"
● Protected branch. No direct commits.
Development branch
● Branch for a feature or fix
● Create Pull Request once changes are ready

Github settings for branch protection

Pull Request
● Notifications
○ Slack, email, etc.
○ On creation, approval and merge.
● Checks for merging
○ Approval/code review by a peer or lead
○ Jenkins CI pipeline

Github Pull Request: pending checks and review

Github Pull Request: CI pipeline check passed

Github Pull Request: checks and review completed

PR merged -> Jenkins release pipeline is triggered
● release version bumped
○ tagged in git
○ updated within files e.g. helm chart yaml, package.json, version
file, etc.
● release pushed to Nexus

Version bump
Version number
● Maintained in .version file
● major/minor version number
bumped by developer in file
● patch number bumped in CD
pipeline
Project Version file

GitOps
Two separate repos
● Code repo
○ Code of project
○ Built to artifact and/or docker image and/or helm chart
● Config repo
○ Defines deployment configuration
○ Which docker image or helm chart to use
○ Number of replicas
○ Deployment namespace
○ etc.

Contact
Email: hello@stakater.com
Web: http://stakater.com
Opensource: https://github.com/stakater/

Git strategies for DevOps

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