Shahidh talks about various patterns revolving around GitOps (Git + Devops) for applications deployment onto Kubernetes and introduces Gitkube (https://github.com/hasura/gitkube) as a tool to do GitOps.

1. Git based application
deployment patterns for
Kubernetes
Git ❤ K8s

2. Shahidh K
Muhammed
@shahidh_k

3. Git
● Distributed version control system
● Manage source code
● Any text files can be tracked
● Collaboration

4. Git - Source of Truth
● Infrastructure as Code
○ Terraform, CloudFormation
● System Configuration as Code
○ Ansible
○ Chef
○ Puppet
● Application Configuration as Code
○ Kubernetes
○ Hasura
● Application Source Code

5. Declarative tools ❤ Git

6. Ops
● Configure, build, test, deploy
● CI/CD
● Monitor, fix
● Upgrades
● Rollbacks
● Automation

7. GitOps
● Ops practices using Git
● Use Git as source of truth
● Drive operations through git repo
● Get version control, history, peer review, and rollback
● Continuous delivery - Automated pipelines
● Webhooks: push to trigger build/test
● PRs & merge branch to deploy

8. GitOps - Patterns
● CI builds artifacts
● Updates config (in a git repo)
● Trigger rollout (PR merge/commit)
● Observe
● Control

9. GitOps - Patterns
Source: Weave Works

10. GitOps - Patterns
● Use declarative configuration to define
application and services
● All changes go through git review process,
none using kubectl
● Use an operator in the cluster to drive
observed state to desired state, as declared
by the configuration in git
● pre-push hook to create manifests
○ Render templates for correct env
○ Secrets
● pre-receive hook or webhooks to build
artifacts and do kubectl set-image
● Power to developer
● Own tooling

11. Gitkube

12. Gitkube - Architecture

13. Demo
● Gitkube
● GitOps at Hasura:
○ Deploying applications
○ Changing subdomain
○ Add a new domain
○ Database migrations

14. Shahidh K
Muhammed
@shahidh_k
Thanks for listening! Questions?
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