Git based application deployment patterns for Kubernetes

Shahidh talks about various patterns revolving around GitOps (Git + Devops) for applications deployment onto Kubernetes.

Transcript

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