Nowadays DevOps Engineers love different things about Infrastructure as Code. Be declarative when building and automating infrastructure, and perform the deployment through a GitOps deployment. What is GitOps? It is a way of managing the infrastructure and application so that the system is described declaratively and version controlled. It has an automated process that ensures that the deployed environment matches the state specified in a repository. Is it cool, am I right?! But, what about Kubernetes? Yes, we have the excellent YAML files, but wouldn't it be awesome to declare the state into a Git repository and wait for the cluster to automatically update itself instead of manually doing it? Here is the newly graduated CNCF project Flux! It allows you to declare, and automate your Kubernetes cluster by simply pushing code to a Git repository and letting K8s do the rest of the tedious work.

1. HOW TO GITOPS YOUR
CLUSTER WITH FLUX
DAVIDE IMOLA

2. Davide Imola
DevOps Engineer at
RedCarbon
davideimola.com · @DavideImola · schrodinger-hat.it

3. What is GitOps?
Is a way of managing your
infrastructure and applications so that
the whole system is described
declaratively and version-controlled,
and having an automated process of
deployment.

5. •
•
•
What are the benefits?
managing the infra and app
lifecycle within a single tool
faster deployments
helps the DevOps adoption of an
organization

7. What is the difference between
DevOps and GitOps?
GitOps relies on automation and tool
to manage and deploy code changes.
DevOps focuses more in collaboration
and communication between teams.

8. COOL! WHAT ABOUT
IN KUBERNETES?

9. Say hello to Flux…

11. Flux is a CNCF Graduated Project that
allows you to easily GitOps your
Kubernetes cluster.

12. HACKING TIME

14. WHAT OTHER
THINGS CAN I DO?

15. Image Update Automation
It is possible to configure Flux to
automatically update the application
image by watching the images
pushed on a specific registry.

16. • scan the container
registry and fetch the
image tags
• select the latest tag
based on the defined
policy (semver, calver,
regex)
• replace the tag in
Kubernetes manifests
(YAML format)
• checkout a branch,
commit and push the
changes to the remote
Git repository
• apply the changes in-
cluster and rollout the
container image

18. With Flux it is possible to simply
manage applications made both with
Kustomize and Helm, directly out of
the box!

19. With Flagger it is possible to
automate the release process for
applications. It implements several
deployment strategies (Canary
releases, A/B testing, Blue/Green
deployment).

20. Flux integrates a notification system
too in order to notify the team on the
status of the reconciliation.

22. See you all at Open
Source Day 2023
24th March 2023 · osday.dev

23. My contacts
@DavideImola
davideimola.com
schrodinger-hat.it