Flux is incubating + the road ahead

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Flux is Incubating 🎉
The Road Ahead
Stefan Prodan, Flux Maintainer, Flagger Creator, DX Engineer at Weaveworks
Leigh Capili, Flux Contributor, DX at Weaveworks

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Introductions
Stefan is a Developer Experience Engineer at
Weaveworks and an open source contributor
to cloud-native projects like Flux, Flagger,
Service Mesh Interface, and others. He
worked as a software architect and a
DevOps consultant, helping companies
embrace DevOps and the SRE movement.
Stefan has over 15 years of experience with
software development and he enjoys
programming in Go and writing about
distributed systems.
Leigh is a Kubernetes Contributor and
Developer Experience Engineer at
Weaveworks. ☸
He authored kubeadm's etcd mTLS
implementation and is currently working on
cluster-addons and multi-tenancy in Flux.
He also maintains ignite, a docker-like
experience for using Firecracker MicroVM’s.
Leigh really likes helping people.
Stefan Prodan Leigh Capili

3. Flux is awesome!
Leigh Capili, Developer Experience Engineer, Weaveworks

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Flux CD - Production Users benefiting from GitOps
Azure Arc

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The Flux community was the first to clearly define GitOps practices:
1. Describe your system declaratively
2. Keep configuration under source control
3. Use software agents to reconcile and ensure correctness and alert for drift
Why GitOps?
Some Benefits:
Collaboration on infra (devs ♥ git)
Access Control
Auditable History
Drift Correction
~ clear boundaries between dev-teams and k8s ~

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The Flux project aims to provide a complete Continuous Delivery platform on top of
Kubernetes, supporting all the common practices and tooling in the field, e.g.
Kustomize, Helm, metrics with Prometheus and so on.
Why is Flux great for GitOps?

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Flux v1 → Flux v2 progress
Flux v1 -- Monolith
sync a single git repo to a local cluster, and automate updates to YAML in Git
Flux v2 -- Kubernetes-native micro-services, rewritten from scratch
syncs multiple git repositories to local or remote clusters + much more
Multiple new project repos because Flux v2 has several controllers:
● fluxcd / flux2
● fluxcd / source-controller
● fluxcd / kustomize-controller
● fluxcd / helm-controller
● … and more
● Flagger also now in the fluxcd org

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Awesome Flux v2 Features
declarative Helm
health-checks
dependent ordering
bootstrap
Git & Helm tagging / semver
image-tag updates
multi-repo composition
multi-tenancy
remote-cluster mgmt
observability
(kstatus / prometheus)
notifications
extensible
Flux gives you flexible tools to implement GitOps for your team’s specific needs

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The Community Knows Flux Awesomeness
🛠
40k+
Contributions
(26k+ since Sandbox)
🥰
1888
Contributors
(1569 since Sandbox)
🤹
14 Maintainers
In 5 companies
(6 Maintainers, 3 companies at Sandbox time)
🌟
12k+
GitHub Stars
(+8k since Sandbox)
🎯
16k+
Commits
(11k+ since Sandbox)
💖
Lots of love
for our community….

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Resources to Get Started
START HERE: fluxcd.io:
● New users: use Getting Started Guides
● Flux v1 users: use Migration Guides (see next slide)
The Power of GitOps with Flux v2 (& the GitOps Toolkit) Playlist
https://youtube.com/playlist?list=PL9lTuCFNLaD3fI_g-NXWVxopnJ0adn65d
The NEXT TALK (EVERY OTHER MONDAY): https://www.meetup.com/GitOps-Community/events/

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See GitHub Discussion on Flux v1 → Flux v2 Migration:
https://github.com/fluxcd/flux2/discussions/413
Or go to fluxcd.io →
https://toolkit.fluxcd.io/guides/flux-v1-migration/
Migrating from Flux v1 → Flux v2

13. Flux technical deep dive
Stefan Prodan, Flux maintainer, Weaveworks

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Cluster Operators who automate provision and configuration of clusters
Platform Engineers who build continuous delivery for developer teams
App Developers who rely on continuous delivery to get their code live
Who is Flux for?

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Cluster Operators - bootstrap & maintenance
Cluster Definition Cluster Addons Tenants Clusters
develop configure on-board maintain
Infrastructure Git Repository Environments
CD

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Flux bootstrap - CLI & Terraform Provider
One-click provisioning for:
● Git repositories
● Deploy keys
● Teams access
● Flux controllers
Git providers:
● GitHub
● GitLab
● BitBucket (TBA)
● SSH-agent (TBA)

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Flux - Multi-cluster bootstrap

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Flux - Cluster management
Features:
● Dependency management for infrastructure and apps
● Secrets management (Mozilla SOPS, Cloud KMS)
● Authenticity validation (GPG commit signing verification)
● Validates manifests against Kubernetes API
● Impersonates Kubernetes accounts (multi-tenancy RBAC)
● Health assessment of the deployed workloads
● Integrates with Kubernetes Cluster API
● Incident management (suspend/resume reconciliation)
● Reports cluster state changes
● Trigger cluster reconciliation via webhooks

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Flux - Observability
Features:
● Reconciliation status exposed via
“kubectl get/describe”
● Health checks for workloads
and custom resources
● Kubernetes events
● Prometheus metrics and alerts
● Grafana dashboards
● Slack/MS Teams/Discord notifications
● Commit-status updates for
GitHub, GitLab, BitBucket, Azure DevOps

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GitOps Toolkit - Flux SDK
The GitOps Toolkit is a set of composable
APIs and specialized tools that can be used
to build a Continuous Delivery platform on
top of Kubernetes.
The toolkit is for platform engineers who
want to make their own continuous delivery
system, and have requirements not covered
by Flux.

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GitOps Toolkit - Source Controller

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GitOps Toolkit - Specialized Reconcilers
The GitOps Toolkit allows specialized reconcilers to collaborate when declaring
the desired state of a group of clusters:
● Kustomize Controller
● Helm Controller
● Image Reflector Controller
● Image Automation Controller
To write your own controller see the source-watcher guide.

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App Developers - manual delivery
Source Code Container Images Deploy Manifests Clusters
build push update apply

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App Developers - automated delivery
Source Code Container Images Deploy Manifests Clusters
build push update apply
Git Repo Image Repo Git Repo Environments
CI CD

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Flux - Automate image updates to Git

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Flux v2 - Powered by GitOps Toolkit

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Do you have questions?
Join the Flux discussions on GitHub
https://github.com/fluxcd/flux2/discussions

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Thank you very much!