Daniel Cosme
31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
# GitOps
|
|
> A set of "best practices" where the entire code delivery process is controlled via Git,
|
|
including infrastructure and application definition as code and automation to complete updates
|
|
and rollbacks.
|
|
|
|
The key GitOps Principles
|
|
- The entire system (infrastructure and applications) is described declaratively.
|
|
- The canonical desired system state is versioned in Git.
|
|
- Changes approved are automated and applied to the system.
|
|
- Software agents ensure correctness and alert on divergence.
|
|
|
|
https://opengitops.dev/
|
|
|
|
Key points for a Kubernetes cluster:
|
|
1. The state of the cluster is always described in Git. Git holds everything for the application
|
|
and not just the source code.
|
|
2. There is no external deployment system with full access to the cluster. The cluster itself
|
|
is pulling changes and deployment information.
|
|
3. The GitOps controller is running in a constant loop and always matches the Git state with the
|
|
cluster state (reconciliation loop).
|
|
|
|
## flux vs ArgoCD
|
|
Flux is more CLI Driven
|
|
ArgoCD has a richer GUI
|
|
|
|
## Flux
|
|
Prerequisites:
|
|
- Kubernetes Cluster
|
|
- Github (giea, etc) personal access token
|
|
|