kubecon24/content/day4/03_operator.md

title	weight	tags
What's New in Operator Framework?	3	platform operator scaling

By the nice operator framework guys at IBM and Red Hat. I'll skip the baseline introduction of what an operator is.

Operator DSK

Build the operator

• Kubebuilder with v4 Plugins -> Supports the latest Kubernetes
• Java Operator SDK is not a part of Operator SDK, and they released 5.0.0
  • Now with server side apply in the background
  • Better status updates and finalizer handling
  • Dependent resource handling (alongside optional dependent resources)

Operator Lifecycle Manager

Manage the operator -> A operator for installing operators

OLM v1 APIs

• New API Set -> The old CRDs were overwhelming
• More GitOps friendly with per-tenant support
• Prescribes update paths (maybe upgrade)
• Support for operator bundles as k8s manifests/helm chart

OLM v1 Components

• Cluster Extension (User-Facing API)
  • Defines the app you want to install
  • Resolves requirements through CatalogD/depply
• CatalogD (Catalog Server/Operator)
• Depply (Dependency/Constraint solver)
• Applier (Rukoak/kapp compatible)

flowchart TD
    uapi(User facing api)-->|Can I find this operator|catalaogd
    catalogd-->|Check if all dependencies are checked|depply
    depply-->|Please install|kapp

flowchart LR
    oa(operator author)-->ba(Bundle and att to catalog)
    ba-->catalogd(Catalogd Handle unpackling)

    user-->ufa(User facing api)
    ufa-->|Resolve package|catalogd
    ufa-->|Create app on cluster|appcr(App CR / kapps)