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Releases

Current release status for Butler Labs open source projects.

Butler Platform​

ComponentLatestTypeReleased
butler-api
CRD type definitions (the API contract)
0.9.2moduleMar 26, 2026
butler-controller
Core reconciliation controllers
0.14.0containerApr 4, 2026
butler-server
HTTP/WS API server
0.4.6containerMar 31, 2026
butler-console
Web console
0.4.5containerMar 31, 2026
butler-cli
CLI tools (butlerctl, butleradm)
0.6.0binaryMar 23, 2026
butler-bootstrap
Management cluster bootstrap controller
0.4.1containerMar 26, 2026
butler-provider-harvester
Harvester HCI provider controller
0.2.2containerMar 26, 2026
butler-provider-nutanix
Nutanix AHV provider controller
0.2.2containerMar 26, 2026
butler-provider-aws
AWS provider controller
0.1.1containerMar 26, 2026
butler-provider-gcp
GCP provider controller
--container--
butler-provider-azure
Azure provider controller
--container--
butler-image-factory
OS image building and hosting service
--container--
butler-portal
Backstage-based developer portal
0.1.2containerFeb 19, 2026
butler-charts
Helm charts for deployment
0.10.0helmApr 3, 2026

Quick Install​

# Install Butler CRDs
helm install butler-crds oci://ghcr.io/butlerdotdev/charts/butler-crds

# Install Butler Controller
helm install butler-controller oci://ghcr.io/butlerdotdev/charts/butler-controller

Steward​

ComponentLatestTypeReleased
steward
Core operator
0.4.0containerMar 23, 2026
capi-steward
Cluster API control plane provider
0.3.0containerFeb 12, 2026
steward-tcp-proxy
TCP proxy for control plane access
0.2.0container--

Quick Install​

# Install Steward
helm install steward oci://ghcr.io/butlerdotdev/charts/steward

Version Policy​

Butler Labs projects follow Semantic Versioning:

  • Major (X.0.0) -- Breaking changes to APIs or CRDs
  • Minor (0.X.0) -- New features, backwards compatible
  • Patch (0.0.X) -- Bug fixes, backwards compatible

All pre-1.0 releases may include breaking changes in minor versions.