Remove deprecated v1alpha1 API

v1alpha1 was superseded by v1alpha2 in v0.6.0 (August 2023) and has been
formally deprecated since v0.9.0 (January 2024).  Keeping it around inflates
the test matrix, blocks upcoming schema work for v1beta1, and adds
maintenance overhead.

This patch deletes:
  • api/v1alpha1 types, defaults, conversions
  • legacy manifests under config/crd/v1alpha1
  • v1alpha1‐specific webhooks and tests

**Breaking change** – clusters must migrate existing CRs to v1alpha2 before
upgrading.

Author: Fedosin

.golangci.yaml

@@ -101,8 +101,6 @@ linters:
         - pkg: sigs.k8s.io/cluster-api/cmd/clusterctl/client/config
           alias: configclient
         # CAPI Operator
-        - pkg: sigs.k8s.io/cluster-api-operator/api/v1alpha1
-          alias: operatorv1alpha1
         - pkg: sigs.k8s.io/cluster-api-operator/api/v1alpha2
           alias: operatorv1
         - pkg: sigs.k8s.io/cluster-api-operator/internal/controller

Makefile

@@ -341,7 +341,6 @@ verify-gen: generate
 generate: $(CONTROLLER_GEN) $(HELM) release-chart ## Generate code
 	$(MAKE) generate-manifests
 	$(MAKE) generate-go
-	$(MAKE) generate-go-conversions
 	$(HELM) template capi-operator $(CHART_PACKAGE_DIR)/$(PACKAGE_NAME)-$(HELM_CHART_TAG).tgz > test/e2e/resources/full-chart-install.yaml
 
 .PHONY: generate-go
@@ -364,15 +363,6 @@ generate-manifests: $(CONTROLLER_GEN) ## Generate manifests for the operator e.g
 		output:webhook:dir=./config/webhook \
 		webhook
 
-.PHONY: generate-go-conversions
-generate-go-conversions: $(CONVERSION_GEN) ## Generate conversions go code
-	$(MAKE) clean-generated-conversions SRC_DIRS="./api/v1alpha1"
-	$(CONVERSION_GEN) \
-		--input-dirs=./api/v1alpha1 \
-		--build-tag=ignore_autogenerated_core \
-		--output-file-base=zz_generated.conversion $(CONVERSION_GEN_OUTPUT_BASE) \
-		--go-header-file=$(ROOT)/hack/boilerplate.go.txt
-
 .PHONY: modules
 modules: ## Runs go mod to ensure modules are up to date.
 	go mod tidy

PROJECT

@@ -8,39 +8,6 @@ layout:
 projectName: cluster-api-operator-migration
 repo: sigs.k8s.io/cluster-api-operator
 resources:
-- api:
-    crdVersion: v1
-    namespaced: true
-  controller: true
-  domain: cluster.x-k8s.io
-  group: operator
-  kind: CoreProvider
-  path: sigs.k8s.io/cluster-api-operator/api/v1alpha1
-  version: v1alpha1
-- api:
-    crdVersion: v1
-    namespaced: true
-  domain: cluster.x-k8s.io
-  group: operator
-  kind: BootstrapProvider
-  path: sigs.k8s.io/cluster-api-operator/api/v1alpha1
-  version: v1alpha1
-- api:
-    crdVersion: v1
-    namespaced: true
-  domain: cluster.x-k8s.io
-  group: operator
-  kind: ControlPlaneProvider
-  path: sigs.k8s.io/cluster-api-operator/api/v1alpha1
-  version: v1alpha1
-- api:
-    crdVersion: v1
-    namespaced: true
-  domain: cluster.x-k8s.io
-  group: operator
-  kind: InfrastructureProvider
-  path: sigs.k8s.io/cluster-api-operator/api/v1alpha1
-  version: v1alpha1
 - api:
     crdVersion: v1
     namespaced: true