Merge pull request #5588 from nawazkh/reuse_aks_mgmt_cluster

add make target to reuse existing AKS Cluster as mgmt cluster

Author: k8s-ci-robot

Makefile

@@ -796,6 +796,14 @@ kind-reset: $(KIND) ## Destroys the "capz" and "capz-e2e" kind clusters.
 	$(KIND) delete cluster --name=$(KIND_CLUSTER_NAME) || true
 	$(KIND) delete cluster --name=capz-e2e || true
 
+.PHONY: aks-cleanup
+aks-cleanup: $(KUBECTL) ## Deletes deployments, secrets and service-accounts from existing AKS as mgmt cluster
+	@ASO_CRDS_PATH=$(ASO_CRDS_PATH) \
+	CRD_ROOT=$(CRD_ROOT) \
+	DELETE_CRDS=$${DELETE_CRDS:-"false"} \
+	MGMT_CLUSTER_NAME=$${MGMT_CLUSTER_NAME:-} \
+	./scripts/reuse-existing-aks-cluster.sh
+
 ## --------------------------------------
 ## Tooling Binaries
 ## --------------------------------------

scripts/reuse-existing-aks-cluster.sh

@@ -0,0 +1,130 @@
+#!/usr/bin/env bash
+# Copyright 2025 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit # exit immediately if a command exits with a non-zero status.
+set -o nounset # exit when script tries to use undeclared variables.
+set -o pipefail # make the pipeline fail if any command in it fails.
+
+# Color definitions
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+NC='\033[0m' # No Color
+
+# Initialize variables
+KUBE_CONTEXT=""
+
+# Functions to print colored messages
+print_success() {
+    echo -e "${GREEN} $1${NC}" >&2;
+}
+
+print_info() {
+    echo -e "${CYAN} $1${NC}" >&2;
+}
+
+print_warning() {
+    echo -e "${YELLOW} $1${NC}" >&2;
+}
+
+
+print_error() {
+    echo -e "${RED} $1${NC}" >&2;
+}
+
+parse_args() {
+
+    # Check if MGMT_CLUSTER_NAME is set, if yes, use it as the context
+    if [ -n "${MGMT_CLUSTER_NAME:-}" ]; then
+        KUBE_CONTEXT="${MGMT_CLUSTER_NAME}"
+        print_info "using MGMT_CLUSTER_NAME: $KUBE_CONTEXT"
+
+        if ! kubectl config use-context "$KUBE_CONTEXT" >/dev/null 2>&1; then
+            print_error "Failed to switch to context '$KUBE_CONTEXT'"
+            exit 1
+        fi
+    fi
+
+    if [ -z "$KUBE_CONTEXT" ]; then
+        KUBE_CONTEXT=$(kubectl config current-context)
+        print_warning "no context provided – using current context: $KUBE_CONTEXT" >&2
+    fi
+}
+
+check_aks_cluster_exists() {
+    # Check if the AKS cluster exists
+    if ! az aks show --name "$KUBE_CONTEXT" --resource-group "$KUBE_CONTEXT" >/dev/null 2>&1; then
+        print_error "AKS cluster '$KUBE_CONTEXT' does not exist"
+        exit 1
+    fi
+}
+
+delete_resources() {
+    local -r resources=("deployment" "secret" "serviceaccount")
+    local -r namespaces=("capz-system" "caaph-system" "capi-kubeadm-bootstrap-system" "capi-kubeadm-control-plane-system" "capi-system")
+
+    for resource in "${resources[@]}"; do
+        print_info "Deleting all the ${resource}s from namespaces: ${namespaces[*]}"
+        for namespace in "${namespaces[@]}"; do
+            kubectl delete "${resource}" -n "${namespace}" --all
+        done
+    done
+}
+
+delete_crds() {
+    # delete all the CRDs from the ASO_CRDS_PATH. ASO_CRDS_PATH is defined in Makefile.
+    # ASO_CRDS_PATH has the path to the yaml that has all the CRDs required for ASO.
+    print_info "Deleting all the CRDs from the ASO_CRDS_PATH using kubectl delete -f ${ASO_CRDS_PATH}"
+    if ! kubectl delete -f "${ASO_CRDS_PATH}" --force 2>/dev/null; then
+        print_warning "No ASO CRDs found or error deleting them, continuing..."
+    else
+        print_success "Successfully deleted ASO CRDs"
+    fi
+
+    # delete all the CRDs from the CRD_ROOT. CRD_ROOT is defined in Makefile.
+    # CRD_ROOT leads to a directory with a list of CRD yaml files for CAPZ.
+    print_info "Deleting all the CRDs from the CRD_ROOT"
+    for crd_file in "${CRD_ROOT:-}"/*; do
+        if [ -f "$crd_file" ]; then
+            if ! kubectl delete -f "$crd_file" --force 2>/dev/null; then
+                print_warning "Failed to delete CRD from $crd_file, continuing..."
+            else
+                print_success "Successfully deleted CRDs from $crd_file"
+            fi
+        fi
+    done
+}
+
+main() {
+    # Parse arguments and read into variables
+    parse_args "$@"
+    print_success "Successfully initialized with context: $KUBE_CONTEXT"
+
+    check_aks_cluster_exists
+    delete_resources
+
+    if [ "${DELETE_CRDS:-}" == "true" ]; then
+        delete_crds
+    fi
+
+    # Once the deployments are deleted, the AKS cluster is ready to be reused
+    print_success "AKS cluster '$KUBE_CONTEXT' is ready to be reused"
+}
+
+# Only run main if script is executed directly (not sourced)
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    main "$@"
+fi