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Add aks example (#12)
Initial commit for simple AKS cluster implementation
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‎examples/aks-cluster/README.md‎

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# AKS Cluster Example
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This example demonstrates how to provision an AKS cluster using Crossplane v1.
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## Prerequisites
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- Kubernetes cluster (v1.31+)
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- Helm v3.x
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## Install Crossplane v1 via Helm
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1. **Add the Crossplane Helm repository:**
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```sh
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helm repo add crossplane-stable https://charts.crossplane.io/stable
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helm repo update
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```
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2. **Install Crossplane v1:**
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```sh
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helm install crossplane --namespace crossplane-system --create-namespace crossplane-stable/crossplane --version 1.x.x
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```
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Replace `1.x.x` with the desired Crossplane v1 release.
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3. **Verify installation:**
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```sh
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kubectl get pods -n crossplane-system
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```
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4. **Apply the manifests:**
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```sh
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./install.sh
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```

‎examples/aks-cluster/cluster-function-pythonic.yaml‎

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apiVersion: pkg.crossplane.io/v1
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kind: Function
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metadata:
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name: function-pythonic
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spec:
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package: ghcr.io/fortra/function-pythonic:v0.0.8
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runtimeConfigRef:
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name: function-pythonic
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---
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apiVersion: pkg.crossplane.io/v1beta1
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kind: DeploymentRuntimeConfig
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metadata:
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name: function-pythonic
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spec:
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deploymentTemplate:
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spec:
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selector: {}
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template:
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spec:
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containers:
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- name: package-runtime
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args:
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- --debug
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- --packages
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- --packages-namespace=crossplane-system
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serviceAccountName: function-pythonic
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serviceAccountTemplate:
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metadata:
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name: function-pythonic
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: Role
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metadata:
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namespace: crossplane-system
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name: function-pythonic
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rules:
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- apiGroups:
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- ''
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resources:
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- configmaps
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verbs:
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- list
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- watch
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- patch
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- apiGroups:
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- ''
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resources:
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- events
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verbs:
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- create
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: RoleBinding
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metadata:
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namespace: crossplane-system
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name: function-pythonic
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: Role
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name: function-pythonic
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subjects:
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- kind: ServiceAccount
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name: function-pythonic

‎examples/aks-cluster/composition.yaml‎

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apiVersion: apiextensions.crossplane.io/v1
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kind: Composition
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metadata:
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name: aks-cluster
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spec:
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compositeTypeRef:
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apiVersion: example.crossplane.io/v1
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kind: AzureKubernetesCluster
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mode: Pipeline
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pipeline:
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- step: create-resourcegroup
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functionRef:
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name: function-pythonic
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input:
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apiVersion: pythonic.fn.fortra.com/v1alpha1
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kind: Composite
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composite: resourcegroup.ResourceGroupComposite
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- step: create-aks-cluster
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functionRef:
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name: function-pythonic
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input:
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apiVersion: pythonic.fn.fortra.com/v1alpha1
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kind: Composite
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composite: kubernetescluster.KubernetesClusterComposite

‎examples/aks-cluster/definition.yaml‎

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apiVersion: apiextensions.crossplane.io/v1
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kind: CompositeResourceDefinition
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metadata:
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name: azurekubernetesclusters.example.crossplane.io
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spec:
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group: example.crossplane.io
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names:
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kind: AzureKubernetesCluster
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plural: azurekubernetesclusters
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claimNames:
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kind: AzureKubernetesClusterClaim
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plural: azurekubernetesclusterclaims
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versions:
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- name: v1
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served: true
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referenceable: true
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schema:
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openAPIV3Schema:
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type: object
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properties:
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spec:
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type: object
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properties:
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defaultNodePool:
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type: object
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properties:
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autoScaling:
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type: object
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properties:
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enabled:
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type: boolean
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minCount:
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type: integer
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maxCount:
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type: integer
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nodeCount:
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type: integer
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vmSize:
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type: string
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resourceGroupName:
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type: string
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location:
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type: string

‎examples/aks-cluster/functions.yaml‎

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apiVersion: pkg.crossplane.io/v1beta1
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kind: Function
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metadata:
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name: function-pythonic
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annotations:
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render.crossplane.io/runtime: Development
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spec:
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package: ghcr.io/fortra/function-pythonic:v0.0.8
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runtimeConfigRef:
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name: function-pythonic

‎examples/aks-cluster/install.sh‎

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#!/usr/bin/env bash
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# Install function-pythonic and azure providers
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kubectl apply -f cluster-function-pythonic.yaml
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kubectl apply -f providers.yaml
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# Install AKS Crossplane XRDs and Compositions
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kubectl apply -f definition.yaml
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# Wait for the generated CRDs to be created
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sleep 5
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# Create the AKS cluster
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kubectl apply -k .

‎examples/aks-cluster/kubernetescluster.py‎

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from crossplane.pythonic import BaseComposite
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class KubernetesClusterComposite(BaseComposite):
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def compose(self):
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labels = {'example.crossplane.io/AzureKubernetesCluster': self.metadata.name}
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self.logger.info(f"Composing AKS cluster {self.metadata.name}")
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aks = self.resources.KubernetesCluster(
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'containerservice.azure.upbound.io/v1beta2', 'KubernetesCluster'
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)
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aks.metadata.name = self.metadata.name
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aks.metadata.labels = labels
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aks.spec.forProvider.location = self.spec.location
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aks.spec.forProvider.resourceGroupNameRef.name = self.spec.resourceGroupName
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aks.spec.forProvider.identity.type = 'SystemAssigned'
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if self.spec.defaultNodePool.autoScaling.enabled:
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aks.spec.forProvider.defaultNodePool.autoScalingEnabled = True
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aks.spec.forProvider.defaultNodePool.minCount = self.spec.defaultNodePool.autoScaling.minCount
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aks.spec.forProvider.defaultNodePool.maxCount = self.spec.defaultNodePool.autoScaling.maxCount
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else:
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aks.spec.forProvider.defaultNodePool.nodeCount = self.spec.nodeCount
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aks.spec.forProvider.defaultNodePool.name = 'systempool1'
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aks.spec.forProvider.defaultNodePool.vmSize = self.spec.vmSize
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aks.spec.forProvider.dnsPrefix = self.metadata.name
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self.status.aks = aks.status.endpoint

‎examples/aks-cluster/kustomization.yaml‎

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apiVersion: kustomize.config.k8s.io/v1beta1
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kind: Kustomization
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generatorOptions:
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disableNameSuffixHash: true
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configMapGenerator:
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- namespace: crossplane-system
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name: pythonic-aks
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options:
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labels:
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function-pythonic.package: ''
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files:
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- kubernetescluster.py
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- resourcegroup.py
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resources:
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- composition.yaml
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- xr.yaml

‎examples/aks-cluster/providers.yaml‎

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---
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apiVersion: pkg.crossplane.io/v1
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kind: Provider
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metadata:
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name: upbound-provider-family-azure
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spec:
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package: xpkg.upbound.io/upbound/provider-family-azure:v1
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---
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apiVersion: pkg.crossplane.io/v1
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kind: Provider
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metadata:
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name: upbound-provider-azure-containerservice
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spec:
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package: xpkg.upbound.io/upbound/provider-azure-containerservice:v1

‎examples/aks-cluster/render.sh‎

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#!/usr/bin/env bash
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# In one terminal
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# PYTHONPATH=. function-pythonic --insecure --debug
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# In another terminal:
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cd $(dirname $(realpath $0))
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exec crossplane render xr.yaml composition.yaml functions.yaml

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