Add Flatcar Container Linux template

templates/flavors/flatcar/kustomization.yaml

@@ -0,0 +1,9 @@
+namespace: default
+resources:
+  - ../base
+  - machine-deployment.yaml
+  - ../../azure-cluster-identity
+
+patchesStrategicMerge:
+  - patches/kubeadm-controlplane.yaml
+  - ../../azure-cluster-identity/azurecluster-identity-ref.yaml

templates/flavors/flatcar/machine-deployment.yaml

@@ -0,0 +1,80 @@
+---
+apiVersion: cluster.x-k8s.io/v1beta1
+kind: MachineDeployment
+metadata:
+  name: ${CLUSTER_NAME}-md-0
+spec:
+  clusterName: ${CLUSTER_NAME}
+  replicas: ${WORKER_MACHINE_COUNT}
+  selector:
+    matchLabels: null
+  template:
+    spec:
+      bootstrap:
+        configRef:
+          apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
+          kind: KubeadmConfigTemplate
+          name: ${CLUSTER_NAME}-md-0
+      clusterName: ${CLUSTER_NAME}
+      infrastructureRef:
+        apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
+        kind: AzureMachineTemplate
+        name: ${CLUSTER_NAME}-md-0
+      version: ${KUBERNETES_VERSION}
+---
+apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
+kind: AzureMachineTemplate
+metadata:
+  name: ${CLUSTER_NAME}-md-0
+spec:
+  template:
+    spec:
+      image:
+        computeGallery:
+          gallery: capiMatTestWE2-3282f15c-906a-4c4b-b206-eb3c51adb5be
+          name: flatcar-stable-capi-${KUBERNETES_VERSION}
+          version: 3139.2.3
+      osDisk:
+        diskSizeGB: 128
+        osType: Linux
+      sshPublicKey: ${AZURE_SSH_PUBLIC_KEY_B64:=""}
+      vmSize: ${AZURE_NODE_MACHINE_TYPE}
+---
+apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
+kind: KubeadmConfigTemplate
+metadata:
+  name: ${CLUSTER_NAME}-md-0
+spec:
+  template:
+    spec:
+      files:
+      - contentFrom:
+          secret:
+            key: worker-node-azure.json
+            name: ${CLUSTER_NAME}-md-0-azure-json
+        owner: root:root
+        path: /etc/kubernetes/azure.json
+        permissions: "0644"
+      format: ignition
+      ignition:
+        containerLinuxConfig:
+          additionalConfig: |
+            systemd:
+              units:
+              - name: kubeadm.service
+                dropins:
+                - name: 10-flatcar.conf
+                  contents: |
+                    [Unit]
+                    After=oem-cloudinit.service
+      joinConfiguration:
+        nodeRegistration:
+          kubeletExtraArgs:
+            azure-container-registry-config: /etc/kubernetes/azure.json
+            cloud-config: /etc/kubernetes/azure.json
+            cloud-provider: azure
+          name: '@@HOSTNAME@@'
+      postKubeadmCommands: []
+      preKubeadmCommands:
+      - sed -i "s/@@HOSTNAME@@/$(curl -s -H Metadata:true --noproxy '*' 'http://169.254.169.254/metadata/instance?api-version=2020-09-01'
+        | jq -r .compute.name)/g" /etc/kubeadm.yml