kubelet-csr-approver: Initial commit

The [kubelet-csr-approver][0] is a controller that automatically approves
CSRs for Kublets that match certain criteria.  I've had it deployed in
the cluster for a while, but apparently never committed the resources.
These manifest files are taken from the [k8s deployment example][1] in
the upstream repository.

[0]: https://github.com/postfinance/kubelet-csr-approver
[1]: https://github.com/postfinance/kubelet-csr-approver/tree/v1.2.10/deploy/k8s

kubelet-csr-approver/kustomization.yaml

@@ -0,0 +1,42 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+labels:
+- pairs:
+    app.kubernetes.io/instance: kubelet-csr-approver
+
+resources:
+- clusterrole.yaml
+- deployment.yaml
+- rolebinding.yaml
+- serviceaccount.yaml
+
+patches:
+- patch: |-
+    apiVersion: apps/v1
+    kind: Deployment
+    metadata:
+      name: kubelet-csr-approver
+      namespace: kube-system
+    spec:
+      template:
+        spec:
+          containers:
+          - name: kubelet-csr-approver
+            imagePullPolicy: IfNotPresent
+            env:
+            - name: PROVIDER_REGEX
+              value: ^(i-[a-z0-9]+\.[a-z0-9-]+\.compute\.internal|k8s-[a-z0-9-]+\.pyrocufflink\.blue|[a-z0-9-]+\.k8s\.pyrocufflink\.black)$
+            - name: PROVIDER_IP_PREFIXES
+              value: 172.30.0.0/16
+            - name: BYPASS_DNS_RESOLUTION
+              value: 'true'
+
+replicas:
+- name: kubelet-csr-approver
+  count: 1
+
+images:
+- name: postfinance/kubelet-csr-approver
+  newName: ghcr.io/postfinance/kubelet-csr-approver
+  newTag: v1.2.10