Add a pv-provisioning demo

micro-demos/pv-provisioning/claim.yaml

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+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  namespace: demos
+  name: pv-provisioning-demo
+  labels:
+    demo: pv-provisioning
+  annotations:
+    volume.alpha.kubernetes.io/storage-class: anything
+spec:
+  accessModes: [ "ReadWriteOnce" ]
+  resources:
+    requests:
+      storage: 10Gi
+

micro-demos/pv-provisioning/demo.sh

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+#!/bin/bash
+# Copyright 2015 The Kubernetes Authors All rights reserved.
+#
+# 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.
+
+
+. $(dirname ${BASH_SOURCE})/../util.sh
+
+desc "There are no claims"
+run "kubectl --namespace=demos get pvc"
+
+desc "Create a claim"
+run "cat $(relative claim.yaml)"
+run "kubectl --namespace=demos create -f $(relative claim.yaml)"
+
+desc "Check it out"
+run "kubectl --namespace=demos describe pvc pv-provisioning-demo"
+
+desc "Wait for it to be satisfied"
+run "while true; do
+    X=\$(kubectl --namespace=demos get pvc pv-provisioning-demo);
+    echo \"\$X\";
+    echo \$X | grep Bound >/dev/null && break;
+    sleep 1;
+    done"
+
+desc "You can see it in gcloud"
+run "gcloud compute disks list | grep kubernetes-dynamic"
+
+desc "Create a pod using the claim"
+run "cat $(relative pod.yaml)"
+run "kubectl --namespace=demos create -f $(relative pod.yaml)"
+
+desc "Here's the pod"
+run "kubectl --namespace=demos describe pods -l demo=pv-provisioning"
+
+desc "Wait for it to be running"
+run "while true; do
+    X=\$(kubectl --namespace=demos get pods -l demo=pv-provisioning);
+    echo \"\$X\";
+    echo \$X | grep Running >/dev/null && break;
+    sleep 1;
+    done"
+
+POD=$(kubectl --namespace=demos get pods -l demo=pv-provisioning -o name | cut -d/ -f2)
+desc "Shell into it"
+run "kubectl --namespace=demos exec --tty -i $POD sh"
+
+desc "Kill the pod"
+run "kubectl --namespace=demos delete pods -l demo=pv-provisioning"
+run "kubectl --namespace=demos get pods -l demo=pv-provisioning"
+
+desc "The claim still exists"
+run "kubectl --namespace=demos describe pvc pv-provisioning-demo"
+
+desc "The disk still exists"
+run "gcloud compute disks list | grep kubernetes-dynamic"
+
+desc "Run another pod using the same claim"
+run "kubectl --namespace=demos create -f $(relative pod.yaml)"
+
+desc "Wait for it to be running"
+run "while true; do
+    X=\$(kubectl --namespace=demos get pods -l demo=pv-provisioning);
+    echo \"\$X\";
+    echo \$X | grep Running >/dev/null && break;
+    sleep 1;
+    done"
+
+POD=$(kubectl --namespace=demos get pods -l demo=pv-provisioning -o name | cut -d/ -f2)
+desc "Shell into the new one"
+run "kubectl --namespace=demos exec --tty -i $POD sh"
+
+desc "Tear it down"
+run "kubectl --namespace=demos delete pods -l demo=pv-provisioning"
+run "kubectl --namespace=demos get pods -l demo=pv-provisioning"
+run "kubectl --namespace=demos delete pvc -l demo=pv-provisioning"
+run "kubectl --namespace=demos get pvc -l demo=pv-provisioning"
+run "kubectl --namespace=demos get pv"

micro-demos/pv-provisioning/pod.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  namespace: demos
+  generateName: pv-provisioning-demo-
+  labels:
+    demo: pv-provisioning
+spec:
+  terminationGracePeriodSeconds: 0
+  containers:
+  - name: busybox
+    image: busybox
+    command:
+    - sh
+    - -c
+    - touch /pv/`hostname`; while true; do sleep 3600; done
+    volumeMounts:
+    - name: pv
+      mountPath: /pv
+  volumes:
+  - name: pv
+    persistentVolumeClaim:
+      claimName: pv-provisioning-demo