新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch05/storageClass/clone-storageClass-script.yaml

@@ -0,0 +1,28 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: clone-script
+data:
+  duplicate-default-storage-class.sh: |-
+    #!/bin/sh
+    apk add --no-cache jq > /dev/null
+    cat /defaultStorageClass.json | \
+    jq '.metadata={}' | \
+    jq '.metadata.name="kiamol"'
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: clone-sc
+spec:
+  containers:
+  - name: clone
+    image: kiamol/ch03-sleep
+    volumeMounts:
+    - name: scripts
+      mountPath: "/scripts"
+  volumes:
+    - name: scripts
+      configMap:
+        name: clone-script            
+        defaultMode: 0500

learn/learn-kubernetes-master/kiamol/ch05/storageClass/postgres-persistentVolumeClaim-storageClass.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgres-pvc-kiamol
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: kiamol
+  resources:
+    requests:
+      storage: 100Mi

learn/learn-kubernetes-master/kiamol/ch05/storageClass/todo-db.yaml

@@ -0,0 +1,35 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: todo-db
+spec:
+  selector:
+    matchLabels:
+      app: todo-db
+  template:
+    metadata:
+      labels:
+        app: todo-db
+    spec:
+      containers:
+        - name: db
+          image: postgres:11.6-alpine
+          env:
+          - name: POSTGRES_PASSWORD_FILE
+            value: /secrets/postgres_password
+          volumeMounts:
+            - name: secret
+              mountPath: "/secrets"
+            - name: data
+              mountPath: /var/lib/postgresql/data
+      volumes:
+        - name: secret
+          secret:
+            secretName: todo-db-secret
+            defaultMode: 0400
+            items:
+            - key: POSTGRES_PASSWORD
+              path: postgres_password
+        - name: data
+          persistentVolumeClaim:
+            claimName: postgres-pvc-kiamol