A trivial guestbook app

Functions for GET and POST endpoints. A redis.yaml to deploy redis on kubernetes. And a deploy.sh to deploy the fission functions with routes.
2017-01-18 15:30:51 -08:00
parent 9ffba72c11
commit 928d96c080
4 changed files with 104 additions and 0 deletions
@@ -0,0 +1,16 @@
+#
+# Handles POST /guestbook -- adds item to guestbook 
+#
+
+from flask import request, redirect
+import redis
+
+# Connect to redis.
+redisConnection = redis.StrictRedis(host='redis.guestbook', port=6379, db=0)
+
+def main():
+    # Read the item from POST params, add it to redis, and redirect
+    # back to the list
+    item = request.form['text']
+    redisConnection.rpush('guestbook', item)
+    return redirect('/guestbook', code=303)
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+set -e
+
+kubectl create -f redis.yaml
+
+if [ -z "$FISSION_URL" ]
+then
+    echo "Need $FISSION_URL set to a fission controller address"
+    exit 1
+fi
+
+fission env create --name python --image fission/python-env
+fission function create --name guestbook-get --env python --code get.py --url /guestbook --method GET
+fission function create --name guestbook-add --env python --code add.py --url /guestbook --method POST
@@ -0,0 +1,28 @@
+#
+# Handles GET /guestbook -- returns a list of items in the guestbook
+# with a form to add more.
+#
+
+from flask import current_app, escape
+import redis
+
+# Connect to redis.  This is run only when this file is loaded; as
+# long as the pod is alive, the connection is reused.
+redisConnection = redis.StrictRedis(host='redis.guestbook', port=6379, db=0)
+
+def main():
+    messages = redisConnection.lrange('guestbook', 0, -1)
+
+    items = [("<li>%s</li>" % escape(m.decode('utf-8'))) for m in messages]
+    ul = "<ul>%s</ul>" % "\n".join(items)
+    return """
+      <html><body>
+          <h1>Guestbook</h1>      
+          <form action="/guestbook" method="POST">
+            <input type="text" name="text">
+            <button type="submit">Add</button>
+          </form>
+          <hr/>
+          %s
+      </body></html>
+      """ % ul
@@ -0,0 +1,45 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: guestbook
+  labels:
+    name: guestbook
+
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    run: redis
+  name: redis
+  namespace: guestbook
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      run: redis
+  template:
+    metadata:
+      labels:
+        run: redis
+    spec:
+      containers:
+      - image: redis
+        name: redis
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    run: redis
+  name: redis
+  namespace: guestbook
+spec:
+  selector:
+    run: redis
+  type: ClusterIP
+  ports:
+  - port: 6379
+    protocol: TCP
+    targetPort: 6379