openfaas: Support OpenFaaS Cloud

Only client is used as function (using node runtime):

Usage:

```
echo '{ "hostname": "ifconfig.io", "port": 80 , "path":"/all.json" }' \
  | curl -H "Content-Type: application/json" -X POST -d @- \
  https://rzr.o6s.io/iotjs-express

```

Relate-to: github.com/openfaas/openfaas-cloud/pull/523
Change-Id: I49ca87f508a52e922414f86cbce2e40487fb023a
Signed-off-by: Philippe Coval <p.coval@samsung.com>

extra/tools/openfaas/Dockerfile

@@ -0,0 +1,28 @@
+#!/bin/echo docker build . -f
+# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: MIT
+#{
+# Copyright 2019-present Samsung Electronics France SAS, and other contributors
+#
+# This Source Code Form is subject to the terms of the MIT Licence
+# If a copy of the MIT was not distributed with this file
+# You can obtain one at:
+# https://spdx.org/licenses/MIT.html
+#}
+
+FROM rzrfreefr/iotjs-express:latest
+LABEL maintainer "Philippe Coval (p.coval@samsung.com)"
+
+ENV project iotjs-express-openfaas
+COPY . /usr/local/opt/${project}/src/${project}/
+WORKDIR /usr/local/opt/${project}/src/${project}/
+
+ADD https://github.com/openfaas/faas/releases/download/0.6.9/fwatchdog /usr/bin
+RUN chmod +x /usr/bin/fwatchdog
+
+ENV read_timeout="60"
+ENV write_timeout="60"
+ENV fprocess="xargs iotjs --help"
+
+HEALTHCHECK --interval=5s CMD [ -e /tmp/.lock ] || exit 1
+CMD [ "fwatchdog" ]

extra/tools/openfaas/handler.js

@@ -0,0 +1,6 @@
+"use strict"
+var ClientRequest = require('iotjs-express/example/client');
+
+module.exports = (context, callback) => {
+  ClientRequest(JSON.parse(context || {}), callback);
+}

extra/tools/openfaas/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "function",
+  "version": "1.0.0",
+  "description": "",
+  "main": "handler.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "iotjs-express": "0.0.12"
+  }
+}

stack.yml

@@ -0,0 +1,9 @@
+version: 1.0
+provider:
+  name: openfaas
+  gateway: http://127.0.0.1:8080
+functions:
+  iotjs-express:
+    lang: node
+    handler: ./extra/tools/openfaas
+    image: rzrfreefr/iotjs-express-openfaas:latest