Serverless Frameworkのプラクティス。Lambda上で環境変数を読み込んで、SlackにPostするやつを作る

handler.js

'use strict';

function slack_post(message) {
  var Slack = require('slack-node');

  var slack = new Slack();
  slack.setWebhook(process.env.WEBHOOK_URL);

  slack.webhook({
    channel: process.env.CHANNEL,
    username: process.env.USERNAME,
    text: message,
  }, function(err, response) {
    console.log(response);
  });
};


module.exports.hello = (event, context, callback) => {
  slack_post("てすとめっせーじですよん");
};

package.json

{
  name: sample,
  "version": "0.0.0",
  description: "",
  devDependencies: {
    slack-node: ""
  }
}

serverless.yml

service: slack-post

provider:
  name: aws
  runtime: nodejs4.3
  stage: dev
  region: ap-northeast-1

package:
  include:
    - node_modules/**

functions:
  cron:
    handler: handler.hello
    environment:
      WEBHOOK_URL: 'https://hooks.slack.com/services/12341234/12341234/1234123412341234'
      CHANNEL: '#general'
      USERNAME: 'LambdaNotification'
    events:
      - schedule: rate(1 minute)

plugins:
  - serverless-run-function-plugin