diff --git a/README.md b/README.md index 2a821b7c1..57baaad72 100644 --- a/README.md +++ b/README.md @@ -60,6 +60,7 @@ serverless install -u https://github.com/serverless/examples/tree/master/folder- | [Serverless Github Check](https://github.com/serverless/examples/tree/master/aws-node-github-check) | nodeJS | | [Aws Github Webhook Listener](https://github.com/serverless/examples/tree/master/aws-node-github-webhook-listener)
Extend your github repositories with this github webhook listener | nodeJS | | [Aws Node Graphql Api With Dynamodb](https://github.com/serverless/examples/tree/master/aws-node-graphql-api-with-dynamodb)
A single-module GraphQL endpoint with query and mutation functionality. | nodeJS | +| [Aws Lambda And Heroku Postgres](https://github.com/serverless/examples/tree/master/aws-node-heroku-postgres)
Shows how to connect AWS Lambda to Heroku Postgres. Uses an api:release Heroku webhook and the Heroku API to handle automatic Heroku Postgres credential rotation. | nodeJS | | [Aws Iot Event](https://github.com/serverless/examples/tree/master/aws-node-iot-event)
Example on how to setup a AWS IoT Rule to send events to a Lambda function | nodeJS | | [Dropbox](https://github.com/serverless/examples/tree/master/aws-node-oauth-dropbox-api)
dropbox integration | nodeJS | | [Aws Node Puppeteer](https://github.com/serverless/examples/tree/master/aws-node-puppeteer)
When it comes to AWS Lambda function , they have their own limits as follows ![AWS Limits](./images/aws_limits.png) So , When you try to use Puppeteer your deployment package size(unzipped) easily go's above 250 mb because When you install Puppeteer, it downloads a recent version of Chromium (~170MB Mac, ~282MB Linux, ~280MB Win) that is guaranteed to work with the API. | nodeJS | diff --git a/aws-node-heroku-postgres/.gitignore b/aws-node-heroku-postgres/.gitignore new file mode 100644 index 000000000..2b48c8bd5 --- /dev/null +++ b/aws-node-heroku-postgres/.gitignore @@ -0,0 +1,6 @@ +# package directories +node_modules +jspm_packages + +# Serverless directories +.serverless \ No newline at end of file diff --git a/aws-node-heroku-postgres/README.md b/aws-node-heroku-postgres/README.md new file mode 100644 index 000000000..5e1815677 --- /dev/null +++ b/aws-node-heroku-postgres/README.md @@ -0,0 +1,14 @@ + +# aws-node-heroku-postgres + +An example app, created in this [blog post](https://mattwelke.com/2019/01/06/free-tier-managed-sql-with-aws-lambda-and-heroku-postgres.html), showing how to connect AWS Lambda to Heroku Postgres. Uses an `api:release` Heroku webhook and the Heroku API to handle automatic Heroku Postgres credential rotation. diff --git a/aws-node-heroku-postgres/handler.js b/aws-node-heroku-postgres/handler.js new file mode 100644 index 000000000..3e875dbbf --- /dev/null +++ b/aws-node-heroku-postgres/handler.js @@ -0,0 +1,86 @@ +// handler.js +'use strict'; + +const express = require('express'); +const serverless = require('serverless-http'); +const pg = require('pg'); +const axios = require('axios'); +const parsePgConnStr = require('pg-connection-string').parse; + +// Replace with your token or API key and your Heroku Postgres resource name +const herokuApiKey = ''; +const herokuPostgresId = ''; +const herokuClient = axios.create({ + baseURL: 'https://api.heroku.com/', + headers: { + 'Authorization': `Bearer ${herokuApiKey}`, + 'Accept': 'application/vnd.heroku+json; version=3', + }, +}); + +let pgConfig; +let pgPool; + +const app = express(); + +const createConn = async () => { + console.log('Creating PG connection.'); + + const credsResponse = await herokuClient.get(`addons/${herokuPostgresId}/config`); + const pgConnStr = credsResponse.data[0]['value']; + + pgConfig = { + ...parsePgConnStr(pgConnStr), ...{ + max: 1, + ssl: true, + }, + }; + + pgPool = new pg.Pool(pgConfig); +}; + +const performQuery = async () => { + const client = await pgPool.connect(); + const result = await client.query('SELECT now()'); + client.release(); + return result; +}; + +app.get('/hello', async function (req, res) { + if (!pgPool) { + // Cold start. Get Heroku Postgres creds and create pool. + await createConn(); + } else { + console.log('Using existing PG connection.'); + } + + try { + const result = await performQuery(); + + res.json({ + result: `According to PostgreSQL, the time is: ${result.rows[0].now}`, + pgConfigUsed: pgConfig, + }); + return; + } catch (e) { + res.json({ + error: e.message, + }); + return; + } + +}); + +app.post('/onrelease', async function (req, res) { + // Get Heroku Postgres creds and replace pool with new one. + await createConn(); + + // Response with 2xx response so Heroku knows webhook was successful. + // Response body doesn't matter. + res.status(204).send(); +}); + +module.exports = { + app, + hello: serverless(app), +}; diff --git a/aws-node-heroku-postgres/index.js b/aws-node-heroku-postgres/index.js new file mode 100644 index 000000000..94bca9ee4 --- /dev/null +++ b/aws-node-heroku-postgres/index.js @@ -0,0 +1,8 @@ +// index.js +'use strict'; + +const { app } = require('./handler'); + +app.listen(3000, () => { + console.info(`Listening on port 3000.`); +}); diff --git a/aws-node-heroku-postgres/package-lock.json b/aws-node-heroku-postgres/package-lock.json new file mode 100644 index 000000000..e0b7dc613 --- /dev/null +++ b/aws-node-heroku-postgres/package-lock.json @@ -0,0 +1,546 @@ +{ + "name": "my-service", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "accepts": { + "version": "1.3.5", + "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz", + "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=", + "requires": { + "mime-types": "~2.1.18", + "negotiator": "0.6.1" + } + }, + "array-flatten": { + "version": "1.1.1", + "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz", + "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=" + }, + "axios": { + "version": "0.18.0", + "resolved": "https://registry.npmjs.org/axios/-/axios-0.18.0.tgz", + "integrity": "sha1-MtU+SFHv3AoRmTts0AB4nXDAUQI=", + 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new file mode 100644 index 000000000..2ed02622c --- /dev/null +++ b/aws-node-heroku-postgres/package.json @@ -0,0 +1,18 @@ +{ + "name": "aws-lambda-and-heroku-postgres", + "version": "1.0.0", + "description": "Shows how to connect AWS Lambda to Heroku Postgres. Uses an api:release Heroku webhook and the Heroku API to handle automatic Heroku Postgres credential rotation.", + "main": "handler.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "author": "", + "license": "ISC", + "dependencies": { + "axios": "^0.18.0", + "express": "^4.16.4", + "pg": "^7.7.1", + "pg-connection-string": "^2.0.0", + "serverless-http": "^1.8.0" + } +} diff --git a/aws-node-heroku-postgres/serverless.yml b/aws-node-heroku-postgres/serverless.yml new file mode 100644 index 000000000..e0e8e947f --- /dev/null +++ b/aws-node-heroku-postgres/serverless.yml @@ -0,0 +1,13 @@ +service: aws-lambda-and-heroku-postgres # NOTE: update this with your service name + +provider: + name: aws + runtime: nodejs8.10 + stage: dev + +functions: + hello: + handler: handler.hello + events: + - http: GET hello + - http: POST onrelease \ No newline at end of file