@ansaro/lambda-pg

lambda-pg

Connect to Postgres in AWS Lambda environment

yarn add @ansaro/lambda-pg

Usage

Create a pool connection that can be resused across Lambda invocations. You can configure Postgres in 4 ways:

1. environment variables
2. connection URI
3. config object
4. AWS Secrets Manager

Environment Variables

const DB = require("@ansaro/lambda-pg");

const db = new DB();

exports.handle = async function() {
  const pool = await db.init();

  const res = await pool.query("SELECT 1");

  return res;
};

Connection URI

const DB = require("@ansaro/lambda-pg");

const db = new DB();

exports.handle = async function() {
  const pool = await db.init("postgresql://dbuser:[e-mail]:3211/mydb");

  const res = await pool.query("SELECT 1");

  return res;
};

Config Object

const DB = require("@ansaro/lambda-pg");

const db = new DB();

exports.handle = async function() {
  const pool = await db.init({
    user: "dbuser",
    host: "database.server.com",
    database: "mydb",
    password: "secretpassword",
    port: 3211
  });

  const res = await pool.query("SELECT 1");

  return res;
};

AWS Secrets Manager

• name (string) identifier for AWS Secret Manager
• transformer (function) transforms secret into config object

const DB = require("@ansaro/lambda-pg");

function transformer({ username, host, dbname, password, port }) {
  return {
    user: username,
    host,
    database: dbname,
    password,
    port
  };
}

const db = new DB();

exports.handle = async function() {
  const pool = await db.init({
    name: "your/db/secret",
    transformer
  });

  const res = await pool.query("SELECT 1");

  return res;
};