…because who wouldn’t want a Serverless GraphQL server, right !? If you have mucked around with , Serverless and love — you’ve come to the right place. What’s better than mixing a few of the most exciting technologies in recent times, not much, eh. GraphQL JavaScript Continuing in our journey, and further building on a previous post, where we’ve explored let’s now turn our focus towards GraphQL and marry it with Serverless. And, in doing so, eliminate the need to have a continuously running GraphQL instance, an ops dream. Serverless Rendering and serving a Create-React-App from an Express server running within a Lambda function — We will be using functions along with the for our server. Our Lambdas will run the Node.JS 8.1 runtime. We will also make use of for all it’s bundling goodness and to transpile our pile. AWS Lambda Serverless Framework Webpack Babel In order to get our Serverless GraphQL server up and running we will need to: Setup a Serverless Create and Express App Pull in and configure Apollo Server Right, let’s get started! Serverless + Webpack First thing’s first, install the Serverless framework and all the necessary dependencies it’ll need: $ npm i -S serverless serverless-webpack serverless-http serverless-offline We will also need to install Webpack, node-externals packages, and babel-loader. Next create a config file for Webpack: $ npm i -D webpack webpack-node-externals babel-loader$ touch webpack.config.js and place the following, basic config in it: // webpack.config.js const path = require("path");const slsw = require("serverless-webpack");const nodeExternals = require("webpack-node-externals"); module.exports = {entry: slsw.lib.entries,target: "node",mode: slsw.lib.webpack.isLocal ? "development" : "production",optimization: {minimize: false},performance: {hints: false},devtool: "nosources-source-map",externals: [nodeExternals()],module: {rules: [{test: /\.js$/,exclude: /node_modules/,use: [{loader: "babel-loader"}]}]},output: {libraryTarget: "commonjs2",path: path.join(__dirname, ".webpack"),filename: "[name].js",sourceMapFilename: "[file].map"}}; You can find more information about the serverless-webpack plugin . here Next we’re going to need to create and configure our file: serverless.yml $ touch serverless.yml Place the following YML in it: // serverless.yml service: serverless-graphql plugins: serverless-webpack serverless-offline custom:webpack:webpackConfig: ./webpack.config.jsincludeModules: true provider:name: awsruntime: nodejs8.10stage: devregion: eu-west-1 We will add and configure our functions next. Express + Apollo Server Right, let’s move on to our server. We will need to install Express, Apollo Server and a few other dependencies: $ npm i -S express apollo-server-express graphql We’re also going to use the to test our fancy server. Let’s install the necessary packages: Prisma GraphQL playground $ npm i -D graphql-playground-middleware-express Create an file which will contain our server code as well as be our entry point: index.js $ touch index.js Place the following code in it: // index.js import express from "express";import serverless from "serverless-http";import graphiql from "graphql-playground-middleware-express";import { ApolloServer, gql } from "apollo-server-express"; const typeDefs = gql`type Query {hello: String}`; const resolvers = {Query: {hello: () => "world"}}; const app = express(); const server = new ApolloServer({typeDefs,resolvers,path: "/graphql"}); server.applyMiddleware({ app }); app.get("/playground", graphiql({ endpoint: "/graphql" })); const handler = serverless(app); export { handler }; Right, our has been setup to accommodate two lambda functions, one for the GraphQL Apollo Server and the other for the Playground. Update the file and add the two functions we need: index.js serverless.yml // serverless.yml functions:graphql:handler: index.handlerevents:- http:path: graphqlmethod: postcors: trueplayground:handler: index.handlerevents:- http:path: playgroundmethod: get …and with that, we’ve pretty much concluded the setup. Let’s give our GraphQL Apollo Server a test! Recall, earlier, we added as a dependency, let’s go ahead and startup our server offline: serverless-offline $ npx sls offline start This will start a local instance of our server. You should see the following output: Running our GraphQL server for the first time! You’ll notice that our two endpoints will be created, being our GraphQL server endpoint and our playground at .To test our server, let’s navigate to our playground, /graphql /playground http://localhost:3000/playground Execute a simple query, and behold the magic of a Serverless GraphQL server…😎 Our Serverless GraphQL server in all it’s glory 😎 — Finally In a few simple steps, we’ve created a simple Express and GraphQL server on AWS Lambda. To deploy our server, all we need to do now, is run: $ npx sls deploy -v Hook up your server to your too and you’ve got yourself quite a flexible Serverless solution. This concludes our little attempt at marrying Serverless and GraphQL — two of the hottest technologies in the scene right now. React frontend, server-side rendered from a Lambda You can find the code for this post at: https://github.com/FBI23/serverless-express-graphql

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Create a Serverless GraphQL server using Express, Apollo Server and AWS Lambda

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Create a Serverless GraphQL server using Express, Apollo Server and AWS Lambda

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Yatin badal

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