diff --git a/README.md b/README.md index 0726e9e..c17d2cf 100644 --- a/README.md +++ b/README.md @@ -18,7 +18,7 @@ Table of Contents: - [Examples](#examples) - [🚀 Functions](#-functions) - [📦 Containers](#-containers) - - [⚙️ Jobs](#-jobs) + - [⚙️ Jobs](#️-jobs) - [💬 Messaging and Queueing](#-messaging-and-queueing) - [💜 Projects](#-projects) - [Contributing](#contributing) @@ -41,6 +41,7 @@ Table of Contents: | **[Go MultiPart Upload to S3](functions/go-upload-file-s3-multipart)**
A function to upload file from form-data to S3. | go120 | [Serverless Framework] | | **[Image Transform](functions/image-transform-node/README.md)**
A function that resizes images from an S3 bucket. | node22 | [Serverless Framework] | | **[Image Transform with triggers](functions/trigger-image-transform-node/README.md)**
A function that resizes images from an S3 bucket and use SQS triggers to smooth traffic. | node20 | [Serverless Framework] | +| **[Node Terraform](functions/node-terraform/README.md)**
A simple example of deploying a Node Serverless function using Terraform. | node22 | [Terraform] | | **[Node MultiPart Upload to S3](functions/node-upload-file-s3-multipart/README.md)**
A function to upload file from form-data to S3. | node19 | [Serverless Framework] | | **[PHP write to S3](functions/php-s3/README.md)**
A PHP function that connects to, and writes to an S3 bucket. | php82 | [Terraform] | | **[PostgeSQL Node](functions/postgre-sql-node/README.md)**
A Node function to connect and interact with PostgreSQL database. | node18 | [Serverless Framework] | diff --git a/functions/node-terraform/.gitignore b/functions/node-terraform/.gitignore new file mode 100644 index 0000000..08999b6 --- /dev/null +++ b/functions/node-terraform/.gitignore @@ -0,0 +1,2 @@ +# Artifacts +files/ diff --git a/functions/node-terraform/README.md b/functions/node-terraform/README.md new file mode 100644 index 0000000..50553c8 --- /dev/null +++ b/functions/node-terraform/README.md @@ -0,0 +1,40 @@ +# Node Terraform + +An example deploying a Node Serverless function using Terraform. The function is a simple `rss` feed that filters the content of a source feed and returns the filtered content. + +## Requirements + +- [Node.js](https://nodejs.org/en/download/) +- [Terraform](https://learn.hashicorp.com/terraform/getting-started/install.html) +- A configured Scaleway Profile. You can find more information [here](https://www.scaleway.com/en/docs/developer-tools/terraform/reference-content/scaleway-configuration-file/#how-to-set-up-the-configuration-file) + +## Usage + +Run the function locally: + +```bash +cd function +npm install --include=dev +npm start +``` + +In another terminal, you can the following command to test the function: + +```bash +curl http://localhost:8081 +``` + +Deploy the function using Terraform: + +```bash +terraform init +terraform apply +``` + +The function is a `rss` feed that can be accessed via a RSS reader. The URL of the feed is displayed in the output of the Terraform apply command. + +## Cleanup + +```bash +terraform destroy +``` diff --git a/functions/node-terraform/function/index.js b/functions/node-terraform/function/index.js new file mode 100644 index 0000000..6c87c85 --- /dev/null +++ b/functions/node-terraform/function/index.js @@ -0,0 +1,63 @@ +import Parser from "rss-parser"; +import RSS from "rss"; + +const parser = new Parser({ + headers: { "User-Agent": "Scaleway Serverless Examples" }, +}); +const SOURCE_FEED_URL = process.env.SOURCE_FEED_URL || "https://lobste.rs/rss"; +const WORTHWHILE_TOPICS = process.env.WORTHWHILE_TOPICS || + "nixos, nix, serverless, terraform"; + +const feed = new RSS({ + title: `Worthwhile items from ${SOURCE_FEED_URL}`, + description: `All about ${WORTHWHILE_TOPICS}`, + language: "en", + ttl: "60", +}); + +// This is a simple function that given an RSS feed, +// filters out the items that contain any of the topics in the WORTHWHILE_TOPICS environment variable. +// It then exposes a RSS feed on its own, with the filtered items. +async function handler(event, _context, _cb) { + const userAgent = event.headers["User-Agent"]; + const ip = event.headers["X-Forwarded-For"].split(",")[0]; + console.log("Got request from %s with user agent %s", ip, userAgent); + + const topics = WORTHWHILE_TOPICS.split(",").map((t) => t.trim()); + + const sourceFeed = await parser.parseURL(SOURCE_FEED_URL); + console.log("Parsing feed: %s", feed.title); + + const worthwhileItems = sourceFeed.items.filter((item) => { + // Filter out items that don't contain any of the topics + return topics.some((topic) => item.title.toLowerCase().includes(topic)); + }); + + console.log("Found %d worthwhile items", worthwhileItems.length); + + worthwhileItems.forEach((item) => { + // Shamelessly repost the items + feed.item({ + title: item.title, + description: item.content, + url: item.link, + date: item.pubDate, + }); + }); + + return { + statusCode: 200, + 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"name": "node-terraform", + "version": "1.0.0", + "description": "Node Serverless Function deployed using Scaleway's Terraform Provider", + "main": "index.js", + "scripts": { + "start": "NODE_ENV=development node index.js" + }, + "author": "", + "license": "ISC", + "type": "module", + "dependencies": { + "rss": "^1.2.2", + "rss-parser": "^3.13.0" + }, + "devDependencies": { + "@scaleway/serverless-functions": "^1.1.2" + } +} diff --git a/functions/node-terraform/main.tf b/functions/node-terraform/main.tf new file mode 100644 index 0000000..8803723 --- /dev/null +++ b/functions/node-terraform/main.tf @@ -0,0 +1,52 @@ +locals { + project_name = "node-terraform-rss" + description = "A simple RSS feed reader that filters on selected topics." +} + +resource "scaleway_function_namespace" "main" { + name = local.project_name + description = local.description +} + +resource "null_resource" "npm_install" { + triggers = { + always_run = timestamp() + } + + provisioner "local-exec" { + command = "npm install --prefix ${path.module}/function" + } +} + +data "archive_file" "source_zip" { + type = "zip" + source_dir = "${path.module}/function" + output_path = "${path.module}/files/function.zip" + + depends_on = [null_resource.npm_install] +} + +resource "scaleway_function" "main" { + namespace_id = scaleway_function_namespace.main.id + + name = local.project_name + description = local.description + + runtime = "node22" + handler = "index.handler" + privacy = "public" + + zip_file = data.archive_file.source_zip.output_path + zip_hash = filesha256(data.archive_file.source_zip.output_path) + + environment_variables = { + "SOURCE_FEED_URL" = "https://lobste.rs/rss" + "WORTHWHILE_TOPICS" = "nixos, nix, serverless, terraform, gleam" + } + + deploy = true +} + +output "function_url" { + value = "https://${scaleway_function.main.domain_name}" +} diff --git a/functions/node-terraform/provider.tf b/functions/node-terraform/provider.tf new file mode 100644 index 0000000..2ce950a --- /dev/null +++ b/functions/node-terraform/provider.tf @@ -0,0 +1,9 @@ +terraform { + required_providers { + scaleway = { + source = "scaleway/scaleway" + version = "~> 2.46" + } + } + required_version = ">= 0.13" +}