Installing OpenFaaS on Arch Linux

OpenFaaS is a platform for building and deploying serverless functions. It provides a user-friendly interface for developing and deploying functions, managing the infrastructure required to run them, and scaling them to meet demand. In this tutorial, we will show you how to install OpenFaaS on Arch Linux.

Prerequisites

Before installing OpenFaaS on Arch Linux, you need to make sure that:

• You have root access to your machine
• Docker is installed on your system.
• You have curl installed on your system.

Step 1: Install faas-cli

OpenFaaS provides a command-line interface tool called faas-cli, which is used to deploy and manage serverless functions. To install the CLI, execute the following command in the terminal:

$ curl -sL https://cli.openfaas.com | sudo sh

Step 2: Install the OpenFaaS Gateway

The OpenFaaS Gateway is the point of entry for all incoming requests to your serverless functions. To deploy the gateway, run the following command:

$ docker run -d --name gateway -p 8080:8080 -e "basic_auth=true" -e "secret_mount_path=/run/secrets" -v ~/.openfaas/secrets:/run/secrets  openfaas/gateway:latest

This command will create a container named gateway, expose the port 8080 for incoming requests, set up basic authentication, and make sure that secrets are available for functions.

Step 3: Deploy a Function

Now that the gateway is up and running, you can deploy your first function using faas-cli. OpenFaaS provides several templates to choose from when creating a new function. For this tutorial, we will use the Node.js template.

$ faas-cli new --lang node hello-node

This command will create a new function named hello-node using the Node.js template. The function code will be generated in the hello-node directory.

Now, you can deploy the function using the following command:

$ faas-cli up -f hello-node.yml

This command will use the configuration file hello-node.yml to deploy the function. The configuration file contains information about the function, such as its name, the image to use, and any environment variables.

You can now test the function by invoking it using curl:

$ curl http://localhost:8080/function/hello-node

This command will send a HTTP GET request to the OpenFaaS gateway, which will then forward it to your function. The function will return a "Hello, world!" message.

Congratulations! You have successfully installed OpenFaaS on Arch Linux and deployed your first serverless function.

Conclusion

In this tutorial, we showed you how to install OpenFaaS on Arch Linux and deploy a serverless function. OpenFaaS is a powerful platform for building and deploying serverless functions, and we hope that this tutorial has given you a good starting point.