Introduction

SAP Cloud Platform is an open platform as a service that provides a unique in-memory database and application services. In this guide, you'll learn how to use the Go programming language to develop cloud-native applications and deploy them on SAP Cloud Platform. We'll cover setting up your development environment, creating a Go application, containerizing it, deploying it on SAP Cloud Platform, and provide sample code and detailed steps.


Prerequisites

Before getting started, make sure you have GoLang installed, an SAP Cloud Platform account, and the SAP Cloud Platform CLI installed on your system. Docker is essential for containerization, and familiarity with GoLang and basic web application development will be beneficial.


Setting Up Your Development Environment

To begin building and deploying Go applications on SAP Cloud Platform, follow these steps to set up your development environment:

  1. Install Go: If you haven't already, download and install Go from the official website.
  2. Create an SAP Cloud Platform Account: Sign up for an SAP Cloud Platform account or use an existing one.
  3. Install SAP Cloud Platform CLI: Install the SAP Cloud Platform Command Line Interface (CLI) to interact with SAP Cloud Platform services.
  4. Install Docker: Install Docker on your local machine to containerize your applications.

Creating a Go Application

Develop your Go application as per your requirements. Ensure it's a web server that listens to the correct port and responds to HTTP requests. Here's a simple example of a Go web server:

                            package main
                import (
                    "fmt"
                    "net/http"
                )
                func main() {
                    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
                        fmt.Fprint(w, "Hello, SAP Cloud Platform!")
                    })
                    http.ListenAndServe(":8080", nil)
                }

Containerizing Your Application

To deploy your Go application on SAP Cloud Platform, you need to containerize it using Docker. Create a Dockerfile for your application like the one below:

                            # Use the official Golang image
                FROM golang:1.16
                # Set the working directory
                WORKDIR /app
                # Copy the local code to the container
                COPY . .
                # Build the Go application
                RUN go build -o main
                # Expose port 8080
                EXPOSE 8080
                # Command to run the executable
                CMD ["./main"]

Deploying on SAP Cloud Platform

Deploying your Go application on SAP Cloud Platform involves creating a Docker image, pushing it to a container registry, defining SAP Cloud Platform configurations, and launching your application in a containerized environment. Here are the general steps:

  1. Build the Docker Image: Use 'docker build' to build the Docker image for your application.
  2. Push to a Container Registry: Push the Docker image to a container registry compatible with SAP Cloud Platform, such as SAP Cloud Platform Container Registry.
  3. Define SAP Cloud Platform Configurations: Create SAP Cloud Platform configurations for deploying your application, such as Cloud Foundry or Kyma.
  4. Launch in a Containerized Environment: Launch your application on SAP Cloud Platform using your defined configurations.

Sample Code

Here's a sample Go web server code and a simple Dockerfile for containerization. You can adapt this code to your application's requirements.

                            package main
                import (
                    "fmt"
                    "net/http"
                )
                func main() {
                    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
                        fmt.Fprint(w, "Hello, SAP Cloud Platform!")
                    })
                    http.ListenAndServe(":8080", nil)
                }

Dockerfile:

                            # Use the official Golang image
                FROM golang:1.16
                # Set the working directory
                WORKDIR /app
                # Copy the local code to the container
                COPY . .
                # Build the Go application
                RUN go build -o main
                # Expose port 8080
                EXPOSE 8080
                # Command to run the executable
                CMD ["./main"]

Conclusion

Using the Go programming language to develop and deploy cloud-native applications on SAP Cloud Platform offers powerful in-memory database and application services. This guide covered setting up your development environment, creating a Go application, containerizing it, and deploying it on SAP Cloud Platform. With this knowledge, you can effectively develop and deploy cloud-native applications using Go on SAP Cloud Platform.


Further Resources

To further explore GoLang development on SAP Cloud Platform, consider the following resources: