Elastic Beanstalk Procfile for go

Question

I'm trying to deploy my go restful server program to EC2 Linux using Elastic Beanstalk. The document says that I need to create a Procfile at the root. So I did. Here are the steps:

1. Build my go program myapp.go to using

   $ go build -o myapp -i myapp.go
   

2. Create a Procfile with exact name at the root with

   web: myapp
   

3. Zip up the Procfile and the myapp image to a myapp.zip file.

Upload to the server via Elastic Beanstalk console. But I keep getting Degraded health and warning with

WARN Process termination taking longer than 10 seconds.

Any suggestions. By the way, I tried to use the same procfile procedure on the simple application.go zip file came from the Elastic Beanstalk example library. It didn't work either.

Answer 1

I was finally able to get a Go application to deploy with Elastic Beanstalk using the eb client. There are a few things that EB requires:

1. The name of your main file should be application.go.
2. Make sure your app is listening on port 5000.

3. You'll need a Procfile in the main root with

   web: bin/application
   

4. You'll need a Buildfile with

   make: ./build.sh
   

5. And finally you'll need a build.sh file with

   #!/usr/bin/env bash
   # Stops the process if something fails
   set -xe
   
   # All of the dependencies needed/fetched for your project. 
   # FOR EXAMPLE:
   go get "github.com/gin-gonic/gin"
   
   # create the application binary that eb uses
   GOOS=linux GOARCH=amd64 go build -o bin/application -ldflags="-s -w"
   

Then if you run eb deploy (after creating your initial eb repository), it should work. I wrote a whole tutorial for deploying a Gin application on EB here. The section specifically on deploying with Elastic Beanstalk is here.