Access ENV variables using Lua

Questions / Help
1 
class Fly
  def self.database_url
    primary = ENV["PRIMARY_REGION"]
    current = ENV["FLY_REGION"]
    db_url = ENV["DATABASE_URL"]

How can I achieve primary = ENV[“PRIMARY_REGION”] in Lua?
Means, how can I get environment variable values in Lua programming?

2

Hi @BalajiPothula I don’t have experience with Lua, but I’d assume the os.getenv method as described in Lua - Operating System Facilities should work.

Are you running a container with a Lua codebase on it, or would this be Lua inside the context of some other system like Redis? That would make a big difference, I imagine.

3

HI @sudhir.j
Thanks for the reply.

The scenario is Developing a simple web application (with user registration form) in html (front end), get user data using Lua (POST call) which is backend or middleware logic, then persist into the PostgreSQL.

4

Then in that case the

the os.getenv method as described in Lua - Operating System Facilities should work.

method should be what you need. You’d want to use the DATABASE_URL to connect the the DB. :+1: