如何访问Cloud Foundry中用户提供的环境变量？

Question

I'm aware of setting environment variables in manifest.yml by doing following

--- 
- applications:
  - name:
    .
    .
    env:
      MY_ENV_VAR: 'my-var-value'

How do I access MY_ENV_VAR in my program (python for example) ?

Additionally, I only want to access this variable in cloud foundry environment. While doing local development, I would like to use some hard-coded value, how do I separate these two scenarios (python example again) ?

Answer 1

Snippet in Python:

import os

if os.getenv('VCAP_APPLICATION'):
  # cf environment
  my_env_var = os.getenv('MY_ENV_VAR')
else:
  # local
  my_env_var = some_default_value