如何在Digital Ocean的云配置文件中设置系统范围的环境变量

Question

I am pretty new to setting up remote servers, but I was playing around today and was hoping that I could leverage a Cloud Config file upon setup in order to set a few environment variables as the server spins up.

How can I set my environment variables programmatically when spinning up a machine on Digital Ocean? The key is that I want to automate the setup and avoid interactively defining these variables.

Thanks in advance.

Answer 1

This is what I did with for ubuntu

write_files:
- path: /etc/environment
  content: |
    FOO="BAR"
  append: true

Answer 2

There's a couple ways to do this, although Cloud Init doesn't support a built-in resource type for environment variables.

1. Depending on your OS, use a write-files section to output the env vars you want to the appropriate file. For CoreOS, you'd do something like:

    write_files: - path: "/etc/profile.env" content: | export MY_VAR="foo"

For Ubuntu, use /etc/environment , or a user's profile, etc.

2. Another way to do it would be to leverage Cloud Init's support for Chef, and use that tool to set the variables when the profile is applied.

Answer 3

Do you need the environment variable to be permanent, or just for the execution of a single command/script? If it's for a single command, you can do that:

FOO=${BAR} | sh ./your_script.sh