Don't forget shebang when writing Check! Ansible's Dynamic Inventory in python!

Hello, this is @dz_ this and Ohira Kazumi.

Prologue-Introduction

For configuration management, I prefer Ansible. This time, I wanted to specify the inventory dynamically, so when I tried Dynamic Inventory ... I got stuck in the following error for a while. I was able to deal with it, so write down the memorandum.

For Dynamic Inventory, I referred to the following documents.

• Developing Dynamic Inventory Sources — Ansible Documentation -Let's make Ansible Dynamic Inventory! --Qiita ――This is a very easy-to-understand article!

Don't forget shebang when writing Ansible's Dynamic Inventory in python!

error contents

Here is the error I encountered.

ERROR! Attempted to execute "./dynamic-inventory.py" as inventory script: problem running ./dynamic-inventory.py --list ([Errno 8] Exec format error)
Attempted to read "./dynamic-inventory.py" as ini file: ./dynamic-inventory.py:1: Expected key=value host variable assignment, got: 

"I tried to run the script, but I got an error. I also read it as an ini file, but it doesn't work."

Coping

After a lot of trial and error, I found this issue!

• Executable bash script not working · Issue #9 · ansible/ansible-inventory-backport · GitHub

That file needs a shebang line.

I see, I need a shebang line! shebang?

-Shebang (Unix)-Wikipedia

A shebang or shebang is the first line of a UNIX script that starts with # !.

I see! !!

So, referring to Python's Shebang line, if you write the following shebang in my operating environment It looks good.

#!/usr/bin/env python

When I set this, it worked smoothly! (･ Ε ･;)

Epilogue-Conclusion

Shebang didn't usually care so much, so it was an unexpected pitfall!