authorized_keys file got empty for instances behind bastillion server

[akanksha-singh-robomq]

I have instances behind the Bastillion server, and lately, we have been experiencing frequent issues of 'permission denied' when trying to SSH into those instances using SSH keys created through the Bastillion account.

Reason: After investigating, I found that the 'authorized_keys' file of the instances is getting emptied, which prevents us from SSHing into the systems.

Exploration: I have explored Bastillion's SSH key management, and it appears that it overrides the 'authorized_keys' file every time a key is added or removed.

I am currently facing difficulties in replicating the issue. I want to understand what exactly happens behind the scenes when the 'authorized_keys' file gets emptied. I need help in replicating the issue.

So far, I have attempted the following methods, but none of them have worked:

1. Created keys frequently from different users.
2. Deleted keys from different users.
3. Deleted keys directly from the 'authorized_keys' file.