Sounds useful. We do similar things with encrypted properties files. Also, things like Ansible come with ansible vault. If you use Github, you can use Github secrets of course. And AWS/GCP/etc. tend to have secret stores.
The challenge with this solution is of course managing who has access and dealing with people leaving your team and no longer being trusted. Even if you still like them personally, just because they are outside your team would require you to change any credentials they might have.
In our case, our team is small and I simply ignore this problem. So, we have a keepass file with shared secrets and repositories with encrypted properties files and a master password in this keepass file. Mostly, it's just me handling the password. It also gets configured as a Github secret on repositories for CI and deployment jobs. It works. But I'm aware of the limitations.
This is an area where there are lots of tools but not a whole lot of standardized ones or good practices for using them. It's one of those things that acts as a magnet for enterprise complexity. Tools like this tend to become very unwieldy because of this. Which is why people keep reinventing them.
The challenge with this solution is of course managing who has access and dealing with people leaving your team and no longer being trusted. Even if you still like them personally, just because they are outside your team would require you to change any credentials they might have.
In our case, our team is small and I simply ignore this problem. So, we have a keepass file with shared secrets and repositories with encrypted properties files and a master password in this keepass file. Mostly, it's just me handling the password. It also gets configured as a Github secret on repositories for CI and deployment jobs. It works. But I'm aware of the limitations.
This is an area where there are lots of tools but not a whole lot of standardized ones or good practices for using them. It's one of those things that acts as a magnet for enterprise complexity. Tools like this tend to become very unwieldy because of this. Which is why people keep reinventing them.