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Lately, I've been thinking of implementing a secrets management system such as Infiscal, etc. Does anyone use this or something similar like Hashicorp?
How hard would it be to deploy on a pre-existing set up? How does that work? Do you call the required secret in your Docker compose? What makes a secret manager more secure than pulling secrets from an .env file?
Which secret manager is the most popular/better among selfhosters?
A couple of the Docker compose files I've used have non-hashed secrets in the compose itself. I am assuming, should someone penetrate the firewall, and gain access to Portainer somehow, they could see these compose entries just like I can. While I feel like I have adequately hardened the server (Lynis reports a score of 87) and I have rather robust ids/ips, firewall, and assorted accoutrements to support a secure server, there's always that 'what if' scenario running in my brain and it causes doubt. Perhaps a secrets manager is over kill for a single user, docker container server.
Yeah, at that point I wouldn't worry. If someone has docker access on the server, it's pretty much game over.