How do you manage the distribution of internal TLS network certificates? I’m using cert-manager to generate them, but the root self-signed certificate expires monthly which makes distribution to devices outside of K8s a challenge. It’s a PITA to keep doing this for the tablet, laptop and phones. I can bump the root cert to a year, but I’m concerned that the date will sneak up on me. Are there any automated solutions?
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Not sure if it’d fit your use case 100%, but this has been a nice middle ground solution for LE certs in my lab: https://www.certwarden.com/
Use a secret manager?
Cert is a secret, add a small agent to your containers that pings your secret manager and gets back the current cert. Then saves / imports it (or whatever is appropriate).
For most of my internal services that are sitting behind Traefik I use step-ca which basically gives you a Let’s Encrypt style certificate while working over the local network. The root CA has a long expiry (so might not be what you want if your goal Is a short lived root CA) but the actual certificates for each service are short lived (a touch over 24 hours from memory?)