Gluttony-Cluster/docs/technical/sealed-secrets.md

Sealed Secrets

Add the normal helm release for sealed secrets. Place into its own namespace.

Adding an Existing Certificate

Extracting certs

Store secrets in a json format, something of the form,

{
  "tls.crt": "ABC123...",
  "tls.key": "XYZ987..."
}

Both values will be base64 encoded. Something to this effect will get what you want.

pass my-secret-key | jq -r '.[tls.crt]' | base64 -d | base64 -d | tee pub-cert.pem
pass my-secret-key | jq -r '.[tls.key]' | base64 -d | base64 -d | tee private-key.pem

You will know it worked if the outputted keys from tee contain the normal headers.

Apply cert into cluster

To apply the cert into the cluster, just make the secret

kubectl create secret tls sealed-secrets-key \
  --cert=pub-cert.pem \
  --key=private-key.pem \
  --namespace=sealed-secrets

After that just restart the sealed-secrets pod to make sure it takes up the changes.

kubectl rollout restart deployment sealed-secrets -n sealed-secrets

Check the logs of the sealed-secrets pod after restart, and you should see sealed-secrets-key registered as a private key in the logs. And thats it!

Explanation of Certificate Rotation

So by default sealed secrets is going to make a tls cert in the sealed-secrets namespace. Its gonna be something like sealed-secrets-key<nonce>. It will generate one every 30 days (configurable value).

All secrets are valid for decrypting secrets in the git repo. If you want it to decrypt older stuff, add the older cert as outlined above.