Sealing keys in bitnami-labs/sealed-secrets

key example key.txt

  -----BEGIN PRIVATE KEY-----
  ... key content
  -----END PRIVATE KEY-----

encode key

  base64 -w 0 key.txt > encoded.key.txt

copy content of encoded.key.txt to you yaml open secret file variable ie. PRIVATE_KEY
seal it
deploy

in Python to get exact the same string with key use

  import base64
  import os
    
  key = base64.b64decode(os.getenv("PRIVATE_KEY")).decode("utf-8)