ChristianLempa_Boilerplates/library/compose/bind9/config/tsig.key.j2

// TSIG Key for Secure Zone Transfers
// Auto-generated base64-encoded secret for secure zone transfers and dynamic DNS updates
// Algorithm: hmac-sha256

key "{{ tsig_key_name }}" {
    algorithm hmac-sha256;
    secret "{{ tsig_key_secret }}";
};

// To manually generate a new key:
// docker exec bind9 tsig-keygen -a hmac-sha256 {{ tsig_key_name }}
//
// Then update the secret value above with the generated secret