emqx_authn_kerberos_schema { principal { label: "Kerberos Principal" desc: """~ Server Kerberos principal. For example mqtt/emqx-cluster-1.example.com@MY_REALM.EXAMPLE.COM. NOTE: The realm in use has to be configured in /etc/krb5.conf in EMQX nodes.~""" } keytab_file { label: "Keytab File" desc: """~ Kerberos keytab file path. NOTE: This file has to be placed in EMQX nodes.~""" } }