-# Arvados REQUIRES valid SSL to work correctly. Otherwise, some components will fail
-# to communicate and can silently drop traffic. You can try to use the Letsencrypt
-# salt formula (https://github.com/saltstack-formulas/letsencrypt-formula) to try to
-# automatically obtain and install SSL certificates for your instances or set this
-# variable to "no", provide and upload your own certificates to the instances and
-# modify the 'nginx_*' salt pillars accordingly (see CUSTOM_CERTS_DIR below)
-USE_LETSENCRYPT="yes"
-USE_LETSENCRYPT_IAM_USER="yes"
+# Arvados requires SSL certificates to work correctly. This installer supports these options:
+# * self-signed: let the installer create self-signed certificate(s)
+# * bring-your-own: supply your own certificate(s) in the `certs` directory
+# * lets-encrypt: automatically obtain and install SSL certificates for your hostname(s)
+#
+# See https://doc.arvados.org/intall/salt-multi-host.html for more information.
+SSL_MODE="lets-encrypt"
+USE_LETSENCRYPT_ROUTE53="yes"