diff --git a/container/start_service.sh b/container/start_service.sh
index 224b192..27100ec 100755
--- a/container/start_service.sh
+++ b/container/start_service.sh
@@ -13,11 +13,14 @@ if [[ "${!KOLLA_BOOTSTRAP[*]}" ]]; then
     exit 0
 fi
 
+GENERATOR_ARGS="--output-file /etc/nginx/nginx.conf"
 if [[ -n "${LISTEN_ADDRESS}" ]]; then
-    skyline-nginx-generator -o /etc/nginx/nginx.conf --listen-address "${LISTEN_ADDRESS}"
-else
-    skyline-nginx-generator -o /etc/nginx/nginx.conf
+    GENERATOR_ARGS+=" --listen-address ${LISTEN_ADDRESS}"
 fi
+if [[ -n "${SSL_CERTFILE}" ]] && [[ -n "${SSL_KEYFILE}" ]]; then
+    GENERATOR_ARGS+=" --ssl-certfile ${SSL_CERTFILE} --ssl-keyfile ${SSL_KEYFILE}"
+fi
+skyline-nginx-generator ${GENERATOR_ARGS}
 
 nginx
 
diff --git a/releasenotes/notes/support-http-as-default-5b723ad51c0995fa.yaml b/releasenotes/notes/support-http-as-default-5b723ad51c0995fa.yaml
new file mode 100644
index 0000000..a66ca50
--- /dev/null
+++ b/releasenotes/notes/support-http-as-default-5b723ad51c0995fa.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The nginx.conf.j2 support both http and https. By default, if we
+    do not supply the ssl_certfile and ssl_keyfile, nginx will use http.
diff --git a/skyline_apiserver/templates/nginx.conf.j2 b/skyline_apiserver/templates/nginx.conf.j2
index 11f0bbc..ed7e3e5 100644
--- a/skyline_apiserver/templates/nginx.conf.j2
+++ b/skyline_apiserver/templates/nginx.conf.j2
@@ -25,7 +25,7 @@ http {
 
     include /etc/nginx/mime.types;
     default_type application/octet-stream;
-
+    {% if ssl_certfile and ssl_keyfile %}
     ##
     # SSL Settings
     ##
@@ -34,9 +34,9 @@ http {
 
     # Self signed certs generated by the ssl-cert package
     # Don't use them in a production server!
-    ssl_certificate {{ ssl_certfile | default('/etc/ssl/certs/ssl-cert-snakeoil.pem') }};
-    ssl_certificate_key {{ ssl_keyfile | default('/etc/ssl/private/ssl-cert-snakeoil.key') }};
-
+    ssl_certificate {{ ssl_certfile }};
+    ssl_certificate_key {{ ssl_keyfile }};
+    {% endif %}
     ##
     # Logging Settings
     ##
@@ -69,7 +69,7 @@ http {
     # Virtual Host Configs
     ##
     server {
-        listen {{ listen_address | default('0.0.0.0:9999') }} ssl http2 default_server;
+        listen {{ listen_address | default('0.0.0.0:9999') }}{% if ssl_certfile and ssl_keyfile %} ssl http2{% endif %} default_server;
 
         root {{ skyline_console_static_path }};