Finished lb and db

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/loadbalancer/templates/nginx.conf.j2

@@ -0,0 +1,16 @@
+include /etc/nginx/modules-enabled/*.conf;
+
+events {}
+
+stream {
+  upstream k3s_servers {
+    {% for ip in k3s_server_ips %}
+    server {{ ip }}:6443;
+    {% endfor %}
+  }
+
+  server {
+    listen 6443;
+    proxy_pass k3s_servers;
+  }
+}