From 2f71008ea4a69189dbac0d7e93f8d3d782e5f325 Mon Sep 17 00:00:00 2001
From: propheth <navyn@prophetiq.com>
Date: Thu, 25 Feb 2021 11:59:58 -0500
Subject: [PATCH] Add support for virtual host redirection

---
 nginx.tmpl | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/nginx.tmpl b/nginx.tmpl
index 07e2b50..012d747 100644
--- a/nginx.tmpl
+++ b/nginx.tmpl
@@ -225,6 +225,8 @@ upstream {{ $upstream_name }} {
 {{/* Get the VIRTUAL_ROOT By containers w/ use fastcgi root */}}
 {{ $vhost_root := or (first (groupByKeys $containers "Env.VIRTUAL_ROOT")) "/var/www/public" }}
 
+{{/* Get the first redirect defined by containers w/ the same vhost */}}
+{{ $redirectHost := or (first (groupByKeys $containers "Env.REDIRECT")) ""}}
 
 {{/* Get the first cert name defined by containers w/ the same vhost */}}
 {{ $certName := (first (groupByKeys $containers "Env.CERT_NAME")) }}
@@ -260,10 +262,20 @@ server {
 		try_files $uri =404;
 		break;
 	}
-	
+
+	{{ if (and $redirectHost (ne $redirectHost $host)) }}
+        # Redirect host {{ $host }} => {{ $redirectHost }}
+        {{ end }}
+
+	{{ if (and $redirectHost (ne $redirectHost $host)) }}
+	location / {
+                return 301 https://{{ $redirectHost }}$request_uri;
+        }
+	{{ else }}
 	location / {
 		return 301 https://$host$request_uri;
 	}
+	{{ end }}
 }
 {{ end }}
 
@@ -308,7 +320,12 @@ server {
 	{{ else if (exists "/etc/nginx/vhost.d/default") }}
 	include /etc/nginx/vhost.d/default;
 	{{ end }}
+	
+	{{ if (and $redirectHost (ne $redirectHost $host)) }}
+        # Redirect host {{ $host }} => {{ $redirectHost }}
+        {{ end }}
 
+	{{ if (or (not $redirectHost) (eq $redirectHost $host)) }}
 	location / {
 		{{ if eq $proto "uwsgi" }}
 		include uwsgi_params;
@@ -333,6 +350,13 @@ server {
 		include /etc/nginx/vhost.d/default_location;
 		{{ end }}
 	}
+	{{ end }}
+
+	{{ if (and $redirectHost (ne $redirectHost $host)) }}
+        location / {
+                return 301 https://{{$redirectHost}}$request_uri;
+        }
+        {{ end }}
 }
 
 {{ end }}
@@ -357,7 +381,12 @@ server {
 	{{ else if (exists "/etc/nginx/vhost.d/default") }}
 	include /etc/nginx/vhost.d/default;
 	{{ end }}
+	
+	{{ if (and $redirectHost (ne $redirectHost $host)) }}
+        # Redirect host {{ $host }} => {{ $redirectHost }}
+        {{ end }}
 
+	{{ if (or (not $redirectHost) (eq $redirectHost $host)) }}
 	location / {
 		{{ if eq $proto "uwsgi" }}
 		include uwsgi_params;
@@ -381,6 +410,13 @@ server {
 		include /etc/nginx/vhost.d/default_location;
 		{{ end }}
 	}
+	{{ end }}
+
+	{{ if (and $redirectHost (ne $redirectHost $host)) }}
+	location / {
+                return 301 http://{{ $redirectHost }}$request_uri;
+        }
+	{{ end }}	
 }
 
 {{ if (and (not $is_https) (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}