Merge pull request nginx-proxy#480 from jwilder/jw-certs

Fix template error when /etc/nginx/certs does not exist

Author: jwilder

Procfile

@@ -1,2 +1,2 @@
 nginx: nginx
-dockergen: docker-gen -watch -only-exposed -notify "nginx -s reload" /app/nginx.tmpl /etc/nginx/conf.d/default.conf
+dockergen: docker-gen -watch -notify "nginx -s reload" /app/nginx.tmpl /etc/nginx/conf.d/default.conf

README.md

@@ -19,6 +19,32 @@ The containers being proxied must [expose](https://docs.docker.com/reference/run
 
 Provided your DNS is setup to forward foo.bar.com to the a host running nginx-proxy, the request will be routed to a container with the VIRTUAL_HOST env var set.
 
+### Docker Compose
+
+```yaml
+version: '2'
+services:
+  nginx-proxy:
+    image: jwilder/nginx-proxy
+    container_name: nginx-proxy
+    ports:
+      - "80:80"
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+
+  whoami:
+    image: jwilder/whoami
+    container_name: whoami
+    environment:
+      - VIRTUAL_HOST=whoami.local
+```
+
+```shell
+$ docker-compose up
+$ curl -H "Host: whoami.local" localhost
+I''m 5b129ab83266
+```
+
 ### Multiple Ports
 
 If your container exposes multiple ports, nginx-proxy will default to the service running on port 80.  If you need to specify a different port, you can set a VIRTUAL_PORT env var to select a different one.  If your container only exposes one port and it has a VIRTUAL_HOST env var set, that port will be selected.

docker-compose.yml

@@ -0,0 +1,15 @@
+version: '2'
+services:
+  nginx-proxy:
+    image: jwilder/nginx-proxy
+    container_name: nginx-proxy
+    ports:
+      - "80:80"
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+
+  whoami:
+    image: jwilder/whoami
+    environment:
+      - VIRTUAL_HOST=whoami.local
+

nginx.tmpl

@@ -112,11 +112,13 @@ upstream {{ $host }} {
 {{ $certName := (first (groupByKeys $containers "Env.CERT_NAME")) }}
 
 {{/* Get the best matching cert  by name for the vhost. */}}
+{{ $vhostCert := "" }}
+{{ if exists "/etc/nginx/certs" }}
 {{ $vhostCert := (closest (dir "/etc/nginx/certs") (printf "%s.crt" $host))}}
-
-{{/* vhostCert is actually a filename so remove any suffixes since they are added later */}}
-{{ $vhostCert := replace $vhostCert ".crt" "" -1 }}
-{{ $vhostCert := replace $vhostCert ".key" "" -1 }}
+	{{/* vhostCert is actually a filename so remove any suffixes since they are added later */}}
+	{{ $vhostCert := replace $vhostCert ".crt" "" -1 }}
+	{{ $vhostCert := replace $vhostCert ".key" "" -1 }}
+{{ end }}
 
 {{/* Use the cert specifid on the container or fallback to the best vhost match */}}
 {{ $cert := (coalesce $certName $vhostCert) }}