init enhanced templating for the nginx config

proxy/Dockerfile

@@ -11,5 +11,6 @@ RUN echo "Building for '${OS}/${ARCH}'..." \
 COPY templates /etc/confd/templates/
 COPY conf.d /etc/confd/conf.d/
 COPY nginx-proxy /usr/bin/
+COPY test/portmap.yaml /etc/confd/values.yaml
 
 ENTRYPOINT nginx-proxy

proxy/conf.d/nginx.toml

@@ -2,7 +2,5 @@
 src = "nginx.tmpl"
 dest = "/etc/nginx/nginx.conf"
 keys = [
-    "SERVERS",
-    "PORTS",
-    "UDP_PORTS",
-]
+    "ports"
+]

proxy/nginx-proxy

@@ -1,7 +1,9 @@
 #!/bin/sh
 
 # Run confd
-confd -onetime -backend env
+set -e
+confd -onetime -backend file -file /etc/confd/values.yaml -log-level debug
+set +e
 
 # Output Configuration
 echo "===== Initial nginx configuration ====="

proxy/templates/nginx.tmpl

@@ -1,3 +1,10 @@
+###################################
+# Generated by confd {{datetime}} #
+#             #######             #
+#             # k3d #             #
+#             #######             #
+###################################
+
 {{- $servers := split (getenv "SERVERS") "," -}}
 {{- $ports := split (getenv "PORTS") "," -}}
 {{- $udp_ports := split (getenv "UDP_PORTS") "," -}}
@@ -12,42 +19,28 @@ events {
 
 stream {
 
-  #######
-  # TCP #
-  #######
-  {{- range $port := $ports }}
-  upstream server_nodes_{{ $port }} {
-    {{- range $server := $servers }}
+  {{- range $portstring := lsdir "/ports" }}
+
+
+  {{- $portdir := printf "/ports/%s/*" $portstring -}}
+  {{- $port := index (split $portstring ".") 0 -}}
+  {{- $protocol := index (split $portstring ".") 1 -}}
+  {{- $upstream := replace $portstring "." "_" -1 }}
+
+  upstream {{ $upstream }} {
+    {{- range $server := getvs $portdir }}
     server {{ $server }}:{{ $port }} max_fails=1 fail_timeout=10s;
     {{- end }}
   }
 
   server {
-    listen        {{ $port }};
-    proxy_pass    server_nodes_{{ $port }};
+    listen        {{ $port }} {{- if (eq $protocol "udp") }} udp{{- end -}};
+    proxy_pass    {{ $upstream }};
     proxy_timeout 600;
     proxy_connect_timeout 2s;
   }
+
+  
   {{- end }}
 
-  #######
-  # UDP #
-  #######
-
-  {{- range $port := $udp_ports }}
-  {{- if $port }}
-  upstream server_nodes_udp_{{ $port }} {
-    {{- range $server := $servers }}
-    server {{ $server }}:{{ $port }} max_fails=1 fail_timeout=10s;
-    {{- end }}
-  }
-
-  server {
-    listen        {{ $port }} udp;
-    proxy_pass    server_nodes_udp_{{ $port }};
-    proxy_timeout 600;
-    proxy_connect_timeout 2s;
-  }
-  {{- end }}
-  {{- end }}
 }

proxy/test/portmap.yaml

@@ -0,0 +1,7 @@
+ports:
+  1234.tcp:
+    - server-0
+    - server-1
+  4321.udp:
+    - agent-0
+    - agent-1