configure http-in if health uri or certs (#41)

lib/kontena/templates/haproxy/main.text.erb

@@ -29,7 +29,7 @@ defaults
     <% end %>
     <% end %>
 
-<% if services.size > 0 %>
+<% if services.size > 0 || ssl? || health_uri? %>
 <%= http_in %>
 <% end %>
 

lib/kontena/views/common.rb

@@ -0,0 +1,12 @@
+module Kontena::Views
+  module Common
+
+    def ssl?
+      ENV['SSL_CERTS'] || ENV.any? { |env, value| env.start_with? 'SSL_CERT_' }
+    end
+
+    def health_uri?
+      ENV['KONTENA_LB_HEALTH_URI']
+    end
+  end
+end

lib/kontena/views/haproxy.rb

@@ -1,11 +1,13 @@
 require 'erb'
+require_relative 'common'
 require_relative 'http_in'
 require_relative 'http_backends'
 require_relative 'tcp_proxies'
 
 module Kontena::Views
   class Haproxy
     include Hanami::View
+    include Kontena::Views::Common
 
     format :text
     template 'haproxy/main'

lib/kontena/views/http_in.rb

@@ -1,12 +1,11 @@
+require_relative 'common'
+
 module Kontena::Views
   class HttpIn
     include Hanami::View
+    include Kontena::Views::Common
 
     format :text
     template 'haproxy/http_in'
-
-    def ssl?
-      ENV['SSL_CERTS'] || ENV.any? { |env, value| env.start_with? 'SSL_CERT_' }
-    end
   end
 end

spec/kontena/views/haproxy_spec.rb

@@ -1,7 +1,39 @@
 describe Kontena::Views::Haproxy do
 
-  describe '.render' do 
-    context 'stats' do 
+  describe '.render' do
+    context 'http-in' do
+      it 'does not configure http-in by default' do
+        output = described_class.render(
+          format: :text,
+          services: [],
+          tcp_services: []
+        )
+        expect(output.match(/listen http-in/)).to be_falsey
+      end
+
+      it 'configures http-in if health uri is defined' do
+        allow(ENV).to receive(:[])
+        allow(ENV).to receive(:[]).with('KONTENA_LB_HEALTH_URI').and_return('/__health')
+        output = described_class.render(
+          format: :text,
+          services: [],
+          tcp_services: []
+        )
+        expect(output.match(/listen http-in/)).to be_truthy
+      end
+
+      it 'configures http-in if ssl certs' do
+        allow(ENV).to receive(:[])
+        allow(ENV).to receive(:[]).with('SSL_CERTS').and_return('cert...')
+        output = described_class.render(
+          format: :text,
+          services: [],
+          tcp_services: []
+        )
+        expect(output.match(/listen http-in/)).to be_truthy
+      end
+    end
+    context 'stats' do
       it 'configures stats auth' do
         allow(ENV).to receive(:[])
         allow(ENV).to receive(:[]).with('STATS_PASSWORD').and_return('secrettzzz')