Refactor: tried to refactor code

- move scripts to assets/scripts (and updated build)
 - put most logic into HaproxyConfigGenerator
 - created DockerLabelHandler for all label handling from previous code
 - added unit tests and fixtures to cover HaproxyConfigGenerator and DockerLabelHandler
 - added a Makefile with build (for docker build) and test targets

templates/bind.j2

@@ -0,0 +1,8 @@
+    {% if "ssl_cert" in o %}
+    bind *:{{ o["port"] }}  ssl crt {{ o["ssl_cert"] }}
+    {% elif "h2" in o and o["h2"] %}
+    bind *:{{ o["port"] }} proto h2
+    option http-use-htx
+    {% else %}
+    bind *:{{ o["port"] }}
+    {% endif %}

templates/frontend-mode-http.j2

@@ -0,0 +1,11 @@
+    mode http
+    {% for k in o["redirect"] %}
+    redirect prefix {{ o["redirect"][k] }} code 301 if { hdr(host) -i {{ k }} }
+    {% endfor %}
+    {% for k in o["hosts"] %}
+        {% set host = k.replace(".", "_") + "_{0}_{1}".format(o["port"], salt) %}
+
+    acl is_rule_{{ host }}_1 hdr(host) -i {{ k }}
+    acl is_rule_{{ host }}_2 hdr(host) -i {{ k }}:{{ o["port"] }}
+    use_backend srv_{{ host }} if is_rule_{{ host }}_1 OR is_rule_{{ host }}_2
+    {% endfor %}

templates/frontend-mode-tcp.j2

@@ -0,0 +1,6 @@
+    mode tcp
+    option tcplog
+    log global
+{% set backend = (o["hosts"]|first) %}
+    default_backend srv_{{ backend.replace(".", "_") + "_{0}_{1}".format(o["port"], salt) }}
+

templates/haproxy.cfg.j2

@@ -1,3 +1,8 @@
+global
+    log stdout  format raw  local0  info
+    maxconn 2000
+    tune.ssl.default-dh-param 2048
+
 defaults
     log global
 
@@ -14,11 +19,6 @@ defaults
     errorfile 504 /etc/haproxy/errors-custom/504.http
 {% endif %}
 
-global
-    log stdout  format raw  local0  info
-    maxconn 2000
-    tune.ssl.default-dh-param 2048
-
 {% if "stats" in data %}
 frontend stats
     bind *:{{ data["stats"]["port"] | default(1936) }}
@@ -37,43 +37,31 @@ backend srv_stats
     mode http
     server Local 127.0.0.1:{{ data["stats"]["port"] | default(1936) }}
 {% endif %}
-
-{% for o in data["easymapping"] %}
+{% for o in data["easymapping"] -%}
     {% set mode = o["mode"] or "http" %}
     {% set salt = loop.index %}
+
 frontend {{ mode }}_in_{{ o["port"] }}_{{ salt }}
-    bind *:{{ o["port"] }} {{ " ssl crt " + o["ssl_cert"] if "ssl_cert" in o else "" }}
-    mode {{ mode }}
+    {% include "bind.j2" %}
+    {% if mode == "http" %}
+        {% include "frontend-mode-http.j2" %}
+    {% else %}
+        {% include "frontend-mode-tcp.j2" %}
+    {% endif %}
 
-    {% if mode == "tcp" -%}
-    option tcplog
-    tcp-request inspect-delay 5s
-    tcp-request content accept if { req.ssl_hello_type 1 }
-    {% endif -%}
-
-    {% for k in o["redirect"] -%}
-    redirect prefix {{ o["redirect"][k] }} code 301 if { hdr(host) -i {{ k }} }
-    {% endfor -%}
-
-    {% for k in o["hosts"] %}
-        {% set host = k.replace(".", "_") + "_{0}_{1}".format(o["port"], salt) %}
-    acl is_rule_{{ host }}_1 hdr(host) -i {{ k }}
-    acl is_rule_{{ host }}_2 hdr(host) -i {{ k }}:{{ o["port"] }}
-    use_backend srv_{{ host }} if is_rule_{{ host }}_1 OR is_rule_{{ host }}_2
-    {% endfor %}
-
-    {% for k in o["hosts"] %}
+    {% for k in o["hosts"] -%}
         {% set host = k.replace(".", "_") + "_{0}_{1}".format(o["port"], salt) %}
 backend srv_{{ host }}
     balance roundrobin
     mode {{ mode }}
-
-{% if mode == "http" %}
+        {% if mode == "http" %}
     option forwardfor
     http-request set-header X-Forwarded-Port %[dst_port]
     http-request add-header X-Forwarded-Proto https if { ssl_fc }
-{% endif %}
-
+        {% elif mode == "tcp" %}
+    option tcp-check
+    tcp-check connect
+        {% endif %}
     server srv {{ o["hosts"][k] }} check weight 1
     {% endfor %}
 {% endfor %}