Option to use No IP Dynamic DNS

README.rst

@@ -109,6 +109,16 @@ Steps to get up-and-running on Heroku:
     # to set the MCL_EC2_REGION variable
     $ heroku config:set MCL_EC2_REGION=<EC2 region name>
 
+    # Optional Dynamic DNS Settings
+    # If you don't want to have a constantly-changing IP address, you can add your
+    # login credentials for https://www.noip.com (which is free!)
+    #
+    # This service gives you a URL that Minecloud will automatically point 
+    # to your server IP and keep up to date.
+    $ heroku config:set NO_IP_HOSTNAME=my-great-hostname.servegame.com
+    $ heroku config:set [email protected]
+    $ heroku config:set NO_IP_PASSWORD=secretpassword
+
     # Review all your settings
     $ heroku config
 

minecloud/launcher/tasks.py

@@ -12,6 +12,11 @@
 from .models import Instance
 from .sseview import send_event
 
+import urllib
+import urllib2
+import base64
+import string
+
 @task
 def launch(instance_id):
     # Retrive instance obj from DB.
@@ -64,6 +69,17 @@ def launch(instance_id):
     instance.save()
     send_event('instance_state', instance.state)
 
+    # Update dynamic IP
+    dynamic_ip_hostname = os.getenv('NO_IP_HOSTNAME', None)
+    dynamic_ip_username = os.getenv('NO_IP_USERNAME', None)
+    dynamic_ip_password = os.getenv('NO_IP_PASSWORD', None)
+    if dynamic_ip_hostname and dynamic_ip_username and dynamic_ip_password:
+        opener = urllib2.build_opener()
+        auth = base64.encodestring('%s:%s' % (dynamic_ip_username, dynamic_ip_password)).replace('\n', '')
+        opener.addheaders = [('User-agent', 'Minecloud-No-IP/1.0 http://github.com/toffer/minecloud'), ("Authorization", "Basic %s" % auth)]
+        url = "http://dynupdate.no-ip.com/nic/update?hostname=" + urllib.quote_plus(dynamic_ip_hostname) + "&myip=" + urllib.quote_plus(server.ip_address)
+        opener.open(url)
+
     # Send task to check if instance is running
     check_state.delay(instance_id, 'running')
 

minecloud/launcher/views.py

@@ -10,27 +10,29 @@
 from .models import Instance, Session
 from .sseview import SseView, send_event
 
+import os
 
 @login_required
 def index(request):
     instance = None
     current_sessions = None
     err_msg = None
     running_instances = Instance.objects.exclude(state__exact='terminated')
-    if len(running_instances) == 1: 
+    if len(running_instances) == 1:
         instance = running_instances[0]
         current_sessions = (Session.objects
             .filter(instance_id__exact=instance.id)
             .filter(logout__isnull=True)
         )
     elif len(running_instances) > 1:
         err_msg = "Error: Multiple instances are running at once."
-    return render(request, 
+    return render(request,
                   'launcher/index.html',
                   {'instance': instance,
                    'sessions': current_sessions,
+                   'no_ip_hostname': os.getenv('NO_IP_HOSTNAME', None),
                    'err_msg': err_msg})
-    
+
 @login_required
 @require_POST
 def launch(request):

templates/launcher/index.html

@@ -30,7 +30,15 @@ <h3>Server Info</h3>
     </div>
 {% elif instance and instance.state == 'pending' %}
     <div id="msm-up">
-        <h2>Server is <span class="text-info">waking up</span> at <span class="text-info">{{ instance.ip_address }}</span>.</h2>
+        <h2>Server is <span class="text-info">waking up</span> at
+            <span class="text-info">
+                {% if no_ip_hostname %}
+                {{ no_ip_hostname }}
+                {% else %}
+                {{ instance.ip_address }}
+                {% endif %}
+            </span>
+        </h2>
         <div class="row">
             <div class="span9">
                 <div class="alert alert-info alert-block"><p>Now, it's restoring saved game data. Almost ready...</p></div>
@@ -41,6 +49,12 @@ <h3>Server Info</h3>
                             <td class="server-info-field">IP Address</td>
                             <td>{{ instance.ip_address }}</td>
                         </tr>
+                        {% if no_ip_hostname %}
+                        <tr>
+                            <td class="server-info-field">DDNS Hostname</td>
+                            <td>{{ no_ip_hostname }}</td>
+                        </tr>
+                        {% endif %}
                         <tr>
                             <td class="server-info-field">Start Time</td>
                             <td>{{ instance.start }}</td>
@@ -56,14 +70,28 @@ <h3>Server Info</h3>
     </div>
 {% elif instance and instance.state == 'running' %}
     <div id="msm-up">
-        <h2>Server is <span class="text-success">running</span> at <span class="text-success">{{ instance.ip_address }}</span>.</h2>
+        <h2>Server is <span class="text-success">running</span> at
+            <span class="text-success">
+                {% if no_ip_hostname %}
+                {{ no_ip_hostname }}
+                {% else %}
+                {{ instance.ip_address }}
+                {% endif %}
+            </span>
+        </h2>
         <div class="row">
             <div class="span9">
                 <div class="alert alert-success alert-block">
                     <h4><p>Join the server!</p></h4>
                     <ul>
+                        {% if no_ip_hostname %}
+                        <li>Open Minecraft, click Multiplayer, and add a new server.</li>
+                        <li>Copy above hostname into the Server Address field.</li>
+                        {% else %}
                         <li>Open Minecraft, click Multiplayer, and edit the Server Info.</li>
                         <li>Copy the IP address into the Server Address field.</li>
+                        <li>This IP address will change each time the server is restarted.</li>
+                        {% endif %}
                     </ul>
                 </div>
 
@@ -74,6 +102,12 @@ <h3>Server Info</h3>
                             <td class="server-info-field">IP Address</td>
                             <td>{{ instance.ip_address }}</td>
                         </tr>
+                        {% if no_ip_hostname %}
+                        <tr>
+                            <td class="server-info-field">DDNS Hostname</td>
+                            <td>{{ no_ip_hostname }}</td>
+                        </tr>
+                        {% endif %}
                         <tr>
                             <td class="server-info-field">Start Time</td>
                             <td>{{ instance.start }}</td>
@@ -177,6 +211,6 @@ <h2>Server is <span class="text-error">sleeping</span>.</h2>
                 location.reload(true)
         }, false);
 
-    });    
+    });
     </script>
 {% endblock content %}