Start development for default deployments.

Defauitl deployments require only a minimal set of configuration
input. Most values will be taken from defaults. It is up to the
project to re-define those default values.

src/v1/dc.py

@@ -217,7 +217,8 @@ class Container(YamlBase):
 
     @property
     def command(self):
-        """Command to execute on container start. must be a list or tuple"""
+        """Command to execute on container start. must be a list or tuple.
+        Overrides the image command."""
         return self._yaml['command']
     @command.setter
     def command(self, value):
@@ -229,14 +230,16 @@ class Container(YamlBase):
 
     @property
     def args(self):
-        """Args passed to the startup command """
+        """Args passed to the startup command. Must be a list or tuple.
+        Overrides the image args. """
         return self._yaml['args']
     @args.setter
     def args(self, value):
         if isinstance(value, Iterable) and not isinstance(value, basestring):
             self._yaml['args'] = value
         else:
-            raise InvalidType('Invalid type for value {0}. Must be list or tuple'.format(repr(value)))
+            raise InvalidType('Invalid type for value {0}. Must be list or tuple'
+                              .format(repr(value)))
 
     @property
     def workingDir(self):
@@ -254,7 +257,7 @@ class Container(YamlBase):
 
 @ConfigClass
 class PodSpec(YamlBase):
-    def __init__(self, name, image, containers):
+    def __init__(self, name, containers):
         self._volumes = []
         self._containers = containers
         self._restartPolicy = 'Always'
@@ -359,13 +362,25 @@ class Deployment(object):
         print config_dump(y, Dumper = yaml.SafeDumper, default_flow_style=False)
 
 
+def DefaultPorts():
+    return [PortSpec(8080, 'TCP'), PortSpec(8443, 'TCP')]
+
+def DefaultContainer(name, image):
+    return Container(name, image, DefaultPorts())
+
+def DefaultDeployment(namespace, name, image):
+    return Deployment(namespace, name,
+                      PodSpec(name,
+                              DefaultContainer(name, image)))
+
 def main():
     ports = [PortSpec(8080, 'TCP'), PortSpec(8443, 'TCP')]
     c = Container('test1', '172.30.1.1:5000/myproject/python-project', ports)
-    p = PodSpec('test1', "NoSuchImage", [c])
+    p = PodSpec('test1', [c])
     d = Deployment('myproject', 'test1', p)
     d.as_yaml()
-
+    dd = DefaultDeployment('myproject', 'test2','172.30.1.1:5000/myproject/python-project')
+    dd.as_yaml()
 
 if __name__ == '__main__':
     main()