Add slapcontainer.promise recipe

setup.py

@@ -110,6 +110,7 @@ setup(name=name,
           'siptester = slapos.recipe.siptester:SipTesterRecipe',
           'simplelogger = slapos.recipe.simplelogger:Recipe',
           'slapcontainer = slapos.recipe.container:Recipe',
+          'slapcontainer.promise = slapos.recipe.container:Promise',
           'slaprunner = slapos.recipe.slaprunner:Recipe',
           'slapmonitor = slapos.recipe.slapmonitor:Recipe',
           'slapreport = slapos.recipe.slapreport:Recipe',

slapos/recipe/container.py

@@ -26,6 +26,9 @@
 ##############################################################################
 
 import ConfigParser
+import uuid
+import os
+import subprocess
 
 # XXX : This is in order to get the computer_partition object
 #       which exposes the state of the current partition.
@@ -34,6 +37,36 @@ import ConfigParser
 #       state of the current partition offline. But this is
 #       written to have the most minimal impact.
 from slapos.recipe.librecipe import GenericSlapRecipe
+from slapos.recipe.librecipe import GenericBaseRecipe
+
+def promise_func(args):
+
+    output = subprocess.check_output(
+        [args['lxc-info'], '-n', args['name']]
+    )
+
+    if 'RUNNING' in output:
+        return 0
+    else:
+        return 127
+
+
+
+class Promise(GenericBaseRecipe):
+
+    def install(self):
+        return [
+            self.createPythonScript(
+                self.options['promise'],
+                'slapos.recipe.container.promise_func',
+                {
+                    'lxc-info': self.options['lxc-info'],
+                    'name': self.options['slapcontainer-name']
+                }
+            )
+        ]
+
+
 
 class Recipe(GenericSlapRecipe):