grid.promise: implement a new promise launcher in slapgrid

slapos/grid/promise/interface.py

+# coding: utf-8
+from zope.interface import Interface
+
+
+class IPromise(Interface):
+  """Base Promise interface."""
+
+  def __init__(config):
+    """
+      @param config: Configurations needed to start the promise
+    """
+
+  def anomaly(self):
+    """
+      Called to detect if there is an anomaly.
+      @return AnomalyResult object
+    """
+
+  def sense(self):
+    """
+      Run the promise code and store the result
+      raise error, log error message, ... for failure
+    """
+
+  def test(self):
+    """
+      Test promise and say if problem is detected or not
+      @return TestResult object
+    """