improved CLI

[osm/vim-emu.git] / emuvim / dcemulator / node.py

diff --git a/emuvim/dcemulator/node.py b/emuvim/dcemulator/node.py
index 3ab6341..de64d69 100644 (file)
--- a/emuvim/dcemulator/node.py
+++ b/emuvim/dcemulator/node.py
@@ -2,12 +2,60 @@
 Distributed Cloud Emulator (dcemulator)
 (c) 2015 by Manuel Peuster <manuel.peuster@upb.de>
 """
+from mininet.node import Docker
 import logging
 
 
 DCDPID_BASE = 1000  # start of switch dpid's used for data center switches
 
 
+class EmulatorCompute(Docker):
+    """
+    Emulator specific compute node class.
+    Inherits from Dockernet's Docker host class.
+    Represents a single container connected to a (logical)
+    data center.
+    We can add emulator specific helper functions to it.
+    """
+
+    def __init__(
+            self, name, dimage, **kwargs):
+        logging.debug("Create EmulatorCompute instance: %s" % name)
+        self.datacenter = None  # pointer to current DC
+
+        # call original Docker.__init__
+        Docker.__init__(self, name, dimage, **kwargs)
+
+    def getNetworkStatus(self):
+        """
+        Helper method to receive information about the virtual networks
+        this compute instance is connected to.
+        """
+        # format list of tuples (name, Ip, MAC, isUp, status)
+        return [(str(i), i.IP(), i.MAC(), i.isUp(), i.status())
+                for i in self.intfList()]
+
+    def getStatus(self):
+        """
+        Helper method to receive information about this compute instance.
+        """
+        status = {}
+        status["name"] = self.name
+        status["network"] = self.getNetworkStatus()
+        status["image"] = self.dimage
+        status["cpu_quota"] = self.cpu_quota
+        status["cpu_period"] = self.cpu_period
+        status["cpu_shares"] = self.cpu_shares
+        status["cpuset"] = self.cpuset
+        status["mem_limit"] = self.mem_limit
+        status["memswap_limit"] = self.memswap_limit
+        status["state"] = self.dcli.inspect_container(self.dc)["State"]
+        status["id"] = self.dcli.inspect_container(self.dc)["Id"]
+        status["datacenter"] = (None if self.datacenter is None
+                                else self.datacenter.name)
+        return status
+
+
 class Datacenter(object):
     """
     Represents a logical data center to which compute resources
@@ -42,7 +90,7 @@ class Datacenter(object):
     def start(self):
         pass
 
-    def addCompute(self, name, image=None, network=None):
+    def startCompute(self, name, image=None, network=None):
         """
         Create a new container as compute resource and connect it to this
         data center.
@@ -51,6 +99,9 @@ class Datacenter(object):
         a single container can be connected.
         """
         assert name is not None
+        # no duplications
+        if name in [c.name for c in self.net.getAllContainers()]:
+            raise Exception("Container with name %s already exists." % name)
         # set default parameter
         if image is None:
             image = "ubuntu"
@@ -59,14 +110,18 @@ class Datacenter(object):
         # create the container and connect it to the given network
         d = self.net.addDocker("%s" % (name), dimage=image)
         self.net.addLink(d, self.switch, params1=network)
+        # do bookkeeping
         self.containers[name] = d
+        d.datacenter = self
         return name  # we might use UUIDs for naming later on
 
-    def removeCompute(self, name):
+    def stopCompute(self, name):
         """
         Stop and remove a container from this data center.
         """
-        assert name in self.containers
+        assert name is not None
+        if name not in self.containers:
+            raise Exception("Container with name %s not found." % name)
         self.net.removeLink(
             link=None, node1=self.containers[name], node2=self.switch)
         self.net.removeDocker("%s" % (name))