Making Linux Ping start as early as deployment

diff --git a/src/nepi/execution/resource.py b/src/nepi/execution/resource.py
index ba84805..2d24dd1 100644 (file)
--- a/src/nepi/execution/resource.py
+++ b/src/nepi/execution/resource.py
@@ -429,7 +429,7 @@ class ResourceManager(Logger):
         :rtype: str
 
         """
-        return " %s guid: %d - %s " % (self._rtype, self.guid, msg)
+        return " %s guid %d - %s " % (self._rtype, self.guid, msg)
 
     def register_connection(self, guid):
         """ Registers a connection to the RM identified by guid

diff --git a/src/nepi/resources/linux/ccn/fibentry.py b/src/nepi/resources/linux/ccn/fibentry.py
index dca91c2..bdf0c68 100644 (file)
--- a/src/nepi/resources/linux/ccn/fibentry.py
+++ b/src/nepi/resources/linux/ccn/fibentry.py
@@ -164,6 +164,7 @@ class LinuxFIBEntry(LinuxApplication):
             self._ping = self.ec.register_resource("LinuxPing")
             self.ec.set(self._ping, "printTimestamp", True)
             self.ec.set(self._ping, "target", self.get("host"))
+            self.ec.set(self._ping, "earlyStart", True)
             self.ec.register_connection(self._ping, self.node.guid)
             # schedule ping deploy
             self.ec.deploy(guids=[self._ping], group = self.deployment_group)

diff --git a/src/nepi/resources/linux/ping.py b/src/nepi/resources/linux/ping.py
index a3df579..0031e18 100644 (file)
--- a/src/nepi/resources/linux/ping.py
+++ b/src/nepi/resources/linux/ping.py
@@ -156,6 +156,12 @@ class LinuxPing(LinuxApplication):
             "The host to ping .",
             flags = Flags.Design)
 
+        early_start = Attribute("earlyStart",
+            "Start ping as early as deployment. ",
+            type = Types.Bool,
+            default = False,
+            flags = Flags.Design)
+
         cls._register_attribute(count)
         cls._register_attribute(mark)
         cls._register_attribute(interval)
@@ -179,17 +185,57 @@ class LinuxPing(LinuxApplication):
         cls._register_attribute(deadline)
         cls._register_attribute(timeout)
         cls._register_attribute(target)
+        cls._register_attribute(early_start)
 
     def __init__(self, ec, guid):
         super(LinuxPing, self).__init__(ec, guid)
         self._home = "ping-%s" % self.guid
 
+    def upload_start_command(self):
+        if self.get("earlyStart") == True:
+            command = self.get("command")
+            env = self.get("env")
+
+            # We want to make sure the FIB entries are created
+            # before the experiment starts.
+            # Run the command as a bash script in the background, 
+            # in the host ( but wait until the command has
+            # finished to continue )
+            env = env and self.replace_paths(env)
+            command = self.replace_paths(command)
+
+            # ccndc seems to return exitcode OK even if a (dns) error
+            # occurred, so we need to account for this case here. 
+            (out, err), proc = self.execute_command(command, 
+                    env, blocking = True)
+
+            if proc.poll():
+                msg = "Failed to execute command"
+                self.error(msg, out, err)
+                raise RuntimeError, msg
+        else:
+            super(LinuxPing, self).upload_start_command()
+
     def do_deploy(self):
         if not self.get("command"):
             self.set("command", self._start_command)
 
         super(LinuxPing, self).do_deploy()
 
+    def do_start(self):
+        if self.get("earlyStart") == True:
+            if self.state == ResourceState.READY:
+                command = self.get("command")
+                self.info("Starting command '%s'" % command)
+
+                self.set_started()
+            else:
+                msg = " Failed to execute command '%s'" % command
+                self.error(msg, out, err)
+                raise RuntimeError, msg
+        else:
+           super(LinuxPing, self).do_start()
+
     @property
     def _start_command(self):
         args = []