remote: proxy control requests on running VMs to right host

[invirt/packages/invirt-remote.git] / files / usr / sbin / sipb-xen-remote-listvms

diff --git a/files/usr/sbin/sipb-xen-remote-listvms b/files/usr/sbin/sipb-xen-remote-listvms
index 172ca17..6690fb9 100755 (executable)
--- a/files/usr/sbin/sipb-xen-remote-listvms
+++ b/files/usr/sbin/sipb-xen-remote-listvms
@@ -1,37 +1,41 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/python

 
 """
 Collates the results of listvms from multiple VM servers.  Part of the xvm
 suite.
 """
 
 
 """
 Collates the results of listvms from multiple VM servers.  Part of the xvm
 suite.
 """
 

-from itertools import chain
-from subprocess import CalledProcessError, PIPE, Popen
-from sys import argv, stdout
-from yaml import safe_dump, safe_load
-
-###
+from subprocess import PIPE, Popen
+import sys
+import yaml

 
 def main(argv):
 
 def main(argv):

-  # Query each of the server for their VMs.
-  # TODO get `servers` from a real list of all the VM hosts (instead of
-  # hardcoding the list here)
-  servers = [ 'black-mesa.mit.edu', 'sx-blade-2.mit.edu' ]
-  # XXX
-  pipes = [ Popen(['remctl', server, 'remote', 'web', 'listvms'], stdout=PIPE)
-            for server in servers ]
-  outputs = [ p.communicate()[0] for p in pipes ]
-  for p in pipes:
-    if p.returncode != 0: raise CalledProcessError(p.returncode, cmd)
-  results = [ safe_load(o) for o in outputs ]
-  results = filter( lambda x: x is not None, results )
+    # Query each of the server for their VMs.
+    # TODO get `servers` from a real list of all the VM hosts (instead of
+    # hardcoding the list here)
+    servers = ['black-mesa.mit.edu', 'sx-blade-2.mit.edu']
+    # XXX
+    pipes = [(server,
+              Popen(['remctl', server, 'remote', 'web', 'listvms'], stdout=PIPE))
+             for server in servers]
+    outputs = [(s, p.communicate()[0]) for (s, p) in pipes]
+    for (s, p) in pipes:
+        if p.returncode != 0:
+            raise RuntimeError("remctl to host %s returned non-zero exit status %d"
+                               % (s, p.returncode)) 
+    results = [(s, yaml.load(o, yaml.CSafeLoader)) for (s, o) in outputs]
+    results = filter(lambda (_, x): x is not None, results)
+
+    # Merge the results and print.
+    merged = {}
+    for server, result in results:
+        for data in result.itervalues():
+            data['host'] = server
+        merged.update(result)

 
 

-  # Merge the results and print.
-  merged = {}
-  for result in results: merged.update(result)
-  print safe_dump(merged, default_flow_style=False)
+    print yaml.dump(merged, Dumper=yaml.CSafeDumper, default_flow_style=False)

 
 if __name__ == '__main__':
 
 if __name__ == '__main__':

-  main(argv)
+    main(sys.argv)

 
 

-# vim:et:sw=2:ts=2
+# vim:et:sw=4:ts=4