fix a race in listvms when a machine is shutting down

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

diff --git a/files/usr/sbin/sipb-xen-listvms b/files/usr/sbin/sipb-xen-listvms
index aa99757..04dfc20 100755 (executable)
--- a/files/usr/sbin/sipb-xen-listvms
+++ b/files/usr/sbin/sipb-xen-listvms
@@ -1,3 +1,49 @@
-#!/bin/sh
+#!/usr/bin/python
 
-xm uptime | sed -n 's/^d_// p'
+import sys
+import time
+sys.path.insert(0, '/usr/lib/xen-3.1-1/lib/python')
+from xen.lowlevel.xs import xs
+
+trans = xs()
+
+def live_vms():
+    domids = set(trans.ls('', '/local/domain'))
+    domids.discard('0')
+
+    vms = dict()
+
+    for domid in domids:
+        try:
+            name, data = get_dom(int(domid))
+        except TypeError:
+            continue # went down since we started
+        if name.startswith('d_'):
+            name = name[2:]
+            vms[name] = data
+    return vms
+
+def get_dom(domid):
+    name = trans.read('', '/local/domain/%d/name' % domid)
+    data = dict()
+    data['domid'] = domid
+    # presence of a graphical console
+    data['console'] = trans.read('', '/local/domain/%d/device/vfb/0/state' % domid)
+    # uptime
+    data['vm'] = trans.read('', '/local/domain/%d/vm' % domid)
+    data['start_time'] = float(trans.read('', '%s/start_time' % data['vm']))
+    data['uptime'] = time.time()-data['start_time']
+    
+    return name, data
+
+if __name__ == '__main__':
+    vms = live_vms()
+    if '--json' in sys.argv[1:]:
+        import cjson
+        print cjson.encode(vms)
+    elif '--pickle' in sys.argv[1:]:
+        import cPickle
+        cPickle.dump(vms, sys.stdout, cPickle.HIGHEST_PROTOCOL)
+    else:
+        import yaml
+        print yaml.dump(vms, Dumper=yaml.CSafeDumper, default_flow_style=False)