Adding mod_wsgi monitoring script from Bug #557049.

scripts/monitors/check_wsgi.py

@@ -0,0 +1,37 @@
+#!/usr/bin/python2.6
+"""Makes sure mod_wsgi has been restarted after the last code push i.e,
+   mod_wsgi is fresher than the mtime on all *.py files in the application dir.
+"""
+from datetime import datetime
+from optparse import OptionParser
+import os
+from subprocess import PIPE, Popen
+import urllib2
+
+def check_modwsgi(app_dir):
+    find_ = Popen("find %s -name '*.py'" % app_dir, stdout=PIPE, shell=True).communicate()[0]
+
+    py_files = find_.strip().split("\n")
+    newest_mtime = max((os.stat(f).st_mtime, f) for f in py_files)
+
+    req = urllib2.Request("http://localhost:81/z/services/loaded",
+                            headers={'Host': 'addons.mozilla.org'})
+
+    mod_wsgi = datetime.strptime(urllib2.urlopen(req).read().strip(), '%Y-%m-%d %H:%M:%S.%f')
+
+    if mod_wsgi < datetime.fromtimestamp(newest_mtime[0]):
+        print "CRITICAL: %s is newer than modwsgi (restart apache)" % newest_mtime[1]
+        return 2
+    else:
+        print "OK: mod_wsgi is fresh"
+        return 0
+
+
+if __name__ == "__main__":
+    parser = OptionParser()
+    parser.add_option('-d', '--app_dir',
+        help="directory of mod_wsgi app e.g., /data/amo_python/www/prod/zamboni")
+    
+    options, args = parser.parse_args()
+
+    exit(check_modwsgi(options.app_dir))