added my hot crontab hacker which randomizes the times at which cron.daily runs.

git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@2126 ce84e21b-d406-0410-9b95-82705330c041

1 files changed, 39 insertions, 0 deletions

diff --git a/src/lib/Server/Plugins/Crontab.py b/src/lib/Server/Plugins/Crontab.py
new file mode 100644
index 000000000..fcdf58f42
--- /dev/null
+++ b/src/lib/Server/Plugins/Crontab.py
@@ -0,0 +1,39 @@
+'''This module manages the crontab file for bcfg2'''
+__revision__ = '$Revision: 1887 $'
+
+import binascii, os, socket, Bcfg2.Server.Plugin, random
+
+class Crontab(Bcfg2.Server.Plugin.Plugin):
+    '''This Generates a random set of times for the cron.daily entries to run.
+     The goal is to ensure that our Configuration Server/network does get crushed
+     all in a 5-10 minute period.
+'''
+    __name__ = 'Crontab'
+    __version__ = '$Id: Crontab 1887 2006-06-18 02:35:54Z desai $'
+    __author__ = 'bcfg-dev@mcs.anl.gov'
+
+    def __init__(self, core, datastore):
+        Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
+        try:
+            self.repository = Bcfg2.Server.Plugin.DirectoryBacked(self.data, self.core.fam)
+        except OSError, ioerr:
+            self.logger.error("Failed to load Crontab repository from %s" % (self.data))
+            self.logger.error(ioerr)
+            raise Bcfg2.Server.Plugin.PluginInitError
+        try:
+            prefix = open("%s/prefix" % (self.data)).read().strip()
+        except IOError:
+            prefix = ''
+        self.Entries = {'ConfigFile':
+                             {prefix + '/etc/crontab':self.build_crontab}}
+
+
+    def build_crontab(self, entry, metadata):
+        '''This function builds builds a crontab file with a random time for cron.daily'''
+        random.seed(metadata.hostname)
+        hour = random.randrange(0,6)
+        minute = random.randrange(0,59)
+        entry.text = self.repository.entries['crontab.template'].data% (minute, hour)
+        permdata = {'owner':'root', 'group':'root', 'perms':'0644'}
+        [entry.attrib.__setitem__(key, permdata[key]) for key in permdata]
+