1 files changed, 31 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/random_crontab_minutes.rb b/lib/puppet/parser/functions/random_crontab_minutes.rb
new file mode 100644
index 0000000..8ab29e1
--- /dev/null
+++ b/lib/puppet/parser/functions/random_crontab_minutes.rb
@@ -0,0 +1,31 @@
+#
+# random_crontab_minutes.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:random_crontab_minutes, :type => :rvalue, :doc => <<-EOS
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "Wrong number of arguments " +
+      "given (#{arguments.size} for 2)") if arguments.size < 2
+
+    require 'md5'
+
+    job_name = arguments[0]
+    host     = arguments[1]
+
+    #
+    # Pick a random number based on the job and host name.  This will yield
+    # the same value for exactly the same combination of the job and host name.
+    #
+    value = MD5.new(job_name + host).to_s.hex % 60
+
+    # Minutes are from 0 to 59 inclusive ...
+    value = value < 60 ? value : 59
+
+    return value
+  end
+end
+
+# vim: set ts=2 sw=2 et :