Issue #2462 has been updated by Luke Kanies.
So what do you recommend as the actual behaviour here? Should the minute just default to '0' or something?
And I'd certainly accept a patch that treated '*' as absent, but that seems like mostly a documentation problem.
- Author: Simon Mudd
- Status: Needs design decision
- Priority: Normal
- Assigned to:
- Category: cron
- Target version:
- Complexity: Unknown
- Affected version: 0.24.8
As per http://reductivelabs.com/trac/puppet/wiki/TypeReference#cron
Installs and manages cron jobs. All fields except the command and the user are optional, although specifying no periodic fields would result in the command being executed every minute. While the name of the cron job is not part of the actual job, it is used by Puppet to store and retrieve it."
I think this behaviour is dangerous as it means that default behaviour is a to run a minutely job. That means that if the period fields are not specified by mistake the effect will be to generate very frequent cron activity.
I used to configure my cron jobs like this:
command => '/path/to/minutely/script',
ensure => present,
hour => '*',
minute => '*',
However this generates extra logging, making it look like the configuration is incorrect (or not expected):
Wed Jul 29 15:45:17 +0200 2009 //Node[dc01mdb-01.mydomain.com]/s_db/s_db::config/Cron[db_config]/hour (notice): defined 'hour' as '*'
Wed Jul 29 15:45:19 +0200 2009 //Node[dc01mdb-01.mydomain.com]/s_db/s_db::cron/Cron[log_processlist]/minute (notice): defined 'minute' as '*'
Wed Jul 29 15:45:19 +0200 2009 //Node[dc01mdb-01.mydomain.com]/s_db/s_db::cron/Cron[log_processlist]/hour (notice): defined 'hour' as '*'
From my point of view the correct cron entries were being created.
A colleague of mine said:
"Nasty, if you forget the timings, you get the worst case of the most frequent run of your job. I would make the arguments required and not optional. Cron jobs that need to run every minute are rare in the real world so that shouldn't be the default."
I tend to agree. I would prefer that it's possible define '*' without getting special notifications, and perhaps even that if no period fields are specified that a warning is generated.
Also the documentation should say that it's possible to specify '*' for "all values in that period".
We are using a custom built rpm based on puppet-0.24.8-1 on centos4 and 5.
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