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Re: copy action trigger another action


From: Mark . Burgess
Subject: Re: copy action trigger another action
Date: Thu, 9 Jan 2003 23:47:43 +0100 (MET)


On  9 Jan, Luke A. Kanies wrote:
> On Thu, 9 Jan 2003, Alan Sparks wrote:
> 
>> If I read you right, that's what I do as standard practice.  I use a
>> define= on the copy action of a config file (ntp.conf, syslog.conf,
>> whatever) that trips a shellcommand for that class to do whatever is
>> necessary.
> 
> I've often wondered about copy (I am about to start using cfengine for a
> bit of stuff, but am not now):  Does it always copy, or does it only copy
> when the local file is different from the remote?  And if it only copies
> when something has changed, does it only set the define then, or does it
> always set the define?
> 
> In other words, if I set up to copy a config file, will it only copy that
> config file when the local copy is different than the remote (either
> because someone foolishly changed the local copy, or because the remote
> config has been updated) and then set the define, or does it always copy
> (given the repetition limits) and always define?
> 
>>From the limited use I've seen, it looks like it always copies, and always
> defines, but I could be remembering incorrectly.
> 


The cfengine religion says that all possible actions should be convergent.
You choose the policy yourself,

i) update by time comparison
ii) update by byte comparison
iii) update by checksum comparison

Definition occurs iff a file is copied. This is the only
behaviour that makes sense to me.

M

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