jeff-l-mil...@uiowa.edu
On Nov 3, 2014 9:35 AM, "Thomas Bendler" <thomas.bend...@gmail.com> wrote:
> 2014-11-03 15:53 GMT+01:00 jcbollinger <john.bollin...@stjude.org>:
>
>> [
>> ...]
>>
>> As I understand, Puppet on every sync action recheck each file (rebuild
>>> md5 sum) on server and client for finding changes.
>>>
>>> On client computers this folder will be readonly, so we don't need to
>>> recheck md5 sums on every sync process. On server files will be changed
>>> very rarely too.
>>>
>> If the files were genuinely read-only then you would have a different
>> problem: Puppet would not be able to update them when that's needed. If
>> Puppet (running as root) *can* update them, on the other hand, then it
>> is *not* safe to assume that they will remain unchanged between Puppet
>> runs.
>> [
>> ...]
>>
>
> The easiest way will be an exec statement running an rsync process for
> the synchronization. Maybe based on a flag if things changed on server side
> like an empty file in the root directory every time a file changed:
>
> if $updateStart {
>
> file { '/srv/update':
>
> ensure => directory,
>
> recurse => true,
>
> purge => true,
>
> force => true,
>
> mode => 0644,
>
> owner => "root",
>
> group => "root",
>
> source => 'puppet:///module/update';
>
> }
>
> }
>
>
> exec { 'RsyncLocalFiles':
>
> command => "rsync -az u...@server1.example.com:/srv/files /srv/files &&
> rm /srv/update/start",
>
> onlyif => "/usr/bin/test -e /srv/update/start",
>
> }
>
> So can use Puppet to deploy the update file via an parameter if an update
> is needed and the sync remove the flag if finished. This is just
> quick'n'dirty, maybe there is a more elegant way.
>
> Regards Thomas
>
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