Peter Bukowinski [11.10.2013 14:39]:
> On Oct 11, 2013, at 5:48 AM, Jakub Bittner <rex...@gmail.com> wrote:
>
>> Hello,
>>
>> I created puppet class and I want the file operation to be executed on all
>> servers but not on server with hostname "'server1.domain.com". I tried this
>> class, but it does not work. Is there any other way? Thanks
>>
>>
>> class test {
>> if $hostname != 'server1.domain.com' {
>> file { "/etc/ntp.conf":
>> owner => root,
>> group => root,
>> mode => 644,
>> source => "puppet:///files/server/ntp.conf",
>> }
>> }
>> }
>>
>
> You have a couple errors in your if statement. For comparing a literal
> string, you need to use double-equals in your test:
>
> if $hostname == 'server1.domain.com' { ... }
>
> For a regex match, you'd use the equal-tilde:
>
> if $hostname =~ /^server/ { ... }
>
> To negate a match, you put the not (!) in front of the entire comparison, e.g.
>
> if ! $hostname == 'server1.domain.com' { ... }
>
> I like to add parentheses around my comparisons for visual clarity:
>
> if ( $hostname =~ /^server/ ) and ! ( $virtual == 'vmware' ) { ... }
>
I do not see "a couple of errors". But I'm a novice, so you can enlarge
my knowledge easily ;-)
You show only one error by mentioning that the if statement may not have
an inequality sign: "To negate a match, you put the not (!) in front of
the entire comparison". Where can I find this in the puppet language
description?
First, I looked at
<http://docs.puppetlabs.com/puppet/3/reference/lang_conditional.html#if-statements>.
Under the caption "Conditions" I find - among others - "Expressions". So
I follow that link, and on the linked page under
<http://docs.puppetlabs.com/puppet/3/reference/lang_expressions.html#non-equality>
I find the != operator. I do not find any hint that one has to prepend
the nagation to the whole statement. In the contrary, in the "Syntax"
section I see a sample for a comparison with an inequality sign:
"($operatingsystem != 'Solaris')".
Where do I find that != is not allowed in this case?
BTW, I'd never write a class like that, I'd rather use different node
declarations... ;-)
Regards,
Werner
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