Peter Bukowinski [11.10.2013 15:57]:
> On Oct 11, 2013, at 9:06 AM, Werner Flamme <werner.fla...@ufz.de> wrote:
>
>> 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
>
>
> I've been using the convention where the not (!) is separate from the equals
> sign and it works well for me, so I suspect your only error was using a
> single equal sign rather than a the required double.
>
I'm not Jakub (the OP), it is not my problem.
I'm only the one who wanted to know where the "couple of errors" are.
Regards,
Werner
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