Well, I understand that much, but I want to validate that the parameter
passed to the called class is valid.
Right now I'm doing the logic for setting the valid releases in the params
class, like this:
case $::osfamily {
'RedHat': { $available_releases = ['5.5', '10.0'] }
'Debian': {
case $os {
'debian': {
case $::lsbmajrelease {
'6': { $available_releases = ['5.2', '5.3', '5.5', '10.0'] }
'7': { $available_releases = ['5.5', '10.0'] }
default: {
fail( "MariaDB not supported on ${::operatingsystem}
${::operatingsystemrelease}" )
}
}
}
'ubuntu': {
case $::lsbdistcodename {
/(hardy|maverick|natty|oneiric)/: {
if $::operatingsystem == 'LinuxMint' {
fail( "MariaDB not supported on ${::operatingsystem}
${::operatingsystemrelease}" )
} else {
$available_releases = ['5.2', '5.3']
}
}
'lucid': {
$available_releases = ['5.2', '5.3', '5.5', '10.0']
}
/(precise|quantal|raring)/: {
$available_releases = ['5.5', '10.0']
}
default: {
fail( "MariaDB not supported on ${::operatingsystem}
${::operatingsystemrelease}" )
}
}
}
default: {
fail( "MariaDB not supported on ${::operatingsystem}
${::operatingsystemrelease}" )
}
}
}
And then I do the validation of the $version variable as such:
if ! ($version in $available_releases) {
warning( "MariaDB ${version} not supported on ${::operatingsystem}
${::operatingsystemrelease}, setting release to ${available_releases[-1]}" )
$version = $available_releases[-1]
}
But maybe I just need to set the default value in params, and do the
validation in the maria class itself, to make sure scope is correct. Then I
would have to simply fail puppet, and not try to correct the user error,
like this:
if ! ($version in $maria::params::available_releases) {
fail( "MariaDB ${version} not supported on ${::operatingsystem}
${::operatingsystemrelease}, setting release to ${available_releases[-1]}" )
}
On Tuesday, July 30, 2013 8:29:40 AM UTC-4, Rahul Khengare wrote:
>
> Hi Stephen,
> As per my understanding of your query, you want version parameter value
> 5.5 as default and on passing parameter value its become 5.3.
> But in your case its take version = 5.5. Correct me if i am wrong.
>
> Solution for your query is u have to construct parameterized class maria
> and it has to be inheriated by maria::params.
>
> # maria class
> class maria (
> $version = maria::params::version
> ) inherits maria::params {
>
> notify { "$version" :}
> }
>
> # params class
> class maria::params {
> $version = '5.5'
> }
>
> # when we call the class maria with version parameter it set the $version
> value to passed value (here 5.3)
> class {"maria":
> $version => '5.3'
> }
>
> # when we call the class maria without version parameter it set the
> $version value to default value from params class (here 5.5)
> class {"maria":
> }
>
> I hope this will solve your problem. If i interpreted your query correctly.
>
> Thanks and Regards,
> Rahul Khengare.
> NTT DATA GTS (OSS centre)
> pune
>
>
> On Tuesday, July 30, 2013 12:08:17 AM UTC+5:30, Stephen Brown II wrote:
>>
>> Greetings all,
>>
>> I have a feeling I'm trying to be a bit too clever for my own good, or
>> making the mistake of treating the declarative language as a procedural.
>> But at any rate, here is my issue.
>>
>> I would like to set up a params class ( in the style of
>> http://docs.puppetlabs.com/guides/parameterized_classes<http://docs.puppetlabs.com/guides/parameterized_classes.html#appendix-smart-parameter-defaults>
>> ) for
>> installing mariadb on any operating system that is supported by the
>> official mariadb.org repository configuratior:
>> https://downloads.mariadb.org/mariadb/repositories/
>>
>> However, I've noticed that not all versions of MariaDB are available for
>> all OS releases. For the most part, 5.5 and 10.0 are available, but for
>> older versions of Ubuntu /(hardy|maverick|natty|oneiric)/, only 5.2 and 5.3
>> are available.
>>
>> Here is the gist of my params.pp as it stands:
>> https://gist.github.com/StephenBrown2/6106113
>>
>> What I would eventually like to get working is the ability for the module
>> to set a reasonable default, and also allow for overriding in the calling,
>> but if the operating system doesn't support that MariaDB release version,
>> to use the latest available release instead.
>>
>> For example, this should work fine:
>>
>> class { 'maria': }
>>
>> This should also work:
>>
>> class { 'maria':
>> version => '5.5',
>> }
>>
>> both resulting in mariadb 5.5 being installed on anything but those older
>> ubuntu's. in which case, Puppet would throw a warning and set $version
>> instead to '5.3'.
>>
>> Similarly, if this was specified:
>>
>> class { 'maria':
>> version => '5.3',
>> }
>>
>> on a Debian 7 system, I'd expect it to come back as '10.0'. But this
>> might be where the cleverness could be a liability.
>>
>> Might I have to simply set the default version for each possible
>> operatingsystem value? I would hope not, as that seems a bit unweildy, but
>> maybe necessary since variables can only be declared once per scope (
>> http://docs.puppetlabs.com/learning/variables<http://docs.puppetlabs.com/learning/variables.html#variables>
>> : "You can only assign the same variable *once* in a given scope." )
>>
>> Please let me know if I've been unclear, or enlighten me if this is going
>> down the wrong path.
>>
>> Thanks!
>> Stephen B
>>
>
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