Hi Mike
Yes, create_resources seems to be just right.
Thanks for the hint.
- Stefan
Am Sonntag, 25. August 2013 22:03:47 UTC+2 schrieb Mike Delaney:
>
> Hi Stefan,
>
> I believe for the general case, the best practice is to encapsulate the
> logic that can't
> be expressed directly in the PuppetDSL in custom functions called from the
> DSL.
> Some of the features in the new experimental parser like iteration are
> aimed at
> reducing the need to write trivial, one-off functions.
>
> In this particular case, you can easily re-write your RubyDSL class in the
> PuppetDSL
> using the standard create_resources() function:
>
> class hosts {
> create_resources('host', $::host_entries)
> }
>
>
> http://docs.puppetlabs.com/references/3.2.latest/function.html#createresources
>
> If you haven't already, I'd definitely recommend adding the stdlib module,
> as it
> includes a ton of useful functions.
>
> https://forge.puppetlabs.com/puppetlabs/stdlib
>
> -Mike
>
> On Sun, Aug 25, 2013 at 9:39 AM, Stefan Schmid <[email protected] <javascript:>
> > wrote:
>
>> Hi
>>
>> I am new to puppet and need to manage host entries in file /etc/hosts as
>> follows on node mail.example.com and db.example.com. I do not want to
>> manage the whole file /etc/hosts with puppet, only a few entries.
>>
>> puppet version 3.2.1
>>
>> node mail.example.com, file /etc/hosts:
>> (..)
>> 172.16.89.96 ldapmaster.example.com ldapmaster ldap
>> 172.16.89.85 sms.example.com sms sms-gateway
>> (..)
>>
>> node db.example.com, file /etc/hosts:
>> (..)
>> 172.16.89.80 abc.example.com abc
>> 172.16.89.81 xyz.example.com xyz bigben
>> (..)
>>
>> In general, a node may have 0 to n host entries. The number of host
>> entries on a node A may differ from the number host entries on a node B. A
>> certain host entry ( IP-Address Full-Qualified-Hostname Short-Hostname)
>> may be in the file /etc/hosts on 0 to n nodes concurrently.
>>
>> To manage the above host entries on node mail.example.com and
>> db.example.com I used Ruby DSL as follows, then I learnt that Ruby DSL
>> is deprecated. What is the alternative to Ruby DSL ? Any hint
>> would be helpful.
>>
>> A puppet module using Ruby DSL:
>>
>> puppetmaster:/etc/puppet/modules/hosts/manifests # cat init.rb
>>
>> hostclass :hosts do
>>
>> entries = scope.lookupvar("hosts_entries")
>>
>> raise Puppet::ERROR,
>> "hosts_entries must be a Hash" unless entries.kind_of?(Hash)
>>
>> entries.each do |title, parameters|
>>
>> host( title,
>> :ensure => parameters["ensure"],
>> :target => parameters["target"],
>> :ip => parameters["ip"],
>> :host_aliases => parameters["host_aliases"])
>> end
>> end
>>
>> puppetmaster:/etc/puppet/modules/hosts/manifests #
>>
>>
>> Basic ENC script output for the Ruby DSL and node mail.example.com :
>> (..)
>> ---
>> parameters:
>> hosts_entries:
>> sms.example.com:
>> ensure: present
>> target: /etc/hosts
>> ip: 172.16.89.85
>> host_aliases:
>> - sms
>> - sms-gateway
>> ldapmaster.example.com:
>> ensure: present
>> target: /etc/hosts
>> ip: 172.16.89.96
>> host_aliases:
>> - ldapmaster
>> - ldap
>> classes:
>> - hosts
>> (..)
>>
>>
>> Basic ENC script output for the Ruby DSL and node db.example.com :
>> (..)
>> ---
>> parameters:
>> hosts_entries:
>> abc.example.com:
>> ensure: present
>> target: /etc/hosts
>> ip: 172.16.89.80
>> host_aliases: abc
>> xyz.example.com:
>> ensure: present
>> target: /etc/hosts
>> ip: 172.16.89.81
>> host_aliases:
>> - xyz
>> - bigben
>> classes:
>> - hosts
>> (..)
>>
>>
>> Thanks.
>>
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>
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