Puppet users - Jun 2010 - Installing several packages in order

I have some software with a list of patches that need to be installed in
order.  Different hosts want different patches (e.g. development hosts
get patches that are not yet ready for production).

Obviously I can do this:

    package { "basepackage":
	ensure => present,
    }
    package { "patch1":
	ensure => present,
	require => Package["basepackage"],
    package { "patch2":
	ensure => present,
	require => Package["patch1"],
    }
    package { "patch3":
	ensure => present,
	require => Package["patch2"],
    }

but I''d like to do something like this:

    $package_list => ["basepackage", "patch1", 
"patch2", "patch3"]
    # The above value would actually come from extlookup()

    install_packages_in_order { "title":
	package_list => $package_list
    }

    define install_packages_in_order($package_list) {
	...insert code here...
    }

or with alternating package names and version numbers:

    $package_list = ["basepackage", "1.2.3", 
		     "patch1", "1.2.3.0.1",
                     "patch2", "1.2.3.0.2",
                     "patch3", "1.2.3.0.3"]

I think I can make this work using some ugly code inside
inline_template, or maybe writing my own parser functions,
but does anybody have any easier suggestions?

--apb (Alan Barrett)

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Hello Alan,

I''ve got a file resource that makes sure a specific directory tree is 
created..

$dirs = ["/var", "/var/lanl", "/var/lanl/puppet"]

@file { $dirs :
       ensure => directory,
       owner => "root",
       group => "wheel",
       mode => 755,
       links => follow,
}

I would think that setting up a $packages array in the right order and 
doing something like:

package{ $packages :
       ensure => present,
}

would work...  I''m currently on 0.25.1, and hoping that it''ll
still work
that way when I upgrade.

Regards,
-Roy

On 6/15/10 10:00 AM, Alan Barrett wrote:
> I have some software with a list of patches that need to be installed in
> order.  Different hosts want different patches (e.g. development hosts
> get patches that are not yet ready for production).
>
> Obviously I can do this:
>
>      package { "basepackage":
> 	ensure =>  present,
>      }
>      package { "patch1":
> 	ensure =>  present,
> 	require =>  Package["basepackage"],
>      package { "patch2":
> 	ensure =>  present,
> 	require =>  Package["patch1"],
>      }
>      package { "patch3":
> 	ensure =>  present,
> 	require =>  Package["patch2"],
>      }
>
> but I''d like to do something like this:
>
>      $package_list =>  ["basepackage", "patch1", 
"patch2", "patch3"]
>      # The above value would actually come from extlookup()
>
>      install_packages_in_order { "title":
> 	package_list =>  $package_list
>      }
>
>      define install_packages_in_order($package_list) {
> 	...insert code here...
>      }
>
> or with alternating package names and version numbers:
>
>      $package_list = ["basepackage", "1.2.3",
> 		     "patch1", "1.2.3.0.1",
>                       "patch2", "1.2.3.0.2",
>                       "patch3", "1.2.3.0.3"]
>
> I think I can make this work using some ugly code inside
> inline_template, or maybe writing my own parser functions,
> but does anybody have any easier suggestions?
>
> --apb (Alan Barrett)
>
>    
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On Wed, 16 Jun 2010, Roy Nielsen wrote:
> I''ve got a file resource that makes sure a specific directory tree
> is created..
> 
> $dirs = ["/var", "/var/lanl",
"/var/lanl/puppet"]
> 
> @file { $dirs :
>       ensure => directory,
>       owner => "root",
>       group => "wheel",
>       mode => 755,
>       links => follow,
> }
Puppet automatically makes each file depend on its parent directory, so 
your exmple should work.
> I would think that setting up a $packages array in the right order
> and doing something like:
> 
> package{ $packages :
>       ensure => present,
> }
No, that won''t install the packages in any specific order.  There are
no
explicit or implicit dependencies between apckages in your example, but
in my case I want each package to explicitly depend on its predecessor
in the array.

--apb (Alan Barrett)

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On 2010-06-16 19:21, Alan Barrett wrote:
> No, that won''t install the packages in any specific order.  There
are no
> explicit or implicit dependencies between apckages in your example, but
> in my case I want each package to explicitly depend on its predecessor
> in the array.
How about this:

     define pkglist_helper()
     {
         $pkg  = inline_template(''<%= name.split(";")[0]
-%>'')
         $next = inline_template(''<%= name.split(";")[1]
or "" -%>'')

         if $next != "" {
             package {
                 $pkg:
                     ensure => installed,
                     before => Package[$next];
             }
         } else {
             package {
                 $pkg:
                     ensure => installed;
             }
         }
     }

     define packagelist($packages)
     {
         $foo = inline_template(
             ''<% lst = []; 0.upto(packages.length - 1) { |i|
                 lst << packages[i] + ";" + (packages[i+1] or
"");
              } -%><%              lst.join("|")
-%>'')
         $bar = split($foo, "[|]")

         pkglist_helper {
             $bar: ;
         }
     }

Use it like this:

     packagelist {
         some-packages--title-does-not-matter:
             packages => [ "foo", "bar",
"gazonk", "del", "xyzzy" ];
     }

I have only tested it very briefly (using notify instead of
package), but it seemed to work.


	/Bellman

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On Wed, 16 Jun 2010, Thomas Bellman wrote:
> >in my case I want each package to explicitly depend on its predecessor
> >in the array.
> 
> How about this:
Thank you!  I would eventually have written something involving
two defines calling eack other, with inline_template to munge the
arguments, but I would probably not have found such a simple
solution, and I had not yet started writing the code.

--apb (Alan Barrett)

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