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dirk.heinrichs@altum.de

2013-Mar-14 07:56 UTC

[Puppet Users] exec resource not refreshed when subscribed resource changes

Hello,

I''ve created a little class which should unpack a 7z archive on
Windows.
The class has a parameter for passing in the archive version, so that I can 
trigger an update when a new version of the archive is available. A 
simplyfied version looks like this (requires 7z):

class my_archive ($version = undef) {
    file { ''version'':
        path => ''C:/the_version'',
        content => $version,
        ensure => present,
        mode => 0666,
    }

    # Extracting archive creates C:/some/dir
    exec { ''unpack_archive'':
        command => "cmd /c rmdir /S /Q C:\some/dir & 7z x -oC:/some 
C:/path/to/archive-${version}.7z",
        creates => ''C:/some/dir/a_file'',
        require => File[''version''],
        path => $::path,
        subscribe => File[''version''],
    }
}

I trigger this from site.pp like so:

  class { ''my_archive'':
    version => ''1.2.3''
  }

The initial unpacking of (an older version of) the archive works fine, but 
when I change the version, I see that this change is recognized by the 
agent and a refresh is triggered, but the command isn''t executed:

Info: /Stage[main]/My_archive/File[version]: Filebucketed C:/the_version to 
puppet with sum 185910a1e94c599dc6541266286675bc
Notice: /Stage[main]/My_archive/File[version]/content: content changed 
''{md5}185910a1e94c599dc6541266286675bc'' to 
''{md5}d0cdd9a6594750ea1063643fcda90d3b''
Debug: /Stage[main]/My_archive/File[version]: The container 
Class[My_archive] will propagate my refresh event
Info: /Stage[main]/My_archive/File[version]: Scheduling refresh of 
Exec[unpack_archive]
Debug: /Schedule[weekly]: Skipping device resources because running on a 
host
Debug: Prefetching windows resources for package
Notice: /Stage[main]/My_archive/Exec[unpack_archive]: Triggered
''refresh''
from 1 events
Debug: /Stage[main]/My_archive/Exec[unpack_archive]: The container 
Class[My_archive] will propagate my refresh event
Debug: Class[My_archive]: The container Stage[main] will propagate my 
refresh event
Debug: /Schedule[puppet]: Skipping device resources because running on a 
host
Debug: Finishing transaction 144533424
Debug: Storing state
Debug: Stored state in 0.06 seconds
Notice: Finished catalog run in 0.75 seconds

I tried to omit "creates => ...", but this only makes the agent run
the
resource every time. I also tried adding "refreshonly => true", but
this
doesn''t help. I even tried adding "refresh => ..." with
the exact same
command without any change in behaviour.

Any hints what could be wrong?

Puppet Agent version on Windows is 3.1.0.

Thanks...

    Dirk

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Keith Burdis

2013-Mar-14 08:25 UTC

head link

Re: [Puppet Users] exec resource not refreshed when subscribed resource changes

Perhaps try:

1) Adding a notify => Exec[''unpack_archive''] to the file
resource.

2) Adding refreshonly => true to the exec.

3) Remove the creates and subscribe  from the exec.

That way the exec will only be called when the file changes.

- Keith
On 14 Mar 2013 07:56, <dirk.heinrichs@altum.de> wrote:
> Hello,
>
> I''ve created a little class which should unpack a 7z archive on
Windows.
> The class has a parameter for passing in the archive version, so that I can
> trigger an update when a new version of the archive is available. A
> simplyfied version looks like this (requires 7z):
>
> class my_archive ($version = undef) {
>     file { ''version'':
>         path => ''C:/the_version'',
>         content => $version,
>         ensure => present,
>         mode => 0666,
>     }
>
>     # Extracting archive creates C:/some/dir
>     exec { ''unpack_archive'':
>         command => "cmd /c rmdir /S /Q C:\some/dir & 7z x
-oC:/some
> C:/path/to/archive-${version}.7z",
>         creates => ''C:/some/dir/a_file'',
>         require => File[''version''],
>         path => $::path,
>         subscribe => File[''version''],
>     }
> }
>
> I trigger this from site.pp like so:
>
>   class { ''my_archive'':
>     version => ''1.2.3''
>   }
>
> The initial unpacking of (an older version of) the archive works fine, but
> when I change the version, I see that this change is recognized by the
> agent and a refresh is triggered, but the command isn''t executed:
>
> Info: /Stage[main]/My_archive/File[version]: Filebucketed C:/the_version
> to puppet with sum 185910a1e94c599dc6541266286675bc
> Notice: /Stage[main]/My_archive/File[version]/content: content changed
> ''{md5}185910a1e94c599dc6541266286675bc'' to
> ''{md5}d0cdd9a6594750ea1063643fcda90d3b''
> Debug: /Stage[main]/My_archive/File[version]: The container
> Class[My_archive] will propagate my refresh event
> Info: /Stage[main]/My_archive/File[version]: Scheduling refresh of
> Exec[unpack_archive]
> Debug: /Schedule[weekly]: Skipping device resources because running on a
> host
> Debug: Prefetching windows resources for package
> Notice: /Stage[main]/My_archive/Exec[unpack_archive]: Triggered
''refresh''
> from 1 events
> Debug: /Stage[main]/My_archive/Exec[unpack_archive]: The container
> Class[My_archive] will propagate my refresh event
> Debug: Class[My_archive]: The container Stage[main] will propagate my
> refresh event
> Debug: /Schedule[puppet]: Skipping device resources because running on a
> host
> Debug: Finishing transaction 144533424
> Debug: Storing state
> Debug: Stored state in 0.06 seconds
> Notice: Finished catalog run in 0.75 seconds
>
> I tried to omit "creates => ...", but this only makes the
agent run the
> resource every time. I also tried adding "refreshonly =>
true", but this
> doesn''t help. I even tried adding "refresh => ..."
with the exact same
> command without any change in behaviour.
>
> Any hints what could be wrong?
>
> Puppet Agent version on Windows is 3.1.0.
>
> Thanks...
>
>     Dirk
>
> --
> You received this message because you are subscribed to the Google Groups
> "Puppet Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to puppet-users+unsubscribe@googlegroups.com.
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> Visit this group at http://groups.google.com/group/puppet-users?hl=en.
> For more options, visit https://groups.google.com/groups/opt_out.
>
>
>
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dirk.heinrichs@altum.de

2013-Mar-14 08:26 UTC

head link

[Puppet Users] Re: exec resource not refreshed when subscribed resource changes

Am Donnerstag, 14. März 2013 08:56:31 UTC+1 schrieb
dirk.he...@altum.de:>
> Hello,
>
> I''ve created a little class which should unpack a 7z archive on
Windows.
> The class has a parameter for passing in the archive version, so that I can
> trigger an update when a new version of the archive is available. A 
> simplyfied version looks like this (requires 7z):
>
> class my_archive ($version = undef) {
>     file { ''version'':
>         path => ''C:/the_version'',
>         content => $version,
>         ensure => present,
>         mode => 0666,
>     }
>
>     # Extracting archive creates C:/some/dir
>     exec { ''unpack_archive'':
>         command => "cmd /c rmdir /S /Q C:\some/dir & 7z x
-oC:/some
> C:/path/to/archive-${version}.7z",
>         creates => ''C:/some/dir/a_file'',
>         require => File[''version''],
>         path => $::path,
>         subscribe => File[''version''],
>     }
> }
>
> I trigger this from site.pp like so:
>
>   class { ''my_archive'':
>     version => ''1.2.3''
>   }
>
> The initial unpacking of (an older version of) the archive works fine, but 
> when I change the version, I see that this change is recognized by the 
> agent and a refresh is triggered, but the command isn''t executed:
>
> Info: /Stage[main]/My_archive/File[version]: Filebucketed C:/the_version 
> to puppet with sum 185910a1e94c599dc6541266286675bc
> Notice: /Stage[main]/My_archive/File[version]/content: content changed 
> ''{md5}185910a1e94c599dc6541266286675bc'' to 
> ''{md5}d0cdd9a6594750ea1063643fcda90d3b''
> Debug: /Stage[main]/My_archive/File[version]: The container 
> Class[My_archive] will propagate my refresh event
> Info: /Stage[main]/My_archive/File[version]: Scheduling refresh of 
> Exec[unpack_archive]
> Debug: /Schedule[weekly]: Skipping device resources because running on a 
> host
> Debug: Prefetching windows resources for package
> Notice: /Stage[main]/My_archive/Exec[unpack_archive]: Triggered
''refresh''
> from 1 events
> Debug: /Stage[main]/My_archive/Exec[unpack_archive]: The container 
> Class[My_archive] will propagate my refresh event
> Debug: Class[My_archive]: The container Stage[main] will propagate my 
> refresh event
> Debug: /Schedule[puppet]: Skipping device resources because running on a 
> host
> Debug: Finishing transaction 144533424
> Debug: Storing state
> Debug: Stored state in 0.06 seconds
> Notice: Finished catalog run in 0.75 seconds
>
> I tried to omit "creates => ...", but this only makes the
agent run the
> resource every time. I also tried adding "refreshonly =>
true", but this
> doesn''t help. I even tried adding "refresh => ..."
with the exact same
> command without any change in behaviour.
>
> Any hints what could be wrong?
>
> Puppet Agent version on Windows is 3.1.0.
>
Got it: Omitting "creates" AND adding "refreshonly =>
true" makes the class
work as desired.

Bye...

    Dirk

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Felix Frank

2013-Mar-21 10:37 UTC

head link

Re: [Puppet Users] exec resource not refreshed when subscribed resource changes

Hi,

On 03/14/2013 09:25 AM, Keith Burdis wrote:> 2) Adding refreshonly => true to the exec.
> 
> 3) Remove the creates and subscribe  from the exec.
> 
The subscribe is actually fine, but yes - the ''creates'' needs
to go in
order to allow repeated execution.

Note that this can be considered unclean manifest design, because
a) notifications can get lost during agent crashes (if you''re unlucky)
and
b) if the exec fails, puppet will likely not notify again next time,
which is a painful and not at all unlikely failure scenario.

Ideally, you could construct a "dynamic" creates or unless clause,
that
will enable puppet to always infer wether the exec need running or not.

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Keith Burdis

2013-Mar-21 11:26 UTC

head link

Re: [Puppet Users] exec resource not refreshed when subscribed resource changes

The subscribe isn''t needed if notify is used which is in point 1. 
There
are multiple ways to solve the problem - I prefer pushing these events
using notify rather than pulling via subscribe :-)


On 21 March 2013 10:37, Felix Frank <felix.frank@alumni.tu-berlin.de>
wrote:
> Hi,
>
> On 03/14/2013 09:25 AM, Keith Burdis wrote:
> > 2) Adding refreshonly => true to the exec.
> >
> > 3) Remove the creates and subscribe  from the exec.
> >
>
> The subscribe is actually fine, but yes - the ''creates''
needs to go in
> order to allow repeated execution.
>
> Note that this can be considered unclean manifest design, because
> a) notifications can get lost during agent crashes (if you''re
unlucky) and
> b) if the exec fails, puppet will likely not notify again next time,
> which is a painful and not at all unlikely failure scenario.
>
> Ideally, you could construct a "dynamic" creates or unless
clause, that
> will enable puppet to always infer wether the exec need running or not.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Puppet Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to puppet-users+unsubscribe@googlegroups.com.
> To post to this group, send email to puppet-users@googlegroups.com.
> Visit this group at http://groups.google.com/group/puppet-users?hl=en.
> For more options, visit https://groups.google.com/groups/opt_out.
>
>
>
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