Augeas hates me!!!

[randal cobb]

Hello, all!

I am trying to add some new modules to an openSuse 13.1 host with Puppet and Augeas with no luck.  The modules themselves are already installed by the example42/apache module, but I can't get the apache::module syntax to properly add the modules to the proper openSuse config files.  So, I'm opting for Augeas to do the dirty-work.  I have the following definition in the server's manifest (dev-apache.pp) file (the apache::module command are still there, but don't work, so the augeas section is the brute-force attempt; I just included them both so you can see the current state of this class manifest):

 

        ...

        apache::module { 'status': }
        apache::module { 'asis': }
        apache::module { 'auth_digest': }
        apache::module { 'headers': }
        apache::module { 'proxy': }
        apache::module { 'proxy_http': }
        apache::module { 'rewrite': }
        apache::module { 'vhost_alias': }
        apache::module { 'authz_default': }
        apache::module { 'proxy_balancer': }

    augeas { 'apache2':
        context => "/files/etc/sysconfig/apache2",
        lens    => "sysconfig.lns",
        incl    => '/usr/share/augeas/lenses/dist/',
        changes =>
                'set APACHE_MODULES "actions alias auth_basic authn_file authz_host authz_groupfile authz_user autoindex cgi dir env expires include log_config mime negotiation setenvif ssl userdir reqtimeout authn_core authz_core status asis auth_digest headers proxy proxy_http rewrite vhost_alias authz_default proxy_balancer"',
    }
    ...

When running the agent in --debug --verbose --test, I get this debug output from augeas:

Debug: Augeas[apache2](provider=augeas): Opening augeas with root /, lens path , flags 64
Debug: Augeas[apache2](provider=augeas): Augeas version 1.0.0 is installed
Debug: Augeas[apache2](provider=augeas): Will attempt to save and only run if files changed
Debug: Augeas[apache2](provider=augeas): sending command 'set' with params ["/files/etc/sysconfig/apache2/APACHE_MODULES", "actions alias auth_basic authn_file authz_host authz_groupfile authz_user autoindex cgi dir env expires include log_config mime negotiation setenvif ssl userdir reqtimeout authn_core authz_core status asis auth_digest headers proxy proxy_http rewrite vhost_alias authz_default proxy_balancer"]
Debug: Augeas[apache2](provider=augeas): Skipping because no files were changed
Debug: Augeas[apache2](provider=augeas): Closed the augeas connection

No errors, but the file is marked as unchanged.  

Before the puppet run, /etc/sysconfig/apache2 contains this line:

APACHE_MODULES="foo"

and obviously, it's the same afterwards.

Any insight into what I may be doing wrong?

[Vikas Kumar]

Hello,

I think double quotes in your set statement are the culprit.

Try to use set as below

'set /files/whatever/path \'"your text in quotes"\'',

Regards,

Vikas

[randal cobb]

Thanks,  I'll give that a try in the morning.

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[randal cobb]

ok, that didn't seem to help.  I now have this result:

Debug: Augeas[apache2](provider=augeas): Opening augeas with root /, lens path , flags 64
Debug: Augeas[apache2](provider=augeas): Augeas version 1.0.0 is installed
Debug: Augeas[apache2](provider=augeas): Will attempt to save and only run if files changed
Debug: Augeas[apache2](provider=augeas): sending command 'set' with params ["/files/etc/sysconfig/apache2/APACHE_MODULES", "\"actions alias auth_basic authn_file authz_host authz_groupfile authz_user autoindex cgi dir env expires include log_config mime negotiation setenvif ssl userdir reqtimeout authn_core authz_core status asis auth_digest headers proxy proxy_http rewrite vhost_alias authz_default proxy_balancer\""]
Debug: Augeas[apache2](provider=augeas): Skipping because no files were changed
Debug: Augeas[apache2](provider=augeas): Closed the augeas connection

from this manifest entry:

    augeas { 'apache2':
        context => "/files/etc/sysconfig/apache2",
        lens    => "sysconfig.lns",
        incl    => '/usr/share/augeas/lenses/dist/',
        changes =>
                'set APACHE_MODULES \'"actions alias auth_basic authn_file authz_host authz_groupfile authz_user autoindex cgi dir env expires include log_config mime negotiation setenvif ssl userdir reqtimeout authn_core authz_core status asis auth_digest headers proxy proxy_http rewrite vhost_alias authz_default proxy_balancer"\'',
    }

[John Warburton]

On 14 August 2014 01:22, randal cobb <rco...@gmail.com> wrote:

ok, that didn't seem to help.  I now have this result:

Debug: Augeas[apache2](provider=augeas): Opening augeas with root /, lens path , flags 64

You may find templates much easier to manage

I gave up on Augeas a long time ago due to this complexity, lack of lenses and because to someone looking at a file, it wasn't obvious augeas/puppet was managing it. A file with VCS artefacts at the top makes it more obvious what is going on..

John

[Poil]

Hi,

I think you can use "file_line" from stdlib https://forge.puppetlabs.com/puppetlabs/stdlib#file_line
It's really more simple than Augeas and it works better.

For multi-line I also use "editfile" a custom module, but you need to be good with regex =) https://github.com/mstrauss/puppet-editfile

Best regards,

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[Wil Cooley]

On Wed, Aug 13, 2014 at 8:22 AM, randal cobb <rco...@gmail.com> wrote:

from this manifest entry:

    augeas { 'apache2':
        context => "/files/etc/sysconfig/apache2",
        lens    => "sysconfig.lns",
        incl    => '/usr/share/augeas/lenses/dist/',
        changes =>
                'set APACHE_MODULES \'"actions alias auth_basic authn_file authz_host authz_groupfile authz_user autoindex cgi dir env expires include log_config mime negotiation setenvif ssl userdir reqtimeout authn_core authz_core status asis auth_digest headers proxy proxy_http rewrite vhost_alias authz_default proxy_balancer"\'',
    }

Try instead:

  augeas { 'apache2':

    incl    => '/etc/sysconfig/apache2',

    lens    => 'Sysconfig.lns',

    changes => ...

  }

 You probably don't *need* either the "incl" or "lens" parameters but my experience is that agent performance is absymal without them; otherwise Augeas will scan and load all of the files it knows about when it starts up, which is slow -- and coupled with the fact the Puppet provider creates a new Augeas instance for every resource (unless this bug has been fixed), it's really slow.

You might find more help with the Augeas guide:

https://docs.puppetlabs.com/guides/augeas.html

As others have said, Augeas can be tough to get your head around, in part because there are at least 4 or 5 different "languages" involved, some of which are confusingly similar or bleed into each other:

• Lens schema language
  
• Path expressions (and the link to the path expression doc is buried in the "Tree" page and 404 anyway; should be https://github.com/hercules-team/augeas/wiki/Path-expressions)
  
• Tree structure & magic control files under "/augeas"
• Tree manipulation and query commands which are similar but not wholly isomorphic:
  
• "augtool" commands
• Puppet parameters for Augeas type
• Language bindings aka "public API": C, Ruby

To effectively test and develop Puppet resources, you need everything EXCEPT the lens schema language. Unfortunately, if you click the "Documentation" link on augeas.net, only the first sub-items are NOT related to lens schema development. And docs extracted under "Stock Lenses" is a muddle of both.

Wil