Augeas fstab question

[Joe]

I'm trying to add a mount option using puppet/augeas. Something like:

class acl {
augeas { "var_fs_acl":
context => "/files/etc/fstab",
changes => ["ins opt after *[file='/var']/
opt[last()]",
"set *[file='/var']/opt[last()] acl"],
onlyif => "match *[file='/var']/opt[.='acl'] size ==
0"
}
}

This works if /var is a filesystem, but fails if /var is not. Since I
can't have two onlyif clauses, I'm not sure how to say:
If /var is a filesystem and
doesn't already have an opt of acl

Any suggestions would be appreciated.

joe

[Christopher Wood]

Try the mount type?

http://docs.puppetlabs.com/references/stable/type.html#mount

(Any particular reason for using augeas?)

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[David Rolston]

On Fri, Feb 10, 2012 at 12:15 PM, Christopher Wood <christop...@pobox.com> wrote:

Try the mount type?

http://docs.puppetlabs.com/references/stable/type.html#mount

(Any particular reason for using augeas?)

On Fri, Feb 10, 2012 at 12:10:56PM -0800, Joe wrote:
> I'm trying to add a mount option using puppet/augeas. Something like:
>
> class acl {
>         augeas { "var_fs_acl":
>                 context => "/files/etc/fstab",
>                 changes => ["ins opt after *[file='/var']/
> opt[last()]",
>                             "set *[file='/var']/opt[last()] acl"],
>                 onlyif => "match *[file='/var']/opt[.='acl'] size ==
> 0"
>         }
> }
>
> This works if /var is a filesystem, but fails if /var is not. Since I
> can't have two onlyif clauses, I'm not sure how to say:
> If /var is a filesystem and

I second this recommendation -- if it can be done with mount, then that will make things cleaner for you.  Also, I would question the assumption that you can't have multiple onlyif elements.  Most of the time, where you can pass one thing, you can also pass an array, and that works, so you might try that.  However, you can do something like this with a define for example:


class nfsclient {  /// some dependencies I've omitted

 define nfs_mount(
                $device,
                $location = "/nfs/nfsa",
                $fstype,
                $owner,
                $group,
                $mode,
                $options = "soft,intr,noatime"
        ){
        file { "${location}/${name}":
                ensure => directory,
                owner => "${owner}",
                group => "${group}",
                mode => "${mode}",
        }
        mount { "${location}/${name}":
                atboot => true,
                ensure => "mounted",
                device => "${device}",
                fstype => "${fstype}",
                options => "${options}",
                pass => "2",
                require => File["${location}/${name}"],
        }
  }
  nfs_mount { "nfsvol1":
                device => "nfsa.internal.site.com:/nfsvol1",
                fstype => "nfs",
                owner => "root",
                mode => "777",
                options => "soft,intr,noatime",
                subscribe => File['/etc/idmapd.conf'],
  }
}

[Dominic Cleal]

Try this:

augeas { "var_fs_acl":
context => "/files/etc/fstab",
changes => [

"ins opt after *[file='/var']/opt[last()]",

"set *[file='/var']/opt[last()] acl",
],

onlyif => "match *[file='/var' and count(opt[.='acl'])=0] size > 0",
}

The idea is that the match condition in onlyif will return the /var
node, only when it has no "acl" opt nodes beneath it.

While the above may work, I'd urge you to consider how you configure
systems with Puppet. Detecting the current configuration (i.e. does or
doesn't have /var) before applying changes is best done with custom
facts or only applying the class to nodes that are supposed to have
/var, rather than complex "onlyif" workarounds on resources.

Hope that helps,

--
Dominic Cleal
Red Hat Consulting
m: +44 (0)7817 878113