Thomas Bellman wrote:
> I'm reading about Augeas to see what can be done with it, and
> with the new 'augeas' resource type in 0.24.7. So far I have
> only played using augtool, not the Puppet integration, but I
> have a few questions:
The type is basically a wrapper around augtool. So.. the answer may be
"the same way". However, it may help to map the parameters in the type
to the augtool. Here they are:
* PARAMATER | Augtool Equivilant
* root | augtool -r option
* load_path | augtool -I option
* type_check | augtool -c option
* name | Nop real mapping. Used becuase puppet needs an ID
* changes | maps to the command in augtool.
* Contxt | No real mapping. It is used to avoid typing the complete path
name
* onlyif | No real mapping, used to control processing
Let me address some more below. David Lutterkort may be able to provide
better detail or approaches.
>
>
> 1. Is it possible to specify what lens to use for editing a
> certain file? Can I for instance tell it to use the sshd lens
> to edit an sshd config file in a non-standard place? Or to
> use the shellvars lens to edit /etc/sysconfig/sendmail (the
> version of Augeas in Fedora 9 happily edits lots of other
> files in /etc/sysconfig, but not the sendmail file). Do I
> have to write a new lens for this?
I believe you would have to copy the lens to a new location, and use the
load_path parameter.
>
>
> 2. How do I modify an entry in the tree, as opposed to rewrite it
> with a fixed string? For example, the grub.conf file has
> lines saying
>
> kernel /vmlinuz-2.6.27.5-41.fc9.x86_64 ro root=/dev/sda2 rhgb quiet
>
> and I want to remove the words "rhgb" and "quiet". Just doing
>
> set /files/etc/grub.conf/title[1]/kernel
> "/vmlinuz-2.6.27.5-41.fc9.x86_64 ro root=/dev/sda2"
>
> is the wrong answer, because I might not know what "/dev/sda2"
> should be on every system, and I certainly do not know what
> the version of the kernel should be.
>
> You might think that I could use the $kernelrelease fact, but
> the kernel line I want to modify might not be for the kernel
> that is actually running.
I believe this logic would need to be outside of the type creating the
line in a variable. Then you can set the variable in the augeas type.
>
>
> 3. Continuing the above grub.conf example, there may be an unknown
> number of kernel lines that need to be modified. How do I get
> augeas to modify all of them in the above way?
I believe you can set using wildcards to support this.
>
>
> 4. In the /etc/logrotate.conf file in Fedora and CentOS, there is
> an entry on the form:
>
> /var/log/wtmp {
> monthly
> create 0664 root utmp
> rotate 1
> }
>
> I want to comment out, or remove entirely, that entry. I can
> find it with
>
> match /files/etc/logrotate.conf/*/file "/var/log/wtmp"
>
> which right now happens to give me
>
> /files/etc/logrotate.conf/rule[1]/file
>
> After finding that information, I want to do
>
> rm /files/etc/logrotate.conf/rule[1]
>
> but how do I feed the information from the match back to the
> rm command?
I dont know of a way off hand. Lemme bug David about this one.
-- bk
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