On Jul 14, 2010, at 5:23 PM, Erinn Looney-Triggs wrote: > I hope that the answer to this isn't posted up somewhere else, I have > looked around and I haven't found much of anything, augeas documentation > seems to be thin. Is there even full documentation for all the augeas > function and language syntax?
I’m not sure what all you’ve seen, but there are these: http://augeas.net/page/Main_Page#Using_Augeas (mostly the Path Expressions page) http://docs.puppetlabs.com/references/latest/type.html#augeas And then there’s the `help` command in `augtool` (and a man page). > What I am trying to do is edit the > grub.conf file and modify some parameters for each kernel line, remove > rhgb, add audit = 1. I would like for this to happen on all kernels > listed in /etc/grub.conf, so for audit I have: > > #Set audit=1 for grub.conf > augeas {"kernel_audit": > context => "/files/etc/grub.conf", > changes => "set title[*]/kernel/audit 1", > onlyif => "get title[*]/kernel/audit != 1", > } > > This suprisingly works, but only for the first entry in grub.conf I say > surprisingly because running the set command via augtool fails, so this > behaviour is a bit different for the ruby bindings. Does anyone with > some wicked augeas skill know how to express what I am trying to express > here? Is it even possible? I’ve done some experiments and haven’t come up with anything. The “onlyif” seems unnecessary to me, but of the thing doesn’t work in the first place, I suppose that doesn’t matter. > Second problem, rhgb. This is an empty node, as in it comes back rhgb = > (none) in augtool, I am trying to write an onlyif rule but how do you > match none? > > #Remove rhgb from kernel lines if it exists > augeas {"kernel_rhgb": > context => "/files/etc/grub.conf", > changes => "remove title[*]/kernel/rhgb", > onlyif => "match title[1]/kernel/rhgb == ['none']", > } > > Now again I would really like it to match all, and remove from all, > removal from all seems to work, but the match, as I said, fails. Have you tried just dropping the “onlyif”. I don’t see a need to check the value if you’re going to remove it anyway. In my experience, Puppet is pretty good about realizing when nothing needs to be done, so it should just pass it over silently if that value is missing. In a lot of situations like this, you can use `count()` as in `match title[*]/kernel/*[count(rhgb) = 1]`. Unfortunately with this particular case, Augeas seems to assign a count of 0 to both missing items and items with a value of “(none)”, so you can’t distinguish. There might be a way. I’m no expert. For what it’s worth, I know how to *set* it to “(none)” (using `clear`). :) -- Rob McBroom <http://www.skurfer.com/> Don't try to tell me something is important to you if the whole of your “support” entails getting Congress to force *others* to spend time and money on it. -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To post to this group, send email to puppet-us...@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
