Of course, minutes after emailing that I found the answer to my own question.
If you install the augeasproviders_grub module ( https://github.com/hercules-team/augeasproviders_grub) then it becomes as simple as: kernel_parameter { 'transparent_hugepage': value => 'never', ensure => present, } In CentOS7, the module is smart enough to make the change to /etc/default/grub's GRUB_CMDLINE_LINUX variable. From a quick look at the code, it seems to do the right thing for other OSs too. The Augeas people never fail to impress! Tom On Wed, Jul 29, 2015 at 5:30 PM, Tom Limoncelli <t...@whatexit.org> wrote: > I need to disable transparent_hugepage at boot time (before some big > services start up). This is on centos7 machines using SystemD. > > There are many ways to do this. It isn't clear which is the > best/easiest way to do it via puppet. (Here is a list of ways to do > it manually > http://answers.splunk.com/answers/188875/how-do-i-disable-transparent-huge-pages-thp-and-co.html > and here is one more > http://docs.mongodb.org/manual/tutorial/transparent-huge-pages/) > > The most straightforward way seems to be to edit /etc/default/grub: > > Change this line in /etc/default/grub and add > transparent_hugepage=never to the GRUB_CMDLINE_LINUX. > > i.e. > > Change this line: > > GRUB_CMDLINE_LINUX="rd.lvm.lv=centos_ks-7/root > rd.lvm.lv=centos_ks-7/swap crashkernel=auto > vconsole.font=latarcyrheb-sun16 vconsole.keymap=us > intel_pstate=disable rhgb quiet transparent_hugepage=never" > > to > > GRUB_CMDLINE_LINUX="rd.lvm.lv=centos_ks-7/root > rd.lvm.lv=centos_ks-7/swap crashkernel=auto > vconsole.font=latarcyrheb-sun16 vconsole.keymap=us > intel_pstate=disable rhgb quiet transparent_hugepage=never" > > However doing that in puppet (even with Augeas) seems non-trivial. > > > > Any suggestions? > > Tom > > P.S. I'm also considering making a systemd "unit" that just sets the > parameter and is scheduled to run before any of the major services on > the machine. However that seems like a long way to do a short thing. > > -- > Email: t...@whatexit.org Work: tlimonce...@stackoverflow.com > Skype: YesThatTom > Blog: http://EverythingSysadmin.com > -- Email: t...@whatexit.org Work: tlimonce...@stackoverflow.com Skype: YesThatTom Blog: http://EverythingSysadmin.com -- 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+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/puppet-users/CAHVFxgm5Okv%3DrjDhkrxcQXtEP7OAASL5E-w%2BidT5QE8qJkDhCg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
