Well that's odd, I was looking at the exact same issue this morning for
sysctl.conf / oracle stuff.
But why are people writing new facts?? Why not just take a copy of the
original function and simply not run the function that normalizes the
number? It seems very odd to make a more limited version of the function
when it's already there.
Is it not possible to copy the code directly from utils/memory.rb in
facter?
Chris
On 30 June 2011 13:00, Martijn Grendelman <mart...@iphion.nl> wrote:
> On 30-06-11 11:20, Matthias Saou wrote:
> > Andreas Kuntzagk <andreas.kuntz...@mdc-berlin.de> wrote:
> >
> >> I want some config depending on memorysize.
> >>
> >> What I tried was
> >> if ($memorysize >= 256 * 1024*1024) {
> >> ...
> >> }
> >>
> >> But this fails because $memorysize is a string (and contains a "G")
> >> and can't be compared to an int.
> >>
> >> Are all facts strings? How do I work with numbers?
> >
> > Typical problem. Not to mention that you happen to have "G" but that
> > could very easily be "M". Here's my workaround for that, which I use
> > for calculations to then set some sysctl.conf values accordingly :
> >
> > # This is ugly, but very useful to get a standard kiB total RAM
> > # to base further calculations upon. Note that we get a string
> > $mem = inline_template("<%
> > mem,unit = scope.lookupvar('::memorysize').split
> > mem = mem.to_f
> > # Normalize mem to KiB
> > case unit
> > when nil: mem *= (1<<0)
> > when 'kB': mem *= (1<<10)
> > when 'MB': mem *= (1<<20)
> > when 'GB': mem *= (1<<30)
> > when 'TB': mem *= (1<<40)
> > end
> > %><%= mem.to_i %>")
>
> I use a custom fact, that returns the amount of system memory in
> megabytes. This is, however, Linux-only, since it uses /proc/meminfo:
>
> $ cat modules/common/lib/facter/memorysize_mb.rb
>
>
> require 'facter'
>
> Facter.add("memorysize_mb") do
> confine :kernel => :Linux
>
> ram = 0
>
> # Steal linux's meminfo
> File.open( "/proc/meminfo" , 'r' ) do |f|
> f.grep( /^MemTotal:/ ) { |mem|
> ram = mem.split( / +/ )[1].to_i / 1024
> }
> end
>
> setcode do
> ram
> end
> end
>
>
> > Here's an example of how I then use it :
> >
> > # kernel.shmmax
> > if $shmmax {
> > $shmmax_final = $shmmax
> > } else {
> > if $oracle {
> > # For non-shm half the RAM for <= 4G, 2G otherwise
> > if $mem <= 4294967296 {
> > $shmmax_final = $mem / 2
> > } else {
> > $shmmax_final = $mem - 2147483648
> > }
> > } else {
> > $shmmax_final = $mem
> > }
> > }
>
>
> Best regards,
> Martijn Grendelman
>
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