I think that's being worked on / beta. Until it's ready, we implemented
it in a daemon that is 49 lines of Perl. This particular implementation
is set to match our environment but you can modify it to your needs:
#!/usr/bin/perl
use Getopt::Long;
use lib 'lib';
use Linux::LVM;
my $lvname;
my $usage = "usage: $0 --lvname lvname\n";
die $usage unless ( GetOptions ( "lvname=s" => \$lvname ) );
die $usage unless ($lvname);
my $ppid = getppid();
while ( -e "/proc/$ppid") {
&check_snaps($lvname);
sleep(60);
}
sub check_snaps {
my $lvname = shift();
for ($snapnum = 2; $snapnum >= 0; $snapnum--) {
if (-e "/dev/clones/${lvname}_snap${snapnum}") {
my %lv = get_lv_info("/dev/clones/${lvname}_snap${snapnum}");
next unless ($lv{'lv_name'});
unless ($lv{'allocated_to_snapshot'}) {
system('lvremove', '-f', "clones/${lvname}_snap${snapnum}");
next;
}
if ($lv{'allocated_to_snapshot'} > 80) {
print "live extending ${lvname}_snap${snapnum}\n";
system('lvextend', '-f', '-l', '+20%LV', "clones/${lvname}_snap${snapnum}");
}
}
}
}
--
Ray Morris
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On Thu, 13 Oct 2011 10:28:56 -0700 (PDT)
Dusty Mabe <dustymabe@yahoo.com> wrote:
> Hi Everyone,
>
> I am interested to see if there is any support for automatically
> resizing an lvm snapshot when it becomes full or bypasses a certain
> utilization? There has been at least some interest in this in the
> past as I have found the following post in the mailman archives.
>
> http://www.redhat.com/archives/linux-lvm/2007-November/msg00016.html
>
>
> Also it looks like HP as performed at least a similar implementation
> of this type of feature in their own product.
>
> http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c02054539/c02054539.pdf
>
>
>
> Thanks for any Help!!
>
> Dusty Mabe
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
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