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implemented frequent snapshots with configurable period 

Fixes #75
This commit is contained in:
Christoph Klaffl 2017-11-07 08:03:53 +01:00
parent 09a879664a
commit d8613d1379
3 changed files with 26 additions and 4 deletions
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21
sanoid
View File

@ -121,12 +121,13 @@ sub monitor_snapshots {
my $path = $config{$section}{'path'};
push @paths, $path;
my @types = ('yearly','monthly','daily','hourly');
my @types = ('yearly','monthly','daily','hourly','frequently');
foreach my $type (@types) {
my $smallerperiod = 0;
# we need to set the period length in seconds first
if ($type eq 'hourly') { $smallerperiod = 60; }
if ($type eq 'frequently') { $smallerperiod = 1; }
elsif ($type eq 'hourly') { $smallerperiod = 60; }
elsif ($type eq 'daily') { $smallerperiod = 60*60; }
elsif ($type eq 'monthly') { $smallerperiod = 60*60*24; }
elsif ($type eq 'yearly') { $smallerperiod = 60*60*24; }
@ -200,7 +201,8 @@ sub prune_snapshots {
unless ($type =~ /ly$/) { next; }
# we need to set the period length in seconds first
if ($type eq 'hourly') { $period = 60*60; }
if ($type eq 'frequently') { $period = 60 * $config{$section}{'frequent_period'}; }
elsif ($type eq 'hourly') { $period = 60*60; }
elsif ($type eq 'daily') { $period = 60*60*24; }
elsif ($type eq 'monthly') { $period = 60*60*24*31; }
elsif ($type eq 'yearly') { $period = 60*60*24*365.25; }
@ -291,7 +293,18 @@ sub take_snapshots {
my @preferredtime;
my $lastpreferred;
if ($type eq 'hourly') {
if ($type eq 'frequently') {
my $frequentslice = int($datestamp{'min'} / $config{$section}{'frequent_period'});
push @preferredtime,0; # try to hit 0 seconds
push @preferredtime,$frequentslice * $config{$section}{'frequent_period'};
push @preferredtime,$datestamp{'hour'};
push @preferredtime,$datestamp{'mday'};
push @preferredtime,($datestamp{'mon'}-1); # january is month 0
push @preferredtime,$datestamp{'year'};
$lastpreferred = timelocal(@preferredtime);
if ($lastpreferred > time()) { $lastpreferred -= 60 * $config{$section}{'frequent_period'}; } # preferred time is later this frequent period - so look at last frequent period
} elsif ($type eq 'hourly') {
push @preferredtime,0; # try to hit 0 seconds
push @preferredtime,$config{$section}{'hourly_min'};
push @preferredtime,$datestamp{'hour'};

2
sanoid.conf
View File

@ -40,6 +40,7 @@
daily = 60
[template_production]
frequently = 0
hourly = 36
daily = 30
monthly = 3
@ -49,6 +50,7 @@
[template_backup]
autoprune = yes
frequently = 0
hourly = 30
daily = 90
monthly = 12

7
sanoid.defaults.conf
View File

@ -16,12 +16,17 @@ recursive =
use_template =
process_children_only =
# The period in minutes for frequent snapshots,
# should be in the range of 1-30 and divide an hour without remainder
frequent_period = 15
# If any snapshot type is set to 0, we will not take snapshots for it - and will immediately
# prune any of those type snapshots already present.
#
# Otherwise, if autoprune is set, we will prune any snapshots of that type which are older
# than (setting * periodicity) - so if daily = 90, we'll prune any dailies older than 90 days.
autoprune = yes
frequently = 0
hourly = 48
daily = 90
monthly = 6
@ -62,6 +67,8 @@ yearly_min = 0
monitor = yes
monitor_dont_warn = no
monitor_dont_crit = no
frequently_warn = 2000
frequently_crit = 8000
hourly_warn = 90
hourly_crit = 360
daily_warn = 28