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sanoid
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#!/usr/bin/perl
# this software is licensed for use under the Free Software Foundation's GPL v3.0 license, as retrieved
# from http://www.gnu.org/licenses/gpl-3.0.html on 2014-11-17. A copy should also be available in this
# project's Git repository at https://github.com/jimsalterjrs/sanoid/blob/master/LICENSE.
$::VERSION = '2.1.0';
my $MINIMUM_DEFAULTS_VERSION = 2;
use strict;
use warnings;
use Config::IniFiles; # read samba-style conf file
use Data::Dumper; # debugging - print contents of hash
use File::Path 'make_path';
use Getopt::Long qw(:config auto_version auto_help);
use Pod::Usage; # pod2usage
use Time::Local; # to parse dates in reverse
use Capture::Tiny ':all';
my %args = (
"configdir" => "/etc/sanoid",
"cache-dir" => "/var/cache/sanoid",
"run-dir" => "/var/run/sanoid"
);
GetOptions(\%args, "verbose", "debug", "cron", "readonly", "quiet",
"configdir=s", "cache-dir=s", "run-dir=s",
"monitor-health", "force-update",
"monitor-snapshots", "take-snapshots", "prune-snapshots", "force-prune",
"monitor-capacity"
) or pod2usage(2);
# If only config directory (or nothing) has been specified, default to --cron --verbose
if (keys %args < 4) {
$args{'cron'} = 1;
$args{'verbose'} = 1;
}
# for compatibility reasons, older versions used hardcoded command paths
$ENV{'PATH'} = $ENV{'PATH'} . ":/bin:/sbin";
my $pscmd = 'ps';
my $zfs = 'zfs';
my $zpool = 'zpool';
my $conf_file = "$args{'configdir'}/sanoid.conf";
my $default_conf_file = "$args{'configdir'}/sanoid.defaults.conf";
# parse config file
my %config = init($conf_file,$default_conf_file);
my $cache_dir = $args{'cache-dir'};
my $run_dir = $args{'run-dir'};
make_path($cache_dir);
make_path($run_dir);
# if we call getsnaps(%config,1) it will forcibly update the cache, TTL or no TTL
my $forcecacheupdate = 0;
my $cache = "$cache_dir/snapshots.txt";
my $cacheTTL = 900; # 15 minutes
my %snaps = getsnaps( \%config, $cacheTTL, $forcecacheupdate );
my %pruned;
my %capacitycache;
my %snapsbytype = getsnapsbytype( \%config, \%snaps );
my %snapsbypath = getsnapsbypath( \%config, \%snaps );
# let's make it a little easier to be consistent passing these hashes in the same order to each sub
my @params = ( \%config, \%snaps, \%snapsbytype, \%snapsbypath );
if ($args{'debug'}) { $args{'verbose'}=1; blabber (@params); }
if ($args{'monitor-snapshots'}) { monitor_snapshots(@params); }
if ($args{'monitor-health'}) { monitor_health(@params); }
if ($args{'monitor-capacity'}) { monitor_capacity(@params); }
if ($args{'force-update'}) { my $snaps = getsnaps( \%config, $cacheTTL, 1 ); }
if ($args{'cron'}) {
if ($args{'quiet'}) { $args{'verbose'} = 0; }
take_snapshots (@params);
prune_snapshots (@params);
} else {
if ($args{'take-snapshots'}) { take_snapshots (@params); }
if ($args{'prune-snapshots'}) { prune_snapshots (@params); }
}
exit 0;
####################################################################################
####################################################################################
####################################################################################
sub monitor_health {
my ($config, $snaps, $snapsbytype, $snapsbypath) = @_;
my %pools;
my @messages;
my $errlevel=0;
foreach my $path (keys %{ $snapsbypath}) {
my @pool = split ('/',$path);
$pools{$pool[0]}=1;
}
foreach my $pool (keys %pools) {
my ($exitcode, $msg) = check_zpool($pool,2);
if ($exitcode > $errlevel) { $errlevel = $exitcode; }
chomp $msg;
push (@messages, $msg);
}
my @warninglevels = ('','*** WARNING *** ','*** CRITICAL *** ');
my $message = $warninglevels[$errlevel] . join (', ',@messages);
print "$message\n";
exit $errlevel;
}
####################################################################################
####################################################################################
####################################################################################
sub monitor_snapshots {
# nagios plugin format: exit 0,1,2,3 for OK, WARN, CRITICAL, or ERROR.
# check_snapshot_date - test ZFS fs creation timestamp for recentness
# accepts arguments: $filesystem, $warn (in seconds elapsed), $crit (in seconds elapsed)
my ($config, $snaps, $snapsbytype, $snapsbypath) = @_;
my %datestamp = get_date();
my $errlevel = 0;
my $msg;
my @msgs;
my @paths;
foreach my $section (keys %config) {
if ($section =~ /^template/) { next; }
if (! $config{$section}{'monitor'}) { next; }
if ($config{$section}{'process_children_only'}) { next; }
my $path = $config{$section}{'path'};
push @paths, $path;
my @types = ('yearly','monthly','weekly','daily','hourly','frequently');
foreach my $type (@types) {
if ($config{$section}{$type} == 0) { next; }
my $smallerperiod = 0;
# we need to set the period length in seconds first
if ($type eq 'frequently') { $smallerperiod = 1; }
elsif ($type eq 'hourly') { $smallerperiod = 60; }
elsif ($type eq 'daily') { $smallerperiod = 60*60; }
elsif ($type eq 'weekly') { $smallerperiod = 60*60*24; }
elsif ($type eq 'monthly') { $smallerperiod = 60*60*24*7; }
elsif ($type eq 'yearly') { $smallerperiod = 60*60*24*31; }
my $typewarn = $type . '_warn';
my $typecrit = $type . '_crit';
my $warn = convertTimePeriod($config{$section}{$typewarn}, $smallerperiod);
my $crit = convertTimePeriod($config{$section}{$typecrit}, $smallerperiod);
my $elapsed = -1;
if (defined $snapsbytype{$path}{$type}{'newest'}) {
$elapsed = $snapsbytype{$path}{$type}{'newest'};
}
my $dispelapsed = displaytime($elapsed);
my $dispwarn = displaytime($warn);
my $dispcrit = displaytime($crit);
if ( $elapsed > $crit || $elapsed == -1) {
if ($crit > 0) {
if (! $config{$section}{'monitor_dont_crit'}) { $errlevel = 2; }
if ($elapsed == -1) {
push @msgs, "CRIT: $path has no $type snapshots at all!";
} else {
push @msgs, "CRIT: $path newest $type snapshot is $dispelapsed old (should be < $dispcrit)";
}
}
} elsif ($elapsed > $warn) {
if ($warn > 0) {
if (! $config{$section}{'monitor_dont_warn'} && ($errlevel < 2) ) { $errlevel = 1; }
push @msgs, "WARN: $path newest $type snapshot is $dispelapsed old (should be < $dispwarn)";
}
} else {
# push @msgs .= "OK: $path newest $type snapshot is $dispelapsed old \n";
}
}
}
my @sorted_msgs = sort { lc($a) cmp lc($b) } @msgs;
my @sorted_paths = sort { lc($a) cmp lc($b) } @paths;
$msg = join (", ", @sorted_msgs);
my $paths = join (", ", @sorted_paths);
if ($msg eq '') { $msg = "OK: all monitored datasets \($paths\) have fresh snapshots"; }
print "$msg\n";
exit $errlevel;
}
####################################################################################
####################################################################################
####################################################################################
sub monitor_capacity {
my ($config, $snaps, $snapsbytype, $snapsbypath) = @_;
my %pools;
my @messages;
my $errlevel=0;
# build pool list with corresponding capacity limits
foreach my $section (keys %config) {
my @pool = split ('/',$section);
if (scalar @pool == 1 || !defined($pools{$pool[0]}) ) {
my %capacitylimits;
if (!check_capacity_limit($config{$section}{'capacity_warn'})) {
die "ERROR: invalid zpool capacity warning limit!\n";
}
if ($config{$section}{'capacity_warn'} != 0) {
$capacitylimits{'warn'} = $config{$section}{'capacity_warn'};
}
if (!check_capacity_limit($config{$section}{'capacity_crit'})) {
die "ERROR: invalid zpool capacity critical limit!\n";
}
if ($config{$section}{'capacity_crit'} != 0) {
$capacitylimits{'crit'} = $config{$section}{'capacity_crit'};
}
if (%capacitylimits) {
$pools{$pool[0]} = \%capacitylimits;
}
}
}
foreach my $pool (keys %pools) {
my $capacitylimitsref = $pools{$pool};
my ($exitcode, $msg) = check_zpool_capacity($pool,\%$capacitylimitsref);
if ($exitcode > $errlevel) { $errlevel = $exitcode; }
chomp $msg;
push (@messages, $msg);
}
my @warninglevels = ('','*** WARNING *** ','*** CRITICAL *** ');
my $message = $warninglevels[$errlevel] . join (', ',@messages);
print "$message\n";
exit $errlevel;
}
####################################################################################
####################################################################################
####################################################################################
sub prune_snapshots {
if ($args{'verbose'}) { print "INFO: pruning snapshots...\n"; }
my ($config, $snaps, $snapsbytype, $snapsbypath) = @_;
my %datestamp = get_date();
my $forcecacheupdate = 0;
foreach my $section (keys %config) {
if ($section =~ /^template/) { next; }
if (! $config{$section}{'autoprune'}) { next; }
if ($config{$section}{'process_children_only'}) { next; }
my $path = $config{$section}{'path'};
my $period = 0;
if (check_prune_defer($config, $section)) {
if ($args{'verbose'}) { print "INFO: deferring snapshot pruning ($section)...\n"; }
next;
}
foreach my $type (keys %{ $config{$section} }){
unless ($type =~ /ly$/) { next; }
# we need to set the period length in seconds first
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 'weekly') { $period = 60*60*24*7; }
elsif ($type eq 'monthly') { $period = 60*60*24*31; }
elsif ($type eq 'yearly') { $period = 60*60*24*365.25; }
# avoid pissing off use warnings by not executing this block if no matching snaps exist
if (defined $snapsbytype{$path}{$type}{'sorted'}) {
my @sorted = split (/\|/,$snapsbytype{$path}{$type}{'sorted'});
# if we say "daily=30" we really mean "don't keep any dailies more than 30 days old", etc
my $maxage = ( time() - $config{$section}{$type} * $period );
# but if we say "daily=30" we ALSO mean "don't get rid of ANY dailies unless we have more than 30".
my $minsnapsthistype = $config{$section}{$type};
# how many total snaps of this type do we currently have?
my $numsnapsthistype = scalar (@sorted);
my @prunesnaps;
foreach my $snap( @sorted ){
# print "snap $path\@$snap has age $snaps{$path}{$snap}{'ctime'}, maxage is $maxage.\n";
if ( ($snaps{$path}{$snap}{'ctime'} < $maxage) && ($numsnapsthistype > $minsnapsthistype) ) {
my $fullpath = $path . '@' . $snap;
push(@prunesnaps,$fullpath);
# we just got rid of a snap, so we now have one fewer, duh
$numsnapsthistype--;
}
}
if ((scalar @prunesnaps) > 0) {
# print "found some snaps to prune!\n"
if (checklock('sanoid_pruning')) {
writelock('sanoid_pruning');
foreach my $snap( @prunesnaps ){
my $dataset = (split '@', $snap)[0];
my $snapname = (split '@', $snap)[1];
if (! $args{'readonly'} && $config{$dataset}{'pre_pruning_script'}) {
$ENV{'SANOID_TARGET'} = $dataset;
$ENV{'SANOID_SNAPNAME'} = $snapname;
if ($args{'verbose'}) { print "executing pre_pruning_script '".$config{$dataset}{'pre_pruning_script'}."' on dataset '$dataset'\n"; }
my $ret = runscript('pre_pruning_script', $dataset);
delete $ENV{'SANOID_TARGET'};
delete $ENV{'SANOID_SNAPNAME'};
if ($ret != 0) {
# warning was already thrown by runscript function
# skip pruning if pre snapshot script returns non zero exit code
next;
}
}
if ($args{'verbose'}) { print "INFO: pruning $snap ... \n"; }
if (!$args{'force-prune'} && iszfsbusy($path)) {
if ($args{'verbose'}) { print "INFO: deferring pruning of $snap - $path is currently in zfs send or receive.\n"; }
} else {
if (! $args{'readonly'}) {
if (system($zfs, "destroy", $snap) == 0) {
$pruned{$snap} = 1;
if ($config{$dataset}{'pruning_script'}) {
$ENV{'SANOID_TARGET'} = $dataset;
$ENV{'SANOID_SNAPNAME'} = $snapname;
$ENV{'SANOID_SCRIPT'} = 'prune';
if ($args{'verbose'}) { print "executing pruning_script '".$config{$dataset}{'pruning_script'}."' on dataset '$dataset'\n"; }
my $ret = runscript('pruning_script',$dataset);
delete $ENV{'SANOID_TARGET'};
delete $ENV{'SANOID_SNAPNAME'};
delete $ENV{'SANOID_SCRIPT'};
}
} else {
warn "could not remove $snap : $?";
}
}
}
}
removelock('sanoid_pruning');
removecachedsnapshots(0);
} else {
if ($args{'verbose'}) { print "INFO: deferring snapshot pruning - valid pruning lock held by other sanoid process.\n"; }
}
}
}
}
}
# if there were any deferred cache updates,
# do them now and wait if necessary
removecachedsnapshots(1);
} # end prune_snapshots
####################################################################################
####################################################################################
####################################################################################
sub take_snapshots {
my ($config, $snaps, $snapsbytype, $snapsbypath) = @_;
my %datestamp = get_date();
my $forcecacheupdate = 0;
my %newsnapsgroup;
# get utc timestamp of the current day for DST check
my $daystartUtc = timelocal(0, 0, 0, $datestamp{'mday'}, ($datestamp{'mon'}-1), $datestamp{'year'});
my ($isdst) = (localtime($daystartUtc))[8];
my $dstOffset = 0;
if ($isdst ne $datestamp{'isdst'}) {
# current dst is different then at the beginning og the day
if ($isdst) {
# DST ended in the current day
$dstOffset = 60*60;
}
}
if ($args{'verbose'}) { print "INFO: taking snapshots...\n"; }
foreach my $section (keys %config) {
if ($section =~ /^template/) { next; }
if (! $config{$section}{'autosnap'}) { next; }
if ($config{$section}{'process_children_only'}) { next; }
my $path = $config{$section}{'path'};
my @types = ('yearly','monthly','weekly','daily','hourly','frequently');
foreach my $type (@types) {
if ($config{$section}{$type} > 0) {
my $newestage; # in seconds
if (defined $snapsbytype{$path}{$type}{'newest'}) {
$newestage = $snapsbytype{$path}{$type}{'newest'};
} else{
$newestage = 9999999999999999;
}
# for use with localtime: @preferredtime will be most recent preferred snapshot time in ($sec,$min,$hour,$mon-1,$year) format
my @preferredtime;
my $lastpreferred;
# to avoid duplicates with DST
my $handleDst = 0;
if ($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'};
push @preferredtime,$datestamp{'mday'};
push @preferredtime,($datestamp{'mon'}-1); # january is month 0
push @preferredtime,$datestamp{'year'};
$lastpreferred = timelocal(@preferredtime);
if ($dstOffset ne 0) {
# timelocal doesn't take DST into account
$lastpreferred += $dstOffset;
# DST ended, avoid duplicates
$handleDst = 1;
}
if ($lastpreferred > time()) { $lastpreferred -= 60*60; } # preferred time is later this hour - so look at last hour's
} elsif ($type eq 'daily') {
push @preferredtime,0; # try to hit 0 seconds
push @preferredtime,$config{$section}{'daily_min'};
push @preferredtime,$config{$section}{'daily_hour'};
push @preferredtime,$datestamp{'mday'};
push @preferredtime,($datestamp{'mon'}-1); # january is month 0
push @preferredtime,$datestamp{'year'};
$lastpreferred = timelocal(@preferredtime);
# timelocal doesn't take DST into account
$lastpreferred += $dstOffset;
# check if the planned time has different DST flag than the current
my ($isdst) = (localtime($lastpreferred))[8];
if ($isdst ne $datestamp{'isdst'}) {
if (!$isdst) {
# correct DST difference
$lastpreferred -= 60*60;
}
}
if ($lastpreferred > time()) {
$lastpreferred -= 60*60*24;
if ($dstOffset ne 0) {
# because we are going back one day
# the DST difference has to be accounted
# for in reverse now
$lastpreferred -= 2*$dstOffset;
}
} # preferred time is later today - so look at yesterday's
} elsif ($type eq 'weekly') {
# calculate offset in seconds for the desired weekday
my $offset = 0;
if ($config{$section}{'weekly_wday'} < $datestamp{'wday'}) {
$offset += 7;
}
$offset += $config{$section}{'weekly_wday'} - $datestamp{'wday'};
$offset *= 60*60*24; # full day
push @preferredtime,0; # try to hit 0 seconds
push @preferredtime,$config{$section}{'weekly_min'};
push @preferredtime,$config{$section}{'weekly_hour'};
push @preferredtime,$datestamp{'mday'};
push @preferredtime,($datestamp{'mon'}-1); # january is month 0
push @preferredtime,$datestamp{'year'};
$lastpreferred = timelocal(@preferredtime);
$lastpreferred += $offset;
if ($lastpreferred > time()) { $lastpreferred -= 60*60*24*7; } # preferred time is later this week - so look at last week's
} elsif ($type eq 'monthly') {
push @preferredtime,0; # try to hit 0 seconds
push @preferredtime,$config{$section}{'monthly_min'};
push @preferredtime,$config{$section}{'monthly_hour'};
push @preferredtime,$config{$section}{'monthly_mday'};
push @preferredtime,($datestamp{'mon'}-1); # january is month 0
push @preferredtime,$datestamp{'year'};
$lastpreferred = timelocal(@preferredtime);
if ($lastpreferred > time()) { $lastpreferred -= 60*60*24*31; } # preferred time is later this month - so look at last month's
} elsif ($type eq 'yearly') {
push @preferredtime,0; # try to hit 0 seconds
push @preferredtime,$config{$section}{'yearly_min'};
push @preferredtime,$config{$section}{'yearly_hour'};
push @preferredtime,$config{$section}{'yearly_mday'};
push @preferredtime,($config{$section}{'yearly_mon'}-1); # january is month 0
push @preferredtime,$datestamp{'year'};
$lastpreferred = timelocal(@preferredtime);
if ($lastpreferred > time()) { $lastpreferred -= 60*60*24*31*365.25; } # preferred time is later this year - so look at last year
} else {
warn "WARN: unknown interval type $type in config!";
next;
}
# reconstruct our human-formatted most recent preferred snapshot time into an epoch time, to compare with the epoch of our most recent snapshot
my $maxage = time()-$lastpreferred;
if ( $newestage > $maxage ) {
# print "we should have had a $type snapshot of $path $maxage seconds ago; most recent is $newestage seconds old.\n";
if (!exists $newsnapsgroup{$path}) {
$newsnapsgroup{$path} = {
'recursive' => $config{$section}{'zfs_recursion'},
'handleDst' => $handleDst,
'datasets' => [$path], # for later atomic grouping, currently only a one element array
'types' => []
};
}
push(@{$newsnapsgroup{$path}{'types'}}, $type);
}
}
}
}
if (%newsnapsgroup) {
while ((my $path, my $snapData) = each(%newsnapsgroup)) {
my $recursiveFlag = $snapData->{recursive};
my $dstHandling = $snapData->{handleDst};
my @datasets = @{$snapData->{datasets}};
my $dataset = $datasets[0];
my @types = @{$snapData->{types}};
# same timestamp for all snapshots types (daily, hourly, ...)
my %datestamp = get_date();
my @snapshots;
foreach my $type (@types) {
my $snapname = "autosnap_$datestamp{'sortable'}_$type";
push(@snapshots, $snapname);
}
my $datasetString = join(",", @datasets);
my $typeString = join(",", @types);
my $snapshotString = join(",", @snapshots);
my $extraMessage = "";
if ($recursiveFlag) {
$extraMessage = " (zfs recursive)";
}
my $presnapshotfailure = 0;
my $ret = 0;
if ($config{$dataset}{'pre_snapshot_script'}) {
$ENV{'SANOID_TARGET'} = $dataset;
$ENV{'SANOID_TARGETS'} = $datasetString;
$ENV{'SANOID_SNAPNAME'} = $snapshots[0];
$ENV{'SANOID_SNAPNAMES'} = $snapshotString;
$ENV{'SANOID_TYPES'} = $typeString;
$ENV{'SANOID_SCRIPT'} = 'pre';
if ($args{'verbose'}) { print "executing pre_snapshot_script '".$config{$dataset}{'pre_snapshot_script'}."' on dataset '$dataset'\n"; }
if (!$args{'readonly'}) {
$ret = runscript('pre_snapshot_script',$dataset);
}
delete $ENV{'SANOID_TARGET'};
delete $ENV{'SANOID_TARGETS'};
delete $ENV{'SANOID_SNAPNAME'};
delete $ENV{'SANOID_SNAPNAMES'};
delete $ENV{'SANOID_TYPES'};
delete $ENV{'SANOID_SCRIPT'};
if ($ret != 0) {
# warning was already thrown by runscript function
$config{$dataset}{'no_inconsistent_snapshot'} and next;
$presnapshotfailure = 1;
}
}
foreach my $snap (@snapshots) {
$snap = "$dataset\@$snap";
if ($args{'verbose'}) { print "taking snapshot $snap$extraMessage\n"; }
if (!$args{'readonly'}) {
my $stderr;
my $exit;
($stderr, $exit) = tee_stderr {
if ($recursiveFlag) {
system($zfs, "snapshot", "-r", "$snap");
} else {
system($zfs, "snapshot", "$snap");
}
};
$exit == 0 or do {
if ($dstHandling) {
if ($stderr =~ /already exists/) {
$exit = 0;
$snap =~ s/_([a-z]+)$/dst_$1/g;
if ($args{'verbose'}) { print "taking dst snapshot $snap$extraMessage\n"; }
if ($recursiveFlag) {
system($zfs, "snapshot", "-r", "$snap") == 0
or warn "CRITICAL ERROR: $zfs snapshot -r $snap failed, $?";
} else {
system($zfs, "snapshot", "$snap") == 0
or warn "CRITICAL ERROR: $zfs snapshot $snap failed, $?";
}
}
}
};
$exit == 0 or do {
if ($recursiveFlag) {
warn "CRITICAL ERROR: $zfs snapshot -r $snap failed, $?";
} else {
warn "CRITICAL ERROR: $zfs snapshot $snap failed, $?";
}
};
}
}
if ($config{$dataset}{'post_snapshot_script'}) {
if (!$presnapshotfailure or $config{$dataset}{'force_post_snapshot_script'}) {
$ENV{'SANOID_TARGET'} = $dataset;
$ENV{'SANOID_TARGETS'} = $datasetString;
$ENV{'SANOID_SNAPNAME'} = $snapshots[0];
$ENV{'SANOID_SNAPNAMES'} = $snapshotString;
$ENV{'SANOID_TYPES'} = $typeString;
$ENV{'SANOID_SCRIPT'} = 'post';
$ENV{'SANOID_PRE_FAILURE'} = $presnapshotfailure;
if ($args{'verbose'}) { print "executing post_snapshot_script '".$config{$dataset}{'post_snapshot_script'}."' on dataset '$dataset'\n"; }
if (!$args{'readonly'}) {
runscript('post_snapshot_script',$dataset);
}
delete $ENV{'SANOID_TARGET'};
delete $ENV{'SANOID_TARGETS'};
delete $ENV{'SANOID_SNAPNAME'};
delete $ENV{'SANOID_SNAPNAMES'};
delete $ENV{'SANOID_TYPES'};
delete $ENV{'SANOID_SCRIPT'};
delete $ENV{'SANOID_PRE_FAILURE'};
}
}
}
$forcecacheupdate = 1;
%snaps = getsnaps(%config,$cacheTTL,$forcecacheupdate);
}
}
####################################################################################
####################################################################################
####################################################################################
sub blabber {
my ($config, $snaps, $snapsbytype, $snapsbypath) = @_;
$Data::Dumper::Sortkeys = 1;
print "****** CONFIGS ******\n";
print Dumper(\%config);
#print "****** SNAPSHOTS ******\n";
#print Dumper(\%snaps);
#print "****** SNAPSBYTYPE ******\n";
#print Dumper(\%snapsbytype);
#print "****** SNAPSBYPATH ******\n";
#print Dumper(\%snapsbypath);
print "\n";
foreach my $section (keys %config) {
my $path = $config{$section}{'path'};
print "Filesystem $path has:\n";
print " $snapsbypath{$path}{'numsnaps'} total snapshots ";
if ($snapsbypath{$path}{'numsnaps'} == 0) {
print "(no current snapshots)"
} else {
print "(newest: ";
my $newest = sprintf("%.1f",$snapsbypath{$path}{'newest'} / 60 / 60);
print "$newest hours old)\n";
foreach my $type (keys %{ $snapsbytype{$path} }){
print " $snapsbytype{$path}{$type}{'numsnaps'} $type\n";
print " desired: $config{$section}{$type}\n";
print " newest: ";
my $newest = sprintf("%.1f",($snapsbytype{$path}{$type}{'newest'} / 60 / 60));
print "$newest hours old, named $snapsbytype{$path}{$type}{'newestname'}\n";
}
}
print "\n\n";
}
} # end blabber
####################################################################################
####################################################################################
####################################################################################
sub getsnapsbytype {
my ($config, $snaps) = @_;
my %snapsbytype;
# iterate through each module section - each section is a single ZFS path
foreach my $section (keys %config) {
my $path = $config{$section}{'path'};
my %rawsnaps;
foreach my $name (keys %{ $snaps{$path} }){
my $type = $snaps{$path}{$name}{'type'};
$rawsnaps{$type}{$name} = $snaps{$path}{$name}{'ctime'}
}
# iterate through snapshots of each type, ordered by creation time of each snapshot within that type
foreach my $type (keys %rawsnaps) {
$snapsbytype{$path}{$type}{'numsnaps'} = scalar (keys %{ $rawsnaps{$type} });
my @sortedsnaps;
foreach my $name (
sort { $rawsnaps{$type}{$a} <=> $rawsnaps{$type}{$b} } keys %{ $rawsnaps{$type} }
) {
push @sortedsnaps, $name;
$snapsbytype{$path}{$type}{'newest'} = (time-$snaps{$path}{$name}{'ctime'});
$snapsbytype{$path}{$type}{'newestname'} = $name;
}
$snapsbytype{$path}{$type}{'sorted'} = join ('|',@sortedsnaps);
}
}
return %snapsbytype;
} # end getsnapsbytype
####################################################################################
####################################################################################
####################################################################################
sub getsnapsbypath {
my ($config,$snaps) = @_;
my %snapsbypath;
# iterate through each module section - each section is a single ZFS path
foreach my $section (keys %config) {
my $path = $config{$section}{'path'};
$snapsbypath{$path}{'numsnaps'} = scalar (keys %{ $snaps{$path} });
# iterate through snapshots of each type, ordered by creation time of each snapshot within that type
my %rawsnaps;
foreach my $snapname ( keys %{ $snaps{$path} } ) {
$rawsnaps{$path}{$snapname} = $snaps{$path}{$snapname}{'ctime'};
}
my @sortedsnaps;
foreach my $snapname (
sort { $rawsnaps{$path}{$a} <=> $rawsnaps{$path}{$b} } keys %{ $rawsnaps{$path} }
) {
push @sortedsnaps, $snapname;
$snapsbypath{$path}{'newest'} = (time-$snaps{$path}{$snapname}{'ctime'});
}
my $sortedsnaps = join ('|',@sortedsnaps);
$snapsbypath{$path}{'sorted'} = $sortedsnaps;
}
return %snapsbypath;
} # end getsnapsbypath
####################################################################################
####################################################################################
####################################################################################
sub getsnaps {
my ($config, $cacheTTL, $forcecacheupdate) = @_;
my @rawsnaps;
my ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size, $atime, $mtime, $ctime, $blksize, $blocks) = stat($cache);
if ( $forcecacheupdate || ! -f $cache || (time() - $mtime) > $cacheTTL ) {
if (checklock('sanoid_cacheupdate')) {
writelock('sanoid_cacheupdate');
if ($args{'verbose'}) {
if ($args{'force-update'}) {
print "INFO: cache forcibly expired - updating from zfs list.\n";
} else {
print "INFO: cache expired - updating from zfs list.\n";
}
}
open FH, "$zfs get -Hrpt snapshot creation |";
@rawsnaps = <FH>;
close FH;
open FH, "> $cache" or die 'Could not write to $cache!\n';
print FH @rawsnaps;
close FH;
removelock('sanoid_cacheupdate');
} else {
if ($args{'verbose'}) { print "INFO: deferring cache update - valid cache update lock held by another sanoid process.\n"; }
open FH, "< $cache";
@rawsnaps = <FH>;
close FH;
}
} else {
# if ($args{'debug'}) { print "DEBUG: cache not expired (" . (time() - $mtime) . " seconds old with TTL of $cacheTTL): pulling snapshot list from cache.\n"; }
open FH, "< $cache";
@rawsnaps = <FH>;
close FH;
}
foreach my $snap (@rawsnaps) {
my ($fs,$snapname,$snapdate) = ($snap =~ m/(.*)\@(.*ly)\t*creation\t*(\d*)/);
# avoid pissing off use warnings
if (defined $snapname) {
my ($snaptype) = ($snapname =~ m/.*_(\w*ly)/);
if ($snapname =~ /^autosnap/) {
$snaps{$fs}{$snapname}{'ctime'}=$snapdate;
$snaps{$fs}{$snapname}{'type'}=$snaptype;
}
}
}
return %snaps;
}
####################################################################################
####################################################################################
####################################################################################
sub init {
my ($conf_file, $default_conf_file) = @_;
my %config;
unless (-e $default_conf_file ) { die "FATAL: cannot load $default_conf_file - please restore a clean copy, this is not a user-editable file!"; }
unless (-e $conf_file ) { die "FATAL: cannot load $conf_file - please create a valid local config file before running sanoid!"; }
tie my %defaults, 'Config::IniFiles', ( -file => $default_conf_file ) or die "FATAL: cannot load $default_conf_file - please restore a clean copy, this is not a user-editable file!";
tie my %ini, 'Config::IniFiles', ( -file => $conf_file ) or die "FATAL: cannot load $conf_file - please create a valid local config file before running sanoid!";
# we'll use these later to normalize potentially true and false values on any toggle keys
my @toggles = ('autosnap','autoprune','monitor_dont_warn','monitor_dont_crit','monitor','recursive','process_children_only','skip_children','no_inconsistent_snapshot','force_post_snapshot_script');
# recursive is defined as toggle but can also have the special value "zfs", it is kept to be backward compatible
my @istrue=(1,"true","True","TRUE","yes","Yes","YES","on","On","ON");
my @isfalse=(0,"false","False","FALSE","no","No","NO","off","Off","OFF");
# check if default configuration file is up to date
my $defaults_version = 1;
if (defined $defaults{'version'}{'version'}) {
$defaults_version = $defaults{'version'}{'version'};
delete $defaults{'version'};
}
if ($defaults_version < $MINIMUM_DEFAULTS_VERSION) {
die "FATAL: you're using sanoid.defaults.conf v$defaults_version, this version of sanoid requires a minimum sanoid.defaults.conf v$MINIMUM_DEFAULTS_VERSION";
}
foreach my $section (keys %ini) {
# first up - die with honor if unknown parameters are set in any modules or templates by the user.
foreach my $key (keys %{$ini{$section}}) {
if (! defined ($defaults{'template_default'}{$key})) {
die "FATAL ERROR: I don't understand the setting $key you've set in \[$section\] in $conf_file.\n";
}
# in case of duplicate lines we will end up with an array of all values
my $value = $ini{$section}{$key};
if (ref($value) eq 'ARRAY') {
warn "duplicate key '$key' in section '$section', using the value from the first occurence and ignoring the others.\n";
$ini{$section}{$key} = $value->[0];
}
}
if ($section =~ /^template_/) { next; } # don't process templates directly
# only set defaults on sections that haven't already been initialized - this allows us to override values
# for sections directly when they've already been defined recursively, without starting them over from scratch.
if (! defined ($config{$section}{'initialized'})) {
if ($args{'debug'}) { print "DEBUG: initializing \$config\{$section\} with default values from $default_conf_file.\n"; }
# set default values from %defaults, which can then be overridden by template
# and/or local settings within the module.
foreach my $key (keys %{$defaults{'template_default'}}) {
if (! ($key =~ /template|recursive|children_only/)) {
$config{$section}{$key} = $defaults{'template_default'}{$key};
}
}
# override with values from user-defined default template, if any
foreach my $key (keys %{$ini{'template_default'}}) {
if ($key =~ /template|recursive/) {
warn "ignored key '$key' from user-defined default template.\n";
next;
}
if ($args{'debug'}) { print "DEBUG: overriding $key on $section with value from user-defined default template.\n"; }
$config{$section}{$key} = $ini{'template_default'}{$key};
}
}
# override with values from user-defined templates applied to this module,
# in the order they were specified (ie use_template = default,production,mytemplate)
if (defined $ini{$section}{'use_template'}) {
my @templates = split (' *, *',$ini{$section}{'use_template'});
foreach my $rawtemplate (@templates) {
# strip trailing whitespace
$rawtemplate =~ s/\s+$//g;
my $template = 'template_'.$rawtemplate;
foreach my $key (keys %{$ini{$template}}) {
if ($key =~ /template|recursive/) {
warn "ignored key '$key' from '$rawtemplate' template.\n";
next;
}
if ($args{'debug'}) { print "DEBUG: overriding $key on $section with value from user-defined template $template.\n"; }
$config{$section}{$key} = $ini{$template}{$key};
}
}
}
# override with any locally set values in the module itself
foreach my $key (keys %{$ini{$section}} ) {
if (! ($key =~ /template|recursive|skip_children/)) {
if ($args{'debug'}) { print "DEBUG: overriding $key on $section with value directly set in module.\n"; }
$config{$section}{$key} = $ini{$section}{$key};
}
}
# make sure that true values are true and false values are false for any toggled values
foreach my $toggle(@toggles) {
foreach my $true (@istrue) {
if (defined $config{$section}{$toggle} && $config{$section}{$toggle} eq $true) { $config{$section}{$toggle} = 1; }
}
foreach my $false (@isfalse) {
if (defined $config{$section}{$toggle} && $config{$section}{$toggle} eq $false) { $config{$section}{$toggle} = 0; }
}
}
# section path is the section name, unless section path has been explicitly defined
if (defined ($ini{$section}{'path'})) {
$config{$section}{'path'} = $ini{$section}{'path'};
} else {
$config{$section}{'path'} = $section;
}
# how 'bout some recursion? =)
if ($config{$section}{'zfs_recursion'} && $config{$section}{'zfs_recursion'} == 1 && $config{$section}{'autosnap'} == 1) {
warn "ignored autosnap configuration for '$section' because it's part of a zfs recursion.\n";
$config{$section}{'autosnap'} = 0;
}
my $recursive = $ini{$section}{'recursive'} && grep( /^$ini{$section}{'recursive'}$/, @istrue );
my $zfsRecursive = $ini{$section}{'recursive'} && $ini{$section}{'recursive'} =~ /zfs/i;
my $skipChildren = $ini{$section}{'skip_children'} && grep( /^$ini{$section}{'skip_children'}$/, @istrue );
my @datasets;
if ($zfsRecursive || $recursive || $skipChildren) {
if ($zfsRecursive) {
$config{$section}{'zfs_recursion'} = 1;
}
@datasets = getchilddatasets($config{$section}{'path'});
DATASETS: foreach my $dataset(@datasets) {
chomp $dataset;
if ($zfsRecursive) {