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mysql_zbx_part.pl
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mysql_zbx_part.pl
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#!/usr/bin/perl
use strict;
use DBI;
use Sys::Syslog qw(:standard :macros);
use DateTime;
openlog("mysql_zbx_part", "ndelay,pid", LOG_LOCAL0);
my $db_schema = 'zabbix';
my $dsn = 'DBI:mysql:'.$db_schema.':mysql_socket=/var/lib/mysql/mysql.sock';
my $db_user_name = 'zabbix';
my $db_password = 'password';
my $tables = { 'history' => { 'period' => 'day', 'keep_history' => '60'},
'history_log' => { 'period' => 'day', 'keep_history' => '60'},
'history_str' => { 'period' => 'day', 'keep_history' => '60'},
'history_text' => { 'period' => 'day', 'keep_history' => '60'},
'history_uint' => { 'period' => 'day', 'keep_history' => '60'},
'trends' => { 'period' => 'month', 'keep_history' => '12'},
'trends_uint' => { 'period' => 'month', 'keep_history' => '12'},
# comment next 5 lines if you partition zabbix database starting from 2.2
# they usually used for zabbix database before 2.2
# 'acknowledges' => { 'period' => 'month', 'keep_history' => '23'},
# 'alerts' => { 'period' => 'month', 'keep_history' => '6'},
# 'auditlog' => { 'period' => 'month', 'keep_history' => '24'},
# 'events' => { 'period' => 'month', 'keep_history' => '12'},
# 'service_alarms' => { 'period' => 'month', 'keep_history' => '6'},
};
my $amount_partitions = 10;
my $curr_tz = 'Etc/UTC';
# name templates for the different periods
my $partition_name_templates = { 'day' => 'p%Y_%m_%d',
'week' => 'p%Y_w%W',
'month' => 'p%Y_%m',
};
my $part_tables;
my $dbh = DBI->connect($dsn, $db_user_name, $db_password);
unless ( check_have_partition() ) {
print "Your installation of MySQL does not support table partitioning.\n";
syslog(LOG_CRIT, 'Your installation of MySQL does not support table partitioning.');
exit 1;
}
my $sth = $dbh->prepare(qq{SELECT table_name as table_name, partition_name as partition_name,
lower(partition_method) as partition_method,
rtrim(ltrim(partition_expression)) as partition_expression,
partition_description as partition_description, table_rows
FROM information_schema.partitions
WHERE partition_name IS NOT NULL AND table_schema = ?});
$sth->execute($db_schema);
while (my $row = $sth->fetchrow_hashref()) {
$part_tables->{$row->{'table_name'}}->{$row->{'partition_name'}} = $row;
}
$sth->finish();
foreach my $key (sort keys %{$tables}) {
unless (defined($part_tables->{$key})) {
syslog(LOG_ERR, 'Partitioning for "'.$key.'" is not found! The table might be not partitioned.');
next;
}
create_next_partition($key, $part_tables->{$key}, $tables->{$key}->{'period'});
remove_old_partitions($key, $part_tables->{$key}, $tables->{$key}->{'period'}, $tables->{$key}->{'keep_history'})
}
delete_old_data();
$dbh->disconnect();
sub check_have_partition {
# MySQL 5.5
# #my $sth = $dbh->prepare(qq{SELECT variable_value FROM information_schema.global_variables WHERE variable_name = 'have_partitioning'});
#return 1 if $row eq 'YES';
#
# End of Mysql 5.5
# MySQL 5.6 + MariaDB
my $sth = $dbh->prepare(qq{SELECT plugin_status FROM information_schema.plugins WHERE plugin_name = 'partition'});
$sth->execute();
my $row = $sth->fetchrow_array();
$sth->finish();
return 1 if $row eq 'ACTIVE';
# End of MySQL 5.6 + MariaDB
# MySQL 8.x (NOT MariaDB!)
# my $sth = $dbh->prepare(qq{select version();});
# $sth->execute();
# my $row = $sth->fetchrow_array();
# $sth->finish();
# return 1 if $row >= 8;
#
# End of MySQL 8.x
# Do not uncomment last }
}
sub create_next_partition {
my $table_name = shift;
my $table_part = shift;
my $period = shift;
for (my $curr_part = 0; $curr_part < $amount_partitions; $curr_part++) {
my $next_name = name_next_part($period, $curr_part);
if (grep { $_ eq $next_name } keys %{$table_part}) {
syslog(LOG_INFO, "Next partition for $table_name table has already been created. It is $next_name");
}
else {
syslog(LOG_INFO, "Creating a partition for $table_name table ($next_name)");
my $query = 'ALTER TABLE '."$db_schema.$table_name".' ADD PARTITION (PARTITION '.$next_name.
' VALUES less than (UNIX_TIMESTAMP("'.date_next_part($period, $curr_part).'") div 1))';
syslog(LOG_DEBUG, $query);
$dbh->do($query);
}
}
}
sub remove_old_partitions {
my $table_name = shift;
my $table_part = shift;
my $period = shift;
my $keep_history = shift;
my $curr_date = DateTime->now( time_zone => $curr_tz );
$curr_date->subtract($period.'s' => $keep_history);
$curr_date->truncate(to => $period);
foreach my $partition (sort keys %{$table_part}) {
if ($table_part->{$partition}->{'partition_description'} <= $curr_date->epoch) {
syslog(LOG_INFO, "Removing old $partition partition from $table_name table");
my $query = "ALTER TABLE $db_schema.$table_name DROP PARTITION $partition";
syslog(LOG_DEBUG, $query);
$dbh->do($query);
}
}
}
sub name_next_part {
my $period = shift;
my $curr_part = shift;
unless (defined $partition_name_templates->{$period}) {
die "unsupported partitioning period '$period'\n";
}
my $curr_date = DateTime->now( time_zone => $curr_tz );
$curr_date->truncate( to => $period );
$curr_date->add( $period.'s' => $curr_part );
return $curr_date->strftime($partition_name_templates->{$period});
}
sub date_next_part {
my $period = shift;
my $curr_part = shift;
my $curr_date = DateTime->now( time_zone => $curr_tz );
$curr_date->truncate( to => $period );
$curr_date->add( $period.'s' => 1 + $curr_part );
return $curr_date->strftime('%Y-%m-%d');
}
sub delete_old_data {
$dbh->do("DELETE FROM sessions WHERE lastaccess < UNIX_TIMESTAMP(NOW() - INTERVAL 1 MONTH)");
$dbh->do("TRUNCATE housekeeper");
# Uncomment the following line for Zabbix 5.4 and earlier
# $dbh->do("DELETE FROM auditlog_details WHERE NOT EXISTS (SELECT NULL FROM auditlog WHERE auditlog.auditid = auditlog_details.auditid)");
}