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pgcluu_collectd
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#!/usr/bin/env perl
#------------------------------------------------------------------------------
#
# PgCluu - PostgreSQL monitoring tool with statistics collector and grapher
#
# This program is open source, licensed under the PostgreSQL license.
# For license terms, see the LICENSE file.
#
# Author: Gilles Darold
# Copyright: (C) 2012-2020 Gilles Darold - All rights reserved.
#------------------------------------------------------------------------------
use vars qw($VERSION $PROGRAM);
use strict qw(vars subs);
use File::Basename;
use IO::File;
use POSIX;
use Getopt::Long qw(:config bundling no_ignore_case_always);
use POSIX qw(locale_h sys_wait_h);
setlocale(LC_ALL, 'C');
# Change MASK to 0027 if you want to secure the data directory
# Note that in CGI mode the www-data user or group need read
# access to all files in the statistics directory.
use constant UMASK => 0022;
$| = 1;
$VERSION = '3.1';
$PROGRAM = 'pgcluu_collectd';
$SIG{'CHLD'} = 'DEFAULT';
# Default path to the external programs
# They can be specified into command line options
my $SAR_PROG = 'sar';
my $PSQL_PROG = 'psql';
my $CAT_PROG = 'cat ';
my $PIDSTAT_PROG = 'pidstat';
# Global variables
my $CONFIG_FILE = "/etc/pgcluu.conf";
my $SAR_FILE = 'sar_stats.dat';
my $PIDSTAT_FILE = 'pidstat_stats.dat';
my $PIDFILE = "/var/run/postgresql/pgcluu_collectd.pid";
my $SQL_PROBE = '';
my %DB_INFO = ();
my $HELP = 0;
my $DAEMONIZE = 0;
my $DISABLE_SAR = 0;
my $INTERVAL = 60; # wait 60 seconds between runs
my $DEBUG = 0;
my $DBNAME = '';
my $DBUSER = '';
my $DBHOST = '';
my $DBPORT = '';
my $DBPASS = '';
my @METRICS = ();
my $LIST_METRIC = 0;
my $FILE_REDIR = '>>';
my $PG_VERSION = 0;
my $DBSERVICE = '';
my $STAT_TYPE = 'user';
my $KILL = 0;
my $OS_INFO = 0;
my $NOTABLESPACE= 0;
my $PGBOUNCER_ARGS = '';
my $INCLUDED_DB = ();
my $SKIP_HOURS = '';
my @SKIP_BEGIN = ();
my @SKIP_END = ();
my $USE_BUFFERCACHE = 0;
my $NO_STATEMENTS = 0;
my $NO_SYSINFO = 0;
my $SHOW_VER = 0;
my $END_AFTER = 0;
my $MAX_SIZE = 0;
my $END_AFTER_COUNTER = 0;
my $NO_DATABASE = 0;
my $D_ROTATE = 0;
my $H_ROTATE = 0;
my $RETENTION = 0;
my $OUT_DIR = '.';
my $COMPRESS = 0;
my $OLD_OUT_DIR = '';
my $COLLECT_PID = 0;
my $COMPRESS_PID = 0;
my $GZIP_PROG = '/bin/gzip';
my $INCREMENTAL = 0;
my $CAPTURE = 0;
my $TAR_PROG = 'tar -czf';
my $CAPTURE_DIR = '/tmp';
my $DIFF_PROG = 'diff -U 0';
my $CRONUSER = '';
my $PKG_LIST_PROG = '';
my $DF_COMMAND = 'LANG=C df --output="source,size,used,avail,itotal,iused,iavail,fstype,target" -x squashfs -x tmpfs -x devtmpfs';
my $SAR_PID = 0;
my $PIDSTAT_PID = 0;
# Set the default mask for file and directory creation
umask(UMASK);
# Stores starting time
my $START_TIME = time();
# Variables related to remote ssh connection
my $USE_SSH = '';
my $SSH_COMMAND = '';
my $SSH_BIN = 'ssh';
my $SSH_IDENTITY = '';
my $SSH_USER = '';
my $SSH_TIMEOUT = 10;
my $SSH_OPTIONS = "-o ConnectTimeout=$SSH_TIMEOUT -o PreferredAuthentications=hostbased,publickey";
my $ALWAYS_SECURE_SEARCH_PATH_SQL = "SELECT pg_catalog.set_config('search_path', '', false);";
# Variable to store previous settings
my %ORIGINAL_PG_SETTINGS = ();
my %ORIGINAL_DBROLE_SETTINGS = ();
my %ORIGINAL_SYSTEM_SETTINGS = ();
# Definition to collect metrics from the database
my %METRICS_COMMANDS = (
'database_stats' => {
'output' => 'pg_stat_database.csv',
'command' => 'dump_pgstatdatabase'
},
'tablespace_size_stats' => {
'output' => 'pg_tablespace_size.csv',
'command' => 'dump_pgtablespace_size'
},
'bgwriter_stats' => {
'output' => 'pg_stat_bgwriter.csv',
'command' => 'dump_pgstatbgwriter'
},
'conflict_stats' => {
'output' => 'pg_stat_database_conflicts.csv',
'command' => 'dump_pgstatdatabaseconflicts'
},
'replication_stats' => {
'output' => 'pg_stat_replication.csv',
'command' => 'dump_pgstatreplication'
},
'all_tables_stats' => {
'output' => 'pg_stat_all_tables.csv',
'command' => 'dump_pgstattables',
'repeat' => 1,
'start-end' => 1,
},
'user_tables_stats' => {
'output' => 'pg_stat_user_tables.csv',
'command' => 'dump_pgstattables_user',
'repeat' => 1,
'start-end' => 1,
},
'all_tables_io_stats' => {
'output' => 'pg_statio_all_tables.csv',
'command' => 'dump_pgstatiotables',
'repeat' => 1,
'start-end' => 1,
},
'user_tables_io_stats' => {
'output' => 'pg_statio_user_tables.csv',
'command' => 'dump_pgstatiotables_user',
'repeat' => 1,
'start-end' => 1,
},
'all_indexes_stats' => {
'output' => 'pg_stat_all_indexes.csv',
'command' => 'dump_pgstatindexes',
'repeat' => 1,
'start-end' => 1,
},
'user_indexes_stats' => {
'output' => 'pg_stat_user_indexes.csv',
'command' => 'dump_pgstatindexes_user',
'repeat' => 1,
'start-end' => 1,
},
'all_indexes_io_stats' => {
'output' => 'pg_statio_all_indexes.csv',
'command' => 'dump_pgstatioindexes',
'repeat' => 1,
'start-end' => 1,
},
'user_indexes_io_stats' => {
'output' => 'pg_statio_user_indexes.csv',
'command' => 'dump_pgstatioindexes_user',
'repeat' => 1,
'start-end' => 1,
},
'all_sequences_io_stats' => {
'output' => 'pg_statio_all_sequences.csv',
'command' => 'dump_pgstatiosequences',
'repeat' => 1,
'start-end' => 1,
},
'user_sequences_io_stats' => {
'output' => 'pg_statio_user_sequences.csv',
'command' => 'dump_pgstatiosequences_user',
'repeat' => 1,
'start-end' => 1,
},
'functions_stats' => {
'output' => 'pg_stat_user_functions.csv',
'command' => 'dump_pgstatuserfunctions',
'repeat' => 1,
'start-end' => 1,
},
'xact_functions_stats' => {
'output' => 'pg_stat_xact_user_functions.csv',
'command' => 'dump_pgstatxactuserfunctions',
'repeat' => 1,
'start-end' => 1,
},
'all_xact_tables_stats' => {
'output' => 'pg_stat_xact_all_tables.csv',
'command' => 'dump_pgstatxacttables',
'repeat' => 1,
'start-end' => 1,
},
'user_xact_tables_stats' => {
'output' => 'pg_stat_xact_user_tables.csv',
'command' => 'dump_pgstatxacttables_user',
'repeat' => 1,
'start-end' => 1,
},
'class_size_stats' => {
'output' => 'pg_class_size.csv',
'command' => 'dump_pgclass_size',
'repeat' => 1,
'override' => 1,
},
'lock_types_stats' => {
'output' => 'pg_stat_locks.csv',
'command' => 'dump_pgstatlocktypes',
'repeat' => 1,
},
'lock_modes_stats' => {
'output' => 'pg_stat_locks.csv',
'command' => 'dump_pgstatlockmodes',
'repeat' => 1,
},
'lock_granted_stats' => {
'output' => 'pg_stat_locks.csv',
'command' => 'dump_pgstatlockgranted',
'repeat' => 1,
},
'statements_stats' => {
'output' => 'pg_stat_statements.csv',
'command' => 'dump_pgstatstatements',
'override' => 1,
},
'xlog_stats' => {
'output' => 'pg_xlog_stat.csv',
'command' => 'dump_xlog_stat'
},
'database_size_stats' => {
'output' => 'pg_database_size.csv',
'command' => 'dump_pgdatabase_size'
},
'connections_stats' => {
'output' => 'pg_stat_connections.csv',
'command' => 'dump_pgstatconnections'
},
'pgbouncer_stats' => {
'output' => 'pgbouncer_stats.csv',
'command' => 'dump_pgbouncerpoolstats'
},
'pgbouncer_req_stats' => {
'output' => 'pgbouncer_req_stats.csv',
'command' => 'dump_pgbouncerquerystats'
},
'unused_indexes_stats' => {
'output' => 'pg_stat_unused_indexes.csv',
'command' => 'dump_unusedindexes',
'repeat' => 1,
'override' => 1,
},
'redundant_indexes_stats' => {
'output' => 'pg_stat_redundant_indexes.csv',
'command' => 'dump_redundantindexes',
'repeat' => 1,
'override' => 1,
},
'invalid_indexes_stats' => {
'output' => 'pg_stat_invalid_indexes.csv',
'command' => 'dump_invalidindexes',
'repeat' => 1,
'override' => 1,
},
'hash_indexes_stats' => {
'output' => 'pg_stat_hash_indexes.csv',
'command' => 'dump_hashindexes',
'repeat' => 1,
'override' => 1,
},
'missing_fkindexes_stats' => {
'output' => 'pg_stat_missing_fkindexes.csv',
'command' => 'dump_missingfkindexes',
'repeat' => 1,
'override' => 1,
},
'count_indexes_stats' => {
'output' => 'pg_stat_count_indexes.csv',
'command' => 'dump_count_indexes',
'repeat' => 1,
'override' => 1,
},
'unused_trigfunc_stats' => {
'output' => 'pg_stat_unused_trigfunc.csv',
'command' => 'dump_unusedtrigfunc',
'repeat' => 1,
'override' => 1,
},
'pg_settings_stats' => {
'output' => 'pg_settings.csv',
'command' => 'dump_pgsettings',
'repeat' => 1,
'override' => 1,
},
'pg_nondefault_settings_stats' => {
'output' => 'pg_nondefault_settings.csv',
'command' => 'dump_nondefault_pgsettings',
'repeat' => 1,
'override' => 1,
},
'pg_db_role_setting_stats' => {
'output' => 'pg_db_role_setting.csv',
'command' => 'dump_pgdbrolesetting',
'repeat' => 1,
'override' => 1,
},
'database_buffercache_stats' => {
'output' => 'pg_database_buffercache.csv',
'command' => 'dump_pgdatabase_buffercache'
},
'database_usagecount_stats' => {
'output' => 'pg_database_usagecount.csv',
'command' => 'dump_pgdatabase_usercount'
},
'database_isdirty_stats' => {
'output' => 'pg_database_isdirty.csv',
'command' => 'dump_pgdatabase_isdirty'
},
'relation_buffercache_stats' => {
'output' => 'pg_relation_buffercache.csv',
'command' => 'dump_pgrelation_buffercache',
},
'archiver_stats' => {
'output' => 'pg_stat_archiver.csv',
'command' => 'dump_pgstatarchiver',
},
'configuration_stats' => {
'output' => '',
'command' => 'get_configuration_files',
},
'unlogged_stats' => {
'output' => 'pg_stat_unlogged.csv',
'command' => 'dump_unlogged',
'repeat' => 1,
'override' => 1,
},
'prepared_stats' => {
'output' => 'pg_prepared_xact.csv',
'command' => 'dump_preparedxactstats'
},
'statistics_stats' => {
'output' => 'pg_stat_ext.csv',
'command' => 'dump_statisticsext',
'repeat' => 1,
'override' => 1,
},
);
# Read configuration file before reading command line parameters
&read_conf();
# Process command line options and look for an action keyword. There
# are no mandatory options.
my $result = GetOptions(
"B|enable-buffercache!" => \$USE_BUFFERCACHE,
"c|capture!" => \$CAPTURE,
"C|end-counter=s"=> \$END_AFTER_COUNTER,
"d|dbname=s" => \$DBNAME,
"D|daemonize!" => \$DAEMONIZE,
"E|end-after=s" => \$END_AFTER,
"f|pid-file=s" => \$PIDFILE,
"h|host=s" => \$DBHOST,
"i|interval=i" => \$INTERVAL,
"I|incremental!" => \$INCREMENTAL,
"k|kill!" => \$KILL,
"m|metric=s" => \@METRICS,
"M|max-size=s" => \$MAX_SIZE,
"p|port=i" => \$DBPORT,
"P|psql=s" => \$PSQL_PROG,
"Q|no-statement!"=> \$NO_STATEMENTS,
"r|rotate-daily!"=> \$D_ROTATE,
"R|rotate-hourly!"=> \$H_ROTATE,
"s|sar=s" => \$SAR_PROG,
"S|disable-sar!" => \$DISABLE_SAR,
"T|no-tablespace!"=> \$NOTABLESPACE,
"U|dbuser=s" => \$DBUSER,
"v|verbose!" => \$DEBUG,
"V|version!" => \$SHOW_VER,
"W|password=s" => \$DBPASS,
"z|compress!" => \$COMPRESS,
"pgversion=s" => \$PG_VERSION,
"pgservice=s" => \$DBSERVICE,
"help!" => \$HELP,
"stat-type=s" => \$STAT_TYPE,
"sar-file=s" => \$SAR_FILE,
"list-metric!" => \$LIST_METRIC,
"pgbouncer-args=s" => \$PGBOUNCER_ARGS,
"sysinfo!" => \$OS_INFO,
"no-sysinfo!" => \$NO_SYSINFO,
"no-database!" => \$NO_DATABASE,
"included-db=s" => \$INCLUDED_DB,
"exclude-time=s" => \$SKIP_HOURS,
'enable-ssh!' => \$USE_SSH,
'ssh-command=s' => \$SSH_COMMAND,
'ssh-program=s' => \$SSH_BIN,
'ssh-identity=s' => \$SSH_IDENTITY,
'ssh-option=s' => \$SSH_OPTIONS,
'ssh-user=s' => \$SSH_USER,
'ssh-timeout=i' => \$SSH_TIMEOUT,
'cron-user=s' => \$CRONUSER,
'package-list=s' => \$PKG_LIST_PROG,
'retention=i' => \$RETENTION,
"pidstat=s" => \$PIDSTAT_PROG,
"pidstat-file=s" => \$PIDSTAT_FILE,
) or die &usage();
# Clean retention value
if ($RETENTION) {
$RETENTION =~ s/[+\-]//g;
}
# Set current username for cron listing
if (!$CRONUSER) {
$CRONUSER = $ENV{USERNAME} || 'postgres';
}
# Print version number to stdout
if ($SHOW_VER) {
print "Version: $VERSION\n";
exit 0;
}
END {
kill '-TERM', $SAR_PID if ($SAR_PID);
kill '-TERM', $PIDSTAT_PID if ($PIDSTAT_PID);
}
# The daemon should be stopped
if ($KILL)
{
if (-e "$PIDFILE")
{
my $proc = `cat $PIDFILE`;
chomp($proc);
kill '-TERM', $proc;
if ($? == -1) {
print "FATAL: failed to execute: $!\n";
} elsif ($? & 127) {
printf "ERROR: child died with signal %d, %s coredump\n", ($? & 127), ($? & 128) ? 'with' : 'without';
} else {
printf "OK: pgcluu_collectd exited with value %d\n", $? >> 8;
}
exit 0;
}
else
{
die "ERROR: can't find $PIDFILE, is $PROGRAM running?\n";
}
}
# Display usage if help is asked
&usage if $HELP;
if ($CAPTURE && $DAEMONIZE) {
die "ERROR: option -D (--daemonize) can not be used with option -c (--capture).\n";
} elsif ($CAPTURE) {
$DISABLE_SAR = 1;
}
# Set the multi host information
my @MULTI_HOST_INFO = ();
my @dbnames = split(/,/, $DBNAME);
my @dbports = split(/,/, $DBPORT);
my @dbhosts = split(/,/, $DBHOST);
my @dbusers = split(/,/, $DBUSER);
my @dbpass = split(/,/, $DBPASS);
for (my $i = 0; $i <= $#dbhosts; $i++) {
push(@MULTI_HOST_INFO, { 'ip' => $dbhosts[$i] || 'localhost', 'port' => $dbports[$i] || 5432, 'db' => $dbnames[$i] || 'postgres', 'user' => $dbusers[$i] || 'postgres', 'password' => $dbpass[$i] || ''});
}
# Get the output dir from command line
my $OUTPUT_DIR = $ARGV[0] || '';
# Overwrite the output directory in capture mode
if ($CAPTURE) {
$OUTPUT_DIR = 'pgcluu_capture';
unless(mkdir("$CAPTURE_DIR/$OUTPUT_DIR")) {
die "FATAL: can not create capture temporary directory $CAPTURE_DIR/$OUTPUT_DIR: $!.\n";
} else {
print "INFO: creating temporary output directory: $CAPTURE_DIR/$OUTPUT_DIR\n";
}
}
if ($USE_SSH && !$DBHOST) {
die "FATAL: you must give an ipaddress for the remote host with -h | --host option to use sar remotely\n";
}
# List metrics and associated SQL commands, then exit
if ($LIST_METRIC) {
print "List of available metrics:\n\n";
foreach my $c (sort {$a cmp $b} keys %METRICS_COMMANDS) {
next if (($c =~ /^(user|all)_/) && ($c !~ /^$STAT_TYPE/));
$c =~ s/_stats$//;
print "\t$c\n";
}
print "\n";
exit 0;
}
# Check if an other process is already running
if (-f $PIDFILE) {
&dprint("FATAL: an other process is already started, see pid in $PIDFILE\n");
exit 1;
}
# Check excluded times
if ($SKIP_HOURS)
{
my @timerange = split(/\s+/, $SKIP_HOURS);
foreach my $t (@timerange) {
next if (!$t);
if ($t =~ m#(\d{2}):(\d{2})-(\d{2}):(\d{2})#) {
push(@SKIP_BEGIN, "$1$2");
push(@SKIP_END, "$3$4");
} else {
&dprint("FATAL: Bad time range: $t. Format of exclusion time must be: HH:MM-HH:MM\n");
}
}
}
# Normalize number of seconds before terminating
if ($END_AFTER) {
$END_AFTER =~ s/(\D+)//g;
$END_AFTER ||= 0;
if ($1 =~ /^M/i) {
$END_AFTER *= 60;
} elsif ($1 =~ /^H/i) {
$END_AFTER *= 3600;
} elsif ($1 =~ /^D/i) {
$END_AFTER *= 86400;
}
}
# Set max size of the output dir before terminating
$MAX_SIZE = &parse_pretty_size($MAX_SIZE);
# Validate action(s) to execute
if ($#METRICS >= 0) {
my @list_metric = ();
push(@list_metric, split(/[,]+/, join(',', @METRICS)));
@METRICS = ();
foreach my $a (@list_metric) {
if (!grep(/^${a}_stats$/, keys %METRICS_COMMANDS)) {
&dprint("FATAL: metric $a does not exist. Use --list-metric to show the available metrics.\n");
exit 1;
} else {
push(@METRICS, "${a}_stats");
}
}
} else {
# Perform all metrics actions per default
push(@METRICS, sort {$a cmp $b} keys %METRICS_COMMANDS);
}
# Check if output directory exists
if (!$OUTPUT_DIR) {
&dprint("FATAL: no output directory\n");
exit 1;
} elsif (!$CAPTURE) {
# Ensure this is not a relative path
if (dirname($OUTPUT_DIR) eq '.') {
&dprint("FATAL: output directory ($OUTPUT_DIR) is not an absolute path.\n");
exit 1;
}
}
# Go to that directory if we are not in capture mode otherwise go to /tmp
if (!$CAPTURE) {
unless (chdir($OUTPUT_DIR)) {
&dprint("FATAL: can not change directory to $OUTPUT_DIR: $!\n");
exit 1;
} else {
# Check if we can write in this directory
my $fh = IO::File->new("wtest", 'w');
if (not defined $fh) {
&dprint("FATAL: can not write into output directory $OUTPUT_DIR\n");
exit 1;
}
close($fh);
unlink("wtest");
}
} else {
unless(chdir("$CAPTURE_DIR")) {
&dprint("FATAL: can not change directory to $CAPTURE_DIR: $!\n");
exit 1;
}
$OUT_DIR = $OUTPUT_DIR;
}
# Generate the sar command
my $def_sar_command = "LC_ALL=C $SAR_PROG -t -p -A 1 1 | grep -vE \"Average|Summary\"";
my $def_pidstat_command = "LC_ALL=C $PIDSTAT_PROG -T ALL -u -w -r -d -U postgres 1 1 | grep -v \"Average\"";
my $sshcmd = '';
# Set command to execute sar remotely using ssh if necessary
if ($USE_SSH)
{
# Force using the user defined ssh command
if ($SSH_COMMAND) {
$sshcmd = $SSH_COMMAND;
# else compute command following the configuration parameters
} else {
$sshcmd = $SSH_BIN || 'ssh';
$sshcmd .= " -i $SSH_IDENTITY" if ($SSH_IDENTITY);
$sshcmd .= " $SSH_OPTIONS" if ($SSH_OPTIONS);
if ($SSH_USER) {
$sshcmd .= " $SSH_USER\@$DBHOST";
} else {
$sshcmd .= " $DBHOST";
}
}
# With remote database connection and no ssh acces, disable system and sar information
} elsif ($DBHOST && !grep(/^$DBHOST$/, 'localhost', '127.0.0.1', '::1')) {
$NO_SYSINFO = 1;
$DISABLE_SAR = 1;
}
# Get Os information and exit
if ($OS_INFO && !$NO_SYSINFO) {
&grab_os_information();
exit 0;
}
# Die cleanly on signal
sub terminate
{
my $sig = shift;
&dprint("LOG: Received terminating signal $sig.\n");
$SIG{INT} = \&terminate;
$SIG{TERM} = \&terminate;
if (-f $PIDFILE) {
unlink("$PIDFILE");
}
# Wait for all child processes to die except for the logger
&wait_all_childs();
exit 0;
}
# Die on kill -2, -3 or -15
$SIG{'INT'} = $SIG{'QUIT'} = $SIG{'TERM'} = \&terminate;
# Run in interactive mode if required
if (!$DAEMONIZE) {
# Start in interactive mode
print "\n*** $PROGRAM v$VERSION (pid:$$) started at " . localtime(time) . "\n";
if ($CAPTURE) {
print "Capture mode enabled, $PROGRAM will ended after one single loop.\n\n";
} else {
print "Type Ctrl+c to quit.\n\n";
}
} else {
# detach from terminal
my $pid = fork;
exit 0 if ($pid);
die "FATAL: Couldn't fork: $!" unless defined($pid);
POSIX::setsid() or die "Can't detach: \$!";
&dprint("LOG: Detach from terminal with pid: $$\n");
open(STDIN , '<', "/dev/null");
open(STDOUT, '>', "/dev/null");
open(STDERR, '>', "/dev/null");
}
# Set name of the program without path
my $orig_name = $0;
$0 = $PROGRAM;
# Create pid file
my $fhp = IO::File->new($PIDFILE, 'w');
if (not defined $fhp) {
die "FATAL: can't create pid file $PIDFILE, $!\n";
}
print $fhp $$;
close($fhp);
# Generate the psql command
$PSQL_PROG .= " -XAtq -F';' -f - ";
my $PGBOUNCER_PROG = $PSQL_PROG . ' ' . $PGBOUNCER_ARGS . ' pgbouncer';
if ($NO_DATABASE) {
$PSQL_PROG = '';
} else {
$PSQL_PROG .= " -h $DBHOST" if ($DBHOST);
$PSQL_PROG .= " -p $DBPORT" if ($DBPORT);
$PSQL_PROG .= " -U $DBUSER" if ($DBUSER);
if ($#dbnames >= 0) {
if ($dbnames[0] !~ /^[a-z0-9\_\-]+$/i) {
$PSQL_PROG .= " -d '$dbnames[0]'";
} else {
$PSQL_PROG .= " -d $dbnames[0]";
}
}
if ($DBPASS) {
$ENV{PGPASSWORD} = $DBPASS;
}
}
# Try to grab the sysstat version
my $sysstat_version = '';
if (!$CAPTURE) {
$sysstat_version = &sysstat_version() || '';
}
# Remove action that can't be run with the PostgreSQL version
my $PG_RET = '';
$PG_RET = &verify_action() if (!$NO_DATABASE);
# Look if we should limit statistic collect to some DB
my @included_dbs = ();
@included_dbs = split(/,/, $INCLUDED_DB) if ($INCLUDED_DB);
# end counter
my $tcounter = 0;
# Force rotation in incremental mode
if ($INCREMENTAL) {
$D_ROTATE = 1;
$H_ROTATE = 1;
}
my $previous_time = 0;
while (1) {
# Stores loop start time
my $t0 = time;
# Do not collect metrics if previous time is upper than current time.
# This is to prevent collecting statistics twice when the hour change
# for daylight saving.
if ($previous_time && ($t0 < $previous_time)) {
# Wait next run following the interval value
sleep($INTERVAL);
next;
}
$previous_time = $t0;
# Search if the monitoring need to stop here
if ($END_AFTER && ($t0 > ($START_TIME + $END_AFTER))) {
unlink_pid_and_exit("LOG: ending time reach, terminating.", 0);
}
# If counter reached then exit
$tcounter++;
if (($END_AFTER_COUNTER > 0) && ($tcounter > $END_AFTER_COUNTER)) {
unlink_pid_and_exit("LOG: counter reached, terminating.", 0);
}
# Some time range may not collect data
my ($sec , $min, $hour, $mday, $mon, $year, @other) = localtime(time);
$min = "0$min" if ($min < 10);
$hour = "0$hour" if ($hour < 10);
$mday = "0$mday" if ($mday < 10);
$mon++;
$mon = "0$mon" if ($mon < 10);
$year += 1900;
if (!$CAPTURE) {
for (my $i = 0; $i <= $#SKIP_BEGIN; $i++) {
if ( $SKIP_BEGIN[$i] <= $SKIP_END[$i] ) {
if ( ("$hour$min" >= $SKIP_BEGIN[$i]) && ("$hour$min" <= $SKIP_END[$i]) ) {
# Wait next run
sleep($INTERVAL);
next;
}
} elsif ( $SKIP_BEGIN[$i] > $SKIP_END[$i] ) {
if ( ("$hour$min" >= $SKIP_BEGIN[$i]) && ("$hour$min" < 2400) ||
("$hour$min" <= $SKIP_END[$i]) && ("$hour$min" > 0)) {
# Wait for next run
sleep($INTERVAL);
next;
}
}
}
}
####
# Output dir is now relative to $OUTPUT_DIR because we have chdir to that directory.
####
# Compress previous daily directory if required
if ($COMPRESS && $OLD_OUT_DIR && ($OLD_OUT_DIR ne "$year/$mon/$mday") && $D_ROTATE && !$H_ROTATE) {
# Fork a process to compress old data files in parallel
&spawn_compress(sub {
&compress_files($OLD_OUT_DIR);
});
}
# Set daily rotation subdirectories
if ($D_ROTATE && !$H_ROTATE && !-d "$year/$mon/$mday") {
mkdir("$year") if (!-d "$year");
mkdir("$year/$mon") if (!-d "$year/$mon");
mkdir("$year/$mon/$mday");
# Set the new output directory
$OUT_DIR = "$year/$mon/$mday";
} elsif ($D_ROTATE) {
# Set the new output directory
$OUT_DIR = "$year/$mon/$mday";
}
# Compress previous hourly directory if required
if ($COMPRESS && $OLD_OUT_DIR && ($OLD_OUT_DIR ne "$year/$mon/$mday/$hour") && $H_ROTATE) {
# Fork a process to compress old data files in parallel
&spawn_compress(sub {
&compress_files($OLD_OUT_DIR);
});
}
# Set hourly rotation/incremental subdirectories
if ($H_ROTATE && !-d "$year/$mon/$mday/$hour") {
mkdir("$year") if (!-d "$year");
mkdir("$year/$mon") if (!-d "$year/$mon");
mkdir("$year/$mon/$mday") if (!-d "$year/$mon/$mday");
mkdir("$year/$mon/$mday/$hour");
# Set the new output directory
$OUT_DIR = "$year/$mon/$mday/$hour";
} elsif ($H_ROTATE) {
# Set the new output directory
$OUT_DIR = "$year/$mon/$mday/$hour";
} else {
$OUT_DIR = $OUTPUT_DIR;
}
# If we have a retention limit remove everything older
if ($RETENTION > 0 && $OUTPUT_DIR && $year) {
# We don't use the output directory as root dir but the year
# subdirectory. Rewind to previous year first in case we have
# year overlap.
$year--;
if (-d "$OUTPUT_DIR/$year") {
`find $OUTPUT_DIR/$year/ -name '*' -mtime +$RETENTION -delete`;
}
$year++;
if (-d "$OUTPUT_DIR/$year") {
`find $OUTPUT_DIR/$year/ -name '*' -mtime +$RETENTION -delete`;
}
}
# Set the sar and pidstat command
my $sar_command = '';
my $pidstat_command = '';
if (!$DISABLE_SAR && $sysstat_version)
{
$sar_command = ($sshcmd) ? $sshcmd . ' "' . $def_sar_command . ' "' : $def_sar_command;
$sar_command .= " >>$OUT_DIR/$SAR_FILE";
$pidstat_command = ($sshcmd) ? $sshcmd . ' "' . $def_pidstat_command . ' "' : $def_pidstat_command;
$pidstat_command .= " >>$OUT_DIR/$PIDSTAT_FILE";
# Start processes to collect system statistics permanently
&spawn_sar(sub {
&collect_sysstat($sar_command);
});
&spawn_pidstat(sub {
&collect_sysstat($pidstat_command);
});
}
# Collect all metrics about the cluster
&spawn_collect(sub {
&collect_metrics();
});
# stores previous directory to check when rotated files must compressed
$OLD_OUT_DIR = $OUT_DIR;
# Wait for metric + compress child process to terminate
&wait_all_childs();
if (!$CAPTURE) {
# Lookup if output dir size is upper than limit
if ($MAX_SIZE) {
my $lsize = `du -s $OUTPUT_DIR`;
chomp($lsize);
if ($lsize > $MAX_SIZE) {
unlink_pid_and_exit("LOG: max size limit reach, terminating.", 0);
}
}
# Wait next run following the interval value
my $t1 = time - $t0;
if ($t1 >= $INTERVAL) {
print "WARNING: loop took: $t1 seconds, you may consider increase the interval ($INTERVAL sec) using -i option.\n";
# Wait next run following the interval value
sleep($INTERVAL);
} else {
# Wait next run following the interval value minus the loop time
sleep($INTERVAL - $t1);
}
}
last if ($CAPTURE);
}
# Wait for last child stop
&wait_all_childs();
# In capture mode we have to create a tarball
if ($CAPTURE) {
# be sure to be in the parent directory
chdir($CAPTURE_DIR);
# Then create a tarball before removing the output directory
print "INFO: creating archive $CAPTURE_DIR/pgcluu_capture.tar.gz of the capture directory $CAPTURE_DIR/$OUTPUT_DIR.\n";
`$TAR_PROG pgcluu_capture.tar.gz $OUTPUT_DIR`;
# Removing temporary directory and ensure that we are not removing anything else
print "INFO: removing capture temporary directory: $CAPTURE_DIR/$OUTPUT_DIR\n";
if ($OUTPUT_DIR eq 'pgcluu_capture') {
`rm -rf $OUTPUT_DIR`;
}
}
if (-f $PIDFILE) {
unlink("$PIDFILE") or &dprint("ERROR: Unable to remove pid file $PIDFILE, $!\n");
}
exit 0;
####
# Collect system information using the given command
####
sub collect_sysstat
{
local $SIG{USR1} = sub {
print STDERR "Received terminate signal, exiting.\n";
exit 1;
};
$0 = "pgcluu_collectd: $_[0]";
`$_[0]`;
}
####
# Collect system information about the cluster
####
sub collect_metrics
{
# Use a temporary file, final file sysinfo.txt is overridden at end of the function
if (-e "$OUT_DIR/sysinfo.txt.tmp") {
# Remove old system information file
unlink("$OUT_DIR/sysinfo.txt.tmp");
}
# Store current pgcluu configuration
my $fhl = IO::File->new("$OUT_DIR/sysinfo.txt.tmp", 'a');
if (not defined $fhl) {
&dprint("FATAL: can not write into file $OUT_DIR/sysinfo.txt\n");
unlink_pid_and_exit("FATAL: can not write into file $OUT_DIR/sysinfo.txt.tmp, $!", 1);
}
print $fhl "[CONFIGURATION]\n";
print $fhl "capture=$CAPTURE\n";
print $fhl "sysstat=$sysstat_version\n" if ($sysstat_version);
close($fhl);
# Collect PostgreSQL global cluster information and save all into $OUT_DIR/sysinfo.txt
# Diff with old collected information will be saved to sysinfo.txt.diff
if (!$NO_DATABASE && ($PG_RET >= 0)) {
&get_initial_info();
}
# Get System information and save all into $OUT_DIR/sysinfo.txt
# Diff with old collected information will be saved to sysinfo.txt.diff
if (!$NO_SYSINFO) {
&grab_os_information($OUT_DIR);
}