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#!/usr/local/cpanel/3rdparty/bin/perl
# cpanel - scripts/vps_optimizer Copyright 2022 cPanel, L.L.C.
# All rights reserved.
# copyright@cpanel.net http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited
package scripts::vps_optimzer;
use strict;
use warnings;
use Try::Tiny;
use Pod::Usage ();
use Getopt::Long ();
use Cpanel::LoadFile ();
use Cpanel::Exception ();
use Cpanel::ArrayFunc::Uniq ();
use Cpanel::FileUtils::TouchFile ();
use Cpanel::Transaction::File::LoadConfig ();
our $version = '2.0';
our $CPSPAMD_PATH = '/etc/cpspamd.conf';
exit __PACKAGE__->new()->run_from_command_line(@ARGV) unless caller();
sub new {
my $class = shift;
return bless {}, $class;
}
sub run_from_command_line {
my ( $self, @cmdline_args ) = @_;
die Cpanel::Exception::create('RootRequired')->to_string_no_id() unless ( $> == 0 && $< == 0 );
$self->{'opts'} = _parse_and_validate_opts( \@cmdline_args );
# -1 to get the right exit code
return Pod::Usage::pod2usage( -exitval => 'NOEXIT', -output => \*STDOUT, -verbose => 99, -sections => [qw(NAME DESCRIPTION SYNOPSIS)] ) - 1
if $self->{'opts'}->{'help'};
return 1 if !$self->_validate_environment();
return 0 if !$self->_should_run_on_environment();
my $changes = $self->determine_changes_to_be_made();
my $restarts = $self->make_changes($changes);
$self->_restart_services($restarts);
$self->_mark_run_complete();
return 0;
}
sub determine_changes_to_be_made {
my $self = shift;
# defaults used in the previous version
my $changes = {
'conserve_memory' => 1,
'spamd_config' => {
'maxspare' => 1,
'maxchildren' => 3,
}
};
require Cpanel::Sys::Hardware::Memory;
my $mem_on_system = Cpanel::Sys::Hardware::Memory::get_installed(); # returns MiB
if ( $mem_on_system > 1500 ) {
$changes->{'conserve_memory'} = 0;
if ( $mem_on_system < 2500 ) {
$changes->{'spamd_config'}->{'maxspare'} = 2;
$changes->{'spamd_config'}->{'maxchildren'} = 6;
}
elsif ( $mem_on_system < 4000 ) {
$changes->{'spamd_config'}->{'maxspare'} = 3;
$changes->{'spamd_config'}->{'maxchildren'} = 9;
}
else {
$changes->{'spamd_config'}->{'maxspare'} = 3;
$changes->{'spamd_config'}->{'maxchildren'} = 12;
}
}
return $changes;
}
sub make_changes {
my ( $self, $changes_hr ) = @_;
if ( $changes_hr->{'conserve_memory'} ) {
print '[*] Enabling conserve_memory options... ';
Cpanel::FileUtils::TouchFile::touchfile('/var/cpanel/conserve_memory')
if !$self->{'opts'}->{'dry-run'};
print "Done\n";
}
elsif ( -e '/var/cpanel/conserve_memory' ) {
print '[*] Disabling conserve_memory options... ';
unlink '/var/cpanel/conserve_memory'
if !$self->{'opts'}->{'dry-run'};
print "Done\n";
}
require Cpanel::Config::Services;
my $restarts = [qw/exim dovecot tailwatchd/];
if ( Cpanel::Config::Services::service_enabled('spamd') ) {
$self->update_spamd_config( $changes_hr->{'spamd_config'} );
unshift @{$restarts}, 'spamd';
}
return $restarts;
}
sub update_spamd_config {
my ( $self, $spamd_config ) = @_;
my $ex;
require Cpanel::Transaction::File::LoadConfig;
try {
my $cpspamd_txn = Cpanel::Transaction::File::LoadConfig->new( 'path' => $CPSPAMD_PATH, 'delimiter' => '=', 'permissions' => 0644 );
my $cur_spamd_config = $cpspamd_txn->get_data();
foreach my $directive ( sort ( Cpanel::ArrayFunc::Uniq::uniq( keys %{$spamd_config}, keys %{$cur_spamd_config} ) ) ) {
if ( !exists $cur_spamd_config->{$directive} ) {
print "[*] Adding spamassassin $directive as “$spamd_config->{$directive}”...\n";
}
elsif ( !exists $spamd_config->{$directive} || $spamd_config->{$directive} == $cur_spamd_config->{$directive} ) {
$spamd_config->{$directive} = $cur_spamd_config->{$directive};
print "[*] Preserving spamassassin $directive as “$spamd_config->{$directive}”...\n";
}
else {
print "[*] Switching spamassassin $directive from “$cur_spamd_config->{$directive}” to “$spamd_config->{$directive}”...\n";
}
}
if ( !$self->{'opts'}->{'dry-run'} ) {
$cpspamd_txn->set_data($spamd_config);
$cpspamd_txn->save_or_die();
}
print "[+] Done\n";
}
catch {
$ex = $_;
print "[!] " . Cpanel::Exception::get_string_no_id($ex) . "\n";
};
return $ex ? 0 : 1;
}
sub _restart_services {
my ( $self, $restarts_ar ) = @_;
return if $self->{'opts'}->{'dry-run'};
print "[*] Enqueueing service restarts....\n";
foreach my $service ( @{$restarts_ar} ) {
_schedule_cpservices_task("restartsrv $service");
}
print "[+] Done\n";
return;
}
sub _mark_run_complete {
my $self = shift;
if ( !-e '/var/cpanel/vps_optimized' ) {
mkdir( '/var/cpanel/vps_optimized', 0700 );
}
Cpanel::FileUtils::TouchFile::touchfile("/var/cpanel/vps_optimized/$version")
if !$self->{'opts'}->{'dry-run'};
print "[+] Optimizations Complete!\n";
return 1;
}
sub _should_run_on_environment {
my $self = shift;
my $envtype = Cpanel::LoadFile::loadfile('/var/cpanel/envtype');
if ( $envtype && $envtype eq 'standard' ) {
print "[*] This script is not meant to be run on standard environments\n";
return 0;
}
if ( -e '/var/cpanel/vps_optimized/' . $version && !$self->{'opts'}->{'force'} ) {
print "[*] Optimizations have already been performed once. Use --force to redo optimizations\n";
return 0;
}
return 1;
}
sub _schedule_cpservices_task {
my ($task_str) = @_;
my $err;
require Cpanel::ServerTasks;
try {
Cpanel::ServerTasks::schedule_task( ['CpServicesTasks'], 5, $task_str );
}
catch {
$err = $_;
};
if ($err) {
print "[!] " . Cpanel::Exception::get_string_no_id($err) . "\n";
return 0;
}
return 1;
}
sub _validate_environment {
my $self = shift;
if ( !-e '/usr/local/cpanel/cpkeyclt' ) {
print "[!] Incomplete cPanel installation found. Missing cpkeyclt binary!\n" if $self->{'opts'}->{'verbose'};
return 0;
}
if ( !-e '/var/cpanel/envtype' ) {
print "[*] Validating system environment via cpkeyclt...\n" if $self->{'opts'}->{'verbose'};
system '/usr/local/cpanel/cpkeyclt';
if ( !-e '/var/cpanel/envtype' ) {
print "[!] Problem verifying license information";
return 0;
}
}
return 1;
}
sub _parse_and_validate_opts {
my $cmdline_args_ar = shift;
my $opts = {};
Getopt::Long::GetOptionsFromArray(
$cmdline_args_ar,
$opts,
'help', 'verbose', 'force',
'dry-run', 'skipstartup'
) or die Cpanel::Exception->create_raw("[!] Invalid usage. See --help\n")->to_string_no_id();
return $opts;
}
1;
__END__
=encoding utf8
=head1 NAME
vps_optimizer
=head1 DESCRIPTION
Utility to optimize services for Virtual Private Servers.
=head1 SYNOPSIS
vps_optimizer [OPTIONS]
--dry-run Do not perform any optimization. Simply print what will be done to the screen.
--skipstartup Do not [re]start services after configuration changes have been made.
--force Perform optimizations even if script was run previously.
--verbose Enable verbose output
--help This documentation.
=cut