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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

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