480 lines
10 KiB
Perl
Executable File
480 lines
10 KiB
Perl
Executable File
#!/usr/bin/perl -w
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use strict;
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use PVE::SafeSyslog;
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use POSIX ":sys_wait_h";
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use Fcntl ':flock';
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use Getopt::Long;
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use Time::HiRes qw (gettimeofday);
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use PVE::Tools qw(dir_glob_foreach file_read_firstline);
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use PVE::ProcFSTools;
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use Filesys::Df;
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use PVE::INotify;
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use PVE::Cluster qw(cfs_read_file);
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use PVE::Storage;
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use PVE::QemuServer;
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use PVE::OpenVZ;
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use PVE::RPCEnvironment;
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use PVE::API2::Subscription;
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use PVE::AutoBalloon;
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$SIG{'__WARN__'} = sub {
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my $err = $@;
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my $t = $_[0];
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chomp $t;
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syslog('warning', "WARNING: %s", $t);
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$@ = $err;
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};
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initlog('pvestatd');
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$ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin';
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die "please run as root\n" if $> != 0;
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my $nodename = PVE::INotify::nodename();
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my $opt_debug;
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if (!GetOptions ('debug' => \$opt_debug)) {
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die "USAGE: $0 [--debug]\n";
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}
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my $opt_pidfile = "/var/run/pvestatd.pid";
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sub lockpidfile {
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my $pidfile = shift;
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my $lkfn = "$pidfile.lock";
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if (!open (FLCK, ">>$lkfn")) {
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my $msg = "can't aquire lock on file '$lkfn' - $!";
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syslog ('err', $msg);
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die "ERROR: $msg\n";
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}
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if (!flock (FLCK, LOCK_EX|LOCK_NB)) {
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close (FLCK);
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my $msg = "can't aquire lock '$lkfn' - $!";
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syslog ('err', $msg);
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die "ERROR: $msg\n";
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}
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}
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sub writepidfile {
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my $pidfile = shift;
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if (!open (PIDFH, ">$pidfile")) {
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my $msg = "can't open pid file '$pidfile' - $!";
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syslog ('err', $msg);
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die "ERROR: $msg\n";
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}
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print PIDFH "$$\n";
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close (PIDFH);
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}
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# try to get the lock
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lockpidfile($opt_pidfile);
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# run in background
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my $spid;
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my $restart = $ENV{RESTART_PVESTATD};
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if (!$opt_debug) {
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open STDIN, '</dev/null' || die "can't read /dev/null";
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open STDOUT, '>/dev/null' || die "can't write /dev/null";
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}
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if (!$restart && !$opt_debug) {
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$spid = fork();
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if (!defined ($spid)) {
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my $msg = "can't put server into background - fork failed";
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syslog('err', $msg);
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die "ERROR: $msg\n";
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} elsif ($spid) { #parent
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exit (0);
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}
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}
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writepidfile($opt_pidfile);
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open STDERR, '>&STDOUT' || die "can't close STDERR\n";
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sub cleanup {
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unlink "$opt_pidfile.lock";
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unlink "$opt_pidfile";
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}
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$SIG{INT} = $SIG{TERM} = $SIG{QUIT} = sub {
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syslog('info' , "server closing");
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$SIG{INT} = 'DEFAULT';
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# wait for children
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1 while (waitpid(-1, POSIX::WNOHANG()) > 0);
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cleanup();
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exit (0);
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};
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PVE::INotify::inotify_init();
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my $reload_config;
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if ($restart) {
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syslog('info' , "restarting server");
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} else {
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syslog('info' , "starting server");
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}
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$SIG{HUP} = sub {
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$reload_config = 1;
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};
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sub update_node_status {
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my ($avg1, $avg5, $avg15) = PVE::ProcFSTools::read_loadavg();
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my $stat = PVE::ProcFSTools::read_proc_stat();
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my $netdev = PVE::ProcFSTools::read_proc_net_dev();
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my ($uptime) = PVE::ProcFSTools::read_proc_uptime();
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my $cpuinfo = PVE::ProcFSTools::read_cpuinfo();
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my $maxcpu = $cpuinfo->{cpus};
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my $subinfo = PVE::INotify::read_file('subscription');
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my $sublevel = $subinfo->{level} || '';
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# traffic from/to physical interface cards
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my $netin = 0;
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my $netout = 0;
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foreach my $dev (keys %$netdev) {
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next if $dev !~ m/^eth\d+$/;
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$netin += $netdev->{$dev}->{receive};
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$netout += $netdev->{$dev}->{transmit};
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}
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my $meminfo = PVE::ProcFSTools::read_meminfo();
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my $dinfo = df('/', 1); # output is bytes
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my $ctime = time();
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# everything not free is considered to be used
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my $dused = $dinfo->{blocks} - $dinfo->{bfree};
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my $data = "$uptime:$sublevel:$ctime:$avg1:$maxcpu:$stat->{cpu}:$stat->{wait}:" .
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"$meminfo->{memtotal}:$meminfo->{memused}:" .
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"$meminfo->{swaptotal}:$meminfo->{swapused}:" .
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"$dinfo->{blocks}:$dused:$netin:$netout";
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PVE::Cluster::broadcast_rrd("pve2-node/$nodename", $data);
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}
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sub auto_balloning {
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my ($vmstatus) = @_;
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my $log = sub {
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return if !$opt_debug;
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print @_;
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};
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my $hostmeminfo = PVE::ProcFSTools::read_meminfo();
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# to debug, run 'pvestatd -d' and set memtotal here
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#$hostmeminfo->{memtotal} = int(2*1024*1024*1024/0.8); # you can set this to test
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my $hostfreemem = $hostmeminfo->{memtotal} - $hostmeminfo->{memused};
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# we try to use about 80% host memory
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# goal: we want to change memory usage by this amount (positive or negative)
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my $goal = int($hostmeminfo->{memtotal}*0.8 - $hostmeminfo->{memused});
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my $maxchange = 100*1024*1024;
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my $res = PVE::AutoBalloon::compute_alg1($vmstatus, $goal, $maxchange);
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&$log("host goal: $goal free: $hostfreemem total: $hostmeminfo->{memtotal}\n");
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foreach my $vmid (keys %$vmstatus) {
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next if !$res->{$vmid};
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my $d = $vmstatus->{$vmid};
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my $diff = int($res->{$vmid} - $d->{balloon});
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my $absdiff = $diff < 0 ? -$diff : $diff;
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if ($absdiff > 0) {
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&$log("BALLOON $vmid to $res->{$vmid} ($diff)\n");
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eval {
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PVE::QemuServer::vm_mon_cmd($vmid, "balloon",
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value => int($res->{$vmid}));
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};
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warn $@ if $@;
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}
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}
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}
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sub update_qemu_status {
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my $ctime = time();
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my $vmstatus = PVE::QemuServer::vmstatus(undef, 1);
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eval { auto_balloning($vmstatus); };
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syslog('err', "auto ballooning error: $@") if $@;
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foreach my $vmid (keys %$vmstatus) {
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my $d = $vmstatus->{$vmid};
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my $data;
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my $status = $d->{qmpstatus} || $d->{status} || 'stopped';
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my $template = $d->{template} ? $d->{template} : "0";
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if ($d->{pid}) { # running
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$data = "$d->{uptime}:$d->{name}:$status:$template:" .
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"$ctime:$d->{cpus}:$d->{cpu}:" .
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"$d->{maxmem}:$d->{mem}:" .
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"$d->{maxdisk}:$d->{disk}:" .
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"$d->{netin}:$d->{netout}:" .
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"$d->{diskread}:$d->{diskwrite}";
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} else {
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$data = "0:$d->{name}:$status:$template:$ctime:$d->{cpus}::" .
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"$d->{maxmem}::" .
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"$d->{maxdisk}:$d->{disk}:" .
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":::";
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}
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PVE::Cluster::broadcast_rrd("pve2.3-vm/$vmid", $data);
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}
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}
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sub find_vzctl_console_pids {
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my $res = {};
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dir_glob_foreach('/proc', '\d+', sub {
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my ($pid) = @_;
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my $cmdline = file_read_firstline("/proc/$pid/cmdline");
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return if !$cmdline;
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my @args = split(/\0/, $cmdline);
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# serach for vzctl console <vmid>
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return if scalar(@args) != 3;
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return if $args[1] ne 'console';
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return if $args[2] !~ m/^\d+$/;
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return if $args[0] !~ m|^(/usr/sbin/)?vzctl$|;
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my $vmid = $args[2];
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push @{$res->{$vmid}}, $pid;
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});
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return $res;
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}
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sub remove_stale_openvz_consoles {
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my $vmstatus = PVE::OpenVZ::vmstatus();
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my $pidhash = find_vzctl_console_pids();
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foreach my $vmid (keys %$pidhash) {
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next if defined($vmstatus->{$vmid});
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syslog('info', "remove stale vzctl console for CT $vmid");
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foreach my $pid (@{$pidhash->{$vmid}}) {
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kill(9, $pid);
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}
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}
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}
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sub update_openvz_status {
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my $ctime = time();
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my $vmstatus = PVE::OpenVZ::vmstatus();
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foreach my $vmid (keys %$vmstatus) {
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my $d = $vmstatus->{$vmid};
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my $data;
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if ($d->{status} eq 'running') { # running
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$data = "$d->{uptime}:$d->{name}:$d->{status}:0:$ctime:$d->{cpus}:$d->{cpu}:" .
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"$d->{maxmem}:$d->{mem}:" .
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"$d->{maxdisk}:$d->{disk}:" .
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"$d->{netin}:$d->{netout}:" .
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"$d->{diskread}:$d->{diskwrite}";
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} else {
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$data = "0:$d->{name}:$d->{status}:0:$ctime:$d->{cpus}::" .
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"$d->{maxmem}::" .
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"$d->{maxdisk}:$d->{disk}:" .
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":::";
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}
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PVE::Cluster::broadcast_rrd("pve2.3-vm/$vmid", $data);
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}
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}
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sub update_storage_status {
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my $cfg = cfs_read_file("storage.cfg");
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my $ctime = time();
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my $info = PVE::Storage::storage_info($cfg);
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foreach my $storeid (keys %$info) {
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my $d = $info->{$storeid};
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next if !$d->{active};
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# everything not free is considered to be used
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my $realused = $d->{total} - $d->{avail};
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my $data = "$ctime:$d->{total}:$realused";
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my $key = "pve2-storage/${nodename}/$storeid";
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PVE::Cluster::broadcast_rrd($key, $data);
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}
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}
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sub update_status {
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# update worker list. This is not really required and
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# we just call this to make sure that we have a correct
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# list in case of an unexpected crash.
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eval {
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my $tlist = PVE::RPCEnvironment::active_workers();
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PVE::Cluster::broadcast_tasklist($tlist);
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};
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my $err = $@;
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syslog('err', $err) if $err;
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eval {
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update_node_status();
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};
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$err = $@;
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syslog('err', "node status update error: $err") if $err;
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eval {
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update_qemu_status();
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};
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$err = $@;
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syslog('err', "qemu status update error: $err") if $err;
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eval {
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update_openvz_status();
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};
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$err = $@;
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syslog('err', "openvz status update error: $err") if $err;
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eval {
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update_storage_status();
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};
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$err = $@;
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syslog('err', "storage status update error: $err") if $err;
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eval {
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remove_stale_openvz_consoles();
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};
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$err = $@;
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syslog('err', "openvz console cleanup error: $err") if $err;
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}
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my $next_update = 0;
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# do not update directly after startup, because install scripts
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# have a problem with that
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my $cycle = 0;
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my $updatetime = 10;
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my $commandline = [$0, @ARGV];
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$0 = "pvestatd";
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sub restart_server {
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my $waittime = shift;
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syslog('info', "server shutdown (restart)");
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$ENV{RESTART_PVESTATD} = 1;
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sleep($waittime) if $waittime; # avoid high server load due to restarts
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exec (@$commandline);
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exit (-1); # never reached?
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}
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my $initial_memory_usage;
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for (;;) { # forever
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eval {
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$next_update = time() + $updatetime;
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if ($cycle) {
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my ($ccsec, $cusec) = gettimeofday ();
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eval {
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$reload_config = 0;
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# syslog('info', "start status update");
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PVE::Cluster::cfs_update();
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update_status();
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};
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my $err = $@;
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if ($err) {
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syslog('err', "status update error: $err");
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}
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my ($ccsec_end, $cusec_end) = gettimeofday ();
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my $cptime = ($ccsec_end-$ccsec) + ($cusec_end - $cusec)/1000000;
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syslog('info', sprintf("status update time (%.3f seconds)", $cptime))
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if ($cptime > 5);
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}
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$cycle++;
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my $mem = PVE::ProcFSTools::read_memory_usage();
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if (!defined($initial_memory_usage) || ($cycle < 10)) {
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$initial_memory_usage = $mem->{resident};
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} else {
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my $diff = $mem->{resident} - $initial_memory_usage;
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if ($diff > 5*1024*1024) {
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syslog ('info', "restarting server after $cycle cycles to " .
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"reduce memory usage (free $mem->{resident} ($diff) bytes)");
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restart_server ();
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}
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}
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my $wcount = 0;
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while ((time() < $next_update) &&
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($wcount < $updatetime) && # protect against time wrap
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!$reload_config) { $wcount++; sleep (1); };
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};
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my $err = $@;
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if ($err) {
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syslog ('err', "ERROR: $err");
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restart_server(5);
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exit (0);
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}
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}
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exit (0);
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__END__
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=head1 NAME
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pvestatd - PVE Status Daemon
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=head1 SYNOPSIS
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pvestatd
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=head1 DESCRIPTION
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Documentation is available at www.proxmox.com
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