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268 lines
8.6 KiB
Perl
Executable File
268 lines
8.6 KiB
Perl
Executable File
#!/usr/bin/env perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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#Note, this ppping still frontends fping. I think it would be possible to write a perl equivalent, but
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#I've not had the time. Net::Ping shows perl code I could see being adapted for a somewhat
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#asynchronous ICMP ping (the tcp syn is interesting, but far too limited, and that is currently the only async
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#method Net::Ping provides.
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# This script starts with a noderange from the user, expands it using the
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# xcat daemon, then sends a command to every node that can be pinged
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# from the machine where it is run to ping all of the other nodes
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# obtained from the user. It then prints out the result and exits.
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BEGIN
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{
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# XCATROOT must be set for this script to work
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$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
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}
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use strict;
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use lib "$::XCATROOT/lib/perl";
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use xCAT::Utils;
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use POSIX qw(:signal_h :errno_h :sys_wait_h);
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use IO::Socket::SSL;
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use XML::Simple;
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if ($^O =~ /^linux/i) {
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$XML::Simple::PREFERRED_PARSER = 'XML::Parser';
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}
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#use Data::Dumper;
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use IO::Handle;
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use IO::Select;
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use Getopt::Long;
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my $interface;
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my $USAGE = "Usage: ppping [-i|--interface interfaces] [-d|--debug] [-V|--verbose] [-q|--quiet] [-s|--serial] noderange
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ppping -h|--help
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ppping -v|--version\n";
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# Parse the options
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require Getopt::Long;
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Getopt::Long::Configure("bundling");
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if (!GetOptions(
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'h|help' => \$::HELP,
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'v|version' => \$::VERSION,
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's|serial' => \$::SERIAL,
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'd|debug' => \$::DEBUG,
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'V|verbose' => \$::VERBOSE,
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'H|hierarchical' => \$::HIERARCHY,
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'q|quiet' => \$::QUIET,
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'i|interface=s' => \$interface))
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{
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print "$USAGE";
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exit 1;
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}
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if ($::HELP) { print "$USAGE"; exit 0 }
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if ($::VERSION) { print xCAT::Utils->Version() . "\n"; exit 0 }
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# A method to prefix and print debug information only if it is wanted.
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sub debug {
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my $debug_text = shift;
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if ($::DEBUG) {
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print("---$debug_text");
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}
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}
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my $xcathost = 'localhost:3001';
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if ($ENV{XCATHOST}) {
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$xcathost = $ENV{XCATHOST};
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}
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unless (@ARGV) {
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print "$USAGE";
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exit 1;
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}
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## Connect to xcatd to expand a noderange
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my $noderange = $ARGV[0];
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my @user = getpwuid($>);
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my $homedir = $user[7];
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my %sslargs;
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if (defined($ENV{'XCATSSLVER'})) {
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$sslargs{SSL_version} = $ENV{'XCATSSLVER'};
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}
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my $client = IO::Socket::SSL->new(
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PeerAddr => $xcathost,
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SSL_key_file => $homedir . "/.xcat/client-cred.pem",
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SSL_cert_file => $homedir . "/.xcat/client-cred.pem",
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SSL_ca_file => $homedir . "/.xcat/ca.pem",
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SSL_use_cert => 1,
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%sslargs,
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SSL_verify_mode => SSL_VERIFY_PEER,
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SSL_verifycn_scheme => "none",
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);
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die "Connection failure: $!\n" unless ($client);
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my %cmdref = (command => 'noderange', noderange => $noderange);
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# Request nodes from xcatd
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debug("[start] - request nodes from xcatd\n");
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$SIG{ALRM} = sub { die "No response getting noderange" };
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alarm(15);
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print $client XMLout(\%cmdref, RootName => 'xcatrequest', NoAttr => 1, KeyAttr => []);
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alarm(15);
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debug("[stop] - request nodes from xcatd\n");
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## Recieve nodes from xcatd and place them in @nodes
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my $response = "";
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my @nodes = ();
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debug("[start] - recieve nodes from xcatd\n");
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while (<$client>) {
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alarm(0);
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$response .= $_;
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if ($response =~ m/<\/xcatresponse>/) {
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my $rsp = XMLin($response, ForceArray => ['node']);
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$response = '';
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if ($rsp->{warning}) {
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printf "Warning: " . $rsp->{warning} . "\n";
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}
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if ($rsp->{error}) {
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die("ERROR: " . $rsp->{error} . "\n");
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} elsif ($rsp->{node}) {
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@nodes = @{ $rsp->{node} };
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}
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if ($rsp->{serverdone}) {
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last;
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}
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}
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}
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close($client);
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debug("[stop] - recieve nodes from xcatd\n");
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debug("\@nodes LENGTH:" . scalar @nodes . "\n");
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unless (scalar(@nodes)) {
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exit 1;
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}
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my $children = 0;
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my $inputs = new IO::Select;
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$SIG{CHLD} = sub { while (waitpid(-1, WNOHANG) > 0) { $children--; } };
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## Use pping to determine which nodes are reachable
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my @reachable_nodes = ();
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my @unreachable_nodes = ();
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debug("[start] - find unreachable nodes\n");
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my $cmd = "$::XCATROOT/bin/pping " . join(',', @nodes) . " --noexpand 2>&1";
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debug("Running '$cmd'\n");
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open(PPING, "$cmd |") or die("Cannot open ppinginternal pipe: $!");
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while (<PPING>) {
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if ($_ =~ / ping/) {
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my @a_tmp = split(':', $_);
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push(@reachable_nodes, $a_tmp[0]);
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}
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elsif ($_ =~ /noping/) {
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my @a_tmp = split(':', $_);
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push(@unreachable_nodes, $a_tmp[0]);
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}
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else { print $_; } # probably an error msg, so just echo it
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}
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close(PPING);
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# this next line seems to always have a non-zero $?, even if pping succeeded...
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#if ($?) { die "Error in the pping command used to first test the nodes (exit code=" . ($?>>8) . ").\n"; }
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debug("[stop] - find unreachable nodes\n");
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## Dispose of the unreachable nodes now
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foreach (@unreachable_nodes) {
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print "$_: noping\n";
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}
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## If there are nodes in @reachable nodes, use xdsh to make each reachable
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## node pping2 every other node, even the unreachable ones.
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debug("[start] - deal with reachable nodes\n");
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debug("REACHABLE_NODES:@reachable_nodes\n");
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if (@reachable_nodes == 0) { exit 1; }
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my $allnodes = join(',', @nodes);
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# Note: even if verbose is not set, we still do not want to set the quiet flag because we want
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# to count the pings that come back, unless they request fully quiet mode.
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my $quiet = "";
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if ($::QUIET) { $quiet = "-q "; }
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# bypass mode for xdsh is not used any more, because it doesn't give any advantage
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my $bypass = "";
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my @interfaces;
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if ($interface) { @interfaces = split(/,/, $interface); }
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else { $interfaces[0] = ''; }
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# Possible todo: this loop runs xdsh pping2 for each interface. An optimization could be to send all
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# the interfaces to pping2 at once. But this would mix up all the ping responses and making it
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# harder to tell what is going on.
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foreach my $interf (@interfaces) {
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my $i_string = $interf ? "-i $interf " : '';
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## If the serial option was set, pping2 one reachable node at a time.
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if ($::SERIAL) {
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debug("SERIAL:$::SERIAL\n");
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debug("[start] - xdsh to each reachable node\n");
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foreach (@reachable_nodes) {
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my $command = "$::XCATROOT/bin/xdsh $_ $bypass -s -e $::XCATROOT/sbin/pping2 \"$i_string$quiet$allnodes\" 2>&1";
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debug("Running '$command'\n");
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open(PPING2, "$command |") or die("Cannot open xdsh internal pipe: $!");
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# Print out the result
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my %numpings;
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while (<PPING2>) {
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output($_, \%numpings, $interf);
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}
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close(PPING2);
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}
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debug("[stop] - xdsh to each reachable node\n");
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}
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## If the serial option was not set, pping2 all the reachable nodes simultaneously.
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else {
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debug("SERIAL not set.\n");
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my $node_string = join(',', @reachable_nodes);
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my $command = "$::XCATROOT/bin/xdsh $node_string $bypass -s -e $::XCATROOT/sbin/pping2 \"$i_string$quiet$allnodes\" 2>&1";
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debug("Running '$command'\n");
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open(PPING2, "$command |") or die("Cannot open xdsh internal pipe: $!");
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# Print out the result
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my %numpings;
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while (<PPING2>) {
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output($_, \%numpings, $interf);
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}
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close(PPING2);
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}
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}
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debug("[stop] - deal with reachable nodes\n");
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exit 0;
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# Process the output if the xdsh pping2 commands
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sub output {
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my $line = shift;
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my $numpings = shift;
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my $interface = shift;
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if ($line =~ /^\s*$/) { return; } # xdsh had a habit of adding an extra blank line in streaming mode
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# In verbose mode we just echo everything. In quiet mode, the only thing that will come back
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# from pping2 are the nopings, so we echo everything in that case too.
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if ($::VERBOSE || $::QUIET) { print "$line"; return; }
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# This is the default case in which pping2 will return both pings and nopings.
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# We want to count the pings and display the nopings.
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my $node;
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if (($node) = $line =~ /^(\S+):.+:\s+ping$/) {
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if (!($numpings->{$node} == -1)) {
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$numpings->{$node}++;
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# If we got pings for all the nodes then print success
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if ($numpings->{$node} >= scalar(@nodes)) {
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my $istr = $interface ? " on interface $interface" : '';
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print "$node: pinged all nodes successfully$istr\n";
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$numpings->{$node} = -1;
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}
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}
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}
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else {
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print "$line";
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if (($node) = $line =~ /^(\S+?):/) { $numpings->{$node} = -1; } # something beside ping, stop counting
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}
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}
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