xcat-core/xCAT-client/bin/ppping

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#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
#Note, this ppping still frontends fping. I think it would be possible to write a perl equivalent, but
#I've not had the time. Net::Ping shows perl code I could see being adapted for a somewhat
#asynchronous ICMP ping (the tcp syn is interesting, but far too limited, and that is currently the only async
#method Net::Ping provides.
# This script starts with a noderange from the user, expands it using the
# xcat daemon, then sends a command to every node that can be pinged
# from the machine where it is run to ping all of the other nodes
# obtained from the user. It then prints out the result and exits.
BEGIN
{
# XCATROOT must be set for this script to work
$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
}
use strict;
use lib "$::XCATROOT/lib/perl";
use xCAT::Utils;
use POSIX qw(:signal_h :errno_h :sys_wait_h);
use IO::Socket::SSL;
use XML::Simple;
if ($^O =~ /^linux/i) {
$XML::Simple::PREFERRED_PARSER='XML::Parser';
}
use Data::Dumper;
use IO::Handle;
use IO::Select;
use Getopt::Long;
my $interface;
my $USAGE="Usage: ppping [-i|--interface interfaces] [-d|--debug] [-V|--verbose] [-q|--quiet] [-s|--serial] [-H|--hierarchical] noderange
ppping -h|--help
ppping -v|--version\n";
# Parse the options
if(!GetOptions(
'h|help' => \$::HELP,
'v|version' => \$::VERSION,
's|serial' => \$::SERIAL,
'd|debug' => \$::DEBUG,
'V|verbose' => \$::VERBOSE,
'H|hierarchical' => \$::HIERARCHY,
'q|quiet' => \$::QUIET,
'interface=s' => \$interface))
{
print "$USAGE";
exit 1;
}
if ($::HELP) { print "$USAGE"; exit 0}
if ($::VERSION) {print xCAT::Utils->Version() . "\n"; exit 0}
# A method to prefix and print debug information only if it is wanted.
sub debug {
my $debug_text = shift;
if($::DEBUG){
print("---$debug_text");
}
}
my $xcathost='localhost:3001';
if ($ENV{XCATHOST}) {
$xcathost=$ENV{XCATHOST};
}
unless (@ARGV) {
print "$USAGE";
exit 1;
}
## Connect to xcatd to expand a noderange
my $noderange = $ARGV[0];
my $client = IO::Socket::SSL->new(
PeerAddr=>$xcathost,
SSL_key_file=>$ENV{HOME}."/.xcat/client-cred.pem",
SSL_cert_file=>$ENV{HOME}."/.xcat/client-cred.pem",
SSL_ca_file => $ENV{HOME}."/.xcat/ca.pem",
SSL_use_cert => 1,
#SSL_verify_mode => 1,
);
die "Connection failure: $!\n" unless ($client);
my %cmdref = (command => 'noderange', noderange => $noderange);
# Request nodes from xcatd
debug("[start] - request nodes from xcatd\n");
$SIG{ALRM} = sub { die "No response getting noderange" };
alarm(15);
print $client XMLout(\%cmdref,RootName=>'xcatrequest', NoAttr=>1, KeyAttr => []);
alarm(15);
debug("[stop] - request nodes from xcatd\n");
## Recieve nodes from xcatd and place them in @nodes
my $response="";
my @nodes=();
debug("[start] - recieve nodes from xcatd\n");
while (<$client>) {
alarm(0);
$response .= $_;
if ($response =~ m/<\/xcatresponse>/) {
my $rsp=XMLin($response, ForceArray => ['node']);
$response='';
if ($rsp->{warning}) {
printf "Warning: ".$rsp->{warning}."\n";
}
if ($rsp->{error}) {
die ("ERROR: ".$rsp->{error}."\n");
} elsif ($rsp->{node}) {
@nodes=@{$rsp->{node}};
}
if ($rsp->{serverdone}) {
last;
}
}
}
close($client);
debug("[stop] - recieve nodes from xcatd\n");
debug("\@nodes LENGTH:" . scalar @nodes . "\n");
unless (scalar(@nodes)) {
exit 1;
}
my $children = 0;
my $inputs = new IO::Select;
$SIG{CHLD} = sub { while (waitpid(-1,WNOHANG) > 0) { $children--; } };
## Use pping to determine which nodes are reachable
my @reachable_nodes=();
my @unreachable_nodes=();
debug("[start] - find unreachable nodes\n");
my $cmd = "$::XCATROOT/bin/pping ".join(',',@nodes). " --noexpand 2>&1";
debug("Running '$cmd'\n");
open (PPING, "$cmd |") or die("Cannot open ppinginternal pipe: $!");
while (<PPING>) {
if ($_ =~ / ping/) {
my @a_tmp=split(':', $_);
push(@reachable_nodes, $a_tmp[0]);
}
elsif ($_ =~ /noping/) {
my @a_tmp=split(':', $_);
push(@unreachable_nodes, $a_tmp[0]);
}
else { print $_; } # probably an error msg, so just echo it
}
close(PPING);
# this next line seems to always have a non-zero $?, even if pping succeeded...
#if ($?) { die "Error in the pping command used to first test the nodes (exit code=" . ($?>>8) . ").\n"; }
debug("[stop] - find unreachable nodes\n");
## Dispose of the unreachable nodes now
foreach(@unreachable_nodes) {
print "$_: noping\n";
}
## If there are nodes in @reachable nodes, use xdsh to make each reachable
## node pping2 every other node, even the unreachable ones.
debug("[start] - deal with reachable nodes\n");
debug("REACHABLE_NODES:@reachable_nodes\n");
if (@reachable_nodes == 0) { exit 1; }
my $allnodes=join(',', @nodes);
# Note: even if verbose is not set, we still do not want to set the quiet flag because we want
# to count the pings that come back, unless they request fully quiet mode.
my $quiet = "";
if($::QUIET) { $quiet = "-q "; }
# If hierarchical behavior is wanted, take out the bypass flag
my $bypass = "-B";
if($::HIERARCHY){ $bypass = ""; }
my @interfaces;
if ($interface) { @interfaces = split(/,/, $interface); }
else { $interfaces[0] = ''; }
# Possible todo: this loop runs xdsh pping2 for each interface. An optimization could be to send all
# the interfaces to pping2 at once. But this would mix up all the ping responses and making it
# harder to tell what is going on.
foreach my $interf (@interfaces) {
my $i_string = $interf ? "-i $interf " : '';
## If the serial option was set, pping2 one reachable node at a time.
if ($::SERIAL) {
debug("SERIAL:$::SERIAL\n");
debug("[start] - xdsh to each reachable node\n");
foreach(@reachable_nodes) {
my $command = "$::XCATROOT/bin/xdsh $_ $bypass -s -e $::XCATROOT/sbin/pping2 \"$i_string$quiet$allnodes\" 2>&1";
debug("Running '$command'\n");
open (PPING2, "$command |") or die("Cannot open xdsh internal pipe: $!");
# Print out the result
my %numpings;
while (<PPING2>) {
output($_, \%numpings, $interf);
}
close(PPING2);
}
debug("[stop] - xdsh to each reachable node\n");
}
## If the serial option was not set, pping2 all the reachable nodes simultaneously.
else {
debug("SERIAL not set.\n");
my $node_string=join(',', @reachable_nodes);
my $command = "$::XCATROOT/bin/xdsh $node_string $bypass -s -e $::XCATROOT/sbin/pping2 \"$i_string$quiet$allnodes\" 2>&1";
debug("Running '$command'\n");
open (PPING2, "$command |") or die("Cannot open xdsh internal pipe: $!");
# Print out the result
my %numpings;
while (<PPING2>) {
output($_, \%numpings, $interf);
}
close(PPING2);
}
}
debug("[stop] - deal with reachable nodes\n");
exit 0;
# Process the output if the xdsh pping2 commands
sub output {
my $line = shift;
my $numpings = shift;
my $interface = shift;
if ($line =~ /^\s*$/) { return; } # xdsh had a habit of adding an extra blank line in streaming mode
# In verbose mode we just echo everything. In quiet mode, the only thing that will come back
# from pping2 are the nopings, so we echo everything in that case too.
if ($::VERBOSE || $::QUIET) { print "$line"; return; }
# This is the default case in which pping2 will return both pings and nopings.
# We want to count the pings and display the nopings.
my $node;
if ( ($node) = $line =~ /^(\S+):.+:\s+ping$/) {
if (!($numpings->{$node}==-1)) {
$numpings->{$node}++;
# If we got pings for all the nodes then print success
if ($numpings->{$node} >= scalar(@nodes)) {
my $istr = $interface ? " on interface $interface" : '';
print "$node: pinged all nodes successfully$istr\n";
$numpings->{$node} = -1;
}
}
}
else {
print "$line";
if ( ($node) = $line =~ /^(\S+?):/) { $numpings->{$node} = -1; } # something beside ping, stop counting
}
}