mirror of
https://github.com/xcat2/xcat-core.git
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85 lines
2.7 KiB
Perl
Executable File
85 lines
2.7 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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use Fcntl qw(:DEFAULT :flock);
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sub get_lock {
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unless (flock(LOCKHANDLE, LOCK_EX | LOCK_NB)) {
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$| = 1;
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print "Acquiring startup lock...";
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flock(LOCKHANDLE, LOCK_EX) or die "Error trying to secure a startup lock";
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print "done\n";
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}
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truncate(LOCKHANDLE, 0);
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print LOCKHANDLE $$ . "\n";
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}
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sub release_lock {
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truncate(LOCKHANDLE, 0);
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flock(LOCKHANDLE, LOCK_UN);
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}
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BEGIN
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{
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use Time::HiRes qw(sleep);
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use File::Path;
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use Fcntl qw(:DEFAULT :flock);
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$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
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umask 0077;
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mkpath("/tmp/xcat/");
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unless (sysopen(LOCKHANDLE, "/tmp/xcat/consolelock", O_WRONLY | O_CREAT)) {
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sleep 15;
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print "Unable to open lock file";
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exit 0;
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}
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get_lock();
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}
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my $sleepint = int(rand(10)); #Stagger start to avoid overwhelming conserver/xCATd
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use lib "$::XCATROOT/lib/perl";
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require xCAT::Client;
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require File::Basename;
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import File::Basename;
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my $scriptname = $0;
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my $username = "USERID";
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my $passsword = "PASSW0RD";
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my $mm;
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my $slot;
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sub getans {
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my $rsp = shift;
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if ($rsp->{node}) {
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$mm = $rsp->{node}->[0]->{mm}->[0];
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$username = $rsp->{node}->[0]->{username}->[0];
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$slot = $rsp->{node}->[0]->{slot}->[0];
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$slot =~ s/-.*//; #remove range info if multi-wide blade
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}
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}
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my $cmdref = {
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command => ["getbladecons"],
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arg => ["text"],
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noderange => [ $ARGV[0] ]
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};
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xCAT::Client::submit_request($cmdref, \&getans);
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until ($mm and $username and $slot) {
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release_lock(); #Let other clients have a go
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$sleepint = 10 + int(rand(20)); #Stagger to minimize lock collisions, but no big deal when it does happen
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print "Console not ready, retrying in $sleepint seconds (Hit Ctrl-E,c,o to skip delay)\n";
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sleep $sleepint;
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get_lock();
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xCAT::Client::submit_request($cmdref, \&getans);
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}
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release_lock(); #done with xcatd, can run with near impunity
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my $solchkcmd = "ssh -t $username" . "@" . "$mm sol -T blade[$slot]";
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my $solstatus = `$solchkcmd`;
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while ($solstatus !~ /SOL Session: Ready/ and $solstatus !~ /SOL Session: Active/) {
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$sleepint = 60 + int(rand(30)); #Stagger sleep to take it easy on AMM/hosting server
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print "SOL unavailable, retrying in $sleepint seconds (hit Ctrl-E,c,o to skip)\n";
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sleep $sleepint;
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$solstatus = `$solchkcmd`;
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}
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exec "ssh -t $username" . "@" . "$mm console -o -T blade[$slot]";
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#SECURITY: In this case, the authentication is expected to be done using the script user's ssh keys. As such,
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#this script does not receive any particularly sensitive data from the xCAT server.
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