mirror of
https://github.com/xcat2/xcat-core.git
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40e144b4cc
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@13467 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
434 lines
12 KiB
Perl
434 lines
12 KiB
Perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT_plugin::prescripts;
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BEGIN
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{
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$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : '/opt/xcat';
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}
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use lib "$::XCATROOT/lib/perl";
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use strict;
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require xCAT::Table;
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require xCAT::Utils;
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require xCAT::TableUtils;
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require xCAT::ServiceNodeUtils;
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require xCAT::MsgUtils;
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use Getopt::Long;
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use Sys::Hostname;
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use Time::HiRes qw(gettimeofday sleep);
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use POSIX "WNOHANG";
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1;
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#-------------------------------------------------------
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=head3 handled_commands
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Return list of commands handled by this plugin
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=cut
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#-------------------------------------------------------
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sub handled_commands
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{
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return {
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runbeginpre => "prescripts",
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runendpre => "prescripts"
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};
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}
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#-------------------------------------------------------
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=head3 preprocess_request
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Check and setup for hierarchy
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=cut
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#-------------------------------------------------------
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sub preprocess_request
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{
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my $req = shift;
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my $cb = shift;
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#if already preprocessed, go straight to request
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if ($req->{_xcatpreprocessed}->[0] == 1) { return [$req]; }
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my $nodes = $req->{node};
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if (!$nodes) { return;}
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my $service = "xcat";
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my @args=();
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if (ref($req->{arg})) {
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@args=@{$req->{arg}};
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} else {
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@args=($req->{arg});
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}
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@ARGV = @args;
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#print "prepscripts: preprocess_request get called, args=@args, nodes=@$nodes\n";
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#use Getopt::Long;
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Getopt::Long::Configure("bundling");
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Getopt::Long::Configure("pass_through");
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GetOptions('l' => \$::LOCAL);
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my $sn = xCAT::ServiceNodeUtils->getSNformattedhash($nodes, $service, "MN");
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my @requests;
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if ($::LOCAL) { #only handle the local nodes
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#print "process local nodes: @$nodes\n";
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#get its own children only
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my @hostinfo=xCAT::NetworkUtils->determinehostname();
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my %iphash=();
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foreach(@hostinfo) {$iphash{$_}=1;}
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my @children=();
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foreach my $snkey (keys %$sn) {
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if (exists($iphash{$snkey})) {
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my $tmp=$sn->{$snkey};
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@children=(@children,@$tmp);
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}
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}
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if (@children > 0) {
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my $reqcopy = {%$req};
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$reqcopy->{node} = \@children;
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$reqcopy->{'_xcatdest'} = $hostinfo[0];
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$reqcopy->{_xcatpreprocessed}->[0] = 1;
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push @requests, $reqcopy;
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return \@requests;
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}
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} else { #run on mn and need to dispatch the requests to the service nodes
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#print "dispatch to sn\n";
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# find service nodes for requested nodes
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# build an individual request for each service node
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# find out the names for the Management Node
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foreach my $snkey (keys %$sn)
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{
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my $reqcopy = {%$req};
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$reqcopy->{node} = $sn->{$snkey};
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$reqcopy->{'_xcatdest'} = $snkey;
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$reqcopy->{_xcatpreprocessed}->[0] = 1;
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push @requests, $reqcopy;
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} # end foreach
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return \@requests;
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}
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return;
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}
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#-------------------------------------------------------
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=head3 process_request
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Process the command
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=cut
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#-------------------------------------------------------
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sub process_request
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{
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my $request = shift;
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my $callback = shift;
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my $nodes = $request->{node};
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my $command = $request->{command}->[0];
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my $args = $request->{arg};
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my $rsp = {};
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if ($command eq "runbeginpre")
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{
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runbeginpre($nodes, $request, $callback);
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}
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else
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{
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if ($command eq "runendpre")
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{
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runendpre($nodes, $request, $callback)
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}
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else
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{
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my $rsp = {};
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$rsp->{data}->[0] =
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"Unknown command $command. Cannot process the command.";
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xCAT::MsgUtils->message("E", $rsp, $callback, 1);
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return;
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}
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}
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}
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#-------------------------------------------------------
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=head3 runbeginpre
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Runs all the begin scripts defined in prescripts.begin column for the give nodes.
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=cut
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#-------------------------------------------------------
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sub runbeginpre
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{
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my ($nodes, $request, $callback) = @_;
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my $args = $request->{arg};
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my $action=$args->[0];
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my $localhostname=hostname();
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my $installdir = xCAT::TableUtils->getInstallDir();
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my %script_hash=getprescripts($nodes, $action, "begin");
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foreach my $scripts (keys %script_hash) {
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my $runnodes=$script_hash{$scripts};
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if ($runnodes && (@$runnodes>0)) {
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my $runnodes_s=join(',', @$runnodes);
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#now run the scripts
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my @script_array=split(',', $scripts);
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foreach my $s (@script_array) {
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my $rsp = {};
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$rsp->{data}->[0]="$localhostname: Running begin script $s for nodes $runnodes_s.";
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$callback->($rsp);
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#check if the script need to be invoked for each node in parallel.
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#script must contian a line like this in order to be run this way: #xCAT setting: MAX_INSTANCE=4
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#where 4 is the maximum instance at a time
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my $max_instance=0;
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my $ret=`grep -E '#+xCAT setting: *MAX_INSTANCE=' $installdir/prescripts/$s`;
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if ($? == 0) {
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$max_instance=`echo "$ret" | cut -d= -f2`;
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chomp($max_instance);
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}
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if ($max_instance > 0) {
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#run the script for each node in paralell, no more than max_instance at a time
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run_script_single_node($installdir, $s,$action,$max_instance,$runnodes,$callback);
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} else {
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undef $SIG{CHLD};
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#pass all the nodes to the script, only invoke the script once
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my $ret=`NODES=$runnodes_s ACTION=$action $installdir/prescripts/$s 2>&1`;
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my $err_code=$?/256;
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if ($err_code != 0) {
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my $rsp = {};
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$rsp->{error}->[0]="$localhostname: $s: return code=$err_code. Error message=$ret";
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$callback->($rsp);
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if ($err_code > 1) { return $err_code; }
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} else {
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if ($ret) {
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my $rsp = {};
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$rsp->{data}->[0]="$localhostname: $s: $ret";
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$callback->($rsp);
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}
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}
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}
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}
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}
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}
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return;
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}
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#-------------------------------------------------------
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=head3 runendpre
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Runs all the begin scripts defined in prescripts.begin column for the give nodes.
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=cut
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#-------------------------------------------------------
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sub runendpre
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{
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my ($nodes, $request, $callback) = @_;
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my $args= $request->{arg};
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my $action=$args->[0];
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my $localhostname=hostname();
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my $installdir = xCAT::TableUtils->getInstallDir();
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my %script_hash=getprescripts($nodes, $action, "end");
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foreach my $scripts (keys %script_hash) {
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my $runnodes=$script_hash{$scripts};
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if ($runnodes && (@$runnodes>0)) {
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my $runnodes_s=join(',', @$runnodes);
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my %runnodes_hash=();
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#now run the scripts
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my @script_array=split(',', $scripts);
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foreach my $s (@script_array) {
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my $rsp = {};
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$rsp->{data}->[0]="$localhostname: Running end script $s for nodes $runnodes_s.";
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$callback->($rsp);
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#check if the script need to be invoked for each node in parallel.
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#script must contian a line like this in order to be run this way: #xCAT setting: MAX_INSTANCE=4
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#where 4 is the maximum instance at a time
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my $max_instance=0;
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my $ret=`grep -E '#+xCAT setting: *MAX_INSTANCE=' $installdir/prescripts/$s`;
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if ($? == 0) {
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$max_instance=`echo "$ret" | cut -d= -f2`;
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chomp($max_instance);
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}
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if ($max_instance > 0) {
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#run the script for each node in paralell, no more than max_instance at a time
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run_script_single_node($installdir, $s,$action,$max_instance,$runnodes,$callback);
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} else {
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undef $SIG{CHLD};
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my $ret=`NODES=$runnodes_s ACTION=$action $installdir/prescripts/$s 2>&1`;
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my $err_code=$?/256;
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if ($err_code != 0) {
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my $rsp = {};
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$rsp->{error}->[0]="$localhostname: $s: return code=$err_code. Error message=$ret";
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$callback->($rsp);
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if ($err_code > 1) { return $err_code; }
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} else {
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if ($ret) {
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my $rsp = {};
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$rsp->{data}->[0]="$localhostname: $s: $ret";
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$callback->($rsp);
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}
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}
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}
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}
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}
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}
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return;
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}
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#-------------------------------------------------------
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=head3 getprescripts
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get the prescripts for the given nodes and actions
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=cut
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#-------------------------------------------------------
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sub getprescripts
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{
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my ($nodes, $tmp_action, $colname) = @_;
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my @action_a=split('=',$tmp_action);
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my $action=$action_a[0];
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my %ret=();
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if ($nodes && (@$nodes>0)) {
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my $tab = xCAT::Table->new('prescripts',-create=>1);
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#first get xcatdefault column
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my $et = $tab->getAttribs({node=>"xcatdefaults"},$colname);
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my $tmp_def = $et->{$colname};
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my $defscripts;
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if ($tmp_def) {
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$defscripts=parseprescripts($tmp_def, $action);
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}
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#get scripts for the given nodes and
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#add the scripts from xcatdefault in front of the other scripts
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my $tabdata=$tab->getNodesAttribs($nodes,['node', $colname]);
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foreach my $node (@$nodes) {
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my $scripts_to_save=$defscripts;
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my %lookup=(); #so that we do not have to parse the same scripts more than once
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if ($tabdata && exists($tabdata->{$node})) {
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my $tmp=$tabdata->{$node}->[0];
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my $scripts=$tmp->{$colname};
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if ($scripts) {
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#parse the script. it is in the format of netboot:s1,s2|install:s3,s4 or just s1,s2
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if (!exists($lookup{$scripts})) {
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my $tmp_s=parseprescripts($scripts, $action);
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$lookup{$scripts}=$tmp_s;
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$scripts=$tmp_s;
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} else {
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$scripts=$lookup{$scripts};
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}
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#add the xcatdefaults
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if ($scripts_to_save && $scripts) {
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$scripts_to_save .= ",$scripts";
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} else {
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if ($scripts) { $scripts_to_save=$scripts; }
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}
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}
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}
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#save to the hash
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if ($scripts_to_save) {
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if (exists($ret{$scripts_to_save})) {
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my $pa=$ret{$scripts_to_save};
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push(@$pa, $node);
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}
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else {
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$ret{$scripts_to_save}=[$node];
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}
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}
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}
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}
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return %ret;
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}
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#-------------------------------------------------------
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=head3 parseprescripts
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Parse the prescript string and get the scripts for the given action out
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=cut
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#-------------------------------------------------------
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sub parseprescripts
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{
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my $scripts=shift;
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my $action=shift;
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my $ret;
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if ($scripts) {
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if ($scripts =~ /:/) {
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my @a=split(/\|/,$scripts);
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foreach my $token (@a) {
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#print "token=$token, action=$action\n";
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if ($token =~ /^$action:(.*)/) {
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$ret=$1;
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last;
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}
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}
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} else {
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$ret=$scripts;
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}
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}
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return $ret;
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}
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#-------------------------------------------------------
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=head3 run_script_single_node
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=cut
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#-------------------------------------------------------
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sub run_script_single_node
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{
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my $installdir=shift; #/install
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my $s=shift; #script name
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my $action=shift;
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my $max=shift; #max number of instances to be run at a time
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my $nodes=shift; #nodes to be run
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my $callback=shift; #callback
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my $children=0;
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my $localhostname=hostname();
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foreach my $node ( @$nodes ) {
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$SIG{CHLD} = sub { my $pid = 0; while (($pid = waitpid(-1, WNOHANG)) > 0) { $children--; } };
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while ( $children >= $max ) {
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Time::HiRes::sleep(0.5);
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next;
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}
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my $pid = xCAT::Utils->xfork;
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if ( !defined($pid) ) {
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# Fork error
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my $rsp = {};
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$rsp->{data}->[0]="$localhostname: Fork error before running script $s for node $node";
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$callback->($rsp);
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return 1;
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}
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elsif ( $pid == 0 ) {
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# Child process
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undef $SIG{CHLD};
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my $ret=`NODES=$node ACTION=$action $installdir/prescripts/$s 2>&1`;
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my $err_code=$?;
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my $rsp = {};
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if ($err_code != 0) {
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$rsp = {};
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$rsp->{error}->[0]="$localhostname: $s: node=$node. return code=$err_code. Error message=$ret";
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$callback->($rsp);
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} else {
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if ($ret) {
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$rsp->{data}->[0]="$localhostname: $s: node=$node. $ret";
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$callback->($rsp);
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}
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}
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exit $err_code;
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}
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else {
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# Parent process
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$children++;
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}
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}
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#drain one more time
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while ($children > 0) {
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Time::HiRes::sleep(0.5);
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$SIG{CHLD} = sub { my $pid = 0; while (($pid = waitpid(-1, WNOHANG)) > 0) { $children--; } };
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}
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return 0;
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}
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