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support invoking prescripts once for each nodes at the same time

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git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@5690 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
This commit is contained in:
linggao
2010-04-06 19:47:13 +00:00
parent 97e04e1302
commit 09c63c2383
3 changed files with 147 additions and 36 deletions
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15
perl-xCAT/xCAT/Schema.pm
View File

@@ -846,18 +846,25 @@ prescripts => {
# Do not put description text past column 88, so it displays well in a 100 char wide window.
# ----------------------------------------------------------------------------------|
begin =>
"The scripts to be run at the beginning of the nodeset (Linux) command.\n\n".
"The scripts to be run at the beginning of the nodeset (Linux) command.\n".
" The format is:\n".
" [action1:]s1,s2...[|action2:s3,s4,s5...]\n".
" where:\n".
" - action1 and action2 are the nodeset/nimnodeset actions specified in the command\n".
" - s1 and s2 are the scripts to run for action1 in order\n".
" - s3, s4, and s5 are the scripts to run for actions2\n\n".
" - s3, s4, and s5 are the scripts to run for actions2\n".
" If actions are omitted, the scripts apply to all actions.\n".
" All the scripts should be copied to /install/prescripts directory.\n\n".
" Examples:\n".
" myscript1,myscript2\n".
" install:myscript1,myscript2|netboot:myscript3",
" install:myscript1,myscript2|netboot:myscript3\n\n".
" All the scripts should be copied to /install/prescripts directory.\n".
" The following two environment variables will be passed to each script: \n".
" NODES a coma separated list of node names that need to run the script for\n".
" ACTION current nodeset action.\n\n".
" If '#xCAT setting:MAX_INSTANCE=number' is specified in the script, the script\n".
" will get invoked for each node in parallel, but no more than number of instances\n".
" will be invoked at at a time. If it is not sepcified, the script will be invoked\n".
" once for all the nodes.\n",
end => "The scripts to be run at the end of the nodeset (Linux) command. The format is the same as the 'begin' column.",
comments => 'Any user-written notes.',
disable => "Set to 'yes' or '1' to comment out this row.",

3
xCAT-client/pods/man8/nodeset.8.pod
View File

@@ -30,7 +30,8 @@ B<nodeset> only sets the next boot state, but does not reboot.
B<nodeset> is called by rinstall and winstall and is also called by the
installation process remotely to set the boot state back to "boot".
User can supply their own scripts to be run on the mn or on the service node (if their is hierarchy) for a node during the nodeset command. Such scripts are called B<prescripts>. They should be copied to /install/prescripts dirctory. A table called I<prescripts> is used to specify the scripts and their associated actions. The scripts to be run at the beginning of the nodeset command are stored in the 'begin' column of I<prescripts> table. The scripts to be run at the end of the noodeset command are stored in the 'end' column of I<prescripts> table. Please run 'tabdump prescripts -d' command for details. The following two environment variables will be passed to each script: NODES contains all the names of the nodes that need to run the script for and ACTION contains the current nodeset action.
User can supply their own scripts to be run on the mn or on the service node (if their is hierarchy) for a node during the nodeset command. Such scripts are called B<prescripts>. They should be copied to /install/prescripts dirctory. A table called I<prescripts> is used to specify the scripts and their associated actions. The scripts to be run at the beginning of the nodeset command are stored in the 'begin' column of I<prescripts> table. The scripts to be run at the end of the noodeset command are stored in the 'end' column of I<prescripts> table. Please run 'tabdump prescripts -d' command for details. The following two environment variables will be passed to each script: NODES contains all the names of the nodes that need to run the script for and ACTION contains the current nodeset action. If I<#xCAT setting:MAX_INSTANCE=number> is specified in the script, the script will get invoked for each node in parallel, but no more than I<number> of instances will be invoked at at a time. If it is not sepcified, the script will be invoked once for all the nodes.
=head1 B<Options>

165
xCAT-server/lib/xcat/plugins/prescripts.pm
View File

@@ -11,6 +11,10 @@ require xCAT::Utils;
require xCAT::MsgUtils;
use Getopt::Long;
use Sys::Hostname;
use Time::HiRes qw(gettimeofday sleep);
use POSIX "WNOHANG";
1;
#-------------------------------------------------------
@@ -158,26 +162,43 @@ sub runbeginpre
my $runnodes=$script_hash{$scripts};
if ($runnodes && (@$runnodes>0)) {
my $runnodes_s=join(',', @$runnodes);
my $rsp = {};
$rsp->{data}->[0]="$localhostname: Running begin scripts $scripts for nodes $runnodes_s.";
$callback->($rsp);
#now run the scripts
undef $SIG{CHLD};
my @script_array=split(',', $scripts);
foreach my $s (@script_array) {
my $ret=`NODES=$runnodes_s ACTION=$action $installdir/prescripts/$s 2>&1`;
my $err_code=$?;
if ($ret) {
my $rsp = {};
$rsp->{data}->[0]="$localhostname: $s: $ret";
$callback->($rsp);
my $rsp = {};
$rsp->{data}->[0]="$localhostname: Running begin script $s for nodes $runnodes_s.";
$callback->($rsp);
#check if the script need to be invoked for each node in parallel.
#script must contian a line like this in order to be run this way: #xCAT setting: MAX_INSTANCE=4
#where 4 is the maximum instance at a time
my $max_instance=0;
my $ret=`grep -E '#+xCAT setting: *MAX_INSTANCE=' $installdir/prescripts/$s`;
if ($? == 0) {
$max_instance=`echo "$ret" | cut -d= -f2`;
chomp($max_instance);
}
if ($err_code != 0) {
$rsp = {};
$rsp->{error}->[0]="$localhostname: $s: return code=$err_code. Error message=$ret";
$callback->($rsp);
#last;
if ($max_instance > 0) {
#run the script for each node in paralell, no more than max_instance at a time
run_script_single_node($installdir, $s,$action,$max_instance,$runnodes,$callback);
} else {
undef $SIG{CHLD};
#pass all the nodes to the script, only invoke the script once
my $ret=`NODES=$runnodes_s ACTION=$action $installdir/prescripts/$s 2>&1`;
my $err_code=$?;
if ($err_code != 0) {
my $rsp = {};
$rsp->{error}->[0]="$localhostname: $s: return code=$err_code. Error message=$ret";
$callback->($rsp);
} else {
if ($ret) {
my $rsp = {};
$rsp->{data}->[0]="$localhostname: $s: $ret";
$callback->($rsp);
}
}
}
}
}
@@ -206,26 +227,41 @@ sub runendpre
my $runnodes_s=join(',', @$runnodes);
my %runnodes_hash=();
my $rsp = {};
$rsp->{data}->[0]="$localhostname: Running end scripts $scripts for nodes $runnodes_s.";
$callback->($rsp);
#now run the scripts
undef $SIG{CHLD};
my @script_array=split(',', $scripts);
foreach my $s (@script_array) {
my $ret=`NODES=$runnodes_s ACTION=$action $installdir/prescripts/$s 2>&1`;
my $err_code=$?;
if ($ret) {
my $rsp = {};
$rsp->{data}->[0]="$localhostname: $s: $ret";
$callback->($rsp);
my $rsp = {};
$rsp->{data}->[0]="$localhostname: Running end script $s for nodes $runnodes_s.";
$callback->($rsp);
#check if the script need to be invoked for each node in parallel.
#script must contian a line like this in order to be run this way: #xCAT setting: MAX_INSTANCE=4
#where 4 is the maximum instance at a time
my $max_instance=0;
my $ret=`grep -E '#+xCAT setting: *MAX_INSTANCE=' $installdir/prescripts/$s`;
if ($? == 0) {
$max_instance=`echo "$ret" | cut -d= -f2`;
chomp($max_instance);
}
if ($err_code != 0) {
$rsp = {};
$rsp->{error}->[0]="$localhostname: $s: return code=$err_code. Error message=$ret";
$callback->($rsp);
#last;
if ($max_instance > 0) {
#run the script for each node in paralell, no more than max_instance at a time
run_script_single_node($installdir, $s,$action,$max_instance,$runnodes,$callback);
} else {
undef $SIG{CHLD};
my $ret=`NODES=$runnodes_s ACTION=$action $installdir/prescripts/$s 2>&1`;
my $err_code=$?;
if ($err_code != 0) {
my $rsp = {};
$rsp->{error}->[0]="$localhostname: $s: return code=$err_code. Error message=$ret";
$callback->($rsp);
} else {
if ($ret) {
my $rsp = {};
$rsp->{data}->[0]="$localhostname: $s: $ret";
$callback->($rsp);
}
}
}
}
}
@@ -324,3 +360,70 @@ sub parseprescripts
}
return $ret;
}
#-------------------------------------------------------
=head3 run_script_single_node
=cut
#-------------------------------------------------------
sub run_script_single_node
{
my $installdir=shift; #/install
my $s=shift; #script name
my $action=shift;
my $max=shift; #max number of instances to be run at a time
my $nodes=shift; #nodes to be run
my $callback=shift; #callback
my $children=0;
my $localhostname=hostname();
foreach my $node ( @$nodes ) {
$SIG{CHLD} = sub { my $pid = 0; while (($pid = waitpid(-1, WNOHANG)) > 0) { $children--; } };
while ( $children >= $max ) {
Time::HiRes::sleep(0.5);
next;
}
my $pid = xCAT::Utils->xfork;
if ( !defined($pid) ) {
# Fork error
my $rsp = {};
$rsp->{data}->[0]="$localhostname: Fork error before running script $s for node $node";
$callback->($rsp);
return 1;
}
elsif ( $pid == 0 ) {
# Child process
undef $SIG{CHLD};
my $ret=`NODES=$node ACTION=$action $installdir/prescripts/$s 2>&1`;
my $err_code=$?;
my $rsp = {};
if ($err_code != 0) {
$rsp = {};
$rsp->{error}->[0]="$localhostname: $s: node=$node. return code=$err_code. Error message=$ret";
$callback->($rsp);
} else {
if ($ret) {
$rsp->{data}->[0]="$localhostname: $s: node=$node. $ret";
$callback->($rsp);
}
}
exit $err_code;
}
else {
# Parent process
$children++;
}
}
#drain one more time
while ($children > 0) {
Time::HiRes::sleep(0.5);
$SIG{CHLD} = sub { my $pid = 0; while (($pid = waitpid(-1, WNOHANG)) > 0) { $children--; } };
}
return 0;
}