xcat-core/perl-xCAT/xCAT/MsgUtils.pm
2014-09-11 13:12:56 -04:00

743 lines
22 KiB
Perl

#!/usr/bin/perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
package xCAT::MsgUtils;
# if AIX - make sure we include perl 5.8.2 in INC path.
# Needed to find perl dependencies shipped in deps tarball.
if ($^O =~ /^aix/i) {
unshift(@INC, qw(/usr/opt/perl5/lib/5.8.2/aix-thread-multi /usr/opt/perl5/lib/5.8.2 /usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi /usr/opt/perl5/lib/site_perl/5.8.2));
}
use strict;
use Sys::Syslog;
use xCAT::Utils;
#use locale;
use Socket;
use File::Path;
$::NOK = -1;
$::OK = 0;
#--------------------------------------------------------------------------------
=head1 xCAT::MsgUtils
=head2 Package Description
This program module file, supports the xcat messaging and logging
=cut
#--------------------------------------------------------------------------------
=head2 Package Dependancies
use strict;
use Fcntl qw(:flock);
use File::Basename;
use File::Find;
use File::Path; # Provides mkpath()
=cut
#--------------------------------------------------------------------------------
=head1 Subroutines
=cut
=head3 message
Display a msg STDOUT,STDERR,log a msg and/or return to callback function.
Arguments:
The arguments of the message() function are:
If address of the callback is provided,
then the message will be returned either
as data to the client's callback routine or to the
xcat daemon or Client.pm ( bypass) for display/logging.
See flags below.
If address of the callback is not provide, then
the message will be displayed to STDERR or STDOUT or
added to SYSLOG. See flags below.
If logging (L) is requested, the message structure
must be a simple string. The routine will convert
it to the appropriate callback structure, if a callback
is provided.
Note for logging xCAT:MsgUtils->start_logging and
xCAT:MstUtils->stop_logging must be used to
open and close the log.
For compatibility with existing code, the message routine will
move the data into the appropriate callback structure, if required.
See example below, if the input to the message routine
has the "data" structure filled in for an error message, then
the message routine will move the $rsp->{data}->[0] to
$rsp->{error}->[0]. This will allow xcatd/Client.pm will process
all but "data" messages.
The current client code should not have to change.
my %rsp;
$rsp->{data}->[0] = "Job did not run. \n";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK);
Here the message routine will move $rsp->{data}->[0] to
$rsp->{error}->[0], to match the "E"message code.
Note the message
routine will only check for the data to either exist in
$rsp->{error}->[0] already, or to exist in $rsp->{data}->[0].
Here's the meaning of the 1st character, if a callback specified:
D - DATA this is returned to the client callback routine
N - Node Data this is returned to the client callback routine
E - error this is displayed/logged by daemon/Client.pm.
I - informational this is displayed/logged by daemon/Client.pm.
S - Message will be logged to syslog ( severe error)
syslog facily (local4) and priority (err) will be used.
See /etc/syslog.conf file for the destination of the
messages.
Note S can be combined with other flags for example
SE logs message to syslog to also display the
message by daemon/ Client.pm.
V - verbose. This flag is not valid, the calling routine
should check for verbose mode before calling the message
routine and only use the I flag for the message.
If V flag is detected, it will be changed to an I flag.
W - warning this is displayed/logged by daemon/Client.pm.
L - Log error to xCAT Log on the local machine.
Routine must have setup log by calling
MsgUtils->start_log routine which returns
$::LOG_FILE_HANDLE. Log is closed with
MsgUtils->stop_log routine. Note can be combined with
other flags:
LS - Log to xCAT Log and Syslog
LSE/LSI - Log to xCAT Log and Syslog and display
if this option is used the message must be a simple
string. The message routine will format for callback
based on the (D,E,I,W) flag.
Here's the meaning of the 1st character, if no callback specified:
D - DATA goes to STDOUT
E - error. This type of message will be sent to STDERR.
si - informational status info (sinfo)
I - informational goes to STDOUT
N - Node informational goes to STDOUT
S - Message will be logged to syslog ( severe error)
Note S can be combined with other flags for example
SE logs message to syslog and is sent to STDERR.
SA logs message to syslog and to the auditlog DB table. (only xcatd)
A logs message auditlog DB table only. (only for xcatd)
V - verbose. This flag is not valid, the calling routine
should check for verbose mode before calling the message
routine and only use the I flag for the message.
If V flag is detected, it will be changed to an I flag.
W - warning goes to STDOUT.
L - log goes to /var/log/xcat/<logname>
( see MsgUtils->start_log)
Routine must have setup log by calling
MsgUtils->start_log routine which returns
$::LOG_FILE_HANDLE. Log is closed with
MsgUtils->stop_log routine. Note can be combined with
other flags:
LS - Log to xCAT Log and Syslog
LSE/LSI - Log to xCAT Log and Syslog and display
Returns:
none
Error:
none
Example:
Use with no callback
# Message to STDOUT
xCAT::MsgUtils->message('I', "Operation $value1 succeeded\n");
xCAT::MsgUtils->message('N', "Node:$node failed\n");
# Message to STDERR
xCAT::MsgUtils->message('E', "Operation $value1 failed\n");
# Message to Syslog
xCAT::MsgUtils->message('S', "Host $host not responding\n");
# Message to Syslog and auditlog table (only used by xcatd)
# see tabdump -d auditlog
my $rsp = {};
$rsp->{syslogdata}->[0] = "$host not responding\n"; # for syslog
# the next data is for auditlog table, audittime added below
$rsp->{userid} ->[0] = $user;
$rsp->{clientname} -> [0] = $client;
$rsp->{clienttype} -> [0] = $clienttype;
$rsp->{command} -> [0] = $command;
$rsp->{noderange} -> [0] = $noderange;
$rsp->{args} -> [0] = $arguments;
$rsp->{status} -> [0] = $status;
xCAT::MsgUtils->message('SA', $rsp);
# Message to only auditlog table (only used by xcatd)
# see tabdump -d auditlog
my $rsp = {};
$rsp->{userid} ->[0] = $user;
$rsp->{clientname} -> [0] = $client;
$rsp->{clienttype} -> [0] = $clienttype;
$rsp->{command} -> [0] = $command;
$rsp->{noderange} -> [0] = $noderange;
$rsp->{args} -> [0] = $arguments;
$rsp->{status} -> [0] = $status;
xCAT::MsgUtils->message('A', $rsp);
# Message to Log and Syslog
xCAT::MsgUtils->message('LS', "Host $host not responding\n");
# Message to Log
xCAT::MsgUtils->message('L', "Host $host not responding\n");
Use with callback
# Message to callback
my $rsp = {};
$rsp->{data}->[0] = "Job did not run. \n";
xCAT::MsgUtils->message("D", $rsp, $::CALLBACK);
my $rsp = {};
$rsp->{error}->[0] = "No hosts in node list\n";
xCAT::MsgUtils->message("E", $rsp, $::CALLBACK);
my $rsp = {};
$rsp->{node}->[0]->{name}->[0] ="mynode";
$rsp->{node}->[0]->{data}->[0] ="mydata";
xCAT::MsgUtils->message("N", $rsp, $callback);
my $rsp = {};
$rsp->{info}->[0] = "No hosts in node list\n";
xCAT::MsgUtils->message("I", $rsp, $::CALLBACK);
my $rsp = {};
$rsp->{sinfo}->[0] = "No hosts in node list\n";
xCAT::MsgUtils->message("IS", $rsp, $::CALLBACK);
my $rsp = {};
$rsp->{warning}->[0] = "No hosts in node list\n";
xCAT::MsgUtils->message("W", $rsp, $::CALLBACK);
my $rsp = {};
$rsp->{error}->[0] = "Host not responding\n";
xCAT::MsgUtils->message("S", $rsp, $::CALLBACK);
# Message to Syslog and callback
my $rsp = {};
$rsp->{error}->[0] = "Host not responding\n";
xCAT::MsgUtils->message("SE", $rsp, $::CALLBACK);
# Message to Syslog and callback
my $rsp = {};
$rsp->{info}->[0] = "Host not responding\n";
xCAT::MsgUtils->message("SI", $rsp, $::CALLBACK);
# Message to Log, Syslog and callback
my $msg;
$msg = "Host not responding\n";
xCAT::MsgUtils->message("LSI", $msg, $::CALLBACK);
# Message to Log and callback
my $msg;
$msg = "Host not responding\n";
xCAT::MsgUtils->message("LI", $msg, $::CALLBACK);
Comments:
Returns:
1 for internal error ( invalid input to the routine)
=cut
#--------------------------------------------------------------------------------
sub message
{
# Process the arguments
shift; # get rid of the class name
my $sev = shift;
my $rsp = shift;
my $call_back = shift; # optional
my $exitcode = shift; # optional
# should be I,IS, D, E, S, SA,A ,LS, W , L,N
# or S(I, D, E, S, W, L,N)
#
# if SA option need to split syslog messages from auditlog entry
#
my $newrsp;
if (($sev eq 'SA') || ($sev eq 'A'))
{ # if SA ( syslog and auditlog) or A ( only auditlog)then need to pull first entry from $rsp
# for syslog, to preserve old interface
$newrsp = $rsp;
$rsp = $newrsp->{syslogdata}->[0];
}
my $stdouterrf = \*STDOUT;
my $stdouterrd = '';
if ($sev =~ /[E]/)
{
$stdouterrf = \*STDERR;
$stdouterrd = '1>&2';
}
# check for logging
my $logging = 0;
if ($sev =~ /[L]/)
{
# no log opened, we have an error
if (!defined($::LOG_FILE_HANDLE))
{
if ($call_back)
{
# build callback structure
my $newrsp;
my $sevkey = 'error';
my $err =
"Logging requested without setting up log by calling xCAT:MsgUtils->start_logging.\n";
push @{$newrsp->{$sevkey}}, $err;
push @{$newrsp->{errorcode}}, "1";
$call_back->($newrsp); # send message to daemon/Client.pm
return 1;
}
else
{
print
"Logging requested without setting up log by calling xCAT:MsgUtils->start_logging.\n";
return 1;
}
}
else
{
$logging = 1;
}
}
if ($sev eq 'V')
{ # verbose should have been handled in calling routine
$sev = "I";
}
if ($sev eq 'SV')
{ # verbose should have been handled in calling routine
$sev = "SI";
}
# Check that correct structure is filled in. If the data is not in the
# structure corresponding to the $sev, then look for it in "data"
#TODO: this is not really right for a few reasons: 1) all the fields in the
# response structure are arrays, so can handle multiple lines of text. We
# should not just be check the 0th element. 2) a cmd may have both error
# text and data text. 3) this message() function should just take in a plain
# string and put it in the correct place based on the severity.
#
# if a callback routine is provided
#
if ($call_back)
{ # callback routine provided
my $sevkey;
if ($sev =~ /D/) { $sevkey = 'data'; }
elsif ($sev =~ /N/) { $sevkey = 'node'; }
elsif ($sev =~ /IS/) { $sevkey = 'sinfo'; }
elsif ($sev =~ /I/) { $sevkey = 'info'; }
elsif ($sev =~ /W/) { $sevkey = 'warning'; }
elsif ($sev =~ /E/)
{
$sevkey = 'error';
if (!defined($exitcode))
{
$exitcode = 1;
} # default to something non-zero
}
else
{
# build callback structure
my $newrsp;
my $sevkey = 'error';
my $err =
"Invalid or no severity code passed to MsgUtils::message().\n";
push @{$newrsp->{$sevkey}}, $err;
push @{$newrsp->{errorcode}}, "1";
$call_back->($newrsp); # send message to daemon/Client.pm
return 1;
}
# check if logging to xCAT log, must be handled
# separately because message data is a simple string
#
if (!$logging)
{
if ($sevkey ne 'data')
{
if (!defined($rsp->{$sevkey}) || !scalar(@{$rsp->{$sevkey}}))
{ # did not pass the text in in the severity-specific field
# so fix it
if (defined($rsp->{data}) && scalar(@{$rsp->{data}}))
{
push @{$rsp->{$sevkey}}, @{$rsp->{data}};
# assume they passed
# in the text in the data field instead
@{$rsp->{data}} = (); # clear out the data field
}
}
}
# if still nothing in the array, there is nothing to print out
if (!defined($rsp->{$sevkey}) || !scalar(@{$rsp->{$sevkey}}))
{
return;
}
if (defined($exitcode))
{
push @{$rsp->{errorcode}}, $exitcode;
}
$call_back->($rsp); # send message to daemon/Client.pm
@{$rsp->{$sevkey}} =
(); # clear out the rsp structure in case they use it again
@{$rsp->{data}} = ();
@{$rsp->{errorcode}} = ();
}
else # logging
{
# write to log
print $::LOG_FILE_HANDLE $rsp;
# build callback structure
my $newrsp;
push @{$newrsp->{$sevkey}}, $rsp;
if ($exitcode)
{
push @{$newrsp->{errorcode}}, $exitcode;
}
$call_back->($newrsp); # send message to daemon/Client.pm
}
}
else # no callback provided
{
if ($logging)
{ # print to local xcat log
print $::LOG_FILE_HANDLE $rsp;
}
else
{ # print to stdout
print $stdouterrf $rsp . "\n"; # print the message
}
}
# is syslog option requested
if ($sev =~ /S/)
{
# If they want this msg to also go to syslog, do that now
eval {
openlog("xCAT", "nofatal,pid", "local4");
if ($sev eq 'SE') {
syslog("err", $rsp);
} else {
syslog("info", $rsp);
}
closelog();
};
my $errstr = $@;
if ($errstr)
{
print $stdouterrf
"Unable to log $rsp to syslog because of $errstr\n";
}
}
# if write to auditlog table requested, if not on service node
if (xCAT::Utils->isMN()){
if (($sev eq 'SA') || ($sev eq 'A'))
{
require xCAT::Table;
my $auditlogentry;
my $tab = xCAT::Table->new("auditlog");
if ($tab)
{
my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) =
localtime(time);
my $currtime = sprintf("%04d-%02d-%02d %02d:%02d:%02d",
$year + 1900, $mon + 1, $mday,
$hour, $min, $sec);
$auditlogentry->{audittime} = $currtime;
$auditlogentry->{userid} = $newrsp->{userid}->[0];
$auditlogentry->{clientname} = $newrsp->{clientname}->[0];
$auditlogentry->{clienttype} = $newrsp->{clienttype}->[0];
$auditlogentry->{command} = $newrsp->{command}->[0];
$auditlogentry->{noderange} = $newrsp->{noderange}->[0];
$auditlogentry->{args} = $newrsp->{args}->[0];
$auditlogentry->{status} = $newrsp->{status}->[0];
my @ret = $tab->setAttribs(undef, $auditlogentry);
if (@ret > 1)
{
print $stdouterrf "Unable to open auditlog\n";
eval {
openlog("xCAT", "nofatal,pid", "local4");
syslog("err", "Unable to write to auditlog");
closelog();
};
}
else
{
my $DBname = xCAT::Utils->get_DBName;
if (!($DBname =~ /^SQLITE/)) {
$tab->commit;
}
}
}
else
{ # error
print $stdouterrf "Unable to open auditlog\n";
eval {
openlog("xCAT", "nofatal,pid", "local4");
syslog("err", "Unable to open auditlog");
closelog();
};
}
}
}
return;
}
#--------------------------------------------------------------------------------
=head2 xCAT Logging Routines
To use xCAT Logging follow the following sample
my $rc=xCAT::MsgUtils->start_logging("mylogname"); # create/open log
.
.
.
# Message to Log and callback
my $msg;
$msg = "Host not responding\n";
xCAT::MsgUtils->message("LI", $msg, $::CALLBACK);
.
.
# Message to Log
my $msg;
$msg = "Host not responding\n";
xCAT::MsgUtils->message("L", $msg);
.
my $rc=xCAT::MsgUtils->stop_logging(); # close log
=cut
#--------------------------------------------------------------------------------
=head3 start_logging
Start logging messages to a logfile. Return the log file handle so it
can be used for updates and to close the file when done logging
using stop_logging.
Arguments:
$logfilename ( just name, path is by default /var/log/xcat)
Returns:
$::LOG_FILE_HANDLE
Globals:
$::LOG_FILE_HANDLE
Error:
$::NOK
Example:
xCAT:Utils->start_logging("logname");
=cut
#--------------------------------------------------------------------------------
sub start_logging
{
my ($class, $logfilename) = @_;
my ($cmd, $rc);
my $xCATLogDir = "/var/log/xcat/";
my $logfile = $xCATLogDir;
$logfile .= $logfilename;
xCAT::MsgUtils->backup_logfile($logfile);
# create the log directory if it's not already there
if (!-d $xCATLogDir)
{
$cmd = "mkdir -m 644 -p $xCATLogDir";
$rc = system("$cmd");
if ($rc >> 8)
{
xCAT::MsgUtils->message('SE', "Error running $cmd.\n");
return ($::NOK);
}
}
# open the log file
unless (open(LOGFILE, ">>$logfile"))
{
# Cannot open file
xCAT::MsgUtils->message('SE', "Error opening $logfile.\n");
return ($::NOK);
}
$::LOG_FILE_HANDLE = \*LOGFILE;
$::LOG_FILE_NAME = $logfile;
# Make the file to be unbuffered
binmode( $::LOG_FILE_HANDLE, ":unix" );
# Print the program name and date to the top of the logfile
my $sdate = `/bin/date`;
chomp $sdate;
my $program = $0;
xCAT::MsgUtils->message('L', "$program:logging started $sdate.\n");
return ($::LOG_FILE_HANDLE);
}
#--------------------------------------------------------------------------------
=head3 stop_logging
Turn off message logging. Routine expects to have a file handle
passed in via the global $::LOG_FILE_HANDLE.
Arguments:
Returns:
$::OK
Globals:
$::LOG_FILE_HANDLE
Error:
none
Example:
MsgUtils->stop_logging();
Comments:
closes the logfile and undefines $::LOG_FILE_HANDLE
even on error.
=cut
#--------------------------------------------------------------------------------
sub stop_logging
{
my ($class) = @_;
if (defined($::LOG_FILE_HANDLE))
{
# Print the date at the bottom of the logfile
my $sdate = `/bin/date`;
chomp $sdate;
my $program = $0;
xCAT::MsgUtils->message('L', "$program:logging stopped $sdate.\n");
close($::LOG_FILE_HANDLE);
undef $::LOG_FILE_HANDLE;
}
return $::OK;
}
#--------------------------------------------------------------------------------
=head3 backup_logfile
Backup the current logfile. Move logfile to logfile.1.
Shift all other logfiles
(logfile.[1-3]) up one number. The original logfile.4 is removed as in a FIFO.
Arguments:
$logfile ( full path)
Returns:
$::OK
Error:
undefined
Example:
xCAT::MsgUtils->backup_logfile($logfile);
=cut
#--------------------------------------------------------------------------------
sub backup_logfile
{
my ($class, $logfile) = @_;
my ($logfile1) = $logfile . ".1";
my ($logfile2) = $logfile . ".2";
my ($logfile3) = $logfile . ".3";
my ($logfile4) = $logfile . ".4";
if (-f $logfile)
{
rename($logfile3, $logfile4) if (-f $logfile3);
rename($logfile2, $logfile3) if (-f $logfile2);
rename($logfile1, $logfile2) if (-f $logfile1);
rename($logfile, $logfile1);
}
return $::OK;
}
sub verbose_message
{
shift;
my $req = shift;
my $data = shift;
if (!defined($req->{verbose})) {
return;
}
my ($sec,$min,$hour,$mday,$mon,$yr,$wday,$yday,$dst) = localtime(time);
my $time = sprintf "%04d%02d%02d.%02d:%02d:%02d", $yr+1900,$mon+1,$mday,$hour,$min,$sec;
$data = "$time ($$) ".$data;
if (defined($req->{callback})) {
my %rsp;
$rsp{data} = [$data];
xCAT::MsgUtils->message("I", \%rsp, $req->{callback});
} else {
xCAT::MsgUtils->message("I", $data);
}
}
1;