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Re: [Linux-cluster] SNMP modules?



ok, here's the patch for ibm blade fencing agent...
qlogic sanbox2, comming up next :)

On Mon, 2004-07-26 at 19:08, Lazar Obradovic wrote: 
> Hello all, 
> 
> I'd like to develop my own fencing agents (for IBM BladeCenter and
> QLogic SANBox2 switches), but they will require SNMP bindings.
> 
> Is that ok with general development philosophy, since I'd like to
> contribude them? net-snmp-5.x.x-based API? 

-- 
Lazar Obradovic, System Engineer
----- 
laza YU net
YUnet International http://www.EUnet.yu
Dubrovacka 35/III, 11000 Belgrade
Tel: +381 11 3119901; Fax: +381 11 3119901
-----
This e-mail is confidential and intended only for the recipient.
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contents is prohibited. If you have received this e-mail in error,
please notify the sender by telephone +381 11 3119901.
-----
diff -urN old-cluster/fence/agents/Makefile cluster/fence/agents/Makefile
--- old-cluster/fence/agents/Makefile	2004-06-24 10:53:11.000000000 +0200
+++ cluster/fence/agents/Makefile	2004-07-30 01:06:44.291020208 +0200
@@ -25,6 +25,7 @@
 	cd wti && ${MAKE} all
 	cd xcat && ${MAKE} all
 	cd zvm && ${MAKE} all
+	cd ibmblade && ${MAKE} all
 
 copytobin:
 	cd apc && ${MAKE} copytobin
@@ -39,6 +40,7 @@
 	cd wti && ${MAKE} copytobin
 	cd xcat && ${MAKE} copytobin
 	cd zvm && ${MAKE} copytobin
+	cd ibmblade && ${MAKE} copytobin
 
 clean:
 	cd apc && ${MAKE} clean
@@ -53,4 +55,5 @@
 	cd wti && ${MAKE} clean
 	cd xcat && ${MAKE} clean
 	cd zvm && ${MAKE} clean
+	cd ibmblade && ${MAKE} clean
 
diff -urN old-cluster/fence/agents/ibmblade/Makefile cluster/fence/agents/ibmblade/Makefile
--- old-cluster/fence/agents/ibmblade/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ cluster/fence/agents/ibmblade/Makefile	2004-07-30 01:07:42.799125624 +0200
@@ -0,0 +1,37 @@
+###############################################################################
+###############################################################################
+##
+##  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
+##  Copyright (C) 2004 Red Hat, Inc.  All rights reserved.
+##  
+##  This copyrighted material is made available to anyone wishing to use,
+##  modify, copy, or redistribute it subject to the terms and conditions
+##  of the GNU General Public License v.2.
+##
+###############################################################################
+###############################################################################
+
+SOURCE= fence_ibmblade.pl
+TARGET= fence_ibmblade
+
+top_srcdir=../..
+include ${top_srcdir}/make/defines.mk
+
+all: $(TARGET)
+
+$(TARGET): $(SOURCE)
+	: > $(TARGET)
+	awk "{print}(\$$1 ~ /#BEGIN_VERSION_GENERATION/){exit 0}" $(SOURCE) >> $(TARGET)
+	echo "\$$FENCE_RELEASE_NAME=\"${RELEASE}\";" >> $(TARGET)
+	${top_srcdir}/scripts/define2var ${top_srcdir}/config/copyright.cf perl REDHAT_COPYRIGHT >> $(TARGET)
+	echo "\$$BUILD_DATE=\"(built `date`)\";" >> $(TARGET)
+	awk -v p=0 "(\$$1 ~ /#END_VERSION_GENERATION/){p = 1} {if(p==1)print}" $(SOURCE) >> $(TARGET)
+	chmod +x $(TARGET)
+
+copytobin: ${TARGET}
+	cp ${TARGET} ${top_srcdir}/bin/${TARGET}
+
+clean:
+	rm -f $(TARGET)
+
+
diff -urN old-cluster/fence/agents/ibmblade/fence_ibmblade.pl cluster/fence/agents/ibmblade/fence_ibmblade.pl
--- old-cluster/fence/agents/ibmblade/fence_ibmblade.pl	1970-01-01 01:00:00.000000000 +0100
+++ cluster/fence/agents/ibmblade/fence_ibmblade.pl	2004-08-01 18:43:28.350545072 +0200
@@ -0,0 +1,279 @@
+#!/usr/bin/perl
+
+###############################################################################
+###############################################################################
+##
+##  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
+##  Copyright (C) 2004 Red Hat, Inc.  All rights reserved.
+##
+##  This copyrighted material is made available to anyone wishing to use,
+##  modify, copy, or redistribute it subject to the terms and conditions
+##  of the GNU General Public License v.2.
+##
+###############################################################################
+###############################################################################
+
+use Getopt::Std;
+use Net::SNMP; 
+
+# Get the program name from $0 and strip directory names
+$_=$0;
+s/.*\///;
+my $pname = $_;
+
+my $sleep_time = 5; 
+my $snmp_timeout = 10;
+$opt_o = "reboot";
+
+my $oid_powerState =  ".1.3.6.1.4.1.2.3.51.2.22.1.5.1.1.4";    # remoteControlBladePowerState
+my $oid_powerChange = ".1.3.6.1.4.1.2.3.51.2.22.1.6.1.1.7";    # powerOnOffBlade
+my $oid_resetPower =  ".1.3.6.1.4.1.2.3.51.2.22.1.6.1.1.8";    # restartBlade
+
+# WARNING!! Do not add code bewteen "#BEGIN_VERSION_GENERATION" and
+# "#END_VERSION_GENERATION"  It is generated by the Makefile
+
+#BEGIN_VERSION_GENERATION
+$FENCE_RELEASE_NAME="";
+$REDHAT_COPYRIGHT="";
+$BUILD_DATE="";
+#END_VERSION_GENERATION
+
+sub usage
+{
+    print "Usage:\n";
+    print "\n";
+    print "$pname [options]\n";
+    print "\n";
+    print "Options:\n";
+    print "  -a <ip>          IP address or hostname of BladeCenter\n";
+    print "  -h               usage\n";
+    print "  -c <community>   SNMP Community\n";
+    print "  -n <num>         Port number to disable\n";
+    print "  -o <string>      Action:  Reboot (default), On or Off\n";
+    print "  -q               quiet mode\n";
+    print "  -t               test power state\n"; 
+    print "  -V               version\n";
+
+    exit 0;
+}
+
+sub fail_usage
+{
+  ($msg)= _;
+  print STDERR $msg."\n" if $msg;
+  print STDERR "Please use '-h' for usage.\n";
+  exit 1;
+}
+
+sub fail
+{
+  ($msg) = @_;
+  print $msg."\n" unless defined $opt_q;
+  $t->close if defined $t;
+  exit 1;
+}
+
+sub version
+{
+  print "$pname $FENCE_RELEASE_NAME $BUILD_DATE\n";
+  print "$REDHAT_COPYRIGHT\n" if ( $REDHAT_COPYRIGHT );
+
+  exit 0;
+}
+
+sub get_options_stdin
+{
+    my $opt;
+    my $line = 0;
+    while( defined($in = <>) )
+    {
+        $_ = $in;
+        chomp;
+
+	# strip leading and trailing whitespace
+        s/^\s*//;
+        s/\s*$//;
+
+	# skip comments
+        next if /^#/;
+
+        $line+=1;
+        $opt=$_;
+        next unless $opt;
+
+        ($name,$val)=split /\s*=\s*/, $opt;
+
+        if ( $name eq "" )
+        {  
+           print STDERR "parse error: illegal name in option $line\n";
+           exit 2;
+	}
+	
+        # DO NOTHING -- this field is used by fenced
+	elsif ($name eq "agent" ) { } 
+
+	# FIXME -- depricated.  use "port" instead.
+        elsif ($name eq "fm" ) 
+	{
+            (my $dummy,$opt_n) = split /\s+/,$val;
+	    print STDERR "Depricated \"fm\" entry detected.  refer to man page.\n";
+	}
+
+        elsif ($name eq "ipaddr" ) 
+	{
+            $opt_a = $val;
+        } 
+	elsif ($name eq "community" ) 
+	{
+            $opt_c = $val;
+        } 
+	# FIXME -- depreicated residue of old fencing system
+	elsif ($name eq "name" ) { } 
+
+        elsif ($name eq "option" )
+        {
+            $opt_o = $val;
+        }
+	elsif ($name eq "port" ) 
+	{
+            $opt_n = $val;
+        } 
+
+        # FIXME should we do more error checking?  
+        # Excess name/vals will be eaten for now
+	else 
+	{
+           fail "parse error: unknown option \"$opt\"";
+        }
+    }
+}
+
+# ---------------------------- MAIN --------------------------------
+
+if (@ARGV > 0) {
+   getopts("a:hc:n:o:qtV") || fail_usage ;
+
+   usage if defined $opt_h;
+   version if defined $opt_V;
+
+   fail_usage "Unknown parameter." if (@ARGV > 0);
+
+   fail_usage "No '-a' flag specified." unless defined $opt_a;
+   fail_usage "No '-n' flag specified." unless defined $opt_n;
+   fail_usage "No '-c' flag specified." unless defined $opt_c;
+   fail_usage "Unrecognised action '$opt_o' for '-o' flag"
+      unless $opt_o =~ /^(reboot|on|off)$/i;
+
+} else {
+   get_options_stdin();
+
+   fail "failed: no IP address" unless defined $opt_a;
+   fail "failed: no plug number" unless defined $opt_n;
+   fail "failed: no SNMP community" unless defined $opt_c;
+   fail "failed: unrecognised action: $opt_o"
+      unless $opt_o =~ /^(reboot|on|off)$/i;
+}
+
+my ($snmpsess, $error) = Net::SNMP->session ( 
+	-hostname   => $opt_a, 
+	-version    => "snmpv1", 
+	-community  => $opt_c,
+	-timeout    => $snmp_timeout); 
+
+if (!defined ($snmpsess)) { 
+	printf("$FENCE_RELEASE_NAME ERROR: %s.\n", $error);
+	exit 1; 
+};
+
+# first check in what state are we now
+my $oid = $oid_powerState . "." . $opt_n;
+my $oid_val = ""; 
+my $result = $snmpsess->get_request ( 
+	-varbindlist => [$oid]
+);
+if (!defined($result)) {
+	printf("$FENCE_RELEASE_NAME ERROR: %s.\n", $snmpsess->error);
+	$snmpsess->close;
+	exit 1;
+}
+
+if (defined ($opt_t)) { 
+	printf ("$FENCE_RELEASE_NAME STATE: Port %d on %s returned %d\n", $opt_n, $opt_a, $result->{$oid}); 
+	exit 1; 
+};
+
+if ($opt_o =~ /^(reboot|off)$/i) { 
+	if ($result->{$oid} == "0") { 
+		printf ("$FENCE_RELEASE_NAME ERROR: Port %d on %s already down.\n", $opt_n, $opt_a); 
+		$snmpsess->close; 
+		exit 1; 
+	}; 
+} else { 
+	if ($result->{$oid} == "1") { 
+		printf ("$FENCE_RELEASE_NAME ERROR: Port %d on %s already up.\n", $opt_n, $opt_a); 
+		$snmpsess->close; 
+		exit 1; 
+	};
+};
+
+# excellent, now change the state 
+if ($opt_o =~ /^reboot$/i) { 
+	# reboot
+	$oid = $oid_resetPower . "." . $opt_n;
+	$oid_val = "1"; 
+} elsif ($opt_o =~ /^on$/i) { 
+	# power on
+	$oid = $oid_powerChange . "." . $opt_n; 
+	$oid_val = "1"; 
+} else { 
+	# power down
+	$oid = $oid_powerChange . "." . $opt_n; 
+	$oid_val = "0"; 
+};
+
+$result = $snmpsess->set_request (
+	-varbindlist => [$oid, INTEGER, $oid_val]
+); 
+
+if (!defined ($result)) { 
+	# ignore this for now, seems like IBM BladeCenter has a broken SNMPd
+	# it almost always timeouts
+}; 
+
+# now, wait a bit and see if we have done it
+sleep($sleep_time); 
+
+$oid = $oid_powerState . "." . $opt_n;
+
+undef $result; 
+$result = $snmpsess->get_request ( 
+	-varbindlist => [$oid]
+);
+
+if (!defined($result)) {
+	# this is a real error
+	printf("$FENCE_RELEASE_NAME ERROR: %s.\n", $snmpsess->error);
+	$snmpsess->close;
+	exit 1;
+}; 
+
+if ($opt_o =~ /^(off)$/i) { 
+	if ($result->{$oid} == "1") { 
+		printf ("$FENCE_RELEASE_NAME ERROR: Port %d on %s still up.\n", $opt_n, $opt_a); 
+		$snmpsess->close; 
+		exit 1; 
+	}; 
+} else { 
+	if ($result->{$oid} == "0") { 
+		printf ("$FENCE_RELEASE_NAME ERROR: Port %d on %s still down.\n", $opt_n, $opt_a); 
+		$snmpsess->close; 
+		exit 1; 
+	};
+};
+
+# everything's a ok :) 
+$snmpsess->close; 
+
+printf ("$FENCE_RELEASE_NAME SUCCESS: Port %d on %s changed state to %s\n", $opt_n, $opt_a, $opt_o) unless defined $opt_q;
+exit 0; 
+
diff -urN old-cluster/fence/man/Makefile cluster/fence/man/Makefile
--- old-cluster/fence/man/Makefile	2004-06-24 10:53:20.000000000 +0200
+++ cluster/fence/man/Makefile	2004-08-01 18:30:42.213015680 +0200
@@ -26,7 +26,8 @@
 	fence_vixel.8 \
 	fence_wti.8 \
 	fence_xcat.8 \
-	fence_zvm.8
+	fence_zvm.8 \
+	fence_ibmblade.8
 
 UNINSTALL=${top_srcdir}/scripts/uninstall.pl
diff -urN old-cluster/fence/man/fence_ibmblade.8 cluster/fence/man/fence_ibmblade.8
--- old-cluster/fence/man/fence_ibmblade.8	1970-01-01 01:00:00.000000000 +0100
+++ cluster/fence/man/fence_ibmblade.8	2004-08-01 18:30:02.177102064 +0200
@@ -0,0 +1,103 @@
+.\"  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
+.\"  Copyright (C) 2004 Red Hat, Inc.  All rights reserved.
+.\"  
+.\"  This copyrighted material is made available to anyone wishing to use,
+.\"  modify, copy, or redistribute it subject to the terms and conditions
+.\"  of the GNU General Public License v.2.
+
+.tl 'fence_ibmblade(8)''fence_ibmblade(8)'
+
+\fBNAME\fP
+.in +7
+fence_ibmblade - I/O Fencing agent for IBM BladeCenter 
+
+.in
+\fBSYNOPSIS\fP
+.in +7
+\fBfence_ibmblade -a\fP \fIIPaddress\fR \fB-c\fP \fIcommunity\fR \fB-n\fP \fIport\fR \fB-o\fP \fIaction\fR
+
+.in
+.sp
+\fBDESCRIPTION\fP
+.in +7
+fence_ibmblade is an I/O Fencing agent which can be used with IBM BladeCenter 
+chassis. It issues SNMP Set request to BladeCenter chassins, rebooting, powering
+up or down the specified Blade Server. 
+.sp
+fence_ibmblade accepts options on the command line as well as from stdin.
+fenced sends parameters through stdin when it execs the agent.  fence_ibmblade 
+can be run by itself with command line options which is useful for testing.
+.sp
+.in
+\fBOPTIONS\fP
+.in
+\fB-a\fP \fIIPaddress\fP
+.in +7 
+IP address of the BladeCenter chassis. 
+.sp
+.in
+\fB-h\fP
+.in +7
+Print out a help message describing available options, then exit.
+.sp
+.in
+\fB-c\fP \fIcommunity\fP
+.in +7
+SNMP community string to use.
+.sp
+.in
+\fB-n\fP \fIport\fP
+.in +7
+The Blade port number to disable.
+.in
+.sp
+\fB-o\fP \fIaction\fP
+.in +7
+The action required.  Reboot (default), On or off.
+.in
+.sp
+\fB-q\fP
+.in +7
+Quiet mode: print only error messages.
+.sp
+.in
+\fB-V\fP
+.in +7
+Print out a version message, then exit.
+.sp
+.in
+
+.in -7
+\fBSTDIN PARAMETERS\fP
+.in
+
+\fI agent = < param >\fR
+.sp
+This option is used by fence_node(8) and is ignored by fence_ibmblade.
+.sp
+
+\fIipaddr = < hostname | ip >\fR
+.sp
+IP address or hostname of the switch.
+.sp
+
+\fI community = < param >\fR
+.sp
+SNMP community.
+.sp
+
+\fI option = < param >\fR
+.sp
+The action required.  reboot (default), on or off.
+.sp
+
+\fI port = < param >\fR
+.sp
+The Blade port number to disable.
+.sp
+
+
+.in -7
+\fBSEE ALSO\fP
+.in +7
+fence(8), fence_node(8)

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