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#!/usr/bin/perl -w
#
# EMULAB-COPYRIGHT
# Copyright (c) 2004 University of Utah and the Flux Group.
# All rights reserved.
#
use English;
use Getopt::Std;
use POSIX qw(setsid);

#
# This script is run directly from boot on the control node (ops, users).
# Since boss needs to be up before this stuff will work, we go into the
# background so that the rest of boot is not held up. 
#
sub usage()
{
    print "Usage: " . scriptname() . "[-b] boot|shutdown|reconfig|reset\n";
    exit(1);
}
my $optlist    = "b";
my $background = 0;
my $action     = "boot";

# Turn off line buffering on output
$| = 1;

# Drag in path stuff so we can find emulab stuff.
BEGIN { require "/etc/emulab/paths.pm"; import emulabpaths; }

# Only root.
if ($UID || $EUID) {
    die("*** $0:\n".
	"    Must be root to run this script!\n");
}

# Script specific goo.
my $RCDIR   = "$BINDIR/rc";
my $LOGFILE = "/var/log/testbedboot.debug";

#
# Load the OS independent support library. It will load the OS dependent
# library and initialize itself. 
# 
use libsetup;
use libtmcc;
use librc;

# Protos.
sub doboot();
sub doshutdown();
sub doreconfig();
sub docleanup();

# Parse command line.
if (! getopts($optlist, \%options)) {
    usage();
}
if (defined($options{'b'})) {
    $background = 1;
}
# Allow default above.
if (@ARGV) {
    $action = $ARGV[0];
}

print "testbed "; 
# Execute in background and return immediately.
if ($background && TBBackGround($LOGFILE)) {
    sleep(1);
    exit(0);
}
# Fully disconnect from bootup. 
setsid();

# Execute the action.
SWITCH: for ($action) {
    /^boot$/i && do {
	doboot();
	last SWITCH;
    };
    /^shutdown$/i && do {
	doshutdown();
	last SWITCH;
    };
    /^reconfig$/i && do {
	doreconfig();
	last SWITCH;
    };
    /^reset$/i && do {
	docleanup();
	last SWITCH;
    };
    fatal("Invalid action: $action\n");
}
exit(0);

#
# Boot Action.
#
sub doboot()
{
    #
    # Sort of a hodgepodge of stuff!
    #

    #
    # Check for an os dependent initialization script.
    #
    my $os_script = "rc." . lc($OSNAME);
    
    if (-x "$RCDIR/$os_script") {
	system("$RCDIR/$os_script");
	if ($?) {
	    fatal("Error running $RCDIR/$os_script");
	}
    }

    #
    # This might be a good thing to run on the control node?
    # 
    if (-x "$BINDIR/tbshutdown") {
        print("Starting up shutdown notification daemon\n");
        system("$BINDIR/tbshutdown");
	if ($?) {
	    fatal("Error running $BINDIR/tbshutdown");
	}
    }

    #
    # This might be a good thing to run on the control node?
    # 
    if (-x "$RCDIR/rc.ipod") {
	print("Setting up Ping of Death\n");
	system("$RCDIR/rc.ipod");
	# This is allowed to fail; ipod might not be supported.
    }

    #
    # Tell boss we rebooted. We do this in a loop cause we have to wait
    # for boss to come back alive in case it was also down.
    #
    print("Informing Emulab Control that we have rebooted\n");
    while (1) {
	if (tmcc(TMCCCMD_STATE, "TBSETUP") == 0) {
	    last;
	}
	print "Error sending TBSETUP to Emulab Control. Retrying ...\n";
	sleep(5);
    }

    # Not much to do yet inbetween ... just delay a bit for settling down.
    sleep(5);

    # Now send ISUP
    print("Informing Emulab Control that we are up and running\n");
    while (1) {
	if (tmcc(TMCCCMD_STATE, "ISUP") == 0) {
	    last;
	}
	print "Error sending ISUP to Emulab Control. Retrying ...\n";
	sleep(5);
    }
}

#
# Shutdown Action.
#
sub doshutdown()
{
    print("Informing Emulab Control that we are are rebooting\n");
    if (tmcc(TMCCCMD_STATE, "SHUTDOWN") < 0) {
	fatal("Error sending SHUTDOWN to Emulab Control!");
    }
}

#
# Node Reconfig Action (without rebooting).
#
sub doreconfig()
{
}

#
# Node cleanup action (node is reset to completely clean state).
#
sub docleanup()
{
}