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#!/usr/bin/python
# vim: set filetype=python
#######################################################################
#
# ibmrsa-telnet - External stonith plugin for HAv2 (http://linux-ha.org/wiki)
# Connects to IBM RSA Board via telnet and switches power
# of server appropriately.
#
# Author: Andreas Mock (andreas.mock@web.de)
#
# History:
# 2007-10-19 Fixed bad commandline handling in case of stonithing
# 2007-10-11 First release.
#
# Comment: Please send bug fixes and enhancements.
# I hope the functionality of communicating via telnet is encapsulated
# enough so that someone can use it for similar purposes.
#
# Description: IBM offers Remote Supervisor Adapters II for several
# servers. These RSA boards can be accessed in different ways.
# One of that is via telnet. Once logged in you can use 'help' to
# show all available commands. With 'power' you can reset, power on and
# off the controlled server. This command is used in combination
# with python's standard library 'telnetlib' to do it automatically.
#
# cib-snippet: Please see README.ibmrsa-telnet for examples.
#
# Copyright (c) 2007 Andreas Mock (andreas.mock@web.de)
# All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 or later of the GNU General Public
# License as published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like. Any license provided herein, whether implied or
# otherwise, applies only to this software file. Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#######################################################################
import sys
import os
import time
import telnetlib
import subprocess
class TimeoutException(Exception):
def __init__(self, value=None):
Exception.__init__(self)
self.value = value
def __str__(self):
return repr(self.value)
class RSABoard(telnetlib.Telnet):
def __init__(self, *args, **kwargs):
telnetlib.Telnet.__init__(self, *args, **kwargs)
self._timeout = 10
self._loggedin = 0
self._history = []
self._appl = os.path.basename(sys.argv[0])
def _get_timestamp(self):
ct = time.time()
msecs = (ct - long(ct)) * 1000
return "%s,%03d" % (time.strftime("%Y-%m-%d %H:%M:%S",
time.localtime(ct)), msecs)
def write(self, buffer, nolog = False):
self._history.append(self._get_timestamp() + ': WRITE: ' +
(nolog and '******' or repr(buffer)))
telnetlib.Telnet.write(self, buffer)
def expect(self, what, timeout=20):
line = telnetlib.Telnet.expect(self, what, timeout)
self._history.append(self._get_timestamp() + ': READ : ' + repr(line))
if not line:
raise TimeoutException("Timeout while waiting for '%s'." % (what, ))
return line
def login(self, user, passwd):
time.sleep(1)
line = self.expect(['\nlogin : ', '\nusername: '], self._timeout)
self.write(user)
self.write('\r')
line = self.expect(['\nPassword: ', '\npassword: '], self._timeout)
self.write(passwd, nolog = True)
self.write('\r')
line = self.expect(['\nsystem>', '> '], self._timeout)
def reset(self):
self.write('power cycle\r')
line = self.expect(['\nok'], self._timeout)
line = self.expect(['\nsystem>', '> '], self._timeout)
def on(self):
self.write('power on\r')
line = self.expect(['\nok'], self._timeout)
line = self.expect(['\nsystem>', '> '], self._timeout)
def off(self):
self.write('power off\r')
line = self.expect(['\nok'], self._timeout)
line = self.expect(['\nsystem>', '> '], self._timeout)
def exit(self):
self.write('exit\r')
def get_history(self):
return "\n".join(self._history)
class RSAStonithPlugin:
def __init__(self):
# define the external stonith plugin api
self._required_cmds = \
'reset gethosts status getconfignames getinfo-devid ' \
'getinfo-devname getinfo-devdescr getinfo-devurl ' \
'getinfo-xml'
self._optional_cmds = 'on off'
self._required_cmds_list = self._required_cmds.split()
self._optional_cmds_list = self._optional_cmds.split()
# who am i
self._appl = os.path.basename(sys.argv[0])
# telnet connection object
self._connection = None
# the list of configuration names
self._confignames = ['nodename', 'ip_address', 'username', 'password']
# catch the parameters provided by environment
self._parameters = {}
for name in self._confignames:
try:
self._parameters[name] = os.environ.get(name, '').split()[0]
except IndexError:
self._parameters[name] = ''
def _get_timestamp(self):
ct = time.time()
msecs = (ct - long(ct)) * 1000
return "%s,%03d" % (time.strftime("%Y-%m-%d %H:%M:%S",
time.localtime(ct)), msecs)
def _echo_debug(self, *args):
self.echo_log('debug', *args)
def echo(self, *args):
what = ''.join([str(x) for x in args])
sys.stdout.write(what)
sys.stdout.write('\n')
sys.stdout.flush()
self._echo_debug("STDOUT:", what)
def echo_log(self, level, *args):
subprocess.call(('ha_log.sh', level) + args)
def _get_connection(self):
if not self._connection:
c = RSABoard()
self._echo_debug("Connect to '%s'" %
(self._parameters['ip_address'],))
c.open(self._parameters['ip_address'])
self._echo_debug("Connection established")
c.login(self._parameters['username'],
self._parameters['password'])
self._connection = c
def _end_connection(self):
if self._connection:
self._connection.exit()
self._connection.close()
def reset(self):
self._get_connection()
self._connection.reset()
self._end_connection()
self._echo_debug(self._connection.get_history())
self.echo_log("info", "Reset of node '%s' done" %
(self._parameters['nodename'],))
return(0)
def on(self):
self._get_connection()
self._connection.on()
self._end_connection()
self._echo_debug(self._connection.get_history())
self.echo_log("info", "Switched node '%s' ON" %
(self._parameters['nodename'],))
return(0)
def off(self):
self._get_connection()
self._connection.off()
self._end_connection()
self._echo_debug(self._connection.get_history())
self.echo_log("info", "Switched node '%s' OFF" %
(self._parameters['nodename'],))
return(0)
def gethosts(self):
self.echo(self._parameters['nodename'])
return(0)
def status(self):
self._get_connection()
self._end_connection()
self._echo_debug(self._connection.get_history())
return(0)
def getconfignames(self):
for name in ['nodename', 'ip_address', 'username', 'password']:
self.echo(name)
return(0)
def getinfo_devid(self):
self.echo("External Stonith Plugin for IBM RSA Boards")
return(0)
def getinfo_devname(self):
self.echo("External Stonith Plugin for IBM RSA Boards connecting "
"via Telnet")
return(0)
def getinfo_devdescr(self):
self.echo("External stonith plugin for HAv2 which connects to "
"a RSA board on IBM servers via telnet. Commands to "
"turn on/off power and to reset server are sent "
"appropriately. "
"(c) 2007 by Andreas Mock (andreas.mock@web.de)")
return(0)
def getinfo_devurl(self):
self.echo("http://www.ibm.com/Search/?q=remote+supervisor+adapter")
def getinfo_xml(self):
info = """<parameters>
<parameter name="nodename" unique="1" required="1">
<content type="string" />
<shortdesc lang="en">nodename to shoot</shortdesc>
<longdesc lang="en">
Name of the node which has to be stonithed in case.
</longdesc>
</parameter>
<parameter name="ip_address" unique="1" required="1">
<content type="string" />
<shortdesc lang="en">hostname or ip address of RSA</shortdesc>
<longdesc lang="en">
Hostname or ip address of RSA board used to reset node.
</longdesc>
</parameter>
<parameter name="username" unique="1" required="1">
<content type="string" />
<shortdesc lang="en">username to login on RSA board</shortdesc>
<longdesc lang="en">
Username to login on RSA board.
</longdesc>
</parameter>
<parameter name="password" unique="1" required="1">
<content type="string" />
<shortdesc lang="en">password to login on RSA board</shortdesc>
<longdesc lang="en">
Password to login on RSA board.
</longdesc>
</parameter>
</parameters>
"""
self.echo(info)
return(0)
def not_implemented(self, cmd):
self.echo_log("err", "Command '%s' not implemented." % (cmd,))
return(1)
def usage(self):
usage = "Call me with one of the allowed commands: %s, %s" % (
', '.join(self._required_cmds_list),
', '.join(self._optional_cmds_list))
return usage
def process(self, argv):
self._echo_debug("========== Start =============")
if len(argv) < 1:
self.echo_log("err", 'At least one commandline argument required.')
return(1)
cmd = argv[0]
self._echo_debug("cmd:", cmd)
if cmd not in self._required_cmds_list and \
cmd not in self._optional_cmds_list:
self.echo_log("err", "Command '%s' not supported." % (cmd,))
return(1)
try:
cmd = cmd.lower().replace('-', '_')
func = getattr(self, cmd, self.not_implemented)
rc = func()
return(rc)
except Exception, args:
self.echo_log("err", 'Exception raised:', str(args))
if self._connection:
self.echo_log("err", self._connection.get_history())
self._connection.close()
return(1)
if __name__ == '__main__':
stonith = RSAStonithPlugin()
rc = stonith.process(sys.argv[1:])
sys.exit(rc)
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