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fence_ldom.py
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#!/usr/bin/python -tt
##
## The Following Agent Has Been Tested On - LDOM 1.0.3
## The interface is backward compatible so it will work
## with 1.0, 1.0.1 and .2 too.
##
#####
import sys, re, pexpect, exceptions
import atexit
sys.path.append("@FENCEAGENTSLIBDIR@")
from fencing import *
from fencing import fail_usage
#BEGIN_VERSION_GENERATION
RELEASE_VERSION="Logical Domains (LDoms) fence Agent"
REDHAT_COPYRIGHT=""
BUILD_DATE=""
#END_VERSION_GENERATION
COMMAND_PROMPT_REG = r"\[PEXPECT\]$"
COMMAND_PROMPT_NEW = "[PEXPECT]"
# Start comunicating after login. Prepare good environment.
def start_communication(conn, options):
conn.send_eol("PS1='" + COMMAND_PROMPT_NEW + "'")
res = conn.expect([pexpect.TIMEOUT, COMMAND_PROMPT_REG], int(options["--shell-timeout"]))
if res == 0:
#CSH stuff
conn.send_eol("set prompt='" + COMMAND_PROMPT_NEW + "'")
conn.log_expect(options, COMMAND_PROMPT_REG, int(options["--shell-timeout"]))
def get_power_status(conn, options):
start_communication(conn, options)
conn.send_eol("ldm ls")
conn.log_expect(options, COMMAND_PROMPT_REG, int(options["--shell-timeout"]))
result = {}
#This is status of mini finite automata. 0 = we didn't found NAME and STATE, 1 = we did
fa_status = 0
for line in conn.before.splitlines():
domain = re.search(r"^(\S+)\s+(\S+)\s+.*$", line)
if domain != None:
if fa_status == 0 and domain.group(1) == "NAME" and domain.group(2) == "STATE":
fa_status = 1
elif fa_status == 1:
result[domain.group(1)] = ("", (domain.group(2).lower() == "bound" and "off" or "on"))
if not options["--action"] in ['monitor', 'list']:
if not options["--plug"] in result:
fail_usage("Failed: You have to enter existing logical domain!")
else:
return result[options["--plug"]][1]
else:
return result
def set_power_status(conn, options):
start_communication(conn, options)
cmd_line = "ldm "+ (options["--action"] == "on" and "start" or "stop -f") + " \"" + options["--plug"] + "\""
conn.send_eol(cmd_line)
conn.log_expect(options, COMMAND_PROMPT_REG, int(options["--power-timeout"]))
def main():
device_opt = ["ipaddr", "login", "passwd", "cmd_prompt", "secure", "port"]
atexit.register(atexit_handler)
all_opt["secure"]["default"] = "1"
all_opt["cmd_prompt"]["default"] = [r"\ $"]
options = check_input(device_opt, process_input(device_opt))
docs = {}
docs["shortdesc"] = "Fence agent for Sun LDOM"
docs["longdesc"] = "fence_ldom is an I/O Fencing agent \
which can be used with LDoms virtual machines. This agent works \
so, that run ldm command on host machine. So ldm must be directly \
runnable.\
\n.P\n\
Very useful parameter is -c (or cmd_prompt in stdin mode). This \
must be set to something, what is displayed after successful login \
to host machine. Default string is space on end of string (default \
for root in bash). But (for example) csh use ], so in that case you \
must use parameter -c with argument ]. Very similar situation is, \
if you use bash and login to host machine with other user than \
root. Than prompt is $, so again, you must use parameter -c."
docs["vendorurl"] = "http://www.sun.com"
show_docs(options, docs)
##
## Operate the fencing device
####
conn = fence_login(options)
result = fence_action(conn, options, set_power_status, get_power_status, get_power_status)
fence_logout(conn, "logout")
sys.exit(result)
if __name__ == "__main__":
main()

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