linux:netio-fencing [Starlab knowledge base]

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====== Install ======
<code bash>
apt-get install make dh-autoreconf python-suds python-requests python-pycurl git
cd /usr/src
git clone https://github.com/ClusterLabs/fence-agents.git
cd fence-agents/
./autogen.sh 
./configure
make
make install
</code>

  * note: in case you are getting this error:<code bash>fatal: unable to access 'https://github.com/ClusterLabs/fence-agents.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none</code> use following command before issuing the git clone:<code>export GIT_SSL_NO_VERIFY=1</code>
====== NETIO 230A agent ======
<code python>
#!/usr/bin/python -tt

import sys, re, pexpect
import atexit
sys.path.append("/usr/share/fence")
from fencing import *
import telnetlib
from fencing import fspawn, fail, EC_LOGIN_DENIED, run_delay, logging, atexit_handler
from time import sleep

#BEGIN_VERSION_GENERATION
RELEASE_VERSION="4.0.21.26-f32ef"
BUILD_DATE="(built Thu Nov 26 11:16:18 CET 2015)"
REDHAT_COPYRIGHT="Copyright (C) Red Hat, Inc. 2004-2010 All rights reserved."
#END_VERSION_GENERATION

def get_power_status(conn, options):
        conn.read_very_eager()
        logging.debug("port %s" % options["--plug"])
        conn.write("port %s\r\n" % options["--plug"])
        re_status = re.compile("250 [01imt]")
        ret = conn.expect([re_status,], int(options["--shell-timeout"]))
        logging.debug(ret[2])
        status = {
                "0" : "off",
                "1" : "on",
                "i" : "reboot",
                "m" : "manual",
                "t" : "timer",

        }[ret[2].split()[1]]
        logging.info("Power status: %s" % status)
        return status

def set_power_status(conn, options):
        action = {
                "on" : "1",
                "off" : "0",
                "reboot" : "i"
        }[options["--action"]]

        logging.debug("port %s %s" % (options["--plug"], action))
        conn.write("port %s %s\r\n" % (options["--plug"], action))
        sleep(0.500)
        ret = conn.read_until("250 OK", int(options["--shell-timeout"]))
        logging.debug(ret)


def get_outlet_list(conn, options):
        result = {}

        try:
                # the NETIO-230B has 4 ports, counting start at 1
                for plug in ["1", "2", "3", "4"]:
                        conn.write("port setup %s\r\n" % plug)
                        ret = conn.read_until("250 .+", int(options["--shell-timeout"]))
                        # the name is enclosed in "", drop those with [1:-1]
                        name = ret.split()[1][1:-1]
                        result[plug] = (name, "unknown")
        except Exception, exn:
                print str(exn)

        return result

def main():
        device_opt = ["ipaddr", "login", "passwd", "port", "telnet"]

        atexit.register(atexit_handler)

        all_opt["ipport"]["default"] = "1234"

        opt = process_input(device_opt)
        opt["eol"] = "\n\r"
        options = check_input(device_opt, opt)

        docs = {}
        docs["shortdesc"] = "I/O Fencing agent for Koukaam NETIO-230B"
        docs["longdesc"] = "fence_netio is an I/O Fencing agent which can be \
used with the Koukaam NETIO-230B Power Distribution Unit. It logs into \
device via telnet and reboots a specified outlet. Lengthy telnet connections \
should be avoided while a GFS cluster is running because the connection will \
block any necessary fencing actions."
        docs["vendorurl"] = "http://www.koukaam.se/"
        show_docs(options, docs)

        ##
        ## Operate the fencing device
        ## We can not use fence_login(), username and passwd are sent on one line
        ####
        run_delay(options)
        try:
                conn = telnetlib.Telnet(options["--ip"], options["--ipport"])
                conn.read_until("100 HELLO", int(options["--shell-timeout"]))
                conn.write("login %s %s\r\n" % (options["--username"], options["--password"]))
                conn.read_until("250 OK", int(options["--shell-timeout"]))

        except pexpect.EOF:
                fail(EC_LOGIN_DENIED)
        except pexpect.TIMEOUT:
                fail(EC_LOGIN_DENIED)

        result = fence_action(conn, options, set_power_status, get_power_status, get_outlet_list)
#       fence_logout(conn, "quit\n")
        conn.write("quit\r\n")
        sys.exit(result)

if __name__ == "__main__":
        main()

</code>
linux/netio-fencing.txt · Last modified: 2015/12/11 12:26 by vondra