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fence_ifmib.py
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fence_ifmib.py
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#!/usr/bin/python
# The Following agent has been tested on:
# - Cisco MDS UROS 9134 FC (1 Slot) Chassis ("1/2/4 10 Gbps FC/Supervisor-2") Motorola, e500v2
# with BIOS 1.0.16, kickstart 4.1(1c), system 4.1(1c)
# - Cisco MDS 9124 (1 Slot) Chassis ("1/2/4 Gbps FC/Supervisor-2") Motorola, e500
# with BIOS 1.0.16, kickstart 4.1(1c), system 4.1(1c)
# - Partially with APC PDU (Network Management Card AOS v2.7.0, Rack PDU APP v2.7.3)
# Only lance if is visible
import sys
sys.path.append("@FENCEAGENTSLIBDIR@")
from fencing import *
from fencing_snmp import *
#BEGIN_VERSION_GENERATION
RELEASE_VERSION="IF:MIB SNMP fence agent"
REDHAT_COPYRIGHT=""
BUILD_DATE=""
#END_VERSION_GENERATION
### CONSTANTS ###
# IF-MIB trees for alias, status and port
ALIASES_OID = ".1.3.6.1.2.1.31.1.1.1.18"
PORTS_OID = ".1.3.6.1.2.1.2.2.1.2"
STATUSES_OID = ".1.3.6.1.2.1.2.2.1.7"
# Status constants returned as value from SNMP
STATUS_UP = 1
STATUS_DOWN = 2
STATUS_TESTING = 3
### GLOBAL VARIABLES ###
# Port number converted from port name or index
port_num = None
### FUNCTIONS ###
# Convert port index or name to port index
def port2index(conn, port):
res = None
if (port.isdigit()):
res = int(port)
else:
ports = conn.walk(PORTS_OID, 30)
for x in ports:
if (x[1].strip('"')==port):
res = int(x[0].split('.')[-1])
break
if (res==None):
fail_usage("Can't find port with name %s!"%(port))
return res
def get_power_status(conn, options):
global port_num
if (port_num==None):
port_num = port2index(conn, options["--plug"])
(oid, status) = conn.get("%s.%d"%(STATUSES_OID, port_num))
return (status==str(STATUS_UP) and "on" or "off")
def set_power_status(conn, options):
global port_num
if (port_num==None):
port_num = port2index(conn, options["--plug"])
conn.set("%s.%d"%(STATUSES_OID, port_num), (options["--action"]=="on" and STATUS_UP or STATUS_DOWN))
# Convert array of format [[key1, value1], [key2, value2], ... [keyN, valueN]] to dict, where key is
# in format a.b.c.d...z and returned dict has key only z
def array_to_dict(ar):
return dict(map(lambda y:[y[0].split('.')[-1], y[1]], ar))
def get_outlets_status(conn, options):
result = {}
res_fc = conn.walk(PORTS_OID, 30)
res_aliases = array_to_dict(conn.walk(ALIASES_OID, 30))
for x in res_fc:
port_num = x[0].split('.')[-1]
port_name = x[1].strip('"')
port_alias = (res_aliases.has_key(port_num) and res_aliases[port_num].strip('"') or "")
port_status = ""
result[port_name] = (port_alias, port_status)
return result
# Main agent method
def main():
device_opt = [ "fabric_fencing", "ipaddr", "login", "passwd", "no_login", "no_password", \
"port", "snmp_version", "community" ]
atexit.register(atexit_handler)
snmp_define_defaults ()
all_opt["snmp_version"]["default"] = "2c"
options = check_input(device_opt, process_input(device_opt))
docs = { }
docs["shortdesc"] = "Fence agent for IF MIB"
docs["longdesc"] = "fence_ifmib is an I/O Fencing agent \
which can be used with any SNMP IF-MIB capable device. \
\n.P\n\
It was written with managed ethernet switches in mind, in order to \
fence iSCSI SAN connections. However, there are many devices that \
support the IF-MIB interface. The agent uses IF-MIB::ifAdminStatus \
to control the state of an interface."
docs["vendorurl"] = "http://www.ietf.org/wg/concluded/ifmib.html"
show_docs(options, docs)
# Operate the fencing device
result = fence_action(FencingSnmp(options), options, set_power_status, get_power_status, get_outlets_status)
sys.exit(result)
if __name__ == "__main__":
main()

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