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Old 12-01-2008, 11:42 PM
Ryan Golhar
 
Default fence_apc & APC AP7941

I'm running RHEL 5 on a few machiens trying to implement clustering.
I'm at the part of getting fencing to work. I have fencing working with
my Brocade Fibre switches and now I'm setting up fencing with my APC
AP7941 PDUs.


I suspect there is a bug in the fence_apc code for my specific AOS & APP
version:


Network Management Card AOS: v3.5.6
Rack PDU APP: v3.5.5

fence_apc shows a version of 2.0.84 with a builddate of Tue Sep 9
16:28:58 EDT 2008


I've attached the log file generate by fence_apc below.

It seems like this specific version of the AOS & APP isn't supported.
What is happening is the script successfully logs into the PDU, then
issues the command "1" correctly. It then determines the FIRMWARE_REV
(as v3) then issues two commands at once "2" followed by "3". Using the
other firmware option, it only submits one command "3". Because of this
on its next step of submitting the outlet number, it thinks its at a
different position than it really is (because it hasn't parsed all the
output of executing both commands) at the same time. It then gets
caught in an endless loop of trying to execute a command.


I can see this in the function do_power_switch in fence_apc. I've
googled around and haven't seen any information related to this, so I
think I found a bug.


Is anyone else using fence_apc with this specific PDU? I have fencing
working with the fibre switches, but not sure if I need a backup fencing
device.


(I know I'm starting to ramble but its really clear in my head, I swear)

Ryan


###############################################
Telnetting to apc switch cicpdu2
Mon Dec 1 19:20:25 2008
socket open to cicpdu2

User Name : Sending login: apc
apc
Password : Sending password: apc
***


American Power Conversion Network Management Card AOS
v3.5.6
(c) Copyright 2007 All Rights Reserved Rack PDU APP
v3.5.5

-------------------------------------------------------------------------------
Name : cicpdu2 Date : 01/27/2001
Contact : Unknown Time : 11:08:18
Location : Unknown User : Administrator
Up Time : 22 Days 0 Hours 21 Minutes Stat : P+ N+ A+

Switched Rack PDU: Communication Established

------- Control Console
-------------------------------------------------------


1- Device Manager
2- Network
3- System
4- Logout

<ESC>- Main Menu, <ENTER>- Refresh, <CTRL-L>- Event Log
> 1

------- Device Manager
--------------------------------------------------------


1- Bank Management
2- Outlet Management
3- Power Supply Status

<ESC>- Back, <ENTER>- Refresh, <CTRL-L>- Event Log
> 2

------- Outlet Management
-----------------------------------------------------


1- Outlet Control/Configuration
2- Outlet Restriction

<ESC>- Back, <ENTER>- Refresh, <CTRL-L>- Event Log
> 1

------- Outlet Control/Configuration
------------------------------------------


1- Outlet 1 ON
2- Outlet 2 ON
3- Outlet 3 ON
4- Outlet 4 ON
5- Outlet 5 ON
6- Outlet 6 ON
7- Outlet 7 ON
8- Outlet 8 ON
9- Outlet 9 ON
10- Outlet 10 ON
11- Outlet 11 ON
12- Outlet 12 ON
13- Outlet 13 ON
14- Outlet 14 ON
15- Outlet 15 ON
16- Outlet 16 ON
17- Outlet 17 ON
18- Outlet 18 ON
19- Outlet 19 ON
20- Outlet 20 ON
21- Outlet 21 ON
22- Outlet 22 ON
23- Outlet 23 ON
24- Outlet 24 ON
25- Master Control/Configuration

<ESC>- Back, <ENTER>- Refresh, <CTRL-L>- Event Log
>

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