Bug 175538 - DRAC 4/I support needed
DRAC 4/I support needed
Product: Red Hat Cluster Suite
Classification: Red Hat
Component: fence (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Jim Parsons
Cluster QE
Depends On: 211836
Blocks: Cluster4u5relnotes
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Reported: 2005-12-12 10:15 EST by Jim Parsons
Modified: 2009-04-16 16:11 EDT (History)
4 users (show)

See Also:
Fixed In Version: RHBA-2007-0138
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2007-05-10 17:23:47 EDT
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Regression: ---
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Verified Versions:
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Patch to fence_drac from RHEL4U2 branch (1.28 KB, patch)
2006-01-18 20:30 EST, Andrew J Forgue
no flags Details | Diff

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0138 normal SHIPPED_LIVE fence bug fix update 2007-05-10 17:23:14 EDT

  None (edit)
Description Jim Parsons 2005-12-12 10:15:46 EST
Description of problem:
A customer rep asks:

Are there any plans to expand the list of DRACs supported by the fence_drac
agent, beyond DRAC III/XT &
DRAC/MC? The PowerEdge 1850(and other newer servers) uses the DRAC 4/I, which is
unsupported and doesn't work with the current fencing agent. Firstly, the
getmodinfo is an unsupported command on the 4/I. But, and upgrade in firmware(to
v 1.35) replaced the support for the command. So that fixes that problem. But,
even with the command being returned, the fencing agent doesn't work. It
establishes the telnet session and gets the "unable to determine power state"
error and quits.
Comment 1 Andrew J Forgue 2006-01-18 20:30:16 EST
Created attachment 123406 [details]
Patch to fence_drac from RHEL4U2 branch
Comment 2 Jim Parsons 2006-02-17 14:24:59 EST
Thanks for the patch. This required one minor amendment, and then worked with
4/I firmware 1.20, but now the field reports that it does not work with the
latest firmware release (1.30).

One other note: This agent will NOT work with the DRAC 4/P, which I think is
unfenceable, as it does not have a way to determine power status.
Comment 5 Brian 2006-10-02 16:11:19 EDT
I'm running Dell PowerEdge 1955 blade servers in a chassis with DRAC/MC 1.3
firmware, and I'm seeing a similar problem. The fence_drac is able to power
off/on the blade, but its not returning the correct status after the power is
switched off or on.

Example command issued:
# fence_drac -a -l username -p password -D debug.txt -m Server-10 -v
-o off
detected drac version 'DRAC/MC'
failed: telnet returned: pattern match timed-out

Server is shut off harshly (ie. about 3 services are shutdown in init 6, then
power is cut to the machine).

Its great that the server is getting shut down, but fence_node gets thrown into
a death loop rebooting the server using fence_drac as the fence program.
Comment 6 Brian 2006-10-03 17:24:31 EDT
I fixed the 1.3 problem. It was due to the telnet interface being significantly
slower in 1.3 than 1.2, and the 5 second timeout was too short for $telnet_timeout.

/sbin/fence_drac, line 33:
my $telnet_timeout = 5;      # Seconds to wait for matching telent response

my $telnet_timeout = 10;      # Seconds to wait for matching telent response
Comment 7 Jim Parsons 2006-10-20 12:23:32 EDT
4/I support is added to the agent and the telnet timeout has been increased. In
addition, DRAC 4/P support has been added, and has been tested for 4/p firmware
version 1.40
Comment 10 Red Hat Bugzilla 2007-05-10 17:23:47 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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