Cause:
=======
Strange behavior of some HW IPMI implementations (for example IBM x3550, brand new supermicro motherboard).
Consequence:
============
Old behavior:
perhaps (chassis power status)
chassis power off
chassis power status (wait for this to return "off")
chassis power on
chassis power status (wait for this to return "on")
and the BMC controller for some difficult to understand reason shuts itself
down after the "chassis power off", so it will be not able to power on machine.
Fix:
====
Add support for power cycle command, which doesn't shut BMC controller.
Result:
=======
Old behavior is default, so nothing change without reconfiguration. But now, there is new method option, which can have value cycle, what will cause a new behavior (use ipmi power cycle command).
Example of usage:...
<fencedevices>
<fencedevice agent="fence_ipmilan_new" ipaddr="1.2.3.4"
login="root" name="ipmifd1" passwd="password" method="cycle" />
...
Created attachment 402083[details]
Backported patch
Patch adding power cycle:
Default behaviour (off/get status/on) doesn't work on
some IPMI implementations, because chasiss power off will
turn off IPMI management card. Next power on cannot be
done automatically. But it looks, like chassis power cycle
is supported and do what we need -> reset machine.
Patch add support for -M (method) option, which can have
values:
- onoff - default old behaviour
- cycle - use new power cycle
Technical note added. If any revisions are required, please edit the "Technical Notes" field
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New Contents:
Cause:
=======
Strange behavior of some HW IPMI implementations (for example IBM x3550, brand new supermicro motherboard).
Consequence:
============
Old behavior:
perhaps (chassis power status)
chassis power off
chassis power status (wait for this to return "off")
chassis power on
chassis power status (wait for this to return "on")
and the BMC controller for some difficult to understand reason shuts itself
down after the "chassis power off", so it will be not able to power on machine.
Fix:
====
Add support for power cycle command, which doesn't shut BMC controller.
Result:
=======
Old behavior is default, so nothing change without reconfiguration. But now, there is new method option, which can have value cycle, what will cause a new behavior (use ipmi power cycle command).
Example of usage:...
<fencedevices>
<fencedevice agent="fence_ipmilan_new" ipaddr="1.2.3.4"
login="root" name="ipmifd1" passwd="password" method="cycle" />
...
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 therefore 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.
http://rhn.redhat.com/errata/RHSA-2011-0266.html
Created attachment 402083 [details] Backported patch Patch adding power cycle: Default behaviour (off/get status/on) doesn't work on some IPMI implementations, because chasiss power off will turn off IPMI management card. Next power on cannot be done automatically. But it looks, like chassis power cycle is supported and do what we need -> reset machine. Patch add support for -M (method) option, which can have values: - onoff - default old behaviour - cycle - use new power cycle