Jose Jerez wrote:
On 8/24/07, Dave Blaschke <[EMAIL PROTECTED]> wrote:
Jose Jerez wrote:
Hello,
I want to configure stonith in my cluster and since they are LPARs in
a p Series 570 y can use the ibmhmc stonith agent; my questions are:
-What user initiates the connection from the cluster to the HMC? I
know there will be a ssh connection and the end user is hscroot, but
the initiating user is <fill in here>? I need this info to configure
de public key ssh authentication
The user is root, but you can use the optional password parameter and
then ssh keys aren't necessary as the plugin will login as hscroot using
that password (no keys necessary since the password is provided with
each ssh command)
-Once connected the the HMC does the stonith agent rely in DNS
resolution to contact the nodes? In my test cluster they have entries
in /etc/hosts but the HMC itself won't be able to resolve the names of
the nodes.
The LPAR names need to match the corresponding "uname -n" results for
each node in the cluster, which should also match the node names in ha.cf
-And finally , whats the exact command that is executed in the HMC
secure shell to stop/reboot the nodes?
Add the -d option to the stonith command line and the plugin will dump
most of the commands it uses, such as lssyscfg to determine the LPAR's
current state (Running, Starting, etc.) and chsysstate to power on/off
and, as in the following example, reset the LPAR:
chsysstate -m managedsystemname -r lpar -o shutdown -n lparname --immed
--restart
Kind regards.
Thanks for the clarifications Dave,
now I got it working and stonithing the LPARs ;-)
Finally I chose the public key authentication, don't feel comfortable
with the hscroot password in the heartbeat configuration.
One final question: "man chsysstate" or the redbook sg247038 don't
show anything about the options --immed and --restart, any other
public source of documentation for these?
Hmmm, what version of HMC code are you using? On mine (V5R2.1) "man
chsysstate" includes the following:
CHSYSSTATE(1) User Manuals CHSYSSTATE(1)
NAME
chsysstate - change partition state or system state
SYNOPSIS
To power on a managed system:
chsysstate -m managed-system -r sys
-o {on | onstandby | onsysprof}
[-f system-profile-name]
[-k keylock-position]
To power off a managed system:
chsysstate -m managed-system -r sys
-o off [--immed]
To restart a managed system:
chsysstate -m managed-system -r sys
-o off --immed --restart
Thanks again.
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