Hello all,
I am trying to move my xCAT installation toward a hierarchical structure by
including Service Nodes but I am finding a dearth of information on how to
create a service node on the xCAT wiki and even the Sumavi xCAT guide. At
first I began following the instructions for a setting up a management node
(which involves a new xCAT install, an independent xCAT database, etc.) on
a VM intended to the the SN but then realized that that must be wrong.
I have noticed the xCAT 'servicenode' database table present on the
Management Node (listed with tabdump). I am wondering if I can simply
designate a new node (in my case a VM) to be the prospective SN, designate
which services (like dhcp, dns, etc.) to enable/disable in the
'servicenode' table, and then do a fresh 'rinstall' to that VM and have it
be automatically & fully configured as an SN from postinstall scripts
(which I presume are already present and will be automatically applied to
that node by some xCAT logic of parsing the 'servicenode' table and
associating any relevant postscripts to be run with the node).
If so will it create the /install and /tftpboot directories (including ISOs
made with copycds) on each SN identical to the contents of the MN? Is it
that simple or is there more involved than that?
In addition I want to be able to take down the Management Node in the
future for maintenance and be able to do just about everything that the MN
can do from the SNs (including dhcp leases, rpower commands, updatenode,
psh, etc) while the MN is down. Is that possible? Any clarifications would
be appreciated.
Thank you,
Josh Nielsen
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