Hi;
> Every cluster would have its own DHCP server, but there will be the
one central xCAT management node.
If you really want xCat and need to maintain single database, perhaps
you want to check concept of "service nodes" in xCat. Having service
node(s) for separated networks acting on behalf of master node(s) is
"supported" setup with xCat. But this concept still expects isc-dhcp
configured by xCat..
But.....
.......actually, from your description, i'm not sure if xCat is the
right tool for the job you need to be done. XCat, by default, relies on
embedded isc-dhcp server to provide the right iPXE configuration file (
located in "http://XCATHTTPSRV:80/tftpboot/xcat/xnba/nodes/YOURNODENAME"; ).
Why not create minimalistic (~10MB) bootable iso, chainloading directly
network-based installation (kickstart/preseed) from your local repo
mirror and configure then compute nodes by standard configuration
management tools like puppet/ansible? One could mount such a ISO using
HW vendor tools remotely (IPMI/iDrac/xxx) interface, most of the
communication can be done already in early phases over Infiniband...
> remote TFTP server
I'd avoid TFTP in new designs today. tftp/udp is not easy to
load-balance, it's by definition insecure and is sensitive to network
congestion. All important sw components are able to to talk https nowadays.
cheers
josef
On 16. 01. 20 9:34, Kondra007 via xCAT-user wrote:
Let's say we have multiple clusters around the world. Every cluster
would have its own DHCP server, but there will be the one central xCAT
management node.
I think it's possible to set MAC addresses for each node beforehand,
but I cannot do anything about DHCP on remote clusters.
Sorry if this question sounds to vague, but is it possible to manage
xCAT on remote clusters without DHCP? For example, provision nodes via
Internet using remote TFTP server and setting Service node IP manually.
Extra question: how can I control IP addresses set via iPXE?
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Josef Dvoracek
Institute of Physics | Czech Academy of Sciences
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