Re: [xcat-user] osimage profile attribute

[Mark Gurevich]

In these two examples: "xdsh compute command" and "rpower compute off", the
target nodes for the command will be from nodegroup "compute", not
necessarily just the nodes that have "profile=compute" in their
definitions.

Mark Gurevich
Poughkeepsie Development Lab
HPC Software Development - xCAT

"If we knew what it was we were doing, it would not be called research,
would it?"
--Albert Einstein





From:   "Vinícius Ferrão via xCAT-user"

To: xCAT Users Mailing list 
Cc: "Vinícius Ferrão" 
Date:   01/16/2020 02:28 PM
Subject:[EXTERNAL] Re: [xcat-user] osimage profile attribute



You can use it as a keyword for other commands, for instance:

xdsh compute command
rpower compute off

  On 16 Jan 2020, at 14:37, Bruce Carpenter  wrote:

  What does the “profile” attribute in osimage (osimage.profile)
  affect?  The description just states: “The node usage category. For
  example compute, service.”

  Does any of xcat use that attribute for anything, or is it just an
  extra “description”?

  --
  Bruce Carpenter
  System Administrator Spec. EITS - Research Computing
  #108 Computing Services
  101 Cedar Street
  Athens, GA 30602-0001
  bcarpen...@uga.edu

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Re: [xcat-user] osimage profile attribute

[Vinícius Ferrão via xCAT-user]

You can use it as a keyword for other commands, for instance:

xdsh compute command
rpower compute off

On 16 Jan 2020, at 14:37, Bruce Carpenter 
mailto:bcarpen...@uga.edu>> wrote:

What does the “profile” attribute in osimage (osimage.profile) affect?  The 
description just states: “The node usage category. For example compute, 
service.”

Does any of xcat use that attribute for anything, or is it just an extra 
“description”?

--
Bruce Carpenter
System Administrator Spec. EITS - Research Computing
#108 Computing Services
101 Cedar Street
Athens, GA 30602-0001
bcarpen...@uga.edu

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Re: [xcat-user] osimage profile attribute

[Casandra H Qiu]

if profile is set up as service,  this osimage is  for hierarchy support
and node is provisioned  as service node.
xCAT code bases  are using this attribute heavily .
please do not change this attribute to something else.



Thanks,
Casandra
...
Casandra Hong Qiu
Phone: (845) 433-9291, t/l 293-9291
Office: Building 8, 3-B-04
cxh...@us.ibm.com





From:   Bruce Carpenter 
To: xCAT Users Mailing list 
Date:   01/16/2020 12:52 PM
Subject:[EXTERNAL] [xcat-user] osimage profile attribute



What does the “profile” attribute in osimage (osimage.profile) affect?  The
description just states: “The node usage category. For example compute,
service.”

Does any of xcat use that attribute for anything, or is it just an extra
“description”?

--
Bruce Carpenter
System Administrator Spec. EITS - Research Computing
#108 Computing Services
101 Cedar Street
Athens, GA 30602-0001
bcarpen...@uga.edu
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[xcat-user] osimage profile attribute

[Bruce Carpenter]

What does the "profile" attribute in osimage (osimage.profile) affect?  The 
description just states: "The node usage category. For example compute, 
service."

Does any of xcat use that attribute for anything, or is it just an extra 
"description"?

--
Bruce Carpenter
System Administrator Spec. EITS - Research Computing
#108 Computing Services
101 Cedar Street
Athens, GA 30602-0001
bcarpen...@uga.edu

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Re: [xcat-user] no openssh in compute node

[Casandra H Qiu]

the compute.centos7.pkglist should contains openssh-server package.  what's
your osimage defintion?  make sure pktdir and pkglist are correct.


Thanks,
Casandra

...
Casandra Hong Qiu
Phone: (845) 433-9291, t/l 293-9291
Office: Building 8, 3-B-04
cxh...@us.ibm.com





From:   S S R R Perumal 
To: xcat-user@lists.sourceforge.net
Date:   01/16/2020 12:51 AM
Subject:[EXTERNAL] [xcat-user] no openssh in compute node



Hello,
         After net boot (xcat 2.15, centos 7.7 diskfull) the compute node
fails to install openssh, Changing the pkg.list file folder, which does
contain open-ssh, is of no help. And the status still indicates to
installing which is makes it clear that head node not able to communicate
to get the status.

Access to the head from the compute node is possible, and in the compute
node "rpm -qa | grep openssh" yields nothing. Also I find that the sestatus
is also enabled!

Am I missing something here? Any help greatly appreciated.

Thank you for your time.

Sathya



--
S S R R Perumal PhD
TUE-CMS High Performance Computing Data Center
Solid State and Structural Chemistry Unit,
IISc, Bangalore.
sathyasrrperu...@gmail.com


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Re: [xcat-user] How to use xCAT without DHCP?

[Josef Dvoracek]

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
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[xcat-user] Automatische Antwort: How to use xCAT without DHCP?

[Heckes Frank (CI/OSB4) via xCAT-user]

Hello,

many thanks for your e-mail.  I'm out of office on January 10th and January 
31st 2020.

Best regards
-Frank Heckes
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[xcat-user] How to use xCAT without DHCP?

[Kondra007 via xCAT-user]

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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