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11 Add_Extra_Parameters_for_confignics_Postscript
ligc edited this page 2015-07-30 04:22:49 -04:00
Table of Contents

Table of Contents

Design_Warning

Requirement

The requirement comes from defect 3567 (http://sourceforge.net/p/xcat/bugs/3567/), "Extend confignics & configib to support connected mode and large MTUs." The final result the user wants is to set the following for the network configuration file for a specific nic.

 CONNECTED_MODE=yes
 MTU=65520

Design

  1. As we know, the network configuration is setup by xCAT postscript confignics which in tern calls configeth and configib according to the nictypes defined in the nics table. We can add code in configeth and configib to support CONNECTED_MODE and MTU as environmental variables and put these settings in the nic configuration file.
  2. CONNECTED_MODE and MTU values may be different for different nics. So we should have the env variables on a per nic base.
  3. How to pass the environment variables all the way from mn to configeth and configib postscripts on the node?

Add a new nics table attributes called nicextraparams. It will define the additional environmental variables that will be passed to the nic configuration scripts. The format is:

nic1!env1=value1 env2=value2,nic2:env1=value1 env2=value2.

For example,

ib0!CONNECTED_MODE=yes MTU=65520,eth0!MTU=17000

The new attribute will be passed down to the postscripts as an environment variable.

Implementation

  1. Add a new attribute called nicextraparams in nics table.
  2. Incorporates it into the def commands
  3. Add the new attribute in the default postscript template so that it can be passed down to the nodes.
  4. Handle MTU environment variable in configeth postscript. Ethernet does not have connected mode setting. Handle MTU and CONNECTED_MODE environment variables in configib postscript.

Other Design Considerations

  • Required reviewers: Guang Cheng
  • Required approvers: Guang Cheng
  • Database schema changes: Yes. A new attribute will be added in nics table. The def command will be modified to accept this new attribute.
  • Affect on other components: N/A
  • External interface changes, documentation, and usability issues: The tabdump -d command will show the format of the new attribute.
  • Packaging, installation, dependencies: N/A
  • Portability and platforms (HW/SW) supported: N/A
  • Performance and scaling considerations: N/A
  • Migration and coexistence: N/A
  • Serviceability: N/A
  • Security: N/A
  • NLS and accessibility: N/A
  • Invention protection: N/A

News

History

  • Oct 22, 2010: xCAT 2.5 released.
  • Apr 30, 2010: xCAT 2.4 is released.
  • Oct 31, 2009: xCAT 2.3 released.
    xCAT's 10 year anniversary!
  • Apr 16, 2009: xCAT 2.2 released.
  • Oct 31, 2008: xCAT 2.1 released.
  • Sep 12, 2008: Support for xCAT 2
    can now be purchased!
  • June 9, 2008: xCAT breaths life into
    (at the time) the fastest
    supercomputer on the planet
  • May 30, 2008: xCAT 2.0 for Linux
    officially released!
  • Oct 31, 2007: IBM open sources
    xCAT 2.0 to allow collaboration
    among all of the xCAT users.
  • Oct 31, 1999: xCAT 1.0 is born!
    xCAT started out as a project in
    IBM developed by Egan Ford. It
    was quickly adopted by customers
    and IBM manufacturing sites to
    rapidly deploy clusters.