Use Customized Scripts To Configure NIC

If using customized script to configure NIC, niccustomscripts for the specified nic in nics table should be configured. In the customized scripts, it can use data from xCAT DB, These data are parsed as global value from /xcatpost/mypostscript in compute node. Here is a simple example :

  1. Compute node cn1 with one physical NIC: eth1

  2. Put customized script cfgeth1 under xCAT MN /install/postscripts

  3. Configure niccustomscripts in nics table ::

    chdef cn1 niccustomscripts.eth1=cfgeth1

  4. The script cfgeth1 uses data from xCAT DB, for example, it uses network net50 from networks table

    chdef -t network net50 net=50.0.0.0 mask=255.0.0.0

    Notes: The network net50 is parsed as NETWORKS_LINE1 in /xcatpost/mypostscript as following, so script cfgeth1 can use global value NETWORKS_LINE1 directly

    NETWORKS_LINE1='netname=net50||net=50.0.0.0||mask=255.0.0.0||mgtifname=||gateway=||dhcpserver=||tftpserver=||nameservers=||ntpservers=||logservers=||dynamicrange=||staticrange=||staticrangeincrement=||nodehostname=||ddnsdomain=||vlanid=||domain=||disable=||comments='

  5. When confignetwork is running in cn1, confignetwork will execute cfgeth1 to configure eth1, so adding confignetwork into the node’s postscripts list. During OS deployment on compute node, confignetwork postscript will be executed.

    chdef cn1 -p postscripts=confignetwork

  6. Or if the compute node is already running, use updatenode command to run confignetwork postscript without rebooting the node:

    updatenode cn1 -P confignetwork

  7. Use xdsh cn1 "ip addr show eth1" to check the NIC

  8. Check ifcfg-eth1 under /etc/sysconfig/network-scripts/