Changes between Version 61 and Version 62 of xCAT

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Timestamp:
09/20/10 17:51:46 (9 years ago)
Author:
shuang (IP: 152.54.8.247)
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  • xCAT

    v61 v62  
    194194 Note that the regular expression appends -ipmi to host name (e.g. n01-ipmi). Make sure your dns is setup correctly to resolve the host name. Also, the username/password will overwrite what's in passwd table. 
    195195 
    196  3. '''Important for PE 860:''' When you do a netboot or net installation, you probably have to press F12 manually so the machine enters PXE boot mode first -- nodeset netboot/ipmitool chassis bootdev pxe will '''not''' do the work it's supposed to do! I think Dell did not enable this feature until 1950. 
     196 3. '''Important for PE 860:''' When you do a netboot or net installation, you probably have to press F12 manually so the machine enters PXE boot mode first -- nodeset netboot/ipmitool chassis bootdev pxe will '''not''' do the work it's supposed to do! I think Dell did not enable this feature until 2950. 
    197197 
    198198=== PXE configuration === 
     
    249249  1. cat /tftpboot/xcat/netboot/centos5.5/x86_64/compute/initrd.gz| gzip -d | cpio -i 
    250250  1. less init, the first line is 
    251  {{{ 
    252  !/sbin/busybox.anaconda sh 
    253  }}} 
     251  {{{ 
     252  !/sbin/busybox.anaconda sh 
     253  }}} 
    254254  1. ldd sbin/busybox.anaconda 
    255255  1. copy all the missing libs to lib64 or lib, take care of symbol links separately 
     
    258258  1. cp initrd.gz /tftpboot/xcat/netboot/centos5.5/x86_64/compute/initrd.gz 
    259259  1. nodeset compute netboot 
    260  
     260 5. Create images for compute nodes with different architectures. Turns out we also have a couple of PE 2950. After updating BIOS to latest, rsetboot boot works as expected. However, since it has an architecture different from the head node (PE 860), the image has to be created differently. First, the PE 2950 does not use tg3 driver for ethernet interfaces. Do to create the image we run: 
     261 {{{ 
     262 #genimage -i eth0 -n tg3,bnx2 -o centos5.5 -p compute 
     263 }}} 
     264 Then, follow the rest instructions. However in our case the compute node (2950) and the head node (860) are somewhat similar. For a more general case that the architectures are significantly different, you should mount /install in head node to compute node (on your head node /install should already be exported in /etc/exports), then generate the image on the compute node (refer to genimage manpage for details).  
    261265=== Node discovery === 
    262266With xCAT, a node can be powered on and discovered automatically. Unlike the previous cases that nodes have to be known by the head node so that the head node can issue some ipmi commands to boot/install a compute node, in this case, the node can be rather unknown to the head node. However, some configurations are needed to make this work.