Best -------------------------- Xu Qing (徐清) IBM China Software Development Laboratory
Email: [email protected] Address: Building 28, ZhongGuanCun Software Park, No.8, Dong Bei Wang West Road, Haidian District Beijing 100193, PRC 北京市海淀区东北旺西路8号中关村软件园28号楼 邮编: 100193 Yuriy Halytskyy <y.halytskyy@auck land.ac.nz> To xCAT Users Mailing list 2013/12/06 10:19 <[email protected]>, cc Please respond to Subject xCAT Users [xcat-user] xcat and systemImager Mailing list <xcat-user@lists. sourceforge.net> We recently moved from rinstall to system imager to speed up imaging and ensure consistency, but there are few issues. 1) Install is much faster for single node, but reimaging 100+ nodes at the same time is very slow over 1gig network. Is it possible to change the IP of rsync server for images? I want to move to 10G interface on management server without changing dhcp interface. Also, is it possible to use 9000 MTU on genesis kernel. I added "option interface-mtu 9000" to dhcp.conf and this works once the machine is re-imaged, but not during imaging process. [XQ]: compute nodes should use the ip address that got from management node to download files from management node. So compute nodes should use the dhcp interface to communicate with management node, but you do not want to change the dhcp interface. So currently, can not use the 10G interface directly. Currently, the genesis can not configure the mtu for interface. 2) clone fails because it tries partition the drives before OS sees them. It works when delay is added to *.master script. But it has to be done manually every time new image is created # # END disk enumeration ################################################################################ logmsg "Sleep to wait for disk to show up" sleep 60 [XQ]: systemimager has a template file "/etc/systemimager/autoinstallscript.template", all *.master scripts were create based on this file. You can modify this file, and all new *.master scripts will be contains all modifications. 3) fstab mounts use UUIDs. SystemImager is smart enough to change UUID for ext4 partition, but not for fat UEFI partition. This is not a big problem because we don't use UEFI-based tools on the host, but would be nice to have this fixed for aesthetic reasons. [XQ]: Thanks for your suggestion, xCAT sysclone based on sysmtemimager, we can report this problem to systemimager. 4) New boot entry is appended for every clone. It means that frequently imaged node may have dozens of "Linux" entries in boot order. [XQ]: What is you xCAT version. In xCAT 2.8.3, sysclone will delete the old UEFI boot label before create new boot label entry, the label name is " syscloneLinux" in xCAT 2.8.3 5) We have a lot of different machines with westmere/sandybridge/nahelem, connectx2/connectx3, tesla/kepler gpus and different amounts of RAM. Do we need images for every combination? For example, will the image built on sandybridge work on westmere with no issues? And is OFED compiled on machine with connect2x card not optimized for connect3x ? [XQ]: We only test sysclone on homogeneous machines(same cpu, same disk). For heterogeneous machines, may meet errors. Systemimager is based on filesystem, if all kinds of machines have same filesystem, and same disks, same os. It may work, but we did not test this scenario. Cheers, Yuriy ------------------------------------------------------------------------------ Sponsored by Intel(R) XDK Develop, test and display web and hybrid apps with a single code base. Download it for free now! http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk _______________________________________________ xCAT-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/xcat-user
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