-- ColinLeavettBrown - 2015-06-22

Cloud howto: running batch jobs with HTCondor/Cloud Scheduler

  • Obtain images - three methods:
    1. Use cloud provided default images (installed as public images by sysadmins) - easiest method.
    2. Download an existing image (see OpenStack image guide, section 2):
      • Select and image and copy its' URL
      • Use the horizon "Create Image" dialog and copied URL to upload the required image to your cloud account.
    3. Create image with virt-install (and cobbler):
      1. Hardware confguration
      2. On hypervisor node,
        • create and run /root/qemu/mk-cc-demo. This will create a virtual machine with a vnc console that will fail to boot. At this point, the vnc console can be closed.
        • Issue "virsh edit cc-demo" and copy the "MAC" address.
        • Modify /root/qemu/mk-cc-demo to include the copied MAC address.
        • "virsh destroy cc-demo"
        • "virsh undefine cc-demo"
      3. On cobbler server:
        • Create a public/private ssh key: ssh-keygen -f /root/.ssh/id_rsa_cc-demo
        • Create a /var/lib/cobbler/kickstarts/cc-demo.cfg suitable to your application needs. You can create an encrypted root password following [[][these instructions]].
          • Copy your new public key to the end of your kickstart file.
        • Create /root/cobbler/add-cc-demo specifying the kickstart file and the copied MAC address. Run the shell script and then "cobbler sync"
      4. On the hupervisor node:
        • Re-run the "mk-cc-demo" shell script. This will recreate the VM with a vnc console, but this time it will boot/install.
        • After the reboot, log in and make any required customizations (see, OpenStack image guide, section 5).
        • Remove any UDEV network rules that exist (ie. "rm -f /etc/udev/rules.d/70-persistent-net.rules), the hardware address from the network interface, and halt the VM.
        • Convert the image to qcow2 format: "qemu-img convert -O qcow2 cc-demo.img cc-demo.qcow2".
        • Use the horizon "Create Image" dialog to upload the image to your cloud account.

  • Customizing images:
    • Interractive instantiation:
    • login as root and modify image
    • Snapshot

  • Running batch jobs:
    • Prepare executable
    • Prepare JDL
    • Prepare data souces and repositories
    • Submit jobs
    • Monitoring jobs
    • Retrieving job output

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng CobblerInstallVM.png r2 r1 manage 85.8 K 2015-07-06 - 19:10 UnknownUser  
Unknown file formatEXT add-cc-demo r1 manage 0.4 K 2015-07-06 - 18:17 UnknownUser  
Unknown file formatcfg cc-demo.cfg r2 r1 manage 2.6 K 2015-07-06 - 19:55 UnknownUser  
Unknown file formatEXT mk-cc-demo r2 r1 manage 0.5 K 2015-07-06 - 19:12 UnknownUser  

This topic: HEPrc > WebHome > CloudHowToForCC
Topic revision: r5 - 2015-07-06 - crlb
 
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