Tips for working with Bright Manager
 
[Jul 14, 2017] How to restart sgeexec on nodes 
      
         Restart sgeecexd on compute nodes
         $ service sgeexecd stop 
         $ service sgeexecd start
      
   
   How do I set up a local Bright repository?
1. Copy the Bright yum repo file,
         /etc/yum.repos.d/cm.repo, from the 
         head node to the server where you're going to create the local mirror.
2. Get the repository ID:
    (on the mirror server)
    # 
         yum clean all
# yum 
         repo list
[...]
cm-rhel6-7.0 Cluster Manager 7.0 for Red Hat Enterprise Linux 6 301+8
cm-rhel6-7.0-updates Cluster Manager 7.0 for Red Hat Enterprise Linux 6 - Updates 371
[...]
   3. Sync the repository locally:
    # 
         mkdir -p /path/to/local/yum/repo/cm-rhel6-7.0
# 
         reposync --gpgcheck -l --repoid=cm-rhel6-7.0 -n
# 
         createrepo -v /path/to/local/yum/repo/cm-rhel6-7.0
# 
         mkdir -p /path/to/local/yum/repo/cm-rhel6-7.0-updates
# 
         reposync --gpgcheck -l --repoid=cm-rhel6-7.0 -n
# 
         createrepo -v /path/to/local/yum/repo/cm-rhel6-7.0-updates
   4. You may need to create local repositories for
         ceph-* and
         epel as well since some Bright 
         packages may have some dependencies which are provided by these repositories.
  We would like to know when exactly the clone of an image has 
         completed. This is so we can automate some image update and test processes. Ie: we clone an 
         image, apply updates to the clone, assign that updated image to a category, and reboot a 
         node for testing the updated image.
However, the current "clone/commit" process goes into the background. This makes 
         programmatically determining when it finished rather difficult. Can we make the commit of 
         an image clone wait for completion in the cmsh shell so our script will wait before 
         attempting to apply updates?
In 6.0 the
         --wait option to the commit command 
         makes cmsh wait for any background task 
         to complete. A list of tasks that are waiting for 
         completion can be seen with cmsh -A -c "task list"
   For versions of BCM prior to 6.0, the following technique can be used:
   
The CMDaemon will not start the background copy operation if the target directory already 
         exists. So what you can do from a bash script is something like this:
cp -a /cm/images/default-image /cm/images/new-image
cmsh -c "softwareimage; clone default-image new-image; commit"
   The first line guarantees the copy is done (and exits after the cp is done). That means 
         that the second line  does pretty much nothing except for housekeeping, which lets cmd then 
         know of new-image. In particular for the second line, cloning, which normally runs in the 
         background to carry out the copy, doesn't do any copying because that was already done.
   Applying updates to the images can then be carried out without needing to test if the 
         clone has completed.
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History:
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and its Influence of Computer Science : Richard Stallman 
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two types of people: those who understand what they do not manage and those who manage what they do not understand ~Archibald Putt. 
Ph.D
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Last modified:
March, 12, 2019