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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Copyleft Problems
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(May, 2013) Corporate bullshit as a communication method :
Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law
History:
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Classic books:
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Law : 1984 :
The Mythical Man-Month :
How to Solve It by George Polya :
The Art of Computer Programming :
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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