[one-users] Hung sshd processes on VM hosts

[Steven Timm]

We recently deployed several new and bigger hosts on our OpenNebula 3.2 
cloud and are seeing some issues.  At this point we are not sure if we are 
dealing with an OS problem with the sshd or something else.
But the symptom is that we see a OpenNebula monitoring process come into 
the VM host as oneadmin, do its thing but then the sshd process
(owned by root) that spawned the process starts using up to 100% of system 
cpu, and it is not killable at all.  strace of the sshd process simply 
hang. Eventually a lot of these build up on the VM host and it is almost

impossible to do anything.  Only way to kill them we have found so far
is to restart the parent sshd and then we can kill all the child sshd 
processes.


The symptom tends to happen when there are more than 20 virtual machines 
on the same host.  These are new Ivy-Bridge based hosts that should be 
good for at least 40 VM's apiece.


Has anyone seen anything like this before?  And yes, I know the 4.x series 
of opennebula is a lot more efficient in its monitoring and we are trying 
to get there as fast as we can.


Steve Timm
--
Steven C. Timm, Ph.D  (630) 840-8525
t...@fnal.gov  http://home.fnal.gov/~timm/
Fermilab Scientific Computing Division, Scientific Computing Services Quad.
Grid and Cloud Services Dept., Associate Dept. Head for Cloud Computing
___
Users mailing list
Users@lists.opennebula.org
http://lists.opennebula.org/listinfo.cgi/users-opennebula.org

Re: [one-users] Error running sunstone when built from source

[Stephen Levy]

They are running on the same server.  I have installed 4.4.1 on Centos 6.2,
and it seems to work correctly.  The issue seems to only occur on Centos
6.4 and above.



*From:* Daniel Molina [mailto:dmol...@opennebula.org]
*Sent:* Tuesday, March 11, 2014 11:09 AM
*To:* Stephen Levy
*Cc:* users@lists.opennebula.org
*Subject:* Re: [one-users] Error running sunstone when built from source



Hi,



On 7 March 2014 18:03, Stephen Levy  wrote:

I have installed version 4.4.1 from source on Centos 6.5, and the
opennebula server and sunstone server seem to startup correctly, however,
when I try to log into sunstone, it seems to accept my username and
password, and it starts to show the main dashboard, but then it immediately
stops and goes back to the login screen.  I don't see any errors in the
log.  I thought it might have been a permissions problem, but everything
seems to be correct there.  Any ideas as to what might be going on?



Please check if the system clock is sync'd in the server where sunstone is
running



Cheers






Thanks,

Stephen



This e-mail, and any attachments, is intended only for use by the
addressee(s) named herein and may contain legally privileged and/or
confidential information.  It is the property of Telogis.  If you are not
the intended recipient of this e-mail, you are hereby notified that any
dissemination, distribution or copying of this e-mail, any attachments
thereto, and use of the information contained, is strictly prohibited.  If
you have received this e-mail in error, please notify the sender and
permanently delete the original and any copy thereof.


___
Users mailing list
Users@lists.opennebula.org
http://lists.opennebula.org/listinfo.cgi/users-opennebula.org





-- 

--

Daniel Molina
Project Engineer
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org | dmol...@opennebula.org | @OpenNebula

-- 


This e-mail, and any attachments, is intended only for use by the 
addressee(s) named herein and may contain legally privileged and/or 
confidential information.  It is the property of Telogis.  If you are not 
the intended recipient of this e-mail, you are hereby notified that any 
dissemination, distribution or copying of this e-mail, any attachments 
thereto, and use of the information contained, is strictly prohibited.  If 
you have received this e-mail in error, please notify the sender and 
permanently delete the original and any copy thereof.
___
Users mailing list
Users@lists.opennebula.org
http://lists.opennebula.org/listinfo.cgi/users-opennebula.org

[one-users] User Stories - OpenNebula at BIT.nl

[Ignacio M. Llorente]

Dear Community,

It is always good to hear user stories on how people are using OpenNebula
in their production environments.

Our friends of BIT.nl just wrote a nice blog post [1] explaining why they
chose OpenNebula, and their experiences comparing OpenNebula versus
OpenStack.

An interesting excerpt from the post:

"We have done internet research on some main CMP's: OpenStack, Eucalyptus,
oVirt, OpenNebula. Two of them were tested in a lab environment: OpenStack
and OpenNebula. We had lots of trouble getting OpenStack working, hit some
bugs, etc. In the end we could never get it to do what we wanted. It became
clear the project is moving fast, at least code was flying around,
subprojects became different entities of themselves, etc. We were worried
it would take a lot of time to get it all running, let alone upgrade to
newer versions.

OpenNebula worked pretty much out of the box, besides a bug with
OpenvSwitch that stood in the way at first. We wanted to have a platform
that would be able to work with different hypervisors. We're using KVM now,
but for one reason or the other VMware, XEN, or Hyper-V should be possible.
We didn't want to restrict ourselves to only one (that's why oVirt didn't
make it). Besides that it should be easy to understand how things are tied
together, basically KISS. If systems get overly complex sooner or later you
get bitten by them. You don't have complete oversight of every little
component and when the shit hits the fan you don't know were to start
cleaning.

...

In a nutshell, the benefits of using OpenNebula are:
- Simple but powerful / flexible
- Works out of the box
- Easy to maintain / upgrade
- (API) Interface(s)
- OSS
- Great community / development organization (that became obvious as soon
as we joined the mailing list)"

Big thanks to Stefan Kooman for writing this post.

BIT.nl is hosting our first OpenNebula TechDay in Ede, The Netherlands (
http://opennebula.org/community/techdays/ede2014/). There are still some
seats available, so be quick to register.

If you are using OpenNebula in your company, and you want to share your
setup with the rest of the OpenNebula community, let us know!

The OpenNebula Team

[1] http://opennebula.org/using-opennebula-at-bit/

-- 
Ignacio M. Llorente, PhD, MBA
Project Director
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org | imllore...@opennebula.org |
@OpenNebul
___
Users mailing list
Users@lists.opennebula.org
http://lists.opennebula.org/listinfo.cgi/users-opennebula.org