Re: [one-users] ttylinux via ssh not accessible any more after migrate / suspend - resume
Hi Viktor, that's a very interesting problem. Let's check if it's related to the bridge. Start the vm and execute 'brctl show' on one host. Migrate it to another host and execute 'brctl show' on that second host. Compare those outputs and check if libvirt/kvm is correctly attaching the network interface to the bridge. cheers, Jaime On Fri, Sep 3, 2010 at 12:54 AM, Viktor Mauch ma...@kit.edu wrote: hello javier, one more time, I'm now working with OpenNebula 2.0beta with the KVM Hypervisor (head node and cluster nodes are based on 10.04). I tried to play with the supported ttylinux image form the ONE website. Starting the machine and login via ssh is no problem. After Stop - Resume the machine is still available via network. But if I perform a migration of the the machine or suspend - resume, the network conncetion is gone (ping / ssh find no aim). I looked via VNC into the VM, and everything looks ok, the eth0 device is still configured right, but also no possibility to ping something others outside the VM. Restarting of the network did not solve the problem. The log files are clear. All physical hosts are in the same switch. Does anyone have an idee what goes wrong?? Greets Viktor Am 30.08.2010 11:32, schrieb Javier Fontan: Hello, Can you try to access it by other means to check if there is something broken in the VM? If you are using xen you should be able to access it using xm console from the physical node. With KVM you can add VNC access to it. If the machine seems to be in good shape there can also be some problem in the network relearning where the machine is. Are both physical hosts in the same switch? Bye On Mon, Aug 30, 2010 at 12:56 AM, Viktor Mauchma...@kit.edu wrote: Hello, I use ONE 1.4 with a shared NFS and play a litle bit with the ttylinux image which automatically configures the eth0 device during booting. The VM is accessible via SSH and everything looks fine. After livemigration, normal migration or suspend-resume the ssh connection is no longer available: $ ssh r...@vm_ip ssh: connect to host VM_IP port 22: No route to host Greets Viktor ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] What kinds of shared storage are you using?
Dear Szekelyi, You could consider to contribute the new driver to our ecosystem and/or write a post in our blog describing your customization. Thanks! On Fri, Sep 3, 2010 at 1:07 AM, Andreas Ntaflos d...@pseudoterminal.org wrote: On Friday 03 September 2010 00:28:23 Székelyi Szabolcs wrote: We're using iSCSI targets directly (one target per vm), automatically created and initialized (cloned) from images on vm deploy. Althogh the target is based on IET behind gigabit links, it works quite well: we haven't done performance benchmarks (yet), but the installation time of virtual machines is kinda same than on real hardware. That sounds interesting and very similar to what we hope to achieve using OpenNebula and a central storage server (as I've posted a few hours ago, not realising this thread here is very similar in nature). We developed a custom TM driver for this, because this approach makes live migration trickier, since just before live migration the target host needs to log in to the iSCSI target hosting the disks of the vm, and this is something ONE can't do, so we used libvirt hooks to do this -- works like a charm. Libvirt hooks are also good for reattaching virtual machines to their virtual networks on live migration -- again something ONE doesn't do. Would you care to go into a little detail regarding your custom TM driver? Maybe even post the sources? I'd be very interested in learning more about your approach to this. Thanks! Andreas -- Andreas Ntaflos GPG Fingerprint: 6234 2E8E 5C81 C6CB E5EC 7E65 397C E2A8 090C A9B4 ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org -- Ignacio M. Llorente, Full Professor (Catedratico): http://dsa-research.org/llorente DSA Research Group: web http://dsa-research.org and blog http://blog.dsa-research.org OpenNebula Open Source Toolkit for Cloud Computing: http://www.OpenNebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] What kinds of shared storage are you using?
On Friday 03 September 2010 14.54.06 Ignacio M. Llorente wrote: You could consider to contribute the new driver to our ecosystem and/or write a post in our blog describing your customization. Our development is sponsored by the state, thus everything we develop will be open sourced, and so, it'd be an honour to contribute this to the OpenNebula ecosystem. This is an ongoing development, and the TM driver is just a small part of it. On the other hand, in our environment it has been quite stable for a couple of weeks now, so I think it's time to do an alpha release. I'll use the weekend to gather all its dependencies, wrap it up and write some docs about it. Expect a release in the beginning of next week. Thank you for your interest. Cheers, -- cc On Fri, Sep 3, 2010 at 1:07 AM, Andreas Ntaflos d...@pseudoterminal.org wrote: On Friday 03 September 2010 00:28:23 Székelyi Szabolcs wrote: We're using iSCSI targets directly (one target per vm), automatically created and initialized (cloned) from images on vm deploy. Althogh the target is based on IET behind gigabit links, it works quite well: we haven't done performance benchmarks (yet), but the installation time of virtual machines is kinda same than on real hardware. That sounds interesting and very similar to what we hope to achieve using OpenNebula and a central storage server (as I've posted a few hours ago, not realising this thread here is very similar in nature). We developed a custom TM driver for this, because this approach makes live migration trickier, since just before live migration the target host needs to log in to the iSCSI target hosting the disks of the vm, and this is something ONE can't do, so we used libvirt hooks to do this -- works like a charm. Libvirt hooks are also good for reattaching virtual machines to their virtual networks on live migration -- again something ONE doesn't do. Would you care to go into a little detail regarding your custom TM driver? Maybe even post the sources? I'd be very interested in learning more about your approach to this. Thanks! Andreas -- Andreas Ntaflos GPG Fingerprint: 6234 2E8E 5C81 C6CB E5EC 7E65 397C E2A8 090C A9B4 ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] What kinds of shared storage are you using?
We are using GlusterFS and it works great :) With some tweaking we were able to average around 90-120 megabits per second on reads and 25-35 megabits per second on writes. Configuration is as follows: 2 file servers: - Supermicro server motherboard with Intel Atom D510 - 4GB DDR2 RAM - 6 x Western Digital RE3 500GB hard drives - Ubuntu 10.04 x64 (on a 2GB USB stick) - RAID 10 File servers are set up with replication and we have a total of 1.5TB of storage dedicated to virtual machine storage with ability to grow it to petabytes on demand - just add more nodes! Slava Yanson, CTO Killer Beaver, LLC w: www.killerbeaver.net c: (323) 963-4787 aim/yahoo/skype: urbansoot Follow us on Facebook: http://fb.killerbeaver.net/ Follow us on Twitter: http://twitter.com/thekillerbeaver On Wed, Sep 1, 2010 at 8:48 PM, Huang Zhiteng winsto...@gmail.com wrote: Hi all, In my open nebula 2.0b testing, I found NFS performance was unacceptable (too bad). I haven't done any tuning or optimization to NFS yet but I doubt if tuning can solve the problem. So I'd like to know what kind of shared storage you are using. I thought about Global File System v2 (GFSv2). GFSv2 does performs much better (near native performance) but there's limit of 32 nodes and setting up GFS is complex. So more important question, how can shared storage scales to 100 node cloud? Or this question should be for 100 node cloud, what kind of storage system should be used? Please give any suggestion or comments. If you have already implement/deploy such an environment, it'd be great if you can share some best practice. -- Below there's some details about my setup and issue: 1 front-end, 6 nodes. All machines are two socket Intel Xeon x5570 2.93Ghz (16 threads in total), with 12GB memory. There's one SATA RAID 0 box (630GB capacity) connected to front-end. Network is 1Gb Ethernet. OpenNebula 2.0b was installed to /srv/cloud/one on front-end and then exported via NFSv4. Also front-end exports RAID 0 partition to /srv/cloud/one/var/images. The Prolog stage of Creating VM always caused frond-end machine almost freeze (slow response to input, even OpenNebula command would timeout) in my setup. I highly suspect the root cause is poor performance NFS. -- Regards Huang Zhiteng ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
Re: [one-users] Hook for VM becoming UNKNOWN state
Hi, The other thing we may want to look at is to detect that the VM is stopped in libvirt and move the VM to shutdown-epilog-done. There is a ticket for this http://dev.opennebula.org/issues/335 Cheers Ruben On Fri, Sep 3, 2010 at 8:13 PM, Shi Jin jinzish...@yahoo.com wrote: Hi, there, I would like to have a hook to run a script when the user shuts down the VM from inside the OS. When that happens, the VMState=ACTIVE and LCM_STATE=UNKNOWN. Is it possible to add this to the hook system of OpenNebula? Otherwise, which code should I look for to add some custom code after it gets into UNKNOWN? Thanks a lot. -- Shi Jin, PhD ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org -- Dr. Ruben Santiago Montero Associate Professor (Profesor Titular), Complutense University of Madrid URL: http://dsa-research.org/doku.php?id=people:ruben Weblog: http://blog.dsa-research.org/?author=7 ___ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
