Re: [CentOS-virt] Would a hardware TRNG benefit VMs?
On Sat, 13 Jul 2013, Digimer wrote: > Hi all, > >I've been curious about using hardware true random number generators > in my VM clusters. This got me wondering about the VM's /dev/random > source... If I setup a hardware TRNG on the host, would the VM's also > benefit from it? Xen VMs would not be able to benefit from it. I don't know about KVM. ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] Ethernet Not Talking
After applying a number of updates to both the host and the virtual machines, I had one virtual machine which would not talk to the network after the updates. Rebooting numerous times didn't help, I couldn't see anything wrong with either it's configuration or the bridge on the host machine. I ended up restoring that machine from an image and then re-applying the updates and then everything was okay. Amoung other things the updates included an update to glibc. I was wondering if anyone else encountered something similar and had come to a better understanding of what went wrong? -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- Eskimo North Linux Friendly Internet Access, Shell Accounts, and Hosting. Knowledgeable human assistance, not telephone trees or script readers. See our web site: http://www.eskimo.com/ (206) 812-0051 or (800) 246-6874. ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Xen Balloon Driver on PVHVM CentOS6
Hi List, It seems that the xen balloon functionality for guest is not enabled in CentOS 3.4.50-8.el6 xen kernel by default via centos-release-xen.x86_64 repo. I think this should have been present since this extra Xen repo needs to support as both Guest and Host (Dom0). The kernel had to be recompiled with CONFIG_XEN_SELFBALLOONING. How can I request to make it default enable in centos repo ? or is there any reason to not have it default ? Thanks. On Fri, Jul 12, 2013 at 7:42 PM, Rushikesh Jadhav <2rushike...@gmail.com>wrote: > Hi List, > > I'm trying to work out the balloon driver on CentOS6 HVM but it seems to > be not working with default 2.6.32 or newer 3.4 kernel. > > Does balloon driver work on HVM linux guests with Linux Kernel 3.4 from > centos repo ? > > PV is fine and is able to balloon. > > My host is Xen 4.1.2 with dom0 as 3.4.46-8.el6.centos.alt.x86_64 > My guest is CentOS6.4 with kernel 3.4.46-8.el6.centos.alt.x86_64 > > Please have a look at below guest logs, > [root@hvmc6 ~]# uname -a Linux hvmc6 3.4.50-8.el6.centos.alt.x86_64 #1 > SMP Fri Jun 21 03:14:22 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux > [root@hvmc6 ~]# xenstore-ls memory initial-reservation = "1193984" > initial-target = "1048576" static-max = "16777216" target = "1048576" > dynamic-min = "1048576" dynamic-max = "1048576" memory-offset = "-258100" > [root@hvmc6 ~]# dmesg | grep -i balloon xen/balloon: Initialising balloon > driver. xen-balloon: Initialising balloon driver. > [root@hvmc6 ~]# free -m total used free shared buffers cached Mem: 463 > 221 241 0 24 13 -/+ buffers/cache: 184 278 Swap: 9987 7 9980 > > > When I try to set it manually from host, I get > # xl mem-set 229 2049 xc: error: do_memory_op: WARNING: op=16 not > converted to safe ioctls: Internal error > > Anyone has made CentOS6 PVHVM work with ballooning on Xen ? > > Thanks. > Rushikesh > > > ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Would a hardware TRNG benefit VMs?
On 15/07/13 07:04, Stefano Stabellini wrote: > On Sat, 13 Jul 2013, Digimer wrote: >> Hi all, >> >> I've been curious about using hardware true random number generators >> in my VM clusters. This got me wondering about the VM's /dev/random >> source... If I setup a hardware TRNG on the host, would the VM's also >> benefit from it? > > Xen VMs would not be able to benefit from it. I don't know about KVM. Would you be able to elaborate on why not? I know Xen and KVM differ, but this is not a topic I have seen discussed at all before, so any insight would be helpful and appreciated! :) digimer -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] No eth0 in dom0 after installing xen
I've just installed CentOS 6.4 an Xen on a new system, and eth0 is not found on dom0 when booting into Xen. When I boot into the 2.6.32 kernel outside Xen my network interface is found, using the e1000e driver. If I boot into Xen eth0 is not found, even if I modprobe the e1000e driver by hand. My NIC is an Intel I217-V. Any suggestions for things I can do to get my network working inside Xen? Thanks, Mark ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] No eth0 in dom0 after installing xen
On Mon, Jul 15, 2013 at 8:50 PM, Mark Nejedlo wrote: > I've just installed CentOS 6.4 an Xen on a new system, and eth0 is not found > on dom0 when booting into Xen. When I boot into the 2.6.32 kernel outside > Xen my network interface is found, using the e1000e driver. If I boot into > Xen eth0 is not found, even if I modprobe the e1000e driver by hand. My NIC > is an Intel I217-V. > > Any suggestions for things I can do to get my network working inside Xen? Is it finding any other eth devices? (eth1, eth2, etc) Verify the MAC address in the /etc/sysconfig/network-scripts/ifcfg-eth0 file matches what you have in the Xen configuration (xm list -l ). If not then remove it. > Thanks, > Mark -Gene ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
