[CentOS-virt] Centos virsh - add a physical device
Hi, If I create a guest which uses (hvm) can I add access to physical device like cdrom? Regards, f...@ll ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] IP aliases of CentOS Guests not accessible running 2.6.18-164.el5xen
Hi all, First of all I am posting this on two lists for a reason, because the issue being reported by me could be because of a change delivered by a Kernel update or due to Xen. I have recently managed to update all Xen Guest domains running CentOS 5.3 to the latest bunch of updates + Kernel. My Xen host also runs the same CentOS 5.3 updated to all recent packages. The Guest images in concern had IP aliases assigned to them. Everything worked until I ran the updates and restarted. Since I have restarted the aliased IP addresses are no longer accessible from the outside world, they can still be accessed from all machines (guest virtual machines) in the subnet (ping, services like http). I have removed all firewall rules to test if that would have effected it without any change (any the fact that I can access them within the subnet proves its not the firewall). Is there anything special I have to do to enable aliasing? May be this is a Xen issue? I am suspecting the Xen host, but not sure how to go about proving this. Any information would be greatly appreciated. My Guests do run fail2ban (delivered via atrpms) and iptables (allowing only HTTP, HTTPS and SSH) connections. PS for obvious reasons I am not posting IP addresses and routes etc first up, I can make that information available if required. -- The secret impresses no-one, the trick you use it for is everything - Alfred Borden (The Prestiege) ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] IP aliases of CentOS Guests not accessible running 2.6.18-164.el5xen
- Devraj Mukherjee dev...@gmail.com wrote: Since I have restarted the aliased IP addresses are no longer accessible from the outside world, they can still be accessed from all machines (guest virtual machines) in the subnet (ping, services like http). I have removed all firewall rules to test if that would have effected it without any change (any the fact that I can access them within the subnet proves its not the firewall). Assuming you are using bridging, do you see ingress packets at dom0's ethernet interface(s), dom0's bridge(s), and the guests' interfaces? If so, do you see the guests' reply packets where you expect them? -- Christopher G. Stach II ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
On Mon, Sep 28, 2009 at 6:43 AM, Dennis J. denni...@conversis.de wrote: Hi, Is there a way to make a PV xen guest aware of a size change of the host disk? In my case I'm talking about a Centos 5.3 host using logical volumes as storage for the guests and the guests running Centos 5.3 and LVM too. What I'm trying to accomplish is to resize the logical volume for the guest by adding a few gigs and then make the guest see this change without requiring a reboot. Is this possible maybe using some kind of bus rescan in the guest? Regards, Dennis Last time I checked this wasn't supported. Grant McWilliams Some people, when confronted with a problem, think I know, I'll use Windows. Now they have two problems. ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
Dennis J. wrote: Hi, Is there a way to make a PV xen guest aware of a size change of the host disk? In my case I'm talking about a Centos 5.3 host using logical volumes as storage for the guests and the guests running Centos 5.3 and LVM too. What I'm trying to accomplish is to resize the logical volume for the guest by adding a few gigs and then make the guest see this change without requiring a reboot. Is this possible maybe using some kind of bus rescan in the guest? No, it's not possible unfortunately. On a traditionnal SCSI bus you can rescan the whole bus to see newer/added devices or just the device to see newer size, but not on a Xen domU . At least that's what i found when i blogged about that . See that thread on the Xen list : http://lists.xensource.com/archives/html/xen-users/2008-04/msg00246.html So what i do since then is to use lvm in the domU as well and add a new xvd block device to the domU (aka a new LV on the dom0) and then the traditionnal pvcreate/vgextend/lvextend. Working correctly for all my domU's .. -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z $idea echo sorry, init 6 in progress || sh ./answer.sh ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
On 28/09/09 17:37, Fabian Arrotin wrote: So what i do since then is to use lvm in the domU as well and add a new xvd block device to the domU (aka a new LV on the dom0) and then the traditionnal pvcreate/vgextend/lvextend. Working correctly for all my domU's .. how are you able to add a new disk without a reboot ? or is that something that works with the xenblock drivers ? - KB ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
- Karanbir Singh mail-li...@karan.org wrote: how are you able to add a new disk without a reboot ? or is that something that works with the xenblock drivers ? xm block-attach -- Christopher G. Stach II ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
Karanbir Singh wrote: On 28/09/09 17:37, Fabian Arrotin wrote: So what i do since then is to use lvm in the domU as well and add a new xvd block device to the domU (aka a new LV on the dom0) and then the traditionnal pvcreate/vgextend/lvextend. Working correctly for all my domU's .. how are you able to add a new disk without a reboot ? or is that something that works with the xenblock drivers ? Yes, i've only PV domU's ;-) virsh attach-disk /path/to/lv/on/the/domO xvd[letter as it appears on the domU] -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z $idea echo sorry, init 6 in progress || sh ./answer.sh ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Resizing disks for VMs
On 09/28/2009 06:37 PM, Fabian Arrotin wrote: Dennis J. wrote: Hi, Is there a way to make a PV xen guest aware of a size change of the host disk? In my case I'm talking about a Centos 5.3 host using logical volumes as storage for the guests and the guests running Centos 5.3 and LVM too. What I'm trying to accomplish is to resize the logical volume for the guest by adding a few gigs and then make the guest see this change without requiring a reboot. Is this possible maybe using some kind of bus rescan in the guest? No, it's not possible unfortunately. On a traditionnal SCSI bus you can rescan the whole bus to see newer/added devices or just the device to see newer size, but not on a Xen domU . At least that's what i found when i blogged about that . See that thread on the Xen list : http://lists.xensource.com/archives/html/xen-users/2008-04/msg00246.html So what i do since then is to use lvm in the domU as well and add a new xvd block device to the domU (aka a new LV on the dom0) and then the traditionnal pvcreate/vgextend/lvextend. Working correctly for all my domU's .. I just tested this and it works great, thanks! Regards, Dennis ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Centos virsh - add a physical device
On Mon, 2009-09-28 at 08:05 +0200, f...@ll wrote: Hi, If I create a guest which uses (hvm) can I add access to physical device like cdrom? Regards, f...@ll Yes, you are able to add a CDROM device to your guest. You can add either a physical drive or an ISO image. Are you using virt-manager or just config files at the command line? Tait ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Centos virsh - add a physical device
Tait Clarridge pisze: On Mon, 2009-09-28 at 08:05 +0200, f...@ll wrote: Hi, If I create a guest which uses (hvm) can I add access to physical device like cdrom? Regards, f...@ll Yes, you are able to add a CDROM device to your guest. You can add either a physical drive or an ISO image. Are you using virt-manager or just config files at the command line? Tait ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt Hi, I using only a comman line, my centos server have only text console without a X server. I used a virsh. f...@ll ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Centos virsh - add a physical device
On Mon, 2009-09-28 at 22:17 +0200, f...@ll wrote: Tait Clarridge pisze: On Mon, 2009-09-28 at 08:05 +0200, f...@ll wrote: Hi, If I create a guest which uses (hvm) can I add access to physical device like cdrom? Regards, f...@ll Yes, you are able to add a CDROM device to your guest. You can add either a physical drive or an ISO image. Are you using virt-manager or just config files at the command line? Tait ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt Hi, I using only a comman line, my centos server have only text console without a X server. I used a virsh. f...@ll Can you post the config file for the guest? ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Centos virsh - add a physical device
Tait Clarridge pisze: On Mon, 2009-09-28 at 22:17 +0200, f...@ll wrote: Tait Clarridge pisze: On Mon, 2009-09-28 at 08:05 +0200, f...@ll wrote: Hi, If I create a guest which uses (hvm) can I add access to physical device like cdrom? Regards, f...@ll Yes, you are able to add a CDROM device to your guest. You can add either a physical drive or an ISO image. Are you using virt-manager or just config files at the command line? Tait ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt Hi, I using only a comman line, my centos server have only text console without a X server. I used a virsh. f...@ll Can you post the config file for the guest? ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt This is a guest config file with xml and native format: cat win2khvm.xml domain type='xen' id='50' namewin2k8-hvm/name uuidc53ac13f-d32f-9934-8c0b-a8728fb52f19/uuid memory1048576/memory currentMemory1048576/currentMemory vcpu1/vcpu os typehvm/type loader/usr/lib/xen/boot/hvmloader/loader boot dev='hd'/ /os features acpi/ apic/ pae/ /features clock offset='utc'/ on_poweroffdestroy/on_poweroff on_rebootrestart/on_reboot on_crashrestart/on_crash devices emulator/usr/lib/xen/bin/qemu-dm/emulator disk type='block' device='disk' driver name='phy'/ source dev='/dev/vol1/win2k8'/ target dev='hda' bus='ide'/ /disk disk type='block' device='cdrom' driver name='phy'/ source dev='/dev/cdrom'/ target dev='hdc' bus='ide'/ readonly/ /disk interface type='bridge' mac address='00:16:36:2a:e4:15'/ source bridge='eth0'/ script path='/etc/xen/scripts/vif-bridge'/ target dev='vif50.0'/ /interface serial type='pty' source path='/dev/pts/2'/ target port='0'/ /serial console type='pty' tty='/dev/pts/2' source path='/dev/pts/2'/ target port='0'/ /console input type='mouse' bus='ps2'/ graphics type='vnc' port='5900' autoport='yes' keymap='en-us'/ /devices /domain Native config: cat win2k8.cfg name = win2k8-hvm uuid = c53ac13f-d32f-9934-8c0b-a8728fb52f19 maxmem = 1024 memory = 1024 vcpus = 1 builder = hvm kernel = /usr/lib/xen/boot/hvmloader boot = c pae = 1 acpi = 1 apic = 1 localtime = 0 on_poweroff = destroy on_reboot = restart on_crash = restart device_model = /usr/lib/xen/bin/qemu-dm vfb = [ type=vnc,vncunused=1,keymap=en-us ] disk = [ phy:/dev/vol1/win2k8,hda,w, phy:/dev/cdrom,hdc:cdrom,r ] vif = [ mac=00:16:36:2a:e4:15,bridge=eth0,script=vif-bridge,vifname=vif50.0 ] parallel = none serial = pty ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
