Re: [libvirt] using virsh remotely
Am 27.02.2009 um 15:40 schrieb Daniel P. Berrange: On Fri, Feb 27, 2009 at 03:36:15PM +0100, Andreas Rittershofer wrote: I can use virsh as a command line tool, for exampe virsh list gives me the list of the running machines and I am back to the prompt. When I make virsh -c qemu+ssh://maschine-2/system list I get the list of the running machine on the remote machine-2 - but that's it, I am not back to the prompt automatically. What version of libvirt have you got ? There is a bug in 0.6.0 which causes it to hang when disconnecting from the remote server http://www.redhat.com/archives/libvir-list/2009-February/msg00104.html I'm using Debian testing and therein is 0.5.1-6. mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] using virsh remotely
I can use virsh as a command line tool, for exampe virsh list gives me the list of the running machines and I am back to the prompt. When I make virsh -c qemu+ssh://maschine-2/system list I get the list of the running machine on the remote machine-2 - but that's it, I am not back to the prompt automatically. I want virsh to behave used remotely as used locally - execute the command and go back to the prompt. How this can be done? mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] networking with two hosts
Am 26.02.2009 um 20:26 schrieb Radek Hladik: Andreas Rittershofer napsal(a): My problem is: 1.) VM1 running on host A must have network access to VM3 when VM3 is running on host B by default _and_ 2.) when VM3 is running on host A because host B failed. In some of my configurations 1.) worked but 2.) not, in some other configurations 2.) worked but 1.) not. I must have missed some detail ... I do not see the problem. With the bridged scenario every VM has direct access to the physical network and it is not important on which host it runs. If the VMs are running on the same host, their ethernet frames will just "turn around" in the bridge interface and if they are running on different hosts they will go thru the real ethernet. State 1) A: VM1 B: VM3 Eth. frames will go like this: VM1->BrA->PhysCardA->Ethernet- >PhysCardB->BrB->VM3 State 2) A: VM1+VM3 B: x Eth. frames will go like this: VM1->BrA->VM3 NOW I've got it! The errors in my configuration were two different network configurations on host A and on host B - I always thought that the network on host A and the network on host B must have different IP addresses. Now there is only on network configuration for host A _and_ host B and everything is fine! Thank you very much for your help! mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] networking with two hosts
Am 25.02.2009 um 23:28 schrieb Radek Hladik: Andreas Rittershofer napsal(a): Am 25.02.2009 um 00:11 schrieb David Lutterkort: On Tue, 2009-02-24 at 14:25 +0100, Andreas Rittershofer wrote: Task 1.) Each VM must have network access to each other VM and to the outside. Task 2.) When one host fails, all VMs are running on the remainig host and 1.) must still be fulfilled. Does somebody has any hints about realising this scenario with libvirt and KVM? Thank you for your answer. Basically the idea is like this. You have your hosts on one ethernet segment. You create bridge on each hosts and put hosts physical adapter into it (lets call the bridges BrA and BrB). The bridge behaves like a virtual ethernet switch. You should configure IP on the bridge not on the physical interface itself. And now if you add any other adapter into the bridge, it will act as if it is directly on the ethernet. This has been used for bridging two or more ethernet segments into one for a long time. This was not the problem and runs fine. If you setup your VMs correctly (see the wiki page for details), libivirt will create hosts virtual adapter and add it to the bridge. For example for VM1 running on A it will create i.e. vnet1 and add it to the bridge BrA. The virtualized interface in the VM1 will have direct access to the ethernet segment. It can have IP address from the same range as the hosts, etc... This was not the problem too and runs fine too. My problem is: 1.) VM1 running on host A must have network access to VM3 when VM3 is running on host B by default _and_ 2.) when VM3 is running on host A because host B failed. In some of my configurations 1.) worked but 2.) not, in some other configurations 2.) worked but 1.) not. I must have missed some detail ... mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] networking with two hosts
Am 25.02.2009 um 00:11 schrieb David Lutterkort: On Tue, 2009-02-24 at 14:25 +0100, Andreas Rittershofer wrote: Task 1.) Each VM must have network access to each other VM and to the outside. Task 2.) When one host fails, all VMs are running on the remainig host and 1.) must still be fulfilled. Does somebody has any hints about realising this scenario with libvirt and KVM? What you want is a 'shared network interface'[1] David [1] http://wiki.libvirt.org/page/Networking#Bridged_networking_.28aka_.22shared_physical_device.22.29 Thank you for this answer - but it is too short. I'm working since two days on this problem but I cannot solve it until now. Some configurations are working when the VMs are on different nodes but are failing when all machines are running on one node and vice versa. Can you please go in more details? mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] networking with two hosts
The following situation is given: Host A with VM1 and VM2 running. Host B with VM3 und VM4 running. Task 1.) Each VM must have network access to each other VM and to the outside. Task 2.) When one host fails, all VMs are running on the remainig host and 1.) must still be fulfilled. Does somebody has any hints about realising this scenario with libvirt and KVM? mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] networking with VMs on two nodes
I have two nodes and on each several virtual machines running under KVM/qemu. I've set up the default-network on each node and so I can: 1.) ping from host do guest 2.) ping from guest to host 3.) ping from guest tu guest But all this is only possibe on each node by itself. What I need now is network connection between a VM on node 1 to another VM on node 2. How to setup this? When both nodes are fine every node runs a few guests. But when one node goes down, all guests have to be run on the remaining node. mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] Networking with libvirt
Am 22.02.2009 um 21:11 schrieb Andreas Rittershofer: 2.) It runs only one or two minutes and than dies. I have to reboot the virtual machine to get it up and running again - and I don't no why either. The network connection is very unstable: When there is no traffic ping runs and runs and there are no problems. When there is traffic, i.e. when I try an aptitude update/upgrade, the connection breaks down and I have to reboot the VM. What could this be? mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
Re: [libvirt] Networking with libvirt
Am 22.02.2009 um 17:25 schrieb Andreas Rittershofer: I want to setup networking under KVM and with libvirt. I read a lot the last two days, but it is not working as desired. I don't want bridging, I want it with a tap-device created via vde_switch. I cannot figure out what to put in /etc/libvirt/qemu/machine.xml and / etc/libvirt/qemu/networks/network.xml - there is no really good documentation. /var/log/libvirt/qemu/maschine.log shows a lot of parameters when I start the VM with virsh start machine, but I cannot figure out where to set these values or where to set the defaults. Now the network is running - but: 1.) I don't know why. 2.) It runs only one or two minutes and than dies. I have to reboot the virtual machine to get it up and running again - and I don't no why either. mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
[libvirt] Networking with libvirt
I want to setup networking under KVM and with libvirt. I read a lot the last two days, but it is not working as desired. I don't want bridging, I want it with a tap-device created via vde_switch. I cannot figure out what to put in /etc/libvirt/qemu/machine.xml and /etc/ libvirt/qemu/networks/network.xml - there is no really good documentation. /var/log/libvirt/qemu/maschine.log shows a lot of parameters when I start the VM with virsh start machine, but I cannot figure out where to set these values or where to set the defaults. mfg ar -- Hier könnte keine Signatur stehen. -- Libvir-list mailing list Libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
