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1608 discussions

Remove viewer for Mac desktop
by Philip Prindeville 30 Sep '18

30 Sep '18

Hi. I have a couple of Mac’s I use (a MBP 15” and a Mac mini), but I have a stack of Linux KVM/Qemu hosts (Centos 7.5) running various VM’s (Ubuntu, Fedora, Win7, Win10, etc). Currently I ssh in with tunneling for X, and let the VNC client draw remotely on XQuartz. It’s reasonably fast on my 1Gb network, but glitchy (hangs, pointer location being wrong, spurious keyboard repeats, refreshing the bottom 1/8 of the screen over and over for no reason, etc). I’ve been told the Wayland+QXL on the guest, and remote Spice over SSH, is the way to go, but I’ve only found one (fairly out-of-date) OS X client (RemoveViewer.app from https://www.spice-space.org/osx-client.html). I’m not sure if the client is using an out of date API that has really poor performance, or I’ve misconfigured things, or what. Can someone in a similar situation post what they’re doing to get satisfactory performance? Especially if it works well on slower (10mb/s) connections when on the road, etc. Thanks, -Philip

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how to update ucode with xen
by Christoph 19 Sep '18

19 Sep '18

Hi can someone say me how to update the µcode of the cpu with xen? I have added the ucode=scan parameter to xen but it does not seem to work... the µcode version of my xeon is really old :/ model name : Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz microcode : 0x10 -- ------ Greetz

3 5

virsh doesn't support vtpm using XEN?
by Dag Nygren 14 Sep '18

14 Sep '18

Hi again! More TPM + XEN stuff. have look at the following: ================= "xl list -l centos7.0" ============== [ { "domid": 31, "config": { "c_info": { "type": "hvm", "name": "centos7.0", "uuid": "feef6cac-8148-4040-a7cb-ad1f82d8d68a", "run_hotplug_scripts": "True" }, "b_info": { "max_vcpus": 4, "avail_vcpus": [ 0, 1, 2, 3 ], "max_memkb": 4194304, "target_memkb": 4194304, "video_memkb": 8192, "shadow_memkb": 36864, "localtime": "False", "sched_params": { }, "claim_mode": "True", "acpi": "True", "type.hvm": { "pae": "True", "apic": "True", "viridian": "False", "vga": { }, "vnc": { "enable": "True", "listen": "127.0.0.1", "findunused": "True" }, "keymap": "en-us", "sdl": { "enable": "False" }, "spice": { }, "serial": "pty", "boot": "c", "usb": "True", "usbdevice": "tablet", "rdm": { } }, "arch_arm": { } }, "disks": [ { "pdev_path": "/dev/node_b_vg/testimage", "vdev": "hda", "format": "raw", "readwrite": 1, "colo_restore_enable": "False" } ], "nics": [ { "devid": 0, "mac": "00:16:3e:7c:04:3a", "bridge": "bc_br0", "script": "vif-bridge", "nictype": "vif_ioemu" }, { "devid": 1, "mac": "00:16:3e:b4:c1:c6", "bridge": "mgmt_br0", "script": "vif-bridge", "nictype": "vif_ioemu" }, { "devid": 2, "mac": "00:16:3e:3a:78:01", "bridge": "dsip_int_br0", "script": "vif-bridge", "nictype": "vif_ioemu" }, { "devid": 3, "mac": "00:16:3e:fd:44:a6", "bridge": "dsip_ext_br0", "script": "vif-bridge", "nictype": "vif_ioemu" } ], "vtpms": [ { "backend_domname": "vtpm01", "devid": 0, "uuid": "163088d1-1565-49a0-8e0b-64dfc62460bc" } ], "on_reboot": "restart", "on_soft_reset": "soft_reset" } } ] ======================================================= And then: ============== "virsh dumpxml centos7.0" ============== <domain type='xen' id='3'> <name>centos7.0</name> <uuid>feef6cac-8148-4040-a7cb-ad1f82d8d68a</uuid> <memory unit='KiB'>4194304</memory> <currentMemory unit='KiB'>4194304</currentMemory> <vcpu placement='static'>4</vcpu> <os> <type arch='x86_64' machine='xenfv'>hvm</type> <loader type='rom'>/usr/lib64/xen/boot/hvmloader</loader> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/lib64/xen/bin/qemu-system-i386</emulator> <disk type='block' device='disk'> <driver name='phy' type='raw'/> <source dev='/dev/node_b_vg/testimage'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='ide' index='0'/> <interface type='bridge'> <mac address='00:16:3e:7c:04:3a'/> <source network='back_channel' bridge='bc_br0'/> <target dev='vif3.0-emu'/> </interface> <interface type='bridge'> <mac address='00:16:3e:b4:c1:c6'/> <source network='management' bridge='mgmt_br0'/> <target dev='vif3.1-emu'/> </interface> <interface type='bridge'> <mac address='00:16:3e:3a:78:01'/> <source network='dsip_int' bridge='dsip_int_br0'/> <target dev='vif3.2-emu'/> </interface> <interface type='bridge'> <mac address='00:16:3e:fd:44:a6'/> <source network='dsip_ext' bridge='dsip_ext_br0'/> <target dev='vif3.3-emu'/> </interface> <serial type='pty'> <source path='/dev/pts/5'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/5'> <source path='/dev/pts/5'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='tablet' bus='usb'/> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='vnc' port='5901' autoport='yes' listen='127.0.0.1' keymap='en-us'> <listen type='address' address='127.0.0.1'/> </graphics> <video> <model type='cirrus' vram='8192' heads='1' primary='yes'/> </video> </devices> </domain> ======================================================= A closer look at this will reveal the correct vtpm specification for the native xl command, but it is completely missing from the XML when running virsh. Do we need a more current version of libvirt? Best Dag

1 0

virsh support for TPM?
by Dag Nygren 13 Sep '18

13 Sep '18

Hi again! Succeeded in creating vtpmmgr-stubdom.gz from the source RPM with some shortcuts. ow the next problem seems to be that the libvirt we have will not support the XEN vtpm:s For example: virsh dumpxml <vm-machine> will not contain any info on the vtpm :-( Am I really the first one around with a need for TPM support in the VM:s ?? Best Dag

3 2

We need a patch in the kernel for tpm
by Dag Nygren 13 Sep '18

13 Sep '18

Hi! Think I found a reference to the problem(s) I am seeing with xen-tpmfront in my setup on the net: https://patchwork.kernel.org/patch/9485637/ This patch has not been officially entered and it is not included in the kernel provided in SIG virt either Can we please get it in ? Best Dag

2 4

ANNOUNCE: centos-release-xen switching to 4.8 next week
by Anthony PERARD 13 Sep '18

13 Sep '18

Greeting, We are about to update the centos-release-xen package to point to Xen 4.8 rather than 4.6. I'll push the update next week. As a reminder, you can "pin" your installation to Xen 4.6 by installing centos-release-xen-46 and then removing centos-release-xen. And for the more adventurous, that update will come with a new package centos-release-xen-410 to install Xen 4.10. (Testing will be updated today.) Cheers, -- Anthony PERARD

5 4

vtpm support in the rpms ?
by Dag Nygren 05 Sep '18

05 Sep '18

Hi! Trying to enable vtpm in a Centos7 XEN installation and can find very little of the needed stuff. Is vtpm enabled in the SIG rpms? Best Dag

1 1

TPM
by Dag Nygren 31 Aug '18

31 Aug '18

Hi all! Just setting up a cluster using Centos 7 We have a desperate need for TPM support and: 1. Tried the "standard" distro install. linvirt supports TPM passthrough but kvm-qemu barfs: "unsupported configuration: The QEMU executable /usr/libexec/qemu-kvm does not support TPM backend type passthrough" 2. The activated the qemu-ev repo and updated qemu-kvm to version 2.10.0, which for sure should support at least passthrough. No luck - Same error message. Downloaded the source for th rpm and found a line: "--disable-tpm" in build_configure.sh. Guess that the maintainers has some reason to turn tpm off. Can somone confirm this? 3. And now what next? The setup would really need swtpm, which should be available in 2.11.0. Can someone confirm that tpm will be enabled here? Would also be nice having a libvirt that will accept the swtpm configuration. the current don't like it. Could of course recompile qemu myself, but really wouldn't like going that route. The sheer number of patches applied is quite scary... Best Dag

5 13

Virt SIG meetings in August
by George Dunlap 10 Aug '18

10 Aug '18

FYI, I won't be around for the Virt SIG meetings on 21 August or 4 September. Does anyone want to step up and chair those, or should we just take a summer holiday and cancel them? -George

2 1

Network Problem KVM
by Günther J. Niederwimmer 21 Jul '18

21 Jul '18

Hello List, CentOS 7.5 I have a question about a KVM problem (??) with my Servers, I hope any have a answer. ;-) My situation is, I have three server two identical motherboards and one 19" Server. The problem is the configuration with the Bridge Interface! On my motherboards I have configured a NIC for bridge, on the 19" Server I have the virbr0 from KVM configured. All Server (motherboards) have a Intel I350 Ethernet Controller on Board, I configured this NIC's with the "igb" driver and in the KVM clients with with the "hostdev" option this two Interfaces are starting always correct. But the "BRIGED" interfaces is the third Interface on all "servers", is starting only sometimes :-(. I have to check all clients after a kernel update for correct networking? The only way to have again correct working clients is to reboot or stop and start the clients sometimes three or four times and again..... I have on all "Servers" 4-6 KVM Clients and this is a BIG problem for me! Why is this possible (?), is my configuration broken or is a driver broken or....... thanks for a answer and help is possible, -- mit freundlichen Grüssen / best regards, Günther J. Niederwimmer

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