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Installing Kali Linux as Guest OS in KVM Hypervisor
by Kaushal Shriyan 11 Dec '20

11 Dec '20

Hi, I have run the below command to install Kali Linux using linux-2020.4-installer-amd64.iso from https://www.kali.org/downloads/ #virt-install --name kalilinux --memory 4096 --vcpus=2 --location=/linuxkvmaddgbdisk/kali-linux-2020.4-installer-amd64.iso,kernel=install.amd/gtk/vmlinuz,initrd=install.amd/gtk/initrd.gz --network=bridge:br0 --os-type=linux --os-variant=debian9 --graphics=none --extra-args "console=ttyS0" -v --disk path=/linuxkvmaddgbdisk/kalilinux.img,size=50 I am not able to get the root login prompt when I run the below command to set IP and hostname for the guest OS. Am I missing any parameters from the above virt-install command to install Kali Linux as Guest OS in KVM Hypervisor? #virsh console kalilinux Connected to domain kalilinux Escape character is ^] Any help will be highly appreciated. I look forward to hearing from you. Thanks in Advance. Best Regards, Kaushal

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[CFP] Virtualization & IaaS Devroom
by Piotr Kliczewski 11 Dec '20

11 Dec '20

We are excited to announce that the call for proposals is now open for the Virtualization & IaaS devroom at the upcoming FOSDEM 2021, to be hosted virtually on February 6th 2021. This year will mark FOSDEM’s 21th anniversary as one of the longest-running free and open source software developer events, attracting thousands of developers and users from all over the world. Due to Covid-19, FOSDEM will be held virtually this year on February 6th & 7th, 2021. About the Devroom The Virtualization & IaaS devroom will feature session topics such as open source hypervisors and virtual machine managers such as Xen Project, KVM, bhyve, and VirtualBox, and Infrastructure-as-a-Service projects such as KubeVirt, Apache CloudStack, Foreman, OpenStack, oVirt, QEMU and OpenNebula. This devroom will host presentations that focus on topics of shared interest, such as KVM; libvirt; shared storage; virtualized networking; cloud security; clustering and high availability; interfacing with multiple hypervisors; hyperconverged deployments; and scaling across hundreds or thousands of servers. Presentations in this devroom will be aimed at users or developers working on these platforms who are looking to collaborate and improve shared infrastructure or solve common problems. We seek topics that encourage dialog between projects and continued work post-FOSDEM. Important Dates Submission deadline: 20th of December Acceptance notifications: 25th of December Final schedule announcement: 31st of December Recorded presentations upload deadline: 15th of January Devroom: 6th February 2021 Submit Your Proposal All submissions must be made via the Pentabarf event planning site[1]. If you have not used Pentabarf before, you will need to create an account. If you submitted proposals for FOSDEM in previous years, you can use your existing account. After creating the account, select Create Event to start the submission process. Make sure to select Virtualization and IaaS devroom from the Track list. Please fill out all the required fields, and provide a meaningful abstract and description of your proposed session. Submission Guidelines We expect more proposals than we can possibly accept, so it is vitally important that you submit your proposal on or before the deadline. Late submissions are unlikely to be considered. All presentation slots are 30 minutes, with 20 minutes planned for presentations, and 10 minutes for Q&A. All presentations will need to be pre-recorded and put into our system at least a couple of weeks before the event. The presentations should be uploaded by 15th of January and made available under Creative Commons licenses. In the Submission notes field, please indicate that you agree that your presentation will be licensed under the CC-By-SA-4.0 or CC-By-4.0 license and that you agree to have your presentation recorded. For example: "If my presentation is accepted for FOSDEM, I hereby agree to license all recordings, slides, and other associated materials under the Creative Commons Attribution Share-Alike 4.0 International License. Sincerely, <NAME>." In the Submission notes field, please also confirm that if your talk is accepted, you will be able to attend the virtual FOSDEM event for the Q&A. We will not consider proposals from prospective speakers who are unsure whether they will be able to attend the FOSDEM virtual event. If you are experiencing problems with Pentabarf, the proposal submission interface, or have other questions, you can email our devroom mailing list[2] and we will try to help you. Code of Conduct Following the release of the updated code of conduct for FOSDEM, we'd like to remind all speakers and attendees that all of the presentations and discussions in our devroom are held under the guidelines set in the CoC and we expect attendees, speakers, and volunteers to follow the CoC at all times. If you submit a proposal and it is accepted, you will be required to confirm that you accept the FOSDEM CoC. If you have any questions about the CoC or wish to have one of the devroom organizers review your presentation slides or any other content for CoC compliance, please email us and we will do our best to assist you. Call for Volunteers We are also looking for volunteers to help run the devroom. We need assistance with helping speakers to record the presentation as well as helping with streaming and chat moderation for the devroom. Please contact devroom mailing list [2] for more information. Questions? If you have any questions about this devroom, please send your questions to our devroom mailing list. You can also subscribe to the list to receive updates about important dates, session announcements, and to connect with other attendees. See you all at FOSDEM! [1] <https://penta.fosdem.org/submission/FOSDEM17>https://penta.fosdem .org/submission/FOSDEM21 [2] iaas-virt-devroom at lists.fosdem.org

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Cannot passthrough usb with bus number and device number
by YaoHua Wu 08 Dec '20

08 Dec '20

Sometimes, qemu cannot find correct usb device number Reproduce steps: 1、lsusb Bus 001 Device 011: ID 090c:1000 1、prepare usb device attach xml <hostdev managed="yes" mode="subsystem" type="usb"> <source> <vendor id="0x090c" /> <product id="0x1000" /> <address bus='001' device='011'/> </source><address bus="1" port="1" type="usb" /> </hostdev> 2、virsh attach-device vm usb.xml error: internal error: Did not find USB device 090c:1000 bus:1 device 9 Question: why the device number returned in qemu's error report is not what I wrote in xml， what I mean is that if my dev number is really wrong, the returned error should also be the number I wrote， commonly when using dongle Look forward to your reply yaohua.wu

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unable to migrate when TLS is used
by Vjaceslavs Klimovs 07 Dec '20

07 Dec '20

With libvirt 6.9.0, qemu 5.1.0, and following configurations: libvirt: key_file = "/etc/ssl/libvirt/server.lan.key" cert_file = "/etc/ssl/libvirt/server.lan.crt" ca_file = "/etc/ssl/libvirt/ca.crt" log_filters="3:remote 4:event 3:util.json 3:rpc 1:*" log_outputs="1:file:/var/log/libvirt/libvirtd.log" qemu: default_tls_x509_cert_dir = "/etc/ssl/qemu" default_tls_x509_verify = 1 migration with tls: virsh # migrate vm1 qemu+tls://server2.lan/system --persistent --undefinesource --copy-storage-all --verbose --tls never succeeds. Progress stops typically at high progress amounts (95%-98%), and network traffic drastically drops as well (from 1 gbps+ to nothing). domjobinfo progress also stops. Without --tls migrations succeed without issues without any other changes to hosts or configurations. Logs of failed migration: Source: https://drive.google.com/file/d/1d0dJumicW0TUdG1osNxNnWWiYpfAaIb_/view?usp=… Destination: https://drive.google.com/file/d/1d0dJumicW0TUdG1osNxNnWWiYpfAaIb_/view?usp=… Same exact hosts, successful migration logs (without --tls): Source: https://drive.google.com/file/d/1d0dJumicW0TUdG1osNxNnWWiYpfAaIb_/view?usp=… Destination: https://drive.google.com/file/d/1EWkCkSBhj76T05k86QjdL-6icJyruK5-/view?usp=… Should I report this as a bug or is there an issue with my configuration?

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Nfs mount 'gone' after vm's start
by Marc Roos 05 Dec '20

05 Dec '20

I have had a nfs-ganesha mount provision install images for vm's, and recently I have the mount stall after starting a vm. (even when it does not access an iso image on the nfs mount) I have the host ip on a macvtap of the connected interface. The vm is also having an macvtap on the same interface to allow host-guest communication. I am mounting the nfs with these options. nfs4 ro,vers=4,proto=tcp,soft,nodev,_netdev,noatime,timeo=30,x-systemd.device -timeout=30,x-systemd.mount-timeout=30,x-systemd.automount,x-systemd.idl e-timeout=30 0 0 The problem is fixed by doing a simple 'umount -l' Anyone seen something similar? I suspect this could be related by the macvtap being created, but I cannot remember seeing this mount fail before.

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apparmor DENIED on domain shutdown
by Francesc Guasch 05 Dec '20

05 Dec '20

Hi. I upgraded one of my servers to Ubuntu 20.04. Since then domains won't shutdown. They are in the "in shutdown" state. I googled around and I found it is probably because of apparmor. I see this message in the logs: kernel: [740222.848210] audit: type=1400 audit(1606983397.013:338): apparmor="DENIED" operation="signal" profile="libvirt-a2c1456f-3371-49eb-9fa4-f8576ca4e878" pid=2375 comm="libvirtd" requested_mask="receive" denied_mask="receive" signal=term peer="libvirtd" I tried to run this but it does nothing: aa-complain /usr/sbin/libvirtd The only solution I found was to run aa-disable to the machine id so it can be shut down. I found some similar issues but I can't figure out what I have to tweak in the apparmor files. If you can point me to some doc may be I skipped I will or any solution I would appreciate it. This is - Ubuntu 20.04 - libvirt 6.0.0-0 - qemu-kvm 1:4.2-3 Thank you very much.

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qemu guest agent(QGA) in guest OS
by Henry lol 02 Dec '20

02 Dec '20

Hello, AFAIK, QGA is automatically installed and run in guest OS after installing OS from iso file whereas it's not installed in case of installing OS on the host even with same iso and configuration. So, I am wondering how it works differently depending on the guest or host. Does the OS installer selectively install packages? thanks.

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How to exit console in L2 vm?
by Yalan Zhang 01 Dec '20

01 Dec '20

Hi, I have a question about nested virtualization. The scenario is as below: 1. Prepare the nested environment, start L2 guest. 2. On the host, connect the L1 vm console, then on L1 guest, connect the L2 guest console: (host)# virsh console L1_vm Connected to domain L1_vm Escape character is ^] (Ctrl + ]) ... (L1 vm)# virsh console L2_vm Connected to domain L2_vm Escape character is ^] (Ctrl + ]) ... (L2 vm)# <=== press " ^] " to exit the console, it return to the **host** (host)# Is it expected that "^]" in L2 guest will exit thoroughly to the host, not the L1 guest? Thank you! ------- Best Regards, Yalan Zhang IRC: yalzhang

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qemu no-shutdown behavior in libvirt
by Luna Xu Yamada 30 Nov '20

30 Nov '20

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Debugging virtiofs
by Popog 26 Nov '20

26 Nov '20

I can't seem to start a VM with virtiofs. Everything is running as root (unraid) with a pretty simple setup: <filesystem type='mount' accessmode='passthrough'> <driver type='virtiofs'/> <binary path='/usr/libexec/virtiofsd' /> <source dir='/mnt/user/shared'/> <target dir='shared_mount'/> </filesystem> Even with debug logging at max, all I get in the main log is: qemu-system-x86_64: -device vhost-user-fs-pci,chardev=chr-vu-fs0,tag=shared_mount,bus=pci.5,addr=0x0: Failed to write msg. Wrote -1 instead of 12. qemu-system-x86_64: -device vhost-user-fs-pci,chardev=chr-vu-fs0,tag=shared_mount,bus=pci.5,addr=0x0: vhost_dev_init failed: Operation not permitted shutting down, reason=failed And in the fsd log: [ID: 00029648] virtio_session_mount: Waiting for vhost-user socket connection... [ID: 00029648] virtio_session_mount: Received vhost-user socket connection [ID: 00000001] pivot_root(., .): Invalid argument Nothing else in any other logs (e.g. dmesg). What do these errors mean? How do I troubleshoot this?

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