- Users - libvirt List Archives

[libvirt-users] virsh console and other language keymaps
by Michael Taboada 29 Nov '18

29 Nov '18

Hi, I've got a small vm server running kvm + libvirt, and I made a simple shell script that allows users to ssh in and control their vms (power off, etc). However, one of my users uses the french canadian keyboard layout on her home computer, and upon being told "escape character is ^]" expected to need to press ctrl+right-alt_] (] being in the same location it is on a US keyboard). This is because on a french canadian layout, the right bracket key is in the same spot at on US layout, but needs to press right alt with it or it is the c-cedilla key. However, upon pressing ctrl+right-alt+c-cedilla, nothing happens (even this is ctrl+right bracket on a canadian keyboard). Instead, pressing ctrl+c-cedilla on her canadian french keyboard exits the console as if it were using a US layout. My question: how to make it so pressing ctrl+(canadian ]) works? Is this something that has to be done on the vm side, or on the host side, or maybe on the client ssh side? I'd prefer it be something thast can be different based on who is using the virsh console command since me, as the admin, may need to help with the console at some points, and my keyboard is US, so I have no c-cedilla or canadian right bracket key, but she does. Thanks, -Michael.

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[libvirt-users] Unable to configure libxl's memory management parameters
by Mathieu Tarral 28 Nov '18

28 Nov '18

Hi ! I'm trying to get a working installation of Xen 4.11 from source, with Libvirt. I managed to compile, install and boot on Xen so far. But when I start the libvirt daemon, it fails with the following error: info : libvirt version: 4.1.0, package: 5.fc28 (Fedora Project, 2018-08-23-19:00:58, buildvm-19 error : libxlDriverConfigNew:1644 : Unable to configure libxl's memory management parameters error : virStateInitialize:775 : Initialization of LIBXL state driver failed: no error error : daemonRunStateInit:837 : Driver state initialization failed So there are 2 things here: - why libvirt is unable to configure Libxl ? where should i look for any clues ? - "Initialization of LIBXL state driver failed: no error" it looks like a bug in Libvirt, if it fails, an error message should be reported Thank you. -- Mathieu Tarral Sent with ProtonMail Secure Email.

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[libvirt-users] Sasl+tls setup
by Anastasiya Ruzhanskaya 28 Nov '18

28 Nov '18

Hello everyone, I am trying to set up sasl authentication in virt-manager. I read in one existing bug, that it is better to use tls for encryption and sasl for authentication, but not use sasl for both. I configured tls, it was fine. Then I created a user "u" on server and modified libvirtd.conf. I set auth_tls = "sasl" there and mech_list: scram-sha-1 in sasl2 config for libvirt. The output of sasl: u@ubuntu2:~$ sudo sasldblistusers2 -f /etc/libvirt/passwd.db u@ubuntu: userPassword Then I connect to server using tls and entering as the user u. Then I have the following message: Unable to connect to libvirt qemu+tls://u@192.168.246.135/system. authentication failed: authentication failed What are the correct steps to set up everything right. I just followed this: set up tls, set up user, modify config file, relaunch and connect.

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[libvirt-users] Sasl + tls setup
by Anastasiya Ruzhanskaya 28 Nov '18

28 Nov '18

Hello everyone, I am trying to set up sasl authentication in virt-manager. I read in one existing bug, that it is better to use tls for encryption and sasl for authentication, but not use sasl for both. I configured tls, it was fine. Then I created a user "u" on server and modified libvirtd.conf. I set auth_tls = "sasl" there and mech_list: scram-sha-1 in sasl2 config for libvirt. The output of sasl: u@ubuntu2:~$ sudo sasldblistusers2 -f /etc/libvirt/passwd.db u@ubuntu: userPassword Then I connect to server using tls and entering as the user u. Then I have the following message: Unable to connect to libvirt qemu+tls://u@192.168.246.135/system. authentication failed: authentication failed What are the correct steps to set up everything right. I just followed this: set up tls, set up user, modify config file, relaunch and connect.

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[libvirt-users] External Snapshots vs Core Dump.
by Tanmoy Sinha 26 Nov '18

26 Nov '18

Hi, I would like to get a clear picture on external snapshots memory dump ( i.e. system-checkpoint) vs dumping the memory of the guest. I have created external snapshots which produces a disk file and a memory file. I am not able to use this memory file in any memory analysis tools, for instance volatility. However, the memory dump taken through "virsh dump" works just fine with such tools. What am I missing here? The memory dump generated through external snapshot seems to be compressed, compared to the one generated by virsh dump. Can I specify the memory dump format in the snapshot XML? Was reading through a couple of old threads in libvirt-users, haven't found anything conclusive. If this is a redundant query, guide me me to the thread. Thanks, Tanmoy

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[libvirt-users] lvm vs qcow (on NVMe)
by lejeczek 26 Nov '18

26 Nov '18

hi guys, anybody observed, maybe has measured performance difference between the two with qemu quests(windows OS)? Any conclusions, recommendations? many thanks, L.

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[libvirt-users] Sasl authentication
by Anastasiya Ruzhanskaya 26 Nov '18

26 Nov '18

Hello everyone, I am trying to set up sasl authentication in virt-manager. I read in one existing bug, that it is better to use tls for encryption and sasl for authentication, but not use sasl for both. I configured tls, it was fine. Then I created a user "u" on server and modified libvirtd.conf. I set auth_tls = "sasl" there and mech_list: scram-sha-1 in sasl2 config for libvirt. The output of sasl: u@ubuntu2:~$ sudo sasldblistusers2 -f /etc/libvirt/passwd.db u@ubuntu: userPassword Then I connect to server using tls and entering as the user u. Then I have the following message: Unable to connect to libvirt qemu+tls://u@192.168.246.135/system. authentication failed: authentication failed What are the correct steps to set up everything right. I just followed this: set up tls, set up user, modify config file, relaunch and connect.

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[libvirt-users] user information sent when using sasl or tls
by Anastasiya Ruzhanskaya 26 Nov '18

26 Nov '18

Hello everyone! I am trying without any success to decipher traffic from client to server in virt-manager in wireshark, but I don't know the sessioon key there, so seems no chance to do this. This is why I want to ask, is any info related to the certificate sent through the connection? Or if I use kerberos protocol for authentication, will the user id be sent in every message from client to server? Or only during authentication?

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[libvirt-users] Long time to restart guest
by Jesson 23 Nov '18

23 Nov '18

Hello, my guest is professional Windows, the version is 10. Standby (display lights up) After more than 2 days, if we restart on Windows (do not restart X with virsh), the reboot takes a long time, maybe about 7 minutes. But all kvm logs are normal, and the guest state is running, only the linux system log gives me some messages. My guests only started after resetting all the devices. So what should I do to get started quickly? there are my environment: Compiled against library: libvirt 4.4.0 Using library: libvirt 4.4.0 Using API: QEMU 4.4.0 Running hypervisor: QEMU 2.12.0 Linux: LFS 7.10 Kernel: 4.17.2

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[libvirt-users] Remote and local connections at the same time (Centos 7)
by Anastasiya Ruzhanskaya 22 Nov '18

22 Nov '18

Hello! I was investigating libvirt a year ago regarding it's remote control. I figured out necessary settings for configuring remote control in ubuntu (setting flags in libvirt setting files). Now I have several questions: 1) Are these flags the same for Centos? They did not worked for me. My flags for ubuntu are (for tcp for example): /etc/libvirt/libvirtd.conf : listen_tls = 0, listen_tcp = 1, listen_addr = "0.0.0.0 " auth_- tcp = "none " /etc/init/libvirt-bin.conf: add -l (listen) : env libvirtd_opts = d -l" /etc/default/libvirt-bin add -l : libvirtd_opts = d -l" 2) Can the remote control be configured along with local on one machine? For example, in one configuration I want to run libvirt on this machine and accept incoming remote calls, and at the same time I want to be able to run virtual machines locally on the same machine. Are these two things somehow connected or I am free to set up both of them? As I see the flags touch not only libvirtd settings, but also libvirt settings.

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