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[libvirt-users] Virsh Domain - Serial port; what does the attribute “port” of the serial node's child “target” do?
by thilo.cestonaro＠ts.fujitsu.com 05 Apr '18

05 Apr '18

Hi all! I want to assign a real serialport to my kvm virtual machine via virsh. When I add the following XML snippet to the domain xml, it gets successfully attached but not as I expected it to happen. <serial type='dev'> <source path='/dev/ttyS3'/> <target type='isa-serial' port='2'> <model name='isa-serial'/> </target> <alias name='ua-Serial3'/> </serial> I expected, that given the target port 2 it will be connected to /dev/ttyS2 in the VM. But the target port gets totaly ignored and it will always be connected to ttyS0. Unless I define another serial before this, then it is connected to ttyS1, which is just the order of the serial devices in the xml then, still ignoring the target port. So, do I understand the target port absolutely wrong or is this a bug virsh? Cheers Thilo

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[libvirt-users] IP pool x bridge
by Thiago Oliveira 03 Apr '18

03 Apr '18

Hi there! I have a question about IP Pool. I have one physical server with a ip pool with /28 and I would like to use those IP's into the guests. I have tried the below: 1-) Use bridge on physical server, create bridge in network configurations and configure the IP into the guest. Ok, works, but someone can change the IP, for example, change from 104.34.45.23/28 to 104.34.45.24/28. This is not good. How can I prevent this change by the user using bridge mode? 2-) Create a subnet pool with /29, but the system returns the error because the pool is at the same subnet of the bridge. Thanks. Thiago

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[libvirt-users] Possible to edit/apply nwfilter at runtime?
by Andre Goree 02 Apr '18

02 Apr '18

I'm trying to determine if it's possible to edit/attach/apply nwfilter rules at runtime? I.e., after a VM is already running, can I apply a nwfilter to the VM and have it work without rebooting the machine? Thus far, I've not come across a way to do so, but I thought I'd ask here before I chase my tail around Google. Thanks! -- Andre Goree -=-=-=-=-=- Email - andre at drenet.net Website - http://blog.drenet.net PGP key - http://www.drenet.net/pubkey.html -=-=-=-=-=-

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[libvirt-users] Using alias under disk in XML
by Andre Goree 31 Mar '18

31 Mar '18

I've been trying to follow the information found here [1] in order to provide an alias for RBD disks I'm defining, however it does not appear to be working and I wanted to see if I was doing something wrong. I define the alias like so (using 'virsh edit'): <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='writeback' error_policy='stop' discard='unmap'/> ...truncated... <alias name='ua-test'/> </disk> However, when I then 'virsh dumpxml {guest}', the alias is not there. There is no error given after my edits are made and saved. It just seems that libvirt is completely ignoring or removing my changes, without reason. Can anyone give any insight on why this might be happening, and/or help me with the proper way of defining the alias? 1 - https://libvirt.org/formatdomain.html -- Andre Goree -=-=-=-=-=- Email - andre at drenet.net Website - http://blog.drenet.net PGP key - http://www.drenet.net/pubkey.html -=-=-=-=-=-

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[libvirt-users] Unable to libvirt wireshark dissector
by Han Han 31 Mar '18

31 Mar '18

Hi guys, I am trying to analyze libvirt rpc protocol by wireshark. But I found wireshark doesn't dissect libvirt packets. Here are my environments operations: 1. Environments: My system: Debian GNU/Linux buster/sid with *kernel-4.15.0-1-amd64* Packages installed: *libvirt0-4.1.0-2-amd64 libvirt-wireshark-4.1.0-2-amd64 wireshark-2.4.5-1-amd64* 2. Libvirt configurations */etc/libvirt/libvirtd.conf*: *listen_tls = 0listen_tcp = 1tcp_port = "16509"auth_tcp = "none"* Libvirtd started with options *--listen* 3. Check wireshark libvirt plugin: Open menu: *Help* --> *About* *wireshark* --> *Plugins*. Libvirt plugin is found: *libvirt.so 4.1.0 dissector /usr/lib/x86_64-linux-gnu/w…rk/plugins/2.4.5/libvirt.so* 4. Set wireshark listening on *lo* interface and filter as 'tcp.port==16509'. Execute virsh command via tcp protocol: $ virsh -c qemu+tcp://localhost/system list In wireshark, packets are parsed as TCP protocol. And I cannot find Libvirt protocol in 'Decode as..' protocols list. And libvirt protocol is also not found in *Edit* --> *Preference* --> *Protocols*. So it seems libvirt packets are not dissected as libvirt protocol in wireshark. How can I use the wireshark libvirt plugin? -- Best regards, ----------------------------------- Han Han Quality Engineer Redhat. Email: hhan(a)redhat.com Phone: +861065339333 <+86%2010%206533%209333>

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[libvirt-users] nwfilter multiple IPs
by Andre Goree 30 Mar '18

30 Mar '18

I'm trying to apply a nwfilter rule for two networks on the same guest interface, like so: ~ # virsh nwfilter-dumpxml 1081532-private-both <filter name='1081532-private-both' chain='root'> <uuid>16004b94-2b62-4568-9467-169908eb4040</uuid> <rule action='accept' direction='in' priority='500'> <ip srcipaddr='10.25.104.0' srcipmask='24'/> </rule> <rule action='accept' direction='in' priority='600'> <ip srcipaddr='10.117.50.0' srcipmask='24'/> </rule> <rule action='drop' direction='in' priority='1000'/> </filter> Within the guest, the IPs are both setup on one interface, with the IP for second network (10.117.50.0/24) configured as an alias, like so: 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:00:0a:d0:4e:f3 brd ff:ff:ff:ff:ff:ff inet 10.25.104.1/24 brd 10.25.104.255 scope global eth1 valid_lft forever preferred_lft forever inet 10.117.50.1/24 brd 10.117.50.255 scope global eth1:0 valid_lft forever preferred_lft forever inet6 fe80::200:aff:fed0:4ef3/64 scope link valid_lft forever preferred_lft forever The problem I'm running into is that after applying the nwfilter, I cannot reach the second network, only the first. Is this an issue with both IPs being on the same interface? The machine I'm attempting to reach has the same exact configuration -- i.e. it has an IP on the same network for both networks. Thanks in advance for any advice that can be given. -- Andre Goree -=-=-=-=-=- Email - andre at drenet.net Website - http://blog.drenet.net PGP key - http://www.drenet.net/pubkey.html -=-=-=-=-=-

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[libvirt-users] snapshot of a raw file - how to revert ?
by Lentes, Bernd 29 Mar '18

29 Mar '18

Hi, i have the following system: pc59093:~ # cat /etc/os-release NAME="SLES" VERSION="11.4" VERSION_ID="11.4" PRETTY_NAME="SUSE Linux Enterprise Server 11 SP4" ID="sles" ANSI_COLOR="0;32" CPE_NAME="cpe:/o:suse:sles:11:4" pc59093:~ # uname -a Linux pc59093 3.0.101-84-default #1 SMP Tue Oct 18 10:32:51 UTC 2016 (15251d6) x86_64 x86_64 x86_64 GNU/Linux pc59093:~ # rpm -qa|grep -iE 'libvirt|kvm' libvirt-cim-0.5.12-0.7.16 libvirt-python-1.2.5-1.102 libvirt-client-1.2.5-15.3 kvm-1.4.2-47.1 sles-kvm_en-pdf-11.4-0.33.1 libvirt-1.2.5-15.3 I have several guests running with raw files, which is sufficent for me. Now i'd like to snapshot one guest because i make heavy configuration changes on it. >From what i read in the net is that libvirt supports snapshoting of raw files when the guest is shutdown and the file of the snapshot becomes a qcow2. Right ? I try to avoid converting my raw file to a qcow2 file. I can shutdown the guest for a certain time, that's no problem. I don't need a live snapshot. But how can i revert to my previous state if my configuration changes go wrong ? Can i do this with snapshot-revert or do i have to edit the xml file and point the hd again to the origin raw file ? What i found in the net wasn't complete clear. Thanks. Bernd -- Bernd Lentes Systemadministration Institut für Entwicklungsgenetik Gebäude 35.34 - Raum 208 HelmholtzZentrum münchen [ mailto:bernd.lentes@helmholtz-muenchen.de | bernd.lentes(a)helmholtz-muenchen.de ] phone: +49 89 3187 1241 fax: +49 89 3187 2294 [ http://www.helmholtz-muenchen.de/idg | http://www.helmholtz-muenchen.de/idg ] no backup - no mercy Helmholtz Zentrum München

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[libvirt-users] virt-install --connect lxc:///
by ales drtik 28 Mar '18

28 Mar '18

After reboot of the host i have different error message: root@blade1:~# virt-install --connect lxc:/// --name test_LXC --memory 128 --filesystem /home/lxcuser/LXC,/ --init /bin/sh WARNING No operating system detected, VM performance may suffer. Specify an OS with --os-variant for optimal results. Starting install... ERROR internal error: guest failed to start: Failure in libvirt_lxc startup: cannot find init path '/bin/sh' relative to container root: No such file or directory Domain installation does not appear to have been successful. If it was, you can restart your domain by running: virsh --connect lxc:/// start test_LXC otherwise, please restart your installation. root@blade1:~# ls -al /home/lxcuser/LXC total 24 drwxr-xr-x 6 root root 4096 Mar 28 16:09 . drwxr-xr-x+ 7 lxcuser lxcuser 4096 Mar 28 13:20 .. drwxr-xr-x 2 root root 4096 Mar 28 16:09 dev drwxr-xr-x 2 root root 4096 Mar 28 16:09 .oldroot drwxr-xr-x 2 root root 4096 Mar 28 16:09 proc drwxr-xr-x 2 root root 4096 Mar 28 16:09 sys

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[libvirt-users] virt-install --connect lxc:///
by ales drtik 28 Mar '18

28 Mar '18

Hi, I would like to install LXC container by virt-install. >From man: virt-install \ --connect lxc:/// \ --name container \ --memory 128 \ --filesystem /home/LXC,/ \ --init /bin/sh But my err is: root@blade1:/home/lxcuser/LXC# virt-install --connect lxc:/// --name test_LXC --memory 128 --filesystem \ /home/lxcuser/LXC,/ --init /bin/sh WARNING No operating system detected, VM performance may suffer. Specify an OS with --os-variant for optimal results. Starting install... ERROR internal error: guest failed to start: Failure in libvirt_lxc startup: Failed to create /home/lxcuser/LXC/.oldroot: Invalid argument Domain installation does not appear to have been successful. If it was, you can restart your domain by running: virsh --connect lxc:/// start test_LXC otherwise, please restart your installation. What is wrong with this?

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[libvirt-users] Attempt to define unprivileged LXC by libvirt
by ales drtik 23 Mar '18

23 Mar '18

Hi, i converted LXC conf to xml by: lxcuser@blade1:~/.local/share/lxc/test_deb$ virsh -c lxc:/// domxml-from- native lxc-tools /home/lxcuser/.local/share/lxc/test_deb/config <domain type='lxc'> <name>test_deb</name> <uuid>cce77799-89fd-41fd-99c1-101e00844e23</uuid> <memory unit='KiB'>65536</memory> <currentMemory unit='KiB'>65536</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> </os> <idmap> <uid start='1258512' target='0' count='65536'/> <gid start='1258512' target='0' count='65536'/> </idmap> <features> <capabilities policy='allow'> </capabilities> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/lib/libvirt/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/home/lxcuser/.local/share/lxc/test_deb/rootfs'/> <target dir='/'/> </filesystem> <interface type='bridge'> <mac address='00:16:3e:ab:21:1b'/> <source bridge='br0'/> <link state='up'/> </interface> </devices> </domain> Now attempt to define by virsh gives this err: lxcuser@blade1:~/.local/share/lxc/test_deb$ virsh -c lxc:/// define tmp/test _deb.xml error: Failed to define domain from /tmp/test_deb.xml error: unsupported configuration: You must map the root user of container Debian stretch. Where am I wrong ?

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