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load monitoring differences
by Marc 22 Oct '21

22 Oct '21

I was wondering if it is normal that the load reported from within the guest differs a lot from the guest load monitored on the host? Eg. currently I have guest that reports a load of 12-17 (uptime) while on the host top shows 70% cpu usage, I would expect this to be also around 12-17%.

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load monitoring differences
by Marc 22 Oct '21

22 Oct '21

I was wondering if it is normal that the load reported from within the guest differs a lot from the guest load monitored on the host? Eg. currently I have guest that reports a load of 12-17 (uptime) while on the host top shows 70% cpu usage, I would expect this to be also around 12-17%.

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is there a way to stop a domain in 'D' process state (uninterruptible) ?
by Lentes, Bernd 21 Oct '21

21 Oct '21

Hi, how can i stop/shutdown a domain which is in process state 'D' ? 'D' means uninterruptible and a process in 'D' can't be terminated by kill, even not with kill -9. Bernd -- Bernd Lentes System Administrator Institute for Metabolism and Cell Death (MCD) Building 25 - office 122 HelmholtzZentrum München bernd.lentes(a)helmholtz-muenchen.de phone: +49 89 3187 1241 phone: +49 89 3187 3827 fax: +49 89 3187 2294 http://www.helmholtz-muenchen.de/mcd Public key: 30 82 01 0a 02 82 01 01 00 b3 72 3e ce 2c 0a 6f 58 49 2c 92 23 c7 b9 c1 ff 6c 3a 53 be f7 9e e9 24 b7 49 fa 3c e8 de 28 85 2c d3 ed f7 70 03 3f 4d 82 fc cc 96 4f 18 27 1f df 25 b3 13 00 db 4b 1d ec 7f 1b cf f9 cd e8 5b 1f 11 b3 a7 48 f8 c8 37 ed 41 ff 18 9f d7 83 51 a9 bd 86 c2 32 b3 d6 2d 77 ff 32 83 92 67 9e ae ae 9c 99 ce 42 27 6f bf d8 c2 a1 54 fd 2b 6b 12 65 0e 8a 79 56 be 53 89 70 51 02 6a eb 76 b8 92 25 2d 88 aa 57 08 42 ef 57 fb fe 00 71 8e 90 ef b2 e3 22 f3 34 4f 7b f1 c4 b1 7c 2f 1d 6f bd c8 a6 a1 1f 25 f3 e4 4b 6a 23 d3 d2 fa 27 ae 97 80 a3 f0 5a c4 50 4a 45 e3 45 4d 82 9f 8b 87 90 d0 f9 92 2d a7 d2 67 53 e6 ae 1e 72 3e e9 e0 c9 d3 1c 23 e0 75 78 4a 45 60 94 f8 e3 03 0b 09 85 08 d0 6c f3 ff ce fa 50 25 d9 da 81 7b 2a dc 9e 28 8b 83 04 b4 0a 9f 37 b8 ac 58 f1 38 43 0e 72 af 02 03 01 00 01

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Re: about pcie-hot-plug on aarch64
by Andrea Bolognani 20 Oct '21

20 Oct '21

Forwarding to libvirt-users for visibility. On Wed, Oct 20, 2021 at 03:51:10PM +0800, Jaze Lee wrote: > For someone who meets the same problem. > > I upgrade stein to w, use one centos stream 8 vm as ctrl, and one > centos stream 8 server as cn, > then test it. There is no problem with attaching disks. All disks are > attached correctly. > But we do not know what's the problem with stein. If someone meets the > problem, you can update your openstack. > > Jaze Lee <jazeltq(a)gmail.com> 于2021年10月12日周二上午9:20写道： > > Andrea Bolognani <abologna(a)redhat.com> 于2021年10月12日周二上午12:07写道： > > > On Fri, Oct 08, 2021 at 04:54:37PM +0800, Jaze Lee wrote: > > > > Hello, > > > > We run Openstack Stein on arm. It runs nova-compute(use libvirt > > > > as virt driver) on arm host. We found when built with disks (use ceph > > > > rbd) on arm hosts, the vm can not attach all disk correctly. For > > > > example, built with six disks, the vm may attach three disks. No > > > > obvious error can be fond in nova-compute, libvirt. We compare aarch64 > > > > and x86, find when detach disk, the dmesg of the vm's os is different. > > > > May be the pciehg parameter is different? > > > > > > > > Did anyone met the problem? Or some suggestions? > > > > > > I think you might have just ran out of PCI ports available for > > > hotplug. Please try setting > > > > > > https://docs.openstack.org/nova/stein/configuration/config.html#libvirt.num… > > > > > > to a reasonable value and see whether that helps. > > > > Thanks. > > I already set the value to a reasonable value. It is 15 in our environment. > > If the value is not set correctly, the nova-compute will complain no > > available slot for pci device. > > But it is not the case I talked about here. -- Andrea Bolognani / Red Hat / Virtualization

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VM paused during multipath iSCSI reservation
by Vojtech Juranek 14 Oct '21

14 Oct '21

Hi, I'm trying to find the root cause for BZ #1898049 [1]. When setting up Windows HA cluster on Windows Server VMs run on top of oVirt, Windows cluster validator runs couple of tests and fails during test "Validate SCSI-3 Persistent Reservation" and one of the VMs of the cluster is paused with IO error. Disk definition is as follows: <disk type='block' device='lun' sgio='unfiltered' snapshot='no'> <driver name='qemu' type='raw' cache='none' error_policy='stop' io='native'/> <source dev='/dev/mapper/3600a09803830447a4f244c4657616f6f' index='1'> <seclabel model='dac' relabel='no'/> <reservations managed='yes'> <source type='unix' path='/var/lib/libvirt/qemu/domain-1-Windows-2016-2/pr-helper0.sock' mode='client'/> </reservations> </source> <backingStore/> <target dev='sdb' bus='scsi'/> <shareable/> <alias name='ua-26b4975e-e1d4-4e27-b2c6-2ea0894a571b'/> <address type='drive' controller='0' bus='0' target='0' unit='1'/> </disk> and libvirt error I get is bellow [2]. When I try to create reservation from Windows VM manually, I get following error (but not sure I do it whole process correctly): .\sg_persist --out --register --param-sark=123abc e: QEMU QEMU HARDDISK 2.5+ Peripheral device type: disk PR out (Register): command not supported sg_persist failed: Illegal request, Invalid opcode Do you have any ideas what could be wrong or how to determine the root cause of this this issue? Thanks in advance. Vojta [1] https://bugzilla.redhat.com/1898049 [2] libvirt debug log: 2021-10-12 11:43:25.148+0000: 2006427: debug : qemuMonitorEmitIOError:1243 : mon=0x7fb02006a020 2021-10-12 11:43:25.148+0000: 2006427: info : virObjectRef:402 : OBJECT_REF: obj=0x7fb02006a020 2021-10-12 11:43:25.148+0000: 2006427: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd0130020 2021-10-12 11:43:25.148+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd010d340 2021-10-12 11:43:25.148+0000: 2006427: info : virObjectNew:258 : OBJECT_NEW: obj=0x7fb020082590 classname=virDomainEventIOError 2021-10-12 11:43:25.148+0000: 2000208: info : vir_object_finalize:321 : OBJECT_DISPOSE: obj=0x7fb020082500 2021-10-12 11:43:25.148+0000: 2006427: info : virObjectNew:258 : OBJECT_NEW: obj=0x7fb020082620 classname=virDomainEventIOError 2021-10-12 11:43:25.148+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb020082500 2021-10-12 11:43:25.148+0000: 2006427: debug : qemuProcessHandleIOError:907 : Transitioned guest Windows-2016-2 to paused state due to IO error 2021-10-12 11:43:25.148+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fafd010d340 2021-10-12 11:43:25.148+0000: 2006427: info : virObjectNew:258 : OBJECT_NEW: obj=0x7fafbc1fb8c0 classname=virDomainEventLifecycle 2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockProcessPause:204 : plugin=0x7fafd01272a0 dom=0x7fb01400f5e0 state=0x7fb02401d768 2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockManagerNew:134 : plugin=0x7fafd01272a0 dom=0x7fb01400f5e0 withResources=1 2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerPluginGetDriver:276 : plugin=0x7fafd01272a0 2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerNew:300 : driver=0x7fafd444a000 type=0 nparams=5 params=0x7fafd77de640 flags=0x0 2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:97 : key=uuid type=uuid value=70eee88c-ba2c-4c6c-bd51-c2b663db27f8 2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:90 : key=name type=string value=Windows-2016-2 2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:78 : key=id type=uint value=1 2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:78 : key=pid type=uint value=2006418 2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:93 : key=uri type=cstring value=(null) 2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockManagerNew:146 : Adding leases 2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockManagerNew:151 : Adding disks 2021-10-12 11:43:25.149+0000: 2006427: debug : virDomainLockManagerAddImage:90 : Add disk /rhev/data-center/mnt/blockSD/7c4f09b6-9e87-436f-bda9-22d1f0b50955/images/f5d6e074-dfe9-462d-8cfd-3e14b0eb5aea/766e36b2-84a6-43e7-a48b-a5f47e669860 2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerAddResource:326 : lock=0x7fafbc19e250 type=0 name=/rhev/data-center/mnt/blockSD/7c4f09b6-9e87-436f-bda9-22d1f0b50955/images/f5d6e074-dfe9-462d-8cfd-3e14b0eb5aea/766e36b2-84a6-43e7-a48b-a5f47e669860 nparams=0 params=(nil) flags=0x0 2021-10-12 11:43:25.149+0000: 2006427: debug : virDomainLockManagerAddImage:90 : Add disk /dev/mapper/3600a09803830447a4f244c4657616f6f 2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerAddResource:326 : lock=0x7fafbc19e250 type=0 name=/dev/mapper/3600a09803830447a4f244c4657616f6f nparams=0 params=(nil) flags=0x2 2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerRelease:359 : lock=0x7fafbc19e250 state=0x7fb02401d768 flags=0x0 2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerFree:381 : lock=0x7fafbc19e250 2021-10-12 11:43:25.149+0000: 2006427: debug : qemuProcessHandleIOError:920 : Preserving lock state '<null>' 2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fafd0130020 2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb02006a020 2021-10-12 11:43:25.150+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd010d340 2021-10-12 11:43:25.150+0000: 2000208: info : vir_object_finalize:321 : OBJECT_DISPOSE: obj=0x7fb020082590 2021-10-12 11:43:25.150+0000: 2006427: info : virObjectRef:402 : OBJECT_REF: obj=0x7fb02006a020 2021-10-12 11:43:25.150+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb020082590 2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb02006a020 2021-10-12 11:43:25.150+0000: 2000208: info : virObjectNew:258 : OBJECT_NEW: obj=0x564a89a4cc60 classname=virDomain 2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb02006a020 2021-10-12 11:43:25.150+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd0018ca0 2021-10-12 11:43:25.150+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x564a89978df0 2021-10-12 11:43:25.150+0000: 2000208: debug : virAccessManagerCheckDomain:238 : manager=0x564a89978df0(name=stack) driver=QEMU domain=0x7ffd2c677010 perm=0 2021-10-12 11:43:25.150+0000: 2000208: debug : virAccessManagerCheckDomain:238 : manager=0x564a89978e50(name=none) driver=QEMU domain=0x7ffd2c677010 perm=0 2021-10-12 11:43:25.150+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x564a89978df0 2021-10-12 11:43:25.150+0000: 2000208: debug : remoteRelayDomainEventIOErrorReason:529 : Relaying domain io error Windows-2016-2 1 /dev/mapper/3600a09803830447a4f244c4657616f6f ua-26b4975e-e1d4-4e27-b2c6-2ea0894a571b 1 , callback 3

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could not find capabilities for arch=x86_64 domaintype=kvm
by shafnamol N 13 Oct '21

13 Oct '21

Hi, I am new to Libvirt and Qemu.I have installed Libvirt 6.10 and qemu-kvm 4.2.0 on CentOS8. I configured and built libvirt based on instructions from https://libvirt.org/compiling.html. But when i tried to create a VM using virsh it shows the following error: *# virsh create /home/abc.xml* *error: Failed to create domain from /home/abc.xmlerror: invalid argument: could not find capabilities for arch=x86_64 domaintype=kvm * When i check the hypervisor capabilities ,it doest show qemu in guest domain type. # virsh capabilities As per the reply from this mailing-list i passed an option while building the libvirt. ie., *meson build -Dsystem=true* It worked for me. But Now, i tried to migrate my work on a new machine with same os and same version as above. As part of,I configured and built libvirt.Also passed *meson build -Dsystem=true *while building libvirt. After installation I tried with *# virsh create /home/abc.xml* It results in the same error shown below. *error: Failed to create domain from /home/abc.xmlerror: invalid argument: could not find capabilities for arch=x86_64 domaintype=kvm * I stuck here. Thanks for the help in advance. Shafnamol.N

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about pcie-hot-plug on aarch64
by Jaze Lee 11 Oct '21

11 Oct '21

Hello, We run Openstack Stein on arm. It runs nova-compute(use libvirt as virt driver) on arm host. We found when built with disks (use ceph rbd) on arm hosts, the vm can not attach all disk correctly. For example, built with six disks, the vm may attach three disks. No obvious error can be fond in nova-compute, libvirt. We compare aarch64 and x86, find when detach disk, the dmesg of the vm's os is different. May be the pciehg parameter is different? Did anyone met the problem? Or some suggestions? x86: Nothing at all aarch64: Sep 29 15:28:55 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Attention button pressed Sep 29 15:28:55 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Powering off due to button press Sep 29 15:29:00 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Attention button pressed Sep 29 15:29:00 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Button cancel Sep 29 15:29:00 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Action canceled due to button press Sep 29 15:29:07 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Attention button pressed Sep 29 15:29:07 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Powering off due to button press Sep 29 15:29:13 * kernel: pciehp 0000:00:01.5:pcie004: Slot(0-5): Link Up Sep 29 15:29:16 * kernel: pciehp 0000:00:01.5:pcie004: Failed to check link status Sep 29 15:29:18 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Attention button pressed Sep 29 15:29:18 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Powering off due to button press Sep 29 15:29:23 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Attention button pressed Sep 29 15:29:23 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Button cancel Sep 29 15:29:23 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Action canceled due to button press Sep 29 15:29:30 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Attention button pressed Sep 29 15:29:30 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Powering off due to button press Sep 29 15:29:36 * kernel: pciehp 0000:00:01.6:pcie004: Slot(0-6): Link Up Sep 29 15:29:39 * kernel: pciehp 0000:00:01.6:pcie004: Failed to check link status Sep 29 15:29:39 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Attention button pressed Sep 29 15:29:39 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Powering off due to button press Sep 29 15:29:45 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Attention button pressed Sep 29 15:29:45 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Button cancel Sep 29 15:29:45 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Action canceled due to button press Sep 29 15:29:52 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Attention button pressed Sep 29 15:29:52 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Powering off due to button press Sep 29 15:29:58 * kernel: pciehp 0000:00:01.7:pcie004: Slot(0-7): Link Up Sep 29 15:30:01 * kernel: pciehp 0000:00:02.0:pcie004: Slot(0-8): Attention button pressed Sep 29 15:30:01 * kernel: pciehp 0000:00:02.0:pcie004: Slot(0-8): Powering off due to button press

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re: nwfilter direction not being used when protocol all
by Jason Pyeron 11 Oct '21

11 Oct '21

> -----Original Message----- > From: Jason Pyeron > Sent: Monday, October 11, 2021 8:49 AM > To: Kyle Marek; Michael Watson Jr > Cc: libvirt-users > > Watson / Kyle: > > (note I coped the list) > > While I read https://libvirt.org/formatnwfilter.html#nwfelemsRulesProtoMisc , it is not > clear that it is intended to add the iptables action without regard to the rule’s > direction. > > Take the following rule scenarios: > > <rule action='accept' direction='in' priority='500' statematch='false'> > <tcp dstportstart='22'/> > </rule> > <rule action='drop' direction='in' priority='1000'> > <all/> > </rule> > > # iptables-save | grep vnet5 | tee in > :FI-vnet5 - [0:0] > :FO-vnet5 - [0:0] > :HI-vnet5 - [0:0] > -A FI-vnet5 -p tcp -m tcp --sport 22 -j RETURN > -A FI-vnet5 -j DROP > -A FO-vnet5 -p tcp -m tcp --dport 22 -j ACCEPT > -A FO-vnet5 -j DROP > -A HI-vnet5 -p tcp -m tcp --sport 22 -j RETURN > -A HI-vnet5 -j DROP > -A libvirt-host-in -m physdev --physdev-in vnet5 -g HI-vnet5 > -A libvirt-in -m physdev --physdev-in vnet5 -g FI-vnet5 > -A libvirt-in-post -m physdev --physdev-in vnet5 -j ACCEPT > -A libvirt-out -m physdev --physdev-out vnet5 --physdev-is-bridged -g FO-vnet5 > > <rule action='accept' direction='in' priority='500' statematch='false'> > <tcp dstportstart='22'/> > </rule> > <rule action='drop' direction='out' priority='1000'> > <all/> > </rule> > > # iptables-save | grep vnet5 | tee out > :FI-vnet5 - [0:0] > :FO-vnet5 - [0:0] > :HI-vnet5 - [0:0] > -A FI-vnet5 -p tcp -m tcp --sport 22 -j RETURN > -A FI-vnet5 -j DROP > -A FO-vnet5 -p tcp -m tcp --dport 22 -j ACCEPT > -A FO-vnet5 -j DROP > -A HI-vnet5 -p tcp -m tcp --sport 22 -j RETURN > -A HI-vnet5 -j DROP > -A libvirt-host-in -m physdev --physdev-in vnet5 -g HI-vnet5 > -A libvirt-in -m physdev --physdev-in vnet5 -g FI-vnet5 > -A libvirt-in-post -m physdev --physdev-in vnet5 -j ACCEPT > -A libvirt-out -m physdev --physdev-out vnet5 --physdev-is-bridged -g FO-vnet5 > > <rule action='accept' direction='in' priority='500' statematch='false'> > <tcp dstportstart='22'/> > </rule> > <rule action='drop' direction='inout' priority='1000'> > <all/> > </rule> > > # iptables-save | grep vnet5 | tee inout > :FI-vnet5 - [0:0] > :FO-vnet5 - [0:0] > :HI-vnet5 - [0:0] > -A FI-vnet5 -p tcp -m tcp --sport 22 -j RETURN > -A FI-vnet5 -j DROP > -A FO-vnet5 -p tcp -m tcp --dport 22 -j ACCEPT > -A FO-vnet5 -j DROP > -A HI-vnet5 -p tcp -m tcp --sport 22 -j RETURN > -A HI-vnet5 -j DROP > -A libvirt-host-in -m physdev --physdev-in vnet5 -g HI-vnet5 > -A libvirt-in -m physdev --physdev-in vnet5 -g FI-vnet5 > -A libvirt-in-post -m physdev --physdev-in vnet5 -j ACCEPT > -A libvirt-out -m physdev --physdev-out vnet5 --physdev-is-bridged -g FO-vnet5 > > We note that the > > -A HI-vnet5 -j DROP > -A FI-vnet5 -j DROP > -A FO-vnet5 -j DROP > > Is present without regards to the state of the direction attribute on the “default” drop > rule. > > If the direction is “in” then the “-A FI-vnet5 -j DROP” should not exists. > > What does the source code say? I worry that either the docs are imprecise and this is > desired, or there is a bug and I can end up like After looking at libvirt-4.5.0/src/nwfilter/nwfilter_ebiptables_driver.c's _iptablesCreateRuleInstance and iptablesCreateRuleInstanceStateCtrl, I saw the if statements like the below. 1598 if (directionIn && !inout) { 1599 if ((rule->flags & IPTABLES_STATE_FLAGS)) 1600 create = false; 1601 } 1629 if (!directionIn) { 1630 if ((rule->flags & IPTABLES_STATE_FLAGS)) 1631 create = false; 1632 } Is the only way to respect the direction is to have <all state='something...'/> ? If that is the case the docs, really need an update to note this. For others, my deny inbound, allow outbound was accomplished by: <rule action='accept' direction='in' priority='999'> <all state='ESTABLISHED,RELATED'/> </rule> <rule action='drop' direction='in' priority='1000'> <all state='NONE'/> </rule> -Jason

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nwfilter direction not being used when protocol all
by Jason Pyeron 11 Oct '21

11 Oct '21

Watson / Kyle: (note I coped the list) While I read https://libvirt.org/formatnwfilter.html#nwfelemsRulesProtoMisc , it is not clear that it is intended to add the iptables action without regard to the rule’s direction. Take the following rule scenarios: <rule action='accept' direction='in' priority='500' statematch='false'> <tcp dstportstart='22'/> </rule> <rule action='drop' direction='in' priority='1000'> <all/> </rule> # iptables-save | grep vnet5 | tee in :FI-vnet5 - [0:0] :FO-vnet5 - [0:0] :HI-vnet5 - [0:0] -A FI-vnet5 -p tcp -m tcp --sport 22 -j RETURN -A FI-vnet5 -j DROP -A FO-vnet5 -p tcp -m tcp --dport 22 -j ACCEPT -A FO-vnet5 -j DROP -A HI-vnet5 -p tcp -m tcp --sport 22 -j RETURN -A HI-vnet5 -j DROP -A libvirt-host-in -m physdev --physdev-in vnet5 -g HI-vnet5 -A libvirt-in -m physdev --physdev-in vnet5 -g FI-vnet5 -A libvirt-in-post -m physdev --physdev-in vnet5 -j ACCEPT -A libvirt-out -m physdev --physdev-out vnet5 --physdev-is-bridged -g FO-vnet5 <rule action='accept' direction='in' priority='500' statematch='false'> <tcp dstportstart='22'/> </rule> <rule action='drop' direction='out' priority='1000'> <all/> </rule> # iptables-save | grep vnet5 | tee out :FI-vnet5 - [0:0] :FO-vnet5 - [0:0] :HI-vnet5 - [0:0] -A FI-vnet5 -p tcp -m tcp --sport 22 -j RETURN -A FI-vnet5 -j DROP -A FO-vnet5 -p tcp -m tcp --dport 22 -j ACCEPT -A FO-vnet5 -j DROP -A HI-vnet5 -p tcp -m tcp --sport 22 -j RETURN -A HI-vnet5 -j DROP -A libvirt-host-in -m physdev --physdev-in vnet5 -g HI-vnet5 -A libvirt-in -m physdev --physdev-in vnet5 -g FI-vnet5 -A libvirt-in-post -m physdev --physdev-in vnet5 -j ACCEPT -A libvirt-out -m physdev --physdev-out vnet5 --physdev-is-bridged -g FO-vnet5 <rule action='accept' direction='in' priority='500' statematch='false'> <tcp dstportstart='22'/> </rule> <rule action='drop' direction='inout' priority='1000'> <all/> </rule> # iptables-save | grep vnet5 | tee inout :FI-vnet5 - [0:0] :FO-vnet5 - [0:0] :HI-vnet5 - [0:0] -A FI-vnet5 -p tcp -m tcp --sport 22 -j RETURN -A FI-vnet5 -j DROP -A FO-vnet5 -p tcp -m tcp --dport 22 -j ACCEPT -A FO-vnet5 -j DROP -A HI-vnet5 -p tcp -m tcp --sport 22 -j RETURN -A HI-vnet5 -j DROP -A libvirt-host-in -m physdev --physdev-in vnet5 -g HI-vnet5 -A libvirt-in -m physdev --physdev-in vnet5 -g FI-vnet5 -A libvirt-in-post -m physdev --physdev-in vnet5 -j ACCEPT -A libvirt-out -m physdev --physdev-out vnet5 --physdev-is-bridged -g FO-vnet5 We note that the -A HI-vnet5 -j DROP -A FI-vnet5 -j DROP -A FO-vnet5 -j DROP Is present without regards to the state of the direction attribute on the “default” drop rule. If the direction is “in” then the “-A FI-vnet5 -j DROP” should not exists. What does the source code say? I worry that either the docs are imprecise and this is desired, or there is a bug and I can end up like https://superuser.com/questions/1660080/in-libvirt-network-filters-nwfilter… As this is going to be a generic rule, applied many times – I would prefer not to have mac based source allow rules. -Jason

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how to get enabled features
by Jiatong Shen 11 Oct '21

11 Oct '21

Hello community, I am trying to learn how to use dtrace and systemtap for libvirt, as the documentation says it seems to enable `--with-dtrace` when compiling. I am installing libvirt using apt install and is it possible to determine if dtrace is built by running some libvirt commands? Thank you. -- Best Regards, Jiatong Shen

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