XO spawned VM from template has wrong VIF network order
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olivierlambert
I have recreated the base VM [debian11-template], convert it to template and generated net VM [zzz-nettest2] based on that template.
These are the differences in VIF config:original VM:
uuid ( RO) : 84c4bd3e-4f50-48dc-4050-19dd4e8a8a8a vm-name-label ( RO): Debian11-template **device ( RO): 0** MAC ( RO): 9e:82:ec:4e:53:4f network-uuid ( RO): 1f7bec14-2ff5-471d-ba9c-bd84882ede17 **network-name-label ( RO): Net1** uuid ( RO) : 1d0aca18-e4f2-8b08-9ae6-022846241ab1 vm-name-label ( RO): Debian11-template **device ( RO): 1** MAC ( RO): 02:76:1f:22:c0:be network-uuid ( RO): 79fd2cb6-762a-e433-129a-edbb32612735 **network-name-label ( RO): Net2**new VM
uuid ( RO) : f4e200d6-2ba4-d2a4-961e-a0431951d25a vm-name-label ( RO): zzz-nettest2 **device ( RO): 1** MAC ( RO): 6e:18:1e:93:38:e9 network-uuid ( RO): 1f7bec14-2ff5-471d-ba9c-bd84882ede17 **network-name-label ( RO): Net1** uuid ( RO) : 16fbbd49-bb80-d111-dc83-5c47447ac174 vm-name-label ( RO): zzz-nettest2 **device ( RO): 0** MAC ( RO): a2:fe:cd:37:58:9f network-uuid ( RO): 79fd2cb6-762a-e433-129a-edbb32612735 **network-name-label ( RO): Net2**It happens no matter if I convert the template from the VM or create it from snapshot.
Template details below:
uuid ( RO) : f5b33b1c-798c-7f01-3ad6-9f5a44d1a25e name-label ( RW): Debian11-template name-description ( RW): [<env>/<DC>] <application/infra>: <app name/infra role> user-version ( RW): 1 is-a-template ( RW): true is-default-template ( RW): false is-a-snapshot ( RO): false snapshot-of ( RO): <not in database> snapshots ( RO): snapshot-time ( RO): 19700101T00:00:00Z snapshot-info ( RO): parent ( RO): <not in database> children ( RO): is-control-domain ( RO): false power-state ( RO): halted memory-actual ( RO): <not in database> memory-target ( RO): 0 memory-overhead ( RO): 19922944 memory-static-max ( RW): 2147483648 memory-dynamic-max ( RW): 2147483648 memory-dynamic-min ( RW): 2147483648 memory-static-min ( RW): 268435456 suspend-VDI-uuid ( RW): <not in database> suspend-SR-uuid ( RW): <not in database> VCPUs-params (MRW): VCPUs-max ( RW): 1 VCPUs-at-startup ( RW): 1 actions-after-shutdown ( RW): Destroy actions-after-reboot ( RW): Restart actions-after-crash ( RW): Restart console-uuids (SRO): hvm ( RO): false platform (MRW): timeoffset: 1; secureboot: false; device-model: qemu-upstream-compat; videoram: 8; hpet: true; apic: true; device_id: 0001; vga: std; nx: true; pae: true; viridian: false; acpi: 1 allowed-operations (SRO): changing_NVRAM; changing_dynamic_range; changing_shadow_memory; changing_static_range; migrate_send; provision; destroy; export; clone; copy current-operations (SRO): blocked-operations (MRW): allowed-VBD-devices (SRO): 1; 2; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 50; 51; 52; 53; 54; 55; 56; 57; 58; 59; 60; 61; 62; 63; 64; 65; 66; 67; 68; 69; 70; 71; 72; 73; 74; 75; 76; 77; 78; 79; 80; 81; 82; 83; 84; 85; 86; 87; 88; 89; 90; 91; 92; 93; 94; 95; 96; 97; 98; 99; 100; 101; 102; 103; 104; 105; 106; 107; 108; 109; 110; 111; 112; 113; 114; 115; 116; 117; 118; 119; 120; 121; 122; 123; 124; 125; 126; 127; 128; 129; 130; 131; 132; 133; 134; 135; 136; 137; 138; 139; 140; 141; 142; 143; 144; 145; 146; 147; 148; 149; 150; 151; 152; 153; 154; 155; 156; 157; 158; 159; 160; 161; 162; 163; 164; 165; 166; 167; 168; 169; 170; 171; 172; 173; 174; 175; 176; 177; 178; 179; 180; 181; 182; 183; 184; 185; 186; 187; 188; 189; 190; 191; 192; 193; 194; 195; 196; 197; 198; 199; 200; 201; 202; 203; 204; 205; 206; 207; 208; 209; 210; 211; 212; 213; 214; 215; 216; 217; 218; 219; 220; 221; 222; 223; 224; 225; 226; 227; 228; 229; 230; 231; 232; 233; 234; 235; 236; 237; 238; 239; 240; 241; 242; 243; 244; 245; 246; 247; 248; 249; 250; 251; 252; 253; 254 allowed-VIF-devices (SRO): 2; 3; 4; 5; 6 possible-hosts ( RO): 9a33c146-c64d-4933-a54a-18941cb825f0 domain-type ( RW): hvm current-domain-type ( RO): <not in database> HVM-boot-policy ( RW): BIOS order HVM-boot-params (MRW): firmware: bios; order: cdn HVM-shadow-multiplier ( RW): 1.000 PV-kernel ( RW): PV-ramdisk ( RW): PV-args ( RW): PV-legacy-args ( RW): PV-bootloader ( RW): PV-bootloader-args ( RW): last-boot-CPU-flags ( RO): vendor: GenuineIntel; features: 1fcbfbff-f7fa3223-2d93fbff-00000523-0000000f-019c47ab-00000008-00000000-00001000-9c000400-00000000-00000000-00000000-00000000-00000000 last-boot-record ( RO): '' resident-on ( RO): <not in database> affinity ( RW): <not in database> other-config (MRW): import_task: OpaqueRef:eccf2505-7aaf-4592-b9b0-9887cfa77b33; mac_seed: 1c02ad94-8a62-f861-eabd-0baf9b7c32d4; base_template_name: Debian Stretch 9.0; install-methods: cdrom,nfs,http,ftp; linux_template: true dom-id ( RO): -1 recommendations ( RO): <restrictions><restriction field="memory-static-max" max="1649267441664"/><restriction field="vcpus-max" max="32"/><restriction field="has-vendor-device" value="false"/><restriction field="allow-gpu-passthrough" value="1"/><restriction field="allow-vgpu" value="1"/><restriction field="allow-network-sriov" value="1"/><restriction field="supports-bios" value="yes"/><restriction field="supports-uefi" value="no"/><restriction field="supports-secure-boot" value="no"/><restriction max="255" property="number-of-vbds"/><restriction max="7" property="number-of-vifs"/></restrictions> xenstore-data (MRW): vm-data: ; vm-data/mmio-hole-size: 268435456 ha-always-run ( RW) [DEPRECATED]: false ha-restart-priority ( RW): blobs ( RO): start-time ( RO): <unknown time> install-time ( RO): <unknown time> VCPUs-number ( RO): <not in database> VCPUs-utilisation (MRO): os-version (MRO): PV-drivers-version (MRO): PV-drivers-up-to-date ( RO) [DEPRECATED]: false memory (MRO): disks (MRO): VBDs (SRO): fd0f2074-c6e8-b505-b5dc-95ac02fc4e42; 0bc0c5cd-afb5-54f3-8a48-815539029c4c networks (MRO): PV-drivers-detected ( RO): false other (MRO): platform-feature-multiprocessor-suspend: 1; has-vendor-device: 0 live ( RO): true guest-metrics-last-updated ( RO): 20220711T14:23:59Z can-use-hotplug-vbd ( RO): unspecified can-use-hotplug-vif ( RO): unspecified cooperative ( RO) [DEPRECATED]: true tags (SRW): appliance ( RW): <not in database> snapshot-schedule ( RW): <not in database> is-vmss-snapshot ( RO): false start-delay ( RW): 0 shutdown-delay ( RW): 0 order ( RW): 0 version ( RO): 0 generation-id ( RO): hardware-platform-version ( RO): 0 has-vendor-device ( RW): false requires-reboot ( RO): false reference-label ( RO): debian-9 bios-strings (MRO): bios-vendor: Xen; bios-version: ; system-manufacturer: Xen; system-product-name: HVM domU; system-version: ; system-serial-number: ; enclosure-asset-tag: ; hp-rombios: ; oem-1: Xen; oem-2: MS_VM_CERT/SHA1/d43fa6d3fe8aaef04c2bad9d3e3daaef04c2bad9d3 -
olivierlambert - any ideas?
Thanks
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olivierlambert - any ideas as I ran out of options.
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Sorry I'm ultra busy at the moment and just getting out of COVID. Hopefully, someone else in the community can help you
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mietek Might need to change the NIC order? Should be possible in a similar way in XCP-ng as in XenServer; see for example: https://support.citrix.com/article/CTX135809/how-to-change-order-of-nics-in-xenserver
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olivierlambert
Thanks for the info and get well soon! -
tjkreidl Thanks for the article. Unfortunately this machine is full of running VMs and changing NICs order on the host might have a global impact on all of them so it seems like an overkill.
I have created this template on this machine and created VM based on that template right away and I experience this issue. It looks like there is a problem with the template creation or template based VM creation process.
Is there a way to change it NIC order in the template itself? -
mietek As to changing the NIC order in a template, not as far as I know. That is a host/pool configuration setting.
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tjkreidl This is surprising then that VM spawned from the template would even be able to change NIC order. This make no sense.
On the other hand how does the template know what is the list on NICs attached to the VM created from it and what should be the order of them then? -
mietek Depends on the VIF that the VM had in the template, I would imagine. Easy enough to change once you have your new VM. Worst case, create a new template.
I have seen NICs randomly change order on hosts in the past - scary stuff! -
tjkreidl This is what I am trying to figure it out. There has to be a reason and there has to be a solution to it. Any other tips or ideas?
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tjkreidl said in XO spawned VM from template has wrong VIF network order:
I have seen NICs randomly change order on hosts in the past - scary stuff!
This is why Linux switched from
eth0naming to names likeenp5s0etc. https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/ -
Forza Hey - thanks for the input. It would be valid if I would reboot xcp host though. All this is happening on live xcp server which is problematic.
It's no the end of the world but there has to be a way to debug it.
Any tips on that?
