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Date: Thu, 29 Jun 2023 12:18:30 +0200
From: Natanael Copa <ncopa@alpinelinux.org>
To: Jibun no Kage <jibunnokage@gmail.com>
Cc: ~alpine/users@lists.alpinelinux.org
Subject: Re: Alpine 3.18 in aarch64 QEMU/KVM VM, has ethernet interface, but
 no communication results?
Message-ID: <20230629121830.4065b262@ncopa-desktop.lan>
In-Reply-To: <CAAvhbGifMX-T1+k9qA6BiTkuaTAEYShMPwUVenkPxVjHDiiPOQ@mail.gmail.com>
References: <CAAvhbGifMX-T1+k9qA6BiTkuaTAEYShMPwUVenkPxVjHDiiPOQ@mail.gmail.com>
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On Wed, 28 Jun 2023 17:38:53 -0700
Jibun no Kage <jibunnokage@gmail.com> wrote:

> Alpine 3.18 in aarch64 QEMU/KVM VM, has ethernet interface, but no
> communication results?  The eth0 interface exists, I can ping it if I
> assign a static IP address via /etc/network/interfaces.  And the route
> table has a default gateway as expected.  But no communication results?
> 
> On the same aarch64 system, VMs running say Debian 11, Debian 12, and
> Ubuntu 22.04 Jammy Jelly fish work as expected, in reference to network
> communication.  So I believe I have QEM/KVM installed correctly, I happen
> to be using a bridge interface to the physical NIC on the SBC that is
> aarch64 based.  The SBC is an IndieDroid Nova.
> 
> Any help is greatly appreciated.  Detail information...
> 
> Core OS...
> # cat /etc/os-release
> PRETTY_NAME="Armbian 23.05.0-trunk jammy"
> NAME="Ubuntu"
> VERSION_ID="22.04"
> VERSION="22.04.2 LTS (Jammy Jellyfish)"
> VERSION_CODENAME=jammy
> ID=ubuntu
> ID_LIKE=debian
> HOME_URL="https://www.ubuntu.com/"
> SUPPORT_URL="https://help.ubuntu.com/"
> BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
> PRIVACY_POLICY_URL="
> https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
> UBUNTU_CODENAME=jammy
> 
> # uname -a
> Linux indiedroid-nova 5.10.110-rockchip-rk3588-indiedroid #1 SMP PREEMPT
> Thu Mar 9 02:22:35 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux
> 
> QEMU/KVM
> # /usr/bin/qemu-system-aarch64 --version
> QEMU emulator version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.11)
> Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
> # kvm --version
> QEMU emulator version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.11)
> Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
> 
> # brctl show
> bridge name     bridge id               STP enabled     interfaces
> br0             8000.42c8c028b51b       no              enP4p65s0
>                                                         vnet5

What ip address has br0?

Can you ping 192.168.1.2 from the host?

Would it be possibele that there are other hosts that has the address
192.168.1.211 (eg ip address conflict)?

Could it be other machines connected to br0 that has mac
address='52:54:00:62:b1:4b'?

Can you share the dumpxml from one of the working debian or ubuntu
machines?

> docker0         8000.024258701c19       no
> 
> # virsh list
>  Id   Name          State
> -----------------------------
>  6    Alpine-3.18   running
> 
> # virsh dumpxml Alpine-3.18
> <domain type='kvm' id='6'>
>   <name>Alpine-3.18</name>
>   <uuid>bbb0252d-062f-4e05-bb14-90f8355730aa</uuid>
>   <metadata>
>     <libosinfo:libosinfo xmlns:libosinfo="
> http://libosinfo.org/xmlns/libvirt/domain/1.0">  
>       <libosinfo:os id="http://alpinelinux.org/alpinelinux/3.18"/>
>     </libosinfo:libosinfo>
>   </metadata>
>   <memory unit='KiB'>1048576</memory>
>   <currentMemory unit='KiB'>1048576</currentMemory>
>   <vcpu placement='static'>1</vcpu>
>   <resource>
>     <partition>/machine</partition>
>   </resource>
>   <os>
>     <type arch='aarch64' machine='virt-6.2'>hvm</type>
>     <loader readonly='yes'
> type='pflash'>/usr/share/AAVMF/AAVMF_CODE.fd</loader>  
>     <nvram>/var/lib/libvirt/qemu/nvram/Alpine-3.18_VARS.fd</nvram>
>   </os>
>   <features>
>     <acpi/>
>     <gic version='3'/>
>   </features>
>   <cpu mode='host-passthrough' check='none'/>
>   <clock offset='utc'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>destroy</on_crash>
>   <devices>
>     <emulator>/usr/bin/qemu-system-aarch64</emulator>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/Alpine-3.18.qcow2' index='2'/>
>       <backingStore/>
>       <target dev='vda' bus='virtio'/>
>       <boot order='2'/>
>       <alias name='virtio-disk0'/>
>       <address type='pci' domain='0x0000' bus='0x05' slot='0x00'
> function='0x0'/>  
>     </disk>
>     <disk type='file' device='cdrom'>
>       <driver name='qemu' type='raw'/>
>       <source file='/home/ttt/Downloads/alpine-standard-3.18.2-aarch64.iso'
> index='1'/>  
>       <backingStore/>
>       <target dev='sda' bus='scsi'/>
>       <readonly/>
>       <boot order='1'/>
>       <alias name='scsi0-0-0-0'/>
>       <address type='drive' controller='0' bus='0' target='0' unit='0'/>
>     </disk>
>     <controller type='usb' index='0' model='qemu-xhci' ports='15'>
>       <alias name='usb'/>
>       <address type='pci' domain='0x0000' bus='0x02' slot='0x00'
> function='0x0'/>  
>     </controller>
>     <controller type='scsi' index='0' model='virtio-scsi'>
>       <alias name='scsi0'/>
>       <address type='pci' domain='0x0000' bus='0x03' slot='0x00'
> function='0x0'/>  
>     </controller>
>     <controller type='pci' index='0' model='pcie-root'>
>       <alias name='pcie.0'/>
>     </controller>
>     <controller type='pci' index='1' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='1' port='0x8'/>
>       <alias name='pci.1'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x0' multifunction='on'/>
>     </controller>
>     <controller type='pci' index='2' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='2' port='0x9'/>
>       <alias name='pci.2'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x1'/>  
>     </controller>
>     <controller type='pci' index='3' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='3' port='0xa'/>
>       <alias name='pci.3'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x2'/>  
>     </controller>
>     <controller type='pci' index='4' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='4' port='0xb'/>
>       <alias name='pci.4'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x3'/>  
>     </controller>
>     <controller type='pci' index='5' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='5' port='0xc'/>
>       <alias name='pci.5'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x4'/>  
>     </controller>
>     <controller type='pci' index='6' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='6' port='0xd'/>
>       <alias name='pci.6'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x5'/>  
>     </controller>
>     <controller type='pci' index='7' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='7' port='0xe'/>
>       <alias name='pci.7'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x6'/>  
>     </controller>
>     <controller type='pci' index='8' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='8' port='0xf'/>
>       <alias name='pci.8'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x7'/>  
>     </controller>
>     <controller type='pci' index='9' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='9' port='0x10'/>
>       <alias name='pci.9'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x0' multifunction='on'/>
>     </controller>
>     <controller type='pci' index='10' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='10' port='0x11'/>
>       <alias name='pci.10'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x1'/>  
>     </controller>
>     <controller type='pci' index='11' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='11' port='0x12'/>
>       <alias name='pci.11'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x2'/>  
>     </controller>
>     <controller type='pci' index='12' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='12' port='0x13'/>
>       <alias name='pci.12'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x3'/>  
>     </controller>
>     <controller type='pci' index='13' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='13' port='0x14'/>
>       <alias name='pci.13'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x4'/>  
>     </controller>
>     <controller type='pci' index='14' model='pcie-root-port'>
>       <model name='pcie-root-port'/>
>       <target chassis='14' port='0x15'/>
>       <alias name='pci.14'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x5'/>  
>     </controller>
>     <controller type='virtio-serial' index='0'>
>       <alias name='virtio-serial0'/>
>       <address type='pci' domain='0x0000' bus='0x04' slot='0x00'
> function='0x0'/>  
>     </controller>
>     <interface type='bridge'>
>       <mac address='52:54:00:62:b1:4b'/>
>       <source bridge='br0'/>
>       <target dev='vnet5'/>
>       <model type='virtio'/>
>       <alias name='net0'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x00'
> function='0x0'/>  
>     </interface>
>     <serial type='pty'>
>       <source path='/dev/pts/0'/>
>       <target type='system-serial' port='0'>
>         <model name='pl011'/>
>       </target>
>       <alias name='serial0'/>
>     </serial>
>     <console type='pty' tty='/dev/pts/0'>
>       <source path='/dev/pts/0'/>
>       <target type='serial' port='0'/>
>       <alias name='serial0'/>
>     </console>
>     <channel type='unix'>
>       <source mode='bind'
> path='/var/lib/libvirt/qemu/channel/target/domain-6-Alpine-3.18/org.qemu.guest_agent.0'/>
>       <target type='virtio' name='org.qemu.guest_agent.0'
> state='disconnected'/>  
>       <alias name='channel0'/>
>       <address type='virtio-serial' controller='0' bus='0' port='1'/>
>     </channel>
>     <audio id='1' type='none'/>
>     <memballoon model='virtio'>
>       <alias name='balloon0'/>
>       <address type='pci' domain='0x0000' bus='0x06' slot='0x00'
> function='0x0'/>  
>     </memballoon>
>     <rng model='virtio'>
>       <backend model='random'>/dev/urandom</backend>
>       <alias name='rng0'/>
>       <address type='pci' domain='0x0000' bus='0x07' slot='0x00'
> function='0x0'/>  
>     </rng>
>   </devices>
>   <seclabel type='dynamic' model='dac' relabel='yes'>
>     <label>+64055:+109</label>
>     <imagelabel>+64055:+109</imagelabel>
>   </seclabel>
> </domain>
> 
> # ifconfig
> eth0      Link encap:Ethernet  HWaddr 52:54:00:62:B1:4B
>           inet addr:192.168.1.211  Bcast:0.0.0.0  Mask:255.255.255.0
>           inet6 addr: fe80::5054:ff:fe62:b14b/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:35010 errors:0 dropped:10 overruns:0 frame:0
>           TX packets:983 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:2100600 (2.0 MiB)  TX bytes:296646 (289.6 KiB)
> 
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:65536  Metric:1
>           RX packets:18 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:1432 (1.3 KiB)  TX bytes:1432 (1.3 KiB)
> 
> # ip route
> default via 192.168.1.2 dev eth0  metric 1 onlink
> 192.168.1.0/24 dev eth0 scope link  src 192.168.1.211
> 
> # route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 0.0.0.0         192.168.1.2     0.0.0.0         UG    1      0        0 eth0
> 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
> 
> # ip link
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen
> 1000
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
> UP qlen 1000
>     link/ether 52:54:00:62:b1:4b brd ff:ff:ff:ff:ff:ff
> 
> # ping 192.168.1.211 -c 4
> PING 192.168.1.211 (192.168.1.211): 56 data bytes
> 64 bytes from 192.168.1.211: seq=0 ttl=64 time=0.130 ms
> 64 bytes from 192.168.1.211: seq=1 ttl=64 time=0.508 ms
> 64 bytes from 192.168.1.211: seq=2 ttl=64 time=0.235 ms
> 64 bytes from 192.168.1.211: seq=3 ttl=64 time=0.198 ms
> 
> --- 192.168.1.211 ping statistics ---
> 4 packets transmitted, 4 packets received, 0% packet loss
> round-trip min/avg/max = 0.130/0.267/0.508 ms
> 
> # ping 192.168.1.2 -c 4
> PING 192.168.1.2 (192.168.1.2): 56 data bytes
> 
> --- 192.168.1.2 ping statistics ---
> 4 packets transmitted, 0 packets received, 100% packet loss
> 
> # cat /etc/resolv.conf
> nameserver 192.168.1.3
> 
> # cat /var/log/dmesg | grep INET
> [    0.191443] NET: Registered PF_INET protocol family
> [    3.245211] NET: Registered PF_INET6 protocol family
> 
> # cat /var/log/dmesg | grep net
> localhost:/etc/network# cat /etc/network/interfaces
> auto eth0
> #iface eth0 inet dhcp
> iface eth0 inet static
>         address 192.168.1.211/24
>         gateway 192.168.1.2
> 
> # service networking restart
>  * Stopping networking ...
>  *   lo ...
>  [ ok ]
>  *   eth0 ...
>  [ ok ]
>  * Starting networking ...
>  *   lo ...
>  [ ok ]
>  *   eth0 ...
>  [ ok ]