[Libguestfs] Re: appliance not getting ipv4 assigned when host kernel has CONFIG_IPV6_SIT builtin

On 6/24/2025 3:04 PM, Stefano Brivio wrote: I updated my Ubuntu 24.04 system to the latest version using apt upgrade. Following the update, I can now run virt-customize as a non-root user with passt, resolving the previous permission issue. However, I am still encountering the original issue I faced with libslirp and now with passt: the network interfaces inside the libguestfs appliance are not being assigned IP addresses. I have attached the new logs for your review. Thank you for your time and assistance. /# dpkg -l | grep passt/ ii  passt 0.0~git20240220.1e6f92b-1                  amd64        user-mode networking daemons for virtual machines and namespaces /# sudo -u amd virt-customize -v -x -a /home/amd/noble-server-cloudimg-amd64.qcow2 --install isc-dhcp-client/ .. libguestfs: command: run: passt --help Usage: passt [OPTION]...   -d, --debug\t\tBe verbose       --trace\t\tBe extra verbose, implies --debug .. .. libguestfs: command: run: passt libguestfs: command: run: \ --one-off libguestfs: command: run: \ --socket /tmp/libguestfsTs3w5r/passt.sock libguestfs: command: run: \ --pid /tmp/libguestfsTs3w5r/passt1.pid libguestfs: command: run: \ --address 169.254.2.15 libguestfs: command: run: \ --netmask 16 libguestfs: command: run: \ --mac-addr 52:56:00:00:00:02 libguestfs: command: run: \ --gateway 169.254.2.2 No routable interface for IPv6: IPv6 is disabled Template interface: enp97s0 (IPv4) MAC:     host: 52:56:00:00:00:02 DHCP:     assign: 169.254.2.15     mask: 255.255.0.0     router: 169.254.2.2 DNS:     169.254.2.2 DNS search list:     amd.com UNIX domain socket bound at /tmp/libguestfsTs3w5r/passt.sock You can now start qemu (>= 7.2, with commit 13c6be96618c):     kvm ... -device virtio-net-pci,netdev=s -netdev stream,id=s,server=off,addr.type=unix,addr.path=/tmp/libguestfsTs3w5r/passt.sock or qrap, for earlier qemu versions:     ./qrap 5 kvm ... -net socket,fd=5 -net nic,model=virtio /usr/bin/qemu-system-x86_64 \     -global virtio-blk-pci.scsi=off \     -no-user-config \     -nodefaults \ .. *    -netdev stream,id=usernet,addr.type=unix,addr.path=/tmp/libguestfsTs3w5r/passt.sock \*     -device virtio-net-pci,netdev=usernet \ .. .. + ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 brd 127.255.255.255 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host        valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000     link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff     inet6 fe80::5054:ff:fe12:3456/64 scope link tentative        valid_lft forever preferred_lft forever 3: sit0@NONE: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN group default qlen 1000     link/sit 0.0.0.0 brd 0.0.0.0     inet6 ::127.0.0.1/96 scope host        valid_lft forever preferred_lft forever .. Reading package lists... W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/noble/InRelease  Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/noble-updates/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/noble-backports/InRelease Temporary failure resolving 'archive.ubuntu.com' W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/noble-security/InRelease Temporary failure resolving 'security.ubuntu.com' W: Some index files failed to download. They have been ignored, or old ones used instead. Reading package lists... Building dependency tree... Reading state information... E: Unable to locate package isc-dhcp-client ..