[lxc-users] ArchLinux container network problems with systemd 244 (systemd 243 works ok)

[John]

Hello,

Just reporting this problem I'm experiencing with Arch Linux on LXD.

Create container using "images:archlinux/current/amd64" and with a
network interface connected to a bridge.

Configure /etc/systemd/network/mynetif.network to configure by DHCP:

[Match]
Name=mynetif

[Network]
DHCP=ipv4

Start network

# systemctl enable --now systemd-networkd

Observe network stuck pending

# networkctl
IDX LINK      TYPE     OPERATIONAL SETUP
  1 lo        loopback carrier     unmanaged
335 mynetif   ether    routable    pending

Confirm systemd version

# systemctl --version

systemd 244 (244.1-1-arch)
+PAM +AUDIT -SELINUX -IMA -APPARMOR +SMACK -SYSVINIT +UTMP
+LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS
+KMOD +IDN2 -IDN +PCRE2 default-hierarchy=hybrid

Install systemd 243.78.2-arch
(download from https://archive.archlinux.org/packages/s/systemd)

(from outside container)
# lxc file push systemd-243.78-2-x86_64.pkg.tar.xz mycontainer/root

(then inside container)
# pacman -U systemd-243.78-2-x86_64.pkg.tar.xz

Confirm systemd version

# systemctl --version
systemd 243 (243.78-2-arch)
+PAM +AUDIT -SELINUX -IMA -APPARMOR +SMACK -SYSVINIT +UTMP
+LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS
+KMOD +IDN2 -IDN +PCRE2 default-hierarchy=hybrid

Restart systemd-networkd

# systemctl restart systemd-networkd

Observer network configured successfully

# networkctl

IDX LINK      TYPE     OPERATIONAL SETUP
  1 lo        loopback carrier     unmanaged
335 mynetif   ether    routable    configured

I did look at the system-networkd journal and there was nothing there to
indicate a problem. If I manually configure the interface (using ip)
then it works (so the network layer is ok, it's just systemd starting
things that's broken).

Anyone else observe this?