Package: podman Version: 5.4.2+ds1-2+b1 Severity: normal Dear Maintainer,
Prior to Trixie/5.4.2, I had Podman bridged network defined as a subset of the IP range of my local physical network. This was configured via the CNI backend (following [1], my write-up was [2]). With the upgrade to Trixie, my CNI-backed network definitions were removed and my containers would not start. In repairing this, I discovered that 5.4.2 (with the Netavark backend) detects and prevents you configuring a Podman network that uses a subnet already available on the host. Assuming local network 192.168.1.0/24: $ podman network create --opt mode=unmanaged --interface-name=br0 --subnet 192.168.1.0/24 podbr0 Error: subnet 192.168.1.0/24 is already used on the host or by another config A workaround is to define it with a temporary subnet and then edit the JSON in /etc/containers/networks afterwards. This has been fixed by 5.6.2 (sid's package). I'm reporting it because I think it's useful to record the versions that are broken/fixed (I haven't found this reported upstream yet) but also because I would like to suggest backporting a fix (once identified/isolated) should be considered. [1] https://blog.carroarmato0.be/2020/05/08/exposing-podman-container-on-the-network/ [2] https://jmtd.net/log/podman_network/ -- System Information: Debian Release: 13.0 APT prefers stable APT policy: (990, 'stable'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386, ppc64el Kernel: Linux 6.12.38+deb13-amd64 (SMP w/12 CPU threads; PREEMPT) Kernel taint flags: TAINT_WARN Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) Versions of packages podman depends on: ii conmon 2.1.12-4 ii golang-github-containers-common 0.62.2+ds1-2 ii init-system-helpers 1.68 ii libc6 2.41-12 ii libgpgme11t64 1.24.2-3 ii libseccomp2 2.6.0-2 ii libsqlite3-0 3.46.1-7 ii libsubid5 1:4.17.4-2 ii netavark 1.14.0-2 ii runc 1.1.15+ds1-2+b4 Versions of packages podman recommends: ii buildah 1.39.3+ds1-1+b6 ii ca-certificates 20250419 ii containers-storage 1.57.2+ds1-1+b2 ii criu 4.1.1-1 ii dbus-user-session 1.16.2-2 ii libcriu2 4.1.1-1 ii passt 0.0~git20250503.587980c-2 ii slirp4netns 1.2.1-1.1 ii tini 0.19.0-3+b3 ii uidmap 1:4.17.4-2 Versions of packages podman suggests: ii containernetworking-plugins 1.1.1+ds1-3+b17 ii docker-compose 2.26.1-4 ii iptables 1.8.11-2 -- Configuration Files: /etc/cni/net.d/87-podman-bridge.conflist [Errno 13] Permission denied: '/etc/cni/net.d/87-podman-bridge.conflist' -- no debconf information
