libvirt `virtstoraged` service fails to start

[jbtrystram]

On a fresh FCOS install, with the libvirt sysext, virtiostoraged does not start :

Starting virtstoraged.service - libvirt storage daemon...
libvirt version: 11.6.0, package: 2.fc43 (Fedora Project, 2025-10-31-17:46:30, )
hostname: yajuro.trystram.net
internal error: Failed to load module '/usr/lib64/libvirt/storage-backend/libvirt_storage_backend_iscsi-direct.so': libiscsi.so.10: cannot open shared object file: No such file or directory
virtstoraged.service: Main process exited, code=exited, status=3/NOTIMPLEMENTED
virtstoraged.service: Failed with result 'exit-code'.
Failed to start virtstoraged.service - libvirt storage daemon.
``

[jbtrystram]

I tried adding the libiscsi package that provides /usr/lib64/iscsi/libiscsi.so.10 to the sysext with no success

edit: found out that libiscsi was already pulled as a transitive dependency, no need to add it explicitely

[jbtrystram]

The issue lies in that the libiscsi rpm add a drop-in config to the linker under /etc and this is ignored by the sysext.
So here is how I worked around this :

diff --git a/libvirtd/justfile b/libvirtd/justfile
index bbd12ad..c606fe4 100644
--- a/libvirtd/justfile
+++ b/libvirtd/justfile
@@ -79,5 +80,12 @@ install-manual:
         ${SUDO} rmdir sbin
     fi
 
+    # Make libiscsi libs visible by the linker
+    # libisci add a config drop-in to the linker under /etc
+    # See https://src.fedoraproject.org/rpms/libiscsi/blob/rawhide/f/libiscsi.spec#_39
+    # Ideally the linker would source configs from /usr as well
+    ${SUDO} mkdir -p ./usr/lib/ld.so.conf.d/
+    ${SUDO} mv ./etc/ld.so.conf.d/* ./usr/lib/ld.so.conf.d
+
     # Empty out /var & /boot
     ${SUDO} rm -rf ./var ./boot

You will need to add the following drop-in to your /etc :

cat <<EOF > /etc/ld.so.conf.d/sysext-usr.conf 
include /usr/lib/ld.so.conf.d/*.conf
EOF

Hopefully we can get the glibc fedora package to source this by default.