Logrotate postrotate script fails to send SIGHUP to podman container

Question

I have rsyslog running in an podman container. It is receiving logs and writing them to a mounted directory on the host. The rotation of this log files in done on the host, but for some reason logrotate fails

Mar 22 03:13:01 mars logrotate[42141]: ALERT exited abnormally with [1]

I checked SELinux, but audit log doesn't show anything.

This is the logrotate config:

/var/log/fw.log {
    compress
    compresscmd /bin/xz
    uncompresscmd /bin/unxz
    compressext .xz
    dateext
    maxage 1
    rotate 1
    daily
    notifempty
    missingok
    create 0660 fluent fluent
    sharedscripts
    postrotate
        /bin/podman exec rsyslog-f5 /usr/bin/killall -HUP || false
    endscript
}

After the rotation, the file is copied to e.g. /var/log/fw.log-20230322, but rsyslog is not starting to write to the new file. If I run /bin/podman exec rsyslog-f5 /usr/bin/killall -HUP as root it works properly.

I already tried to add some debug output to the postrotate script

    postrotate
        /bin/podman exec rsyslog-f5 /usr/bin/killall -HUP rsyslogd 2>&1 > /tmp/postrotate.log || false
    endscript

but /tmp/postrotate.log was empty. A dry run with logrotate -d /etc/logrotate.d/fwlogs doesn't show any errors.