force xrootd user to uid 1000 in image

var/local/mkosi/mkosi.default

 [Distribution]
 Distribution=alma
 Release=8
-Repositories=BaseOS
+Repositories=baseos
 UseHostRepositories=True
 
 [Content]

var/local/mkosi/mkosi.postinst

@@ -18,3 +18,14 @@ yum install -y \
     python3-requests
 
 yum --disablerepo="*" --enablerepo="osg-upcoming-testing" install -y xrootd-rucioN2N-for-Xcache
+
+echo "Force xrootd user id to 1000"
+old_uid=$(id -u xrootd)
+old_gid=$(id -g xrootd)
+usermod -u 1000 xrootd
+groupmod -g 1000 xrootd
+
+echo "Upgrade permissions ..."
+# exclude /proc since this would try to modify the fd of the find process
+find / -path /proc -prune -o -uid ${old_uid} -exec chown -h xrootd {} \;
+find / -path /proc -prune -o -gid ${old_gid} -exec chgrp -h xrootd {} \;