Description of problem:
To build and run container images in rootless environment w/ the following guideline.

please see https://bugzilla.redhat.com/show_bug.cgi?id=1804849#c0

Version-Release number of selected component (if applicable):
fuse-overlayfs-0.7.2-4.module+el8.2.0+5949+6277b64f.x86_64
podman-1.6.4-9.module+el8.2.0+5952+e75b58bb.x86_64

How reproducible:
always

Steps to Reproduce:
1. https://bugzilla.redhat.com/show_bug.cgi?id=1804849#c0

Actual results:

[ajia@hp-dl360g9-03 test]$ podman run --log-level=debug ohpc-gnu9-easybuild:1.9.9 'eb --robot lz4-1.9.2-GCCcore-8.3.0.eb'
DEBU[0000] Reading configuration file "/home/ajia/.config/containers/libpod.conf" 
DEBU[0000] Merged system config "/home/ajia/.config/containers/libpod.conf": &{{false false false true true true} 0 {   [] [] []} /home/ajia/.local/share/containers/storage/volumes docker://  runc map[crun:[/usr/bin/crun /usr/local/bin/crun] runc:[/usr/bin/runc /usr/sbin/runc /usr/local/bin/runc /usr/local/sbin/runc /sbin/runc /bin/runc /usr/lib/cri-o-runc/sbin/runc /run/current-system/sw/bin/runc]] [crun runc] [crun] [] [/usr/libexec/podman/conmon /usr/local/libexec/podman/conmon /usr/local/lib/podman/conmon /usr/bin/conmon /usr/sbin/conmon /usr/local/bin/conmon /usr/local/sbin/conmon /run/current-system/sw/bin/conmon] [PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin] cgroupfs  /home/ajia/.local/share/containers/storage/libpod /run/user/1001/libpod/tmp -1 false /etc/cni/net.d/ [/usr/libexec/cni /usr/lib/cni /usr/local/lib/cni /opt/cni/bin]  []   k8s.gcr.io/pause:3.1 /pause true true  2048 shm journald  ctrl-p,ctrl-q false} 
DEBU[0000] Using conmon: "/usr/bin/conmon"              
DEBU[0000] Initializing boltdb state at /home/ajia/.local/share/containers/storage/libpod/bolt_state.db 
DEBU[0000] Using graph driver overlay                   
DEBU[0000] Using graph root /home/ajia/.local/share/containers/storage 

...ignore...

DEBU[0000] running conmon: /usr/bin/conmon               args="[--api-version 1 -c d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87 -u d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87 -r /usr/bin/runc -b /home/ajia/.local/share/containers/storage/overlay-containers/d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87/userdata -p /run/user/1001/overlay-containers/d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87/userdata/pidfile -l k8s-file:/home/ajia/.local/share/containers/storage/overlay-containers/d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87/userdata/ctr.log --exit-dir /run/user/1001/libpod/tmp/exits --socket-dir-path /run/user/1001/libpod/tmp/socket --log-level debug --syslog --conmon-pidfile /run/user/1001/overlay-containers/d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87/userdata/conmon.pid --exit-command /usr/bin/podman --exit-command-arg --root --exit-command-arg /home/ajia/.local/share/containers/storage --exit-command-arg --runroot --exit-command-arg /run/user/1001 --exit-command-arg --log-level --exit-command-arg debug --exit-command-arg --cgroup-manager --exit-command-arg cgroupfs --exit-command-arg --tmpdir --exit-command-arg /run/user/1001/libpod/tmp --exit-command-arg --runtime --exit-command-arg runc --exit-command-arg --storage-driver --exit-command-arg overlay --exit-command-arg --storage-opt --exit-command-arg overlay.mount_program=/usr/bin/fuse-overlayfs --exit-command-arg --events-backend --exit-command-arg journald --exit-command-arg container --exit-command-arg cleanup --exit-command-arg d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87]"
[conmon:d]: failed to write to /proc/self/oom_score_adj: Permission denied

...ignore...

DEBU[0000] Started container d42ee40ba0aa1650517e64ff9545cd92fcf5c28f7ca68506c0a0b2279acd9e87 
DEBU[0000] Enabling signal proxying                     
ERROR: Build of /opt/ohpc/pub/libs/easybuild/4.1.1/software/EasyBuild/4.1.1/easybuild/easyconfigs/f/flex/flex-2.6.4.eb failed (err: "build failed (first 300 chars): Couldn't find file flex-2.6.4.tar.gz anywhere, and downloading it didn't work either... Paths attempted (in order): /opt/ohpc/pub/libs/easybuild/4.1.1/software/EasyBuild/4.1.1/easybuild/easyconfigs/f/flex/f/flex/flex-2.6.4.tar.gz, /opt/ohpc/pub/libs/easybuild/4.1.1/software/EasyBuild/4.1.1/easybuild")
== temporary log file in case of crash /tmp/eb-f33qzi1_/easybuild-y9_n9ub1.log
== resolving dependencies ...
== processing EasyBuild easyconfig /opt/ohpc/pub/libs/easybuild/4.1.1/software/EasyBuild/4.1.1/easybuild/easyconfigs/m/M4/M4-1.4.18.eb
== building and installing M4/1.4.18...

...ignore...

== building and installing flex/2.6.4...
== fetching files...
== FAILED: Installation ended unsuccessfully (build directory: /home/openhpc/.local/easybuild/build/flex/2.6.4/system-system): build failed (first 300 chars): Couldn't find file flex-2.6.4.tar.gz anywhere, and downloading it didn't work either... Paths attempted (in order): /opt/ohpc/pub/libs/easybuild/4.1.1/software/EasyBuild/4.1.1/easybuild/easyconfigs/f/flex/f/flex/flex-2.6.4.tar.gz, /opt/ohpc/pub/libs/easybuild/4.1.1/software/EasyBuild/4.1.1/easybuild (took 30 sec)
== Results of the build can be found in the log file(s) /tmp/eb-f33qzi1_/easybuild-flex-2.6.4-20200319.143638.laQZS.log



Expected results:


Additional info: