Yeah faced that issue a couple of weeks ago as well after updating Podman. It didn’t allow me to set container individual UID/GID mappings or UserNS when running in a pod, so I just took them out of the pod as I couldn’t be bothered and run them as separate containers in the same network. Works just as good.

You just have to make sure to move the PublishPort block from the pod quadlet to the gluetun container (for all the containers which route their traffic through gluetun, i.e. which have ‘Network=container: gluetun’ set). This should solve the problem and still allows you to use UserNS or UID/GID mappings on the containers. No disadvantages so far, you just lose the convenience of stopping/starting all the containers at once through the pod. But I’d rather take this ‘inconvenience’ than troubleshooting for days how to make it work with a pod again.

Nice, did the move from docker to podman a couple of months ago myself. Now running the arr stack, nextcloud, immich and some other services as quadlets. File permission due to podmans rootless nature usually was the culprit if something was not working properly.

I can share my quadlet systemd files I use for the arr stack. I deployed it as a pod:

[Unit]
Description=Arr-stack pod

[Pod]
PodName=arr-stack
# Jellyseerr Port Mapping
PublishPort=8055:5055
# Sonarr Port Mapping
PublishPort=8089:8989
# Radarr Port Mapping
PublishPort=8078:7878
# Prowlarr Port Mapping
PublishPort=8096:9696
# Flaresolverr Port Mapping
PublishPort=8091:8191
# qBittorrent Port Mapping
PublishPort=8080:8080
---
[Unit]
Description=Gluetun Container

[Container]
ContainerName=gluetun
EnvironmentFile=global.env
EnvironmentFile=gluetun.env
Environment=FIREWALL_INPUT_PORTS=8080
Image=docker.io/qmcgaw/gluetun:v3.40.0
Pod=arr-stack.pod
AutoUpdate=registry
PodmanArgs=--privileged
AddCapability=NET_ADMIN
AddDevice=/dev/net/tun:/dev/net/tun

Volume=%h/container_volumes/gluetun/conf:/gluetun:Z,U

Secret=openvpn_user,type=env,target=OPENVPN_USER
Secret=openvpn_password,type=env,target=OPENVPN_PASSWORD

[Service]
Restart=always

[Install]
WantedBy=default.target
---
[Unit]
Description=qBittorrent Container
Requires=gluetun.service
After=gluetun.service

[Container]
ContainerName=qbittorrent
EnvironmentFile=global.env
Environment=WEBUI_PORT=8080
Image=lscr.io/linuxserver/qbittorrent:5.1.2
AutoUpdate=registry
UserNS=keep-id:uid=1000,gid=1000
Pod=arr-stack.pod
Network=container:gluetun

Volume=%h/container_volumes/qbittorrent/conf:/config:Z,U
Volume=%h/Downloads/completed:/downloads:z,U
Volume=%h/Downloads/incomplete:/incomplete:z,U
Volume=%h/Downloads/torrents:/torrents:z,U

[Service]
Restart=always

[Install]
WantedBy=default.target
---
[Unit]
Description=Prowlarr Container
Requires=gluetun.service
After=gluetun.service

[Container]
ContainerName=prowlarr
EnvironmentFile=global.env
Image=lscr.io/linuxserver/prowlarr:2.0.5
AutoUpdate=registry
UserNS=keep-id:uid=1000,gid=1000
Pod=arr-stack.pod
Network=container:gluetun

HealthCmd=["curl","--fail","http://127.0.0.1:9696/prowlarr/ping"]
HealthInterval=30s
HealthRetries=10

Volume=%h/container_volumes/prowlarr/conf:/config:Z,U

[Service]
Restart=always

[Install]
WantedBy=default.target
---
[Unit]
Description=Flaresolverr Container

[Container]
ContainerName=flaresolverr
EnvironmentFile=global.env
Image=ghcr.io/flaresolverr/flaresolverr:v3.4.0
AutoUpdate=registry
Pod=arr-stack.pod
Network=container:gluetun

[Service]
Restart=always

[Install]
WantedBy=default.target
---
[Unit]
Description=Radarr Container

[Container]
ContainerName=radarr
EnvironmentFile=global.env
Image=lscr.io/linuxserver/radarr:5.27.5
AutoUpdate=registry
UserNS=keep-id:uid=1000,gid=1000
Pod=arr-stack.pod
Network=container:gluetun

HealthCmd=["curl","--fail","http://127.0.0.1:7878/radarr/ping"]
HealthInterval=30s
HealthRetries=10

# Disable SecurityLabels due to SMB share
SecurityLabelDisable=true
Volume=%h/container_volumes/radarr/conf:/config:Z,U
Volume=/mnt/movies:/movies
Volume=%h/Downloads/completed/radarr:/downloads:z,U

[Service]
Restart=always

[Install]
WantedBy=default.target
---
[Unit]
Description=Sonarr Container

[Container]
ContainerName=sonarr
EnvironmentFile=global.env
Image=lscr.io/linuxserver/sonarr:4.0.15
AutoUpdate=registry
UserNS=keep-id:uid=1000,gid=1000
Pod=arr-stack.pod
Network=container:gluetun

HealthCmd=["curl","--fail","http://127.0.0.1:8989/sonarr/ping"]
HealthInterval=30s
HealthRetries=10

# Disable SecurityLabels due to SMB share
SecurityLabelDisable=true
Volume=%h/container_volumes/sonarr/conf:/config:Z,U
Volume=/mnt/tv:/tv
Volume=%h/Downloads/completed/sonarr:/downloads:z,U

[Service]
Restart=always

[Install]
WantedBy=default.target
---
[Unit]
Description=Jellyseerr Container

[Container]
ContainerName=jellyseerr
EnvironmentFile=global.env
Image=docker.io/fallenbagel/jellyseerr:2.7.3
AutoUpdate=registry
Pod=arr-stack.pod
Network=container:gluetun

Volume=%h/container_volumes/jellyseerr/conf:/app/config:Z,U

[Service]
Restart=always

[Install]
WantedBy=default.target

I run my podman containers in a VM running Alma Linux. Works pretty great so far.

Had the same issue when debugging systemctl errors, journalctl not being very helpful. At one point I just ran podman logs -f <container> in another terminal in a while loop just to catch the logs of the application. Not the most sophisticated approach, but it works 😄