Bug 2115988

Description of problem:

I am running the application https://github.com/masneyb/cavedbmanager on RHEL 8.6 and it runs inside 4 different containers: a webserver, database, worker, and cron scheduler. Podman began to fail with the following error message after the most recent upgrade:

podman[3679]: Error: invalid config provided: extra host entries must be specified on the pod: network cannot be configured when it is shared with a pod

This worked prior to this package upgrade.


Version-Release number of selected component (if applicable):

podman-4.1.1-2.module+el8.6.0+15917+093ca6f8.x86_64


Steps to Reproduce:

Note that the code on that github link doesn't contain the systemd units that I use on RHEL 8.6. There's two of them that are relevant for this bug. The first starts the internal networking for the pod:

[Unit]
Description=WVASS Networking
Requires=network-online.target
After=network-online.target

[Service]
User=root
Type=forking
KillMode=none
Restart=on-failure
RemainAfterExit=yes
ExecStartPre=-podman pod rm wvass-server
ExecStart=podman pod create --name=wvass-server --share net -p 8443:443
ExecStop=podman pod rm wvass-server

[Install]
WantedBy=multi-user.target


The second systemd unit starts the postgresql database:

[Unit]
Description=WVASS PostgreSQL
Requires=network-online.target wvass-cavedbmanager-network.service
After=network-online.target wvass-cavedbmanager-network.service

# The ExecStart and ExecStop commands below were generated by running the docker-compose.yml file through podman-compose. I am pretty sure it was this project: https://github.com/containers/podman-compose. (I did this a few years ago.)

[Service]
User=root
Type=forking
KillMode=none
Restart=on-failure
RemainAfterExit=yes
WorkingDirectory=/var/data/wvass/cavedbmanager
ExecStartPre=-podman rm wvass-server_postgresql_1
ExecStartPre=podman build --file Dockerfile.base --tag cavedbmanager_base:latest .
ExecStartPre=podman build -t wvass-server_postgresql -f /var/data/wvass/cavedbmanager/Dockerfile.db /var/data/wvass/cavedbmanager
ExecStart=podman run -d --name=wvass-server_postgresql_1 --pod=wvass-server -e LC_CTYPE=C.UTF-8 -e PGDATA=/var/lib/postgresql -e PGUSER=XXX -e PGPASSWORD=XXX --mount type=bind,source=/var/data/wvass/cavedb-postgresql-10,destination=/var/lib/postgresql,bind-propagation=Z --add-host postgresql:127.0.0.1 --add-host wvass-server_postgresql_1:127.0.0.1 --add-host worker:127.0.0.1 --add-host wvass-server_worker_1:127.0.0.1 --add-host web:127.0.0.1 --add-host wvass-server_web_1:127.0.0.1 --add-host cron:127.0.0.1 --add-host wvass-server_cron_1:127.0.0.1 --expose 5432 wvass-server_postgresql
ExecStop=podman stop wvass-server_postgresql_1
ExecStopPost=podman rm wvass-server_postgresql_1
TimeoutSec=1800

[Install]
WantedBy=multi-user.target



Note that I see that someone else also encountered this same issue on RHEL 8.6 and reported it to the pi-hole forums: https://discourse.pi-hole.net/t/problem-after-update-rhel8-6-podman-to-version-4-1-1/56883