rootless Podman-compose containers cannot reach eachother

Hello experts,

I'm having issues getting two containers reach each other with rootless podman-compose. Tested using a simple test compose file.

Reference links and my findings. https://github.com/containers/podman/blob/main/docs/tutorials/basic_networking.md, (also tried using $host IP, in compose file) https://github.com/containers/podman/blob/main/docs/tutorials/rootless_tutorial.md https://github.com/rootless-containers/slirp4netns#usage, (at step Make sure the tap0 is configured and connected to the Internet, i have no tap0 interface )

slirp4netns --version

slirp4netns version 1.2.0
commit: unknown
libslirp: 4.7.0
SLIRP_CONFIG_VERSION_MAX: 5
libseccomp: 2.5.4

podman-compose file:

version: '4'

services:
  container1:
    image: alpine
    command: ping container2 -c 5
    networks:
      - net
  container2:
    image: alpine
    command: sleep 3600
    networks:
      - net
networks:
  net:
    driver: bridge

Output podman-compose up:

podman-compose version: 1.0.6
['podman', '--version', '']
using podman version: 4.5.0
** excluding:  set()
['podman', 'ps', '--filter', 'label=io.podman.compose.project=webtest', '-a', '--format', '{{ index .Labels "io.podman.compose.config-hash"}}']
['podman', 'network', 'exists', 'webtest_net']
podman create --name=webtest_container1_1 --label io.podman.compose.config-hash=8e9cbc83f8355e33f49e9023c1f48598117d7be3567eddafbaceebe075519db3 --label io.podman.compose.project=webtest --label io.podman.compose.version=1.0.6 --label PODMAN_SYSTEMD_UNIT=podman-compose@webtest.service --label com.docker.compose.project=webtest --label com.docker.compose.project.working_dir=/home/support/documents/webtest --label com.docker.compose.project.config_files=podman-compose.yml --label com.docker.compose.container-number=1 --label com.docker.compose.service=container1 --net webtest_net --network-alias container1 alpine ping container2 -c 5
455c1467872a65094d4413e37f910812b42e2a1f43bdee7df09bcf78645a1a53
exit code: 0
['podman', 'network', 'exists', 'webtest_net']
podman create --name=webtest_container2_1 --label io.podman.compose.config-hash=8e9cbc83f8355e33f49e9023c1f48598117d7be3567eddafbaceebe075519db3 --label io.podman.compose.project=webtest --label io.podman.compose.version=1.0.6 --label PODMAN_SYSTEMD_UNIT=podman-compose@webtest.service --label com.docker.compose.project=webtest --label com.docker.compose.project.working_dir=/home/support/documents/webtest --label com.docker.compose.project.config_files=podman-compose.yml --label com.docker.compose.container-number=1 --label com.docker.compose.service=container2 --net webtest_net --network-alias container2 alpine sleep 3600
0fea1c2b0d0f30a2539d4e7731883df6b9b772a95ba9743826ba556d980af8a5
exit code: 0
podman start -a webtest_container1_1
ping: bad address 'container2'
exit code: 1
podman start -a webtest_container2_1

podman network inspect webtest_net
[
     {
          "name": "webtest_net",
          "id": "bd9deb5046ae45ddf508c4a4ec369a2774a6d93f075224dd166407e9952d45f3",
          "driver": "bridge",
          "network_interface": "cni-podman2",
          "created": "2023-05-31T09:46:49.909249451+02:00",
          "subnets": [
               {
                    "subnet": "10.89.1.0/24",
                    "gateway": "10.89.1.1"
               }
          ],
          "ipv6_enabled": false,
          "internal": false,
          "dns_enabled": false,
          "labels": {
               "com.docker.compose.project": "webtest",
               "io.podman.compose.project": "webtest"
          },
          "ipam_options": {
               "driver": "host-local"
          }
     }
]

What did I miss how can I get container1 to ping container2? Thank you for your time.

Small update, I managed to get tap0.

slirp4netns --configure --mtu=65520 --disable-host-loopback $(cat /tmp/pid) tap0

sent tapfd=5 for tap0
received tapfd=5
Starting slirp
* MTU:             65520
* Network:         10.0.2.0
* Netmask:         255.255.255.0
* Gateway:         10.0.2.2
* DNS:             10.0.2.3
* DHCP begin:      10.0.2.15
* DHCP end:        10.0.2.30
* Recommended IP:  10.0.2.100

ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: tap0: <BROADCAST,UP,LOWER_UP> mtu 65520 qdisc pfifo_fast state UNKNOWN group default
qlen 1000
    link/ether 02:47:f7:48:9f:02 brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.100/24 brd 10.0.2.255 scope global tap0
       valid_lft forever preferred_lft forever
    inet6 fe80::47:f7ff:fe48:9f02/64 scope link
       valid_lft forever preferred_lft forever

Where should I be running podman-compose up from? If I open a new Terminal, I still get same error and from Terminal 1 I get:

Error: creating runtime temporary files directory: mkdir /run/libpod: permission denied

rootless-containers / slirp4netns

rootless Podman-compose containers cannot reach eachother #314