podman: Cannot resolve other containers names in internal network

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

Containers in internal network are not able to see each other

Steps to reproduce the issue:

1. As rootless user.

2. ❯ podman network create --internal
   WARN[0000] dnsname and --internal networks are incompatible.  dnsname plugin not configured for network cni-podman0 
   /var/home/yajo/.config/cni/net.d/cni-podman0.conflist
   
   ❯ podman container run --rm -d --name a --net cni-podman0 docker.io/library/debian:10 sleep 5 && podman container run --rm -it --name b --net cni-podman0 docker.io/library/debian:10 ping a -c 1
   1e5526ee01a24161d6c135c15a8b2255383b771646338c38cb4790de98f5f66d
   ping: a: Temporary failure in name resolution
   

Describe the results you received:

Containers in same network cannot find each other.

Describe the results you expected:

Containers should see each other.

Additional information you deem important (e.g. issue happens only occasionally):

This works on docker:

❯ docker network create test --internal
09ca0528cc4ab395d64a1d73898c4ee7aa79605e0bb7abe9428e12b490c7a381

❯ docker container run --rm -d --name aaa --net test docker.io/library/debian:10 sleep 5 && docker container run --rm -it --name bbb --net test docker.io/library/debian:10 ping aaa -c 1
440c67d3482ffcba2477c8418b0fe450de5bfe973f2873cc68f2ca4de0460c19
PING aaa (172.23.0.2) 56(84) bytes of data.
64 bytes from aaa.test (172.23.0.2): icmp_seq=1 ttl=64 time=0.118 ms

--- aaa ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.118/0.118/0.118/0.000 ms

Output of podman version:

Version:      3.2.0
API Version:  3.2.0
Go Version:   go1.16.3
Built:        Wed Jun  9 15:24:16 2021
OS/Arch:      linux/amd64

Output of podman info --debug:

host:
  arch: amd64
  buildahVersion: 1.21.0
  cgroupControllers: []
  cgroupManager: cgroupfs
  cgroupVersion: v1
  conmon:
    package: conmon-2.0.27-2.fc34.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.27, commit: '
  cpus: 12
  distribution:
    distribution: fedora
    version: "34"
  eventLogger: journald
  hostname: yajolap-tecnativa-com
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 5.12.9-300.fc34.x86_64
  linkmode: dynamic
  memFree: 731549696
  memTotal: 16613015552
  ociRuntime:
    name: crun
    package: crun-0.20.1-1.fc34.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 0.20.1
      commit: 0d42f1109fd73548f44b01b3e84d04a279e99d2e
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +YAJL
  os: linux
  remoteSocket:
    path: /run/user/1000/podman/podman.sock
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: true
    seccompEnabled: true
    seccompProfilePath: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.1.9-1.fc34.x86_64
    version: |-
      slirp4netns version 1.1.8+dev
      commit: 6dc0186e020232ae1a6fcc1f7afbc3ea02fd3876
      libslirp: 4.4.0
      SLIRP_CONFIG_VERSION_MAX: 3
      libseccomp: 2.5.0
  swapFree: 16959922176
  swapTotal: 16965951488
  uptime: 1h 25m 49.31s (Approximately 0.04 days)
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - docker.io
  - quay.io
store:
  configFile: /var/home/yajo/.config/containers/storage.conf
  containerStore:
    number: 3
    paused: 0
    running: 0
    stopped: 3
  graphDriverName: overlay
  graphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-1.5.0-1.fc34.x86_64
      Version: |-
        fusermount3 version: 3.10.3
        fuse-overlayfs: version 1.5
        FUSE library version 3.10.3
        using FUSE kernel interface version 7.31
  graphRoot: /var/home/yajo/.local/share/containers/storage
  graphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  imageStore:
    number: 18
  runRoot: /run/user/1000/containers
  volumePath: /var/home/yajo/.local/share/containers/storage/volumes
version:
  APIVersion: 3.2.0
  Built: 1623248656
  BuiltTime: Wed Jun  9 15:24:16 2021
  GitCommit: ""
  GoVersion: go1.16.3
  OsArch: linux/amd64
  Version: 3.2.0

Package info (e.g. output of rpm -q podman or apt list podman):

podman-3.2.0-5.fc34.x86_64

Have you tested with the latest version of Podman and have you checked the Podman Troubleshooting Guide? (https://github.com/containers/podman/blob/master/troubleshooting.md)

Yes

Additional environment details (AWS, VirtualBox, physical, etc.):

Physical Fedora Silverblue 34. Trying to migrate from docker-compose project that needs internal network with discovery.