Pod creation: cannot expose 2 different host ports pointing to the same pod port

[paoloantinori]

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

/kind bug

Description

I'm trying to create a pod that exposes 2 different host ports but that wants the to point to the same pod port.

Steps to reproduce the issue:

1. podman pod create --name=test --share net -p 8080:8080 -p 8081:8080

Describe the results you received:

10:11 $ podman pod create --name=test --share net -p 8080:8080 -p 8081:8080
Error: conflicting port mappings for container port 8080 (protocol tcp)

Describe the results you expected:
Podman to allow the operation.
This use case is actually something coming from a docker-compose configuration that failed when I run it via podman-compose and the reported command is the one that was produced by podman-compose

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

Output of podman version:

10:27 $ podman --version 
podman version 2.0.2

Output of podman info --debug:

host:
  arch: amd64
  buildahVersion: 1.15.0
  cgroupVersion: v2
  conmon:
    package: conmon-2.0.18-1.fc32.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.18, commit: 6e8799f576f11f902cd8a8d8b45b2b2caf636a85'
  cpus: 8
  distribution:
    distribution: fedora
    version: "32"
  eventLogger: file
  hostname: trane
  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: 5.7.9-200.fc32.x86_64
  linkmode: dynamic
  memFree: 2878697472
  memTotal: 33014153216
  ociRuntime:
    name: crun
    package: Unknown
    path: /usr/local/bin/crun
    version: |-
      crun version 0.13.115-0bb6
      commit: 0bb65c7cf939ed3596a9f3798978b27c9635fff6
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +EBPF +YAJL
  os: linux
  remoteSocket:
    path: /run/user/1000/podman/podman.sock
  rootless: true
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.1.4-1.fc32.x86_64
    version: |-
      slirp4netns version 1.1.4
      commit: b66ffa8e262507e37fca689822d23430f3357fe8
      libslirp: 4.3.1
      SLIRP_CONFIG_VERSION_MAX: 2
  swapFree: 16599351296
  swapTotal: 16609439744
  uptime: 22h 46m 35.14s (Approximately 0.92 days)
registries:
  search:
  - docker.io
  - registry-proxy.engineering.redhat.com
  - registry.fedoraproject.org
  - quay.io
  - registry.redhat.io
  - registry.centos.org
store:
  configFile: /home/pantinor/.config/containers/storage.conf
  containerStore:
    number: 11
    paused: 0
    running: 0
    stopped: 11
  graphDriverName: overlay
  graphOptions:
    overlay.mount_program:
      Executable: /usr/bin/fuse-overlayfs
      Package: fuse-overlayfs-1.1.2-1.fc32.x86_64
      Version: |-
        fusermount3 version: 3.9.1
        fuse-overlayfs: version 1.1.0
        FUSE library version 3.9.1
        using FUSE kernel interface version 7.31
  graphRoot: /home/pantinor/.local/share/containers/storage
  graphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  imageStore:
    number: 36
  runRoot: /run/user/1000/containers
  volumePath: /home/pantinor/.local/share/containers/storage/volumes
version:
  APIVersion: 1
  Built: 0
  BuiltTime: Thu Jan  1 01:00:00 1970
  GitCommit: ""
  GoVersion: go1.14.3
  OsArch: linux/amd64
  Version: 2.0.2

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

podman-2.0.2-1.fc32.x86_64

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

Fedora release 32 (Thirty Two)

[mheon]

I'll take this one. Need to verify that it is actually possible with CNI.

[mheon]

Looks like this does work in 1.9.3.

[mheon]

Fixed by #7074

[paoloantinori]

Thank you!