Podman is listening on the wrong port / API is not accessible from outside

[sitrain-dotcom]

Hi
i have created a small test WebApi with FastApi for testing. Unfortunately, this is not accessible outside the host computer in the network.

Here my Python Code:

import uvicorn
from fastapi.staticfiles import StaticFiles
from fastapi.middleware.cors import CORSMiddleware
from fastapi import FastAPI, UploadFile, File

app = FastAPI()
use_gpu = True

origins = ["*"]

app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


# Endpunkt /ovis2B:
@app.get("/Test/")
async def root():
    output = "TestOutput"
    return {"message": output}


# Starten des Servers
if __name__ == '__main__':
    uvicorn.run(app="app:app", host="0.0.0.0", port=8048)

and here the console output:

(.venv) PS E:\python_workspace> python app.py
INFO:     Started server process [21464]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://0.0.0.0:8048 (Press CTRL+C to quit)

The output with 'netstat -ano | findstr :8048' when I start the server with podman is as follows :

TCP 127.0.0.1:8048 0.0.0.0:0 LISTENING XXXX

and when I start the server with docker the output is as follows:

TCP 0.0.0.0:8048 0.0.0.0:0 LISTENING XXXX

Podman is only accessible locally and docker is also accessible outside the host computer.
The container was tested with -p 8048:8048 and once with --network=host.
Neither of these brought the desired success.

Can someone please tell me how to fix this problem?

Thank you very much in advance for the tips

Best regards
René

[baude]

it might be helpful to post the entire command line you used to run the container in question.

If I had to guess, you are running this as rootless and you likely have a firewall. We don't punch holes in your firewall for rootless (i believe this is true). If you run it as rootful, do you get the desired outcome ?

[sitrain-dotcom]

Hi I have set the machine to rootful, according to podman info the machine is, rootless= false. Its not working, its the same result.

PS C:\WINDOWS\system32> podman info
host:
  arch: amd64
  buildahVersion: 1.38.0
  cgroupControllers:
  - cpuset
  - cpu
  - cpuacct
  - blkio
  - memory
  - devices
  - freezer
  - net_cls
  - perf_event
  - net_prio
  - hugetlb
  - pids
  - rdma
  - misc
  cgroupManager: cgroupfs
  cgroupVersion: v1
  conmon:
    package: conmon-2.1.12-2.fc40.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.12, commit: '
  cpuUtilization:
    idlePercent: 99.94
    systemPercent: 0.03
    userPercent: 0.03
  cpus: 28
  databaseBackend: sqlite
  distribution:
    distribution: fedora
    variant: container
    version: "40"
  eventLogger: journald
  freeLocks: 2047
  hostname: OWED-DES001
  idMappings:
    gidmap: null
    uidmap: null
  kernel: 5.15.167.4-microsoft-standard-WSL2
  linkmode: dynamic
  logDriver: journald
  memFree: 15672463360
  memTotal: 16616431616
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.13.1-1.fc40.x86_64
      path: /usr/libexec/podman/aardvark-dns
      version: aardvark-dns 1.13.1
    package: netavark-1.13.1-1.fc40.x86_64
    path: /usr/libexec/podman/netavark
    version: netavark 1.13.1
  ociRuntime:
    name: crun
    package: crun-1.19.1-1.fc40.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 1.19.1
      commit: 3e32a70c93f5aa5fea69b50256cca7fd4aa23c80
      rundir: /run/crun
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +LIBKRUN +WASM:wasmedge +YAJL
  os: linux
  pasta:
    executable: /usr/bin/pasta
    package: passt-0^20241211.g09478d5-1.fc40.x86_64
    version: |
      pasta 0^20241211.g09478d5-1.fc40.x86_64
      Copyright Red Hat
      GNU General Public License, version 2 or later
        <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
      This is free software: you are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.
  remoteSocket:
    exists: true
    path: unix:///run/podman/podman.sock
  rootlessNetworkCmd: pasta
  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: false
    seccompEnabled: true
    seccompProfilePath: /usr/share/containers/seccomp.json
    selinuxEnabled: false
  serviceIsRemote: true
  slirp4netns:
    executable: ""
    package: ""
    version: ""
  swapFree: 4294967296
  swapTotal: 4294967296
  uptime: 0h 21m 19.00s
  variant: ""
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - docker.io
store:
  configFile: /usr/share/containers/storage.conf
  containerStore:
    number: 1
    paused: 0
    running: 0
    stopped: 1
  graphDriverName: overlay
  graphOptions:
    overlay.imagestore: /usr/lib/containers/storage
    overlay.mountopt: nodev,metacopy=on
  graphRoot: /var/lib/containers/storage
  graphRootAllocated: 1081101176832
  graphRootUsed: 13062864896
  graphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Supports shifting: "false"
    Supports volatile: "true"
    Using metacopy: "true"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 3
  runRoot: /run/containers/storage
  transientStore: false
  volumePath: /var/lib/containers/storage/volumes
version:
  APIVersion: 5.3.1
  Built: 1732147200
  BuiltTime: Thu Nov 21 01:00:00 2024
  GitCommit: ""
  GoVersion: go1.22.7
  Os: linux
  OsArch: linux/amd64
  Version: 5.3.1

'port forwarding without function (no connection from outside)
podman run --device nvidia.com/gpu=all -dit -v C:\Podman\AppHuggingFace:/App -p 8048:8048 --name python_container library/python bash

'port forwarding only works with port proxy (without a port proxy this does not work either)
podman run --net=host --device nvidia.com/gpu=all -dit -v C:\Podman\AppHuggingFace:/App --name python_container library/python bash

I then start the Python script with the WebApi manually when the container is running.

Yes, there is a firewall on the host computer, but the port is enabled both outgoing and incoming.
The operating system on the host is Windows 11 Enterprise 24H2

Do you need more information?
I am unfortunately a total Docker/Podman noob....

Thank you very much in advance for the tips

Best regards
René

[Luap99]

WSL is an entirely different thing networking wise, it doesn't expose ports to your LAN by default so this is expoected

#17030
https://learn.microsoft.com/en-us/windows/wsl/networking#accessing-a-wsl-2-distribution-from-your-local-area-network-lan