Container inspect endpoint is not Docker-API compatible

[apollo13]

Issue Description

I am currently playing with podman compose utilizing the upstream docker-compose as backend. It always recreates the container because the network config is not as it should be. I added some debug prints to the docker-compose code and it cannot match the networks because the NetworkID returned by podman is wrong.

Running something along the lines of podman inspect 4cb3ce78cde3 --format="{{ json .NetworkSettings.Networks }}"|jq returns:

{
  "tmp_default": {
    "EndpointID": "",
    "Gateway": "10.89.0.1",
    "IPAddress": "10.89.0.3",
    "IPPrefixLen": 24,
    "IPv6Gateway": "",
    "GlobalIPv6Address": "",
    "GlobalIPv6PrefixLen": 0,
    "MacAddress": "c2:79:d5:75:e5:09",
    "NetworkID": "tmp_default",
    "DriverOpts": null,
    "IPAMConfig": null,
    "Links": null,
    "Aliases": [
      "tmp-traefik-1",
      "traefik",
      "4cb3ce78cde3"
    ]
  }
}

Here we can see that NetworkID is the network name and not the id of the network (podman network inspect tmp_default):

[
     {
          "name": "tmp_default",
          "id": "675bea81a6d49e9f1ae909c58a2269524a9a9c910f91bce12a85b05b882ab5cb",
          "driver": "bridge",
          "network_interface": "podman1",
          "created": "2024-12-28T20:54:28.320995381+01:00",
          "subnets": [
               {
                    "subnet": "10.89.0.0/24",
                    "gateway": "10.89.0.1"
               }
          ],
          "ipv6_enabled": false,
          "internal": false,
          "dns_enabled": true,
          "labels": {
               "com.docker.compose.config-hash": "4bd7e5f2ecc11ab238c4eb5931f77d1e2196619bcc8daeeb80428562a7210c37",
               "com.docker.compose.network": "default",
               "com.docker.compose.project": "tmp",
               "com.docker.compose.version": "2.32.1"
          },
          "options": {
               "isolate": "true"
          },
          "ipam_options": {
               "driver": "host-local"
          },
          "containers": {
               "4cb3ce78cde33f763bdd6abe5b19a5d93f5bb30043c94fa489114a48da5d4290": {
                    "name": "tmp-traefik-1",
                    "interfaces": {
                         "eth0": {
                              "subnets": [
                                   {
                                        "ipnet": "10.89.0.3/24",
                                        "gateway": "10.89.0.1"
                                   }
                              ],
                              "mac_address": "c2:79:d5:75:e5:09"
                         }
                    }
               }
          }
     }
]

Steps to reproduce the issue

Steps to reproduce the issue

1. podman run --rm -it --name testing ubuntu:latest sleep infinity
2. podman inspect testing --format="{{ json .NetworkSettings.Networks.podman }}"|jq
3. Observe that the NetworkID is the network name

Describe the results you received

I would have expected the actual NetworkID to be shown

Describe the results you expected

The network name is shown as ID

podman info output

host:
  arch: amd64
  buildahVersion: 1.38.0
  cgroupControllers:
  - cpuset
  - cpu
  - io
  - memory
  - hugetlb
  - pids
  - rdma
  - misc
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.12-3.fc41.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.12, commit: '
  cpuUtilization:
    idlePercent: 97.27
    systemPercent: 0.8
    userPercent: 1.93
  cpus: 16
  databaseBackend: sqlite
  distribution:
    distribution: fedora
    variant: workstation
    version: "41"
  eventLogger: journald
  freeLocks: 2046
  hostname: apollo13
  idMappings:
    gidmap: null
    uidmap: null
  kernel: 6.12.4-200.fc41.x86_64
  linkmode: dynamic
  logDriver: journald
  memFree: 6023499776
  memTotal: 32395685888
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.13.1-1.fc41.x86_64
      path: /usr/libexec/podman/aardvark-dns
      version: aardvark-dns 1.13.1
    package: netavark-1.13.1-1.fc41.x86_64
    path: /usr/libexec/podman/netavark
    version: netavark 1.13.1
  ociRuntime:
    name: crun
    package: crun-1.19.1-1.fc41.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.fc41.x86_64
    version: |
      pasta 0^20241211.g09478d5-1.fc41.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: /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: true
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.3.1-1.fc41.x86_64
    version: |-
      slirp4netns version 1.3.1
      commit: e5e368c4f5db6ae75c2fce786e31eef9da6bf236
      libslirp: 4.8.0
      SLIRP_CONFIG_VERSION_MAX: 5
      libseccomp: 2.5.5
  swapFree: 8589930496
  swapTotal: 8589930496
  uptime: 11h 16m 31.00s (Approximately 0.46 days)
  variant: ""
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - docker.io
store:
  configFile: /usr/share/containers/storage.conf
  containerStore:
    number: 2
    paused: 0
    running: 2
    stopped: 0
  graphDriverName: overlay
  graphOptions:
    overlay.imagestore: /usr/lib/containers/storage
    overlay.mountopt: nodev,metacopy=on
  graphRoot: /var/lib/containers/storage
  graphRootAllocated: 536854134784
  graphRootUsed: 403665657856
  graphStatus:
    Backing Filesystem: btrfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Supports shifting: "true"
    Supports volatile: "true"
    Using metacopy: "true"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 5
  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: go1.23.3
  Os: linux
  OsArch: linux/amd64
  Version: 5.3.1

Podman in a container

No

Privileged Or Rootless

Privileged

Upstream Latest Release

No

Additional environment details

No response

Additional information

No response

[apollo13]

Note that this only breaks docker-compose since commit docker/compose@c21d4cf which is in v2.31.0, docker-compose 2.30.3 is fine.

[apollo13]

Got a draft PR at #24950