Stats response has "Id" field instead of "id"

[kierendavies]

Issue Description

The stats API JSON response is inconsistent with Docker, because it incorrectly capitalises the "id" field. I discovered this when using the Rust crate Bollard, which reported that the "id" field was missing.

Steps to reproduce the issue

curl  --unix-socket /var/run/docker.sock "http://d/containers/$SOME_CONTAINER_ID/stats"
# {...,"id":"...",...}

curl --unix-socket /run/user/1000/podman/podman.sock "http://d/containers/$SOME_CONTAINER_ID/stats"
# {...,"Id":"...",...}

Describe the results you received

JSON response contains "Id" field, but no "id".

Describe the results you expected

JSON response should contain "id" field.

podman info output

host:
  arch: amd64
  buildahVersion: 1.29.0
  cgroupControllers:
  - cpu
  - memory
  - pids
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: /usr/bin/conmon is owned by conmon 1:2.1.7-1
    path: /usr/bin/conmon
    version: 'conmon version 2.1.7, commit: f633919178f6c8ee4fb41b848a056ec33f8d707d'
  cpuUtilization:
    idlePercent: 79.35
    systemPercent: 5.16
    userPercent: 15.48
  cpus: 8
  distribution:
    distribution: arch
    version: unknown
  eventLogger: journald
  hostname: REDACTED
  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: 6.2.6-arch1-1
  linkmode: dynamic
  logDriver: journald
  memFree: 813850624
  memTotal: 24844115968
  networkBackend: netavark
  ociRuntime:
    name: crun
    package: /usr/bin/crun is owned by crun 1.8.1-1
    path: /usr/bin/crun
    version: |-
      crun version 1.8.1
      commit: f8a096be060b22ccd3d5f3ebe44108517fbf6c30
      rundir: /run/user/1000/crun
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +YAJL
  os: linux
  remoteSocket:
    exists: true
    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: /etc/containers/seccomp.json
    selinuxEnabled: false
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: /usr/bin/slirp4netns is owned by slirp4netns 1.2.0-1
    version: |-
      slirp4netns version 1.2.0
      commit: 656041d45cfca7a4176f6b7eed9e4fe6c11e8383
      libslirp: 4.7.0
      SLIRP_CONFIG_VERSION_MAX: 4
      libseccomp: 2.5.4
  swapFree: 34215489536
  swapTotal: 34359734272
  uptime: 140h 28m 48.00s (Approximately 5.83 days)
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  volume:
  - local
registries: {}
store:
  configFile: /home/REDACTED/.config/containers/storage.conf
  containerStore:
    number: 8
    paused: 0
    running: 8
    stopped: 0
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /home/REDACTED/.local/share/containers/storage
  graphRootAllocated: 476673212416
  graphRootUsed: 276004855808
  graphStatus:
    Backing Filesystem: f2fs
    Native Overlay Diff: "true"
    Supports d_type: "true"
    Using metacopy: "false"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 202
  runRoot: /run/user/1000/containers
  transientStore: false
  volumePath: /home/REDACTED/.local/share/containers/storage/volumes
version:
  APIVersion: 4.4.2
  Built: 1677255177
  BuiltTime: Fri Feb 24 17:12:57 2023
  GitCommit: 74afe26887f814d1c39925a1624851ef3590e79c-dirty
  GoVersion: go1.20.1
  Os: linux
  OsArch: linux/amd64
  Version: 4.4.2

Podman in a container

No

Privileged Or Rootless

Rootless

Upstream Latest Release

Yes

Additional environment details

No response

Additional information

No response