Podman: `podman inspect -t container --size myctr` not working

[TomSweeneyRedHat]

/kind bug

Description

The --size option in a command like:

podman inspect -t container --size myctr

is being ignored. Instead of just the size being returned, the whole inspect output is instead shown.

Steps to reproduce the issue:

1. podman pull alpine

2. podman run --name=myctr alpine ls /etc/network

3. podman inspect --size -t container myctr

Describe the results you received:

Full inspect output of the container showing all fields and values.

Describe the results you expected:

Just the size of the container per the man page.

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

Output of podman version:

# podman version
Version:            1.6.2
RemoteAPI Version:  1
Go Version:         go1.13.1
OS/Arch:            linux/amd64

Output of podman info --debug:

# podman version
Version:            1.6.2
RemoteAPI Version:  1
Go Version:         go1.13.1
OS/Arch:            linux/amd64
[root@localhost ~]# podman info --debug
debug:
  compiler: gc
  git commit: ""
  go version: go1.13.1
  podman version: 1.6.2
host:
  BuildahVersion: 1.11.3
  CgroupVersion: v2
  Conmon:
    package: conmon-2.0.2-1.fc31.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.2, commit: 186a550ba0866ce799d74006dab97969a2107979'
  Distribution:
    distribution: fedora
    version: "31"
  MemFree: 1194172416
  MemTotal: 2083917824
  OCIRuntime:
    name: crun
    package: crun-0.10.6-1.fc31.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 0.10.6
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +YAJL
  SwapFree: 2147479552
  SwapTotal: 2147479552
  arch: amd64
  cpus: 1
  eventlogger: journald
  hostname: localhost.localdomain
  kernel: 5.3.16-300.fc31.x86_64
  os: linux
  rootless: false
  uptime: 4h 19m 2.13s (Approximately 0.17 days)
registries:
  blocked: null
  insecure: null
  search:
  - docker.io
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - registry.centos.org
  - quay.io
store:
  ConfigFile: /etc/containers/storage.conf
  ContainerStore:
    number: 1
  GraphDriverName: overlay
  GraphOptions:
    overlay.mountopt: nodev,metacopy=on
  GraphRoot: /var/lib/containers/storage
  GraphStatus:
    Backing Filesystem: xfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "true"
  ImageStore:
    number: 1
  RunRoot: /var/run/containers/storage
  VolumePath: /var/lib/containers/storage/volumes

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

# rpm -q podman
podman-1.6.2-2.fc31.x86_64

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

[mheon]

I think we expect --size to show everything plus size - if size is being shown, it should be working right. I think you need a --format to get just the size.

[TomSweeneyRedHat]

If size is being shown, I'm losing it in all of the output and I'm not gronking it with grep:

 podman inspect --size -t container myctr | grep ize
        "SizeRootFs": 5591300,
            "ShmSize": 65536000,
            "ConsoleSize": [

[mheon]

Hm. I'll take a look

[NevilleC]

If this issue is still available, I am happy to take it too.

But when reading the comments and the issue description, I get confused:
do we want to display all the fields + the size or only the size?

[TomSweeneyRedHat]

@NevilleC the man page says:

–size, -s

Display the total file size if the type is a container

So in my book, we should only display the size of the container. I'll let @mheon correct that if necessary, and then we may need to also adjust the man page too. @NevilleC I've assigned the issue to you, thanks for hopping on to it!

[mheon]

Per Docker, we should display the full output of inspect per usual, but actually populate the SizeRw and SizeRootFs fields (which are otherwise always 0)