$ octool
Toolchain for OpenContainer Format(OCI)

Usage:
  octool [command]

Available Commands:
  import         Imports container image from remote registery and convert it to runc's rootfs
  lint           validate container config file(s)
  spec           genrates runc compatible spec from manifest file
  validate-state Validates the Container state

Flags:
  -h, --help   help for octool

Use "octool [command] --help" for more information about a command.

$ octool import docker://kunalkushwaha/demoapp_image:v1 -t demoapp
rootfs is prepared at : demoapp/rootfs

$ cd demoapp

$ tree -L 2
.
├── config.json
├── manifest.json
└── rootfs
    ├── bin
    ├── dev
    ├── etc
    ├── home
    ├── lib
    ├── linuxrc -> /bin/busybox
    ├── media
    ├── mnt
    ├── proc
    ├── root
    ├── run
    ├── sbin
    ├── srv
    ├── sys
    ├── tmp
    ├── usr
    └── var

17 directories, 3 files

$ octool spec

Succesfully generated config.json

$ octool lint    

Config is Valid OCI

$ cd demoapp

$ sudo runc run test
/ # ls
bin      etc      lib      media    proc     run      srv      tmp      var
dev      home     linuxrc  mnt      root     sbin     sys      usr