github.com/stackdocker/rkt@v0.10.1-0.20151109095037-1aa827478248/Documentation/subcommands/prepare.md (about)

     1  # rkt prepare
     2  
     3  rkt can prepare images to run in a pod. This means it will fetch (if necessary) the images, extract them in its internal tree store, and allocate a pod UUID. If overlay fs is not supported or disabled, it will also copy the tree in the pod rootfs.
     4  
     5  In this way, the pod is ready to be launched immediately by the [run-prepared](run-prepared.md) command.
     6  
     7  Running `rkt prepare` + `rkt run-prepared` is semantically equivalent to running [rkt run](run.md).
     8  Therefore, the supported arguments are mostly the same as in `run` except runtime arguments like `--interactive` or `--mds-register`.
     9  
    10  ## Example
    11  
    12  ```
    13  # rkt prepare coreos.com/etcd:v2.0.10
    14  rkt prepare coreos.com/etcd:v2.0.10
    15  rkt: using image from local store for image name coreos.com/rkt/stage1-coreos:0.10.0
    16  rkt: searching for app image coreos.com/etcd:v2.0.10
    17  rkt: remote fetching from url https://github.com/coreos/etcd/releases/download/v2.0.10/etcd-v2.0.10-linux-amd64.aci
    18  prefix: "coreos.com/etcd"
    19  key: "https://coreos.com/dist/pubkeys/aci-pubkeys.gpg"
    20  gpg key fingerprint is: 8B86 DE38 890D DB72 9186  7B02 5210 BD88 8818 2190
    21  	CoreOS ACI Builder <release@coreos.com>
    22  Key "https://coreos.com/dist/pubkeys/aci-pubkeys.gpg" already in the keystore
    23  Downloading signature from https://github.com/coreos/etcd/releases/download/v2.0.10/etcd-v2.0.10-linux-amd64.aci.asc
    24  Downloading signature: [=======================================] 819 B/819 B
    25  Downloading ACI: [=============================================] 3.79 MB/3.79 MB
    26  rkt: signature verified:
    27    CoreOS ACI Builder <release@coreos.com>
    28  c9fad0e6-8236-4fc2-ad17-55d0a4c7d742
    29  ```