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Podman Image SCP rootful to rootless transfer

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Added functionality for users to transfer images from root storage to rootless storage without using sshd. This is
done through rootful podman by running `sudo podman image scp root@localhost::image user@localhost:: the user is needed
in order to find and use their uid/gid to exec a new process.

added necessary tests, and functions for this implementation. Created new image function Transfer so that
the underlying code is majorly removed from CLI

Signed-off-by: cdoern <cdoern@redhat.com>
This commit is contained in:
cdoern
2021-08-11 16:14:57 -04:00
committed by cdoern
parent 85bad0cc7c
commit ffa5ed0e0e
7 changed files with 140 additions and 6 deletions
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18
docs/source/markdown/podman-image-scp.1.md
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@ -8,7 +8,7 @@ podman-image-scp - Securely copy an image from one host to another
## DESCRIPTION
**podman image scp** copies container images between hosts on a network. You can load to the remote host or from the remote host as well as in between two remote hosts.
Note: `::` is used to specify the image name depending on if you are saving or loading.
Note: `::` is used to specify the image name depending on if you are saving or loading. Images can also be transferred from rootful to rootless storage on the same machine without using sshd. This feature is not supported on the remote client.
**podman image scp [GLOBAL OPTIONS]**
@ -62,6 +62,22 @@ Storing signatures
Loaded image(s): docker.io/library/alpine:latest
```
```
$ sudo podman image scp root@localhost::alpine username@localhost::
Copying blob e2eb06d8af82 done
Copying config 696d33ca15 done
Writing manifest to image destination
Storing signatures
Run Directory Obtained: /run/user/1000/
[Run Root: /var/tmp/containers-user-1000/containers Graph Root: /root/.local/share/containers/storage DB Path: /root/.local/share/containers/storage/libpod/bolt_state.db]
Getting image source signatures
Copying blob 5eb901baf107 skipped: already exists
Copying config 696d33ca15 done
Writing manifest to image destination
Storing signatures
Loaded image(s): docker.io/library/alpine:latest
```
## SEE ALSO
podman(1), podman-load(1), podman-save(1), podman-remote(1), podman-system-connection-add(1), containers.conf(5), containers-transports(5)