Hi! I am trying to use the new oci-service type and it seems to work
nicely! However I am not able to get it to work with a local OCI
archive. What am I doing wrong? Here is the service:
```scm
(simple-service 'oci-provisioning oci-service-type
(oci-extension
(containers
(list
(oci-container-configuration
(image (oci-image
(repository "localhost/hello")
(value (local-file "/tmp/oci.tar")))))))))
```
And the result:
```
Backtrace:
In srfi/srfi-1.scm:
586:29 19 (map1 (#<<service> type: #<service-type mingetty 7f2…> …))
586:29 18 (map1 (#<<service> type: #<service-type mingetty 7f2…> …))
586:29 17 (map1 (#<<service> type: #<service-type mingetty 7f2…> …))
586:29 16 (map1 (#<<service> type: #<service-type mingetty 7f2…> …))
586:29 15 (map1 (#<<service> type: #<service-type agetty 7f2b3…> …))
586:29 14 (map1 (#<<service> type: #<service-type shepherd-sys…> …))
586:29 13 (map1 (#<<service> type: #<service-type console-font…> …))
586:29 12 (map1 (#<<service> type: #<service-type virtual-term…> …))
586:17 11 (map1 (#<<service> type: #<service-type oci 7f2b3ad1…> …))
In gnu/services/containers.scm:
1500:3 10 (oci-state->shepherd-services #<<oci-state> networks: …> …)
In srfi/srfi-1.scm:
586:17 9 (map1 (#<<oci-container-configuration> user: %unset-ma…>))
In gnu/services/containers.scm:
1317:17 8 (oci-container-shepherd-service _ #<<oci-runtime-state…> …)
1185:17 7 (oci-image-loader #<<oci-runtime-state> runtime: podma…> …)
In ice-9/boot-9.scm:
1752:10 6 (with-exception-handler _ _ #:unwind? _ # _)
In guix/store.scm:
690:37 5 (thunk)
2212:25 4 (run-with-store #<store-connection 256.99 7f2b3acd55a0> …)
2212:25 3 (run-with-store #<store-connection 256.99 7f2b3acd55a0> …)
In ice-9/boot-9.scm:
1685:16 2 (raise-exception _ #:continuable? _)
1685:16 1 (raise-exception _ #:continuable? _)
1685:16 0 (raise-exception _ #:continuable? _)
ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Wrong type to apply: #<<local-file> file: "/tmp/oci.tar" absolute:
#<promise #<procedure 7f5283a56d40 at ice-9/eval.scm:330:13 ()>> name:
"oci.tar" recursive?: #f select?: #<procedure true (file stat)>>
```
According to the manual, the oci-image value field accepts "a gexp or a
file-like object that evaluates to an OCI compatible tarball" and
"local-file ... returns a file-like object".
https://guix.gnu.org/manual/devel/en/html_node/Miscellaneous-Services.html#index-oci_002dimage
https://guix.gnu.org/manual/devel/en/html_node/G_002dExpressions.html#index-gexp_002d_003ederivation
Do I need to specify the local file in a different way?
Here is a full example:
```scm
(define-module (os)
#:use-module (gnu packages file-systems)
#:use-module (gnu services)
#:use-module (gnu services base)
#:use-module (gnu services containers)
#:use-module (gnu services dbus)
#:use-module (gnu services desktop)
#:use-module (gnu bootloader)
#:use-module (gnu bootloader grub)
#:use-module (gnu system)
#:use-module (gnu system accounts)
#:use-module (gnu system file-systems)
#:use-module (gnu system shadow)
#:use-module (guix gexp))
(define-public os
(operating-system
(bootloader (bootloader-configuration
(bootloader grub-bootloader)))
(file-systems (cons (file-system (device "/dev/vda1")
(mount-point "/")
(type "ext4"))
%base-file-systems))
(host-name "test-os")
(locale "en_US.utf8")
(services
(cons*
;; networking service-type omitted
(service elogind-service-type)
(service dbus-root-service-type)
(service rootless-podman-service-type)
(service
oci-service-type
(oci-configuration
(runtime 'podman)
(runtime-extra-arguments
(list
;; This is necessary for running Podman in a `guix system vm`
;; because an overlay is used to share the host store and
;; Linux will not do another overlay on top of that.
#~(string-append "--storage-opt=overlay.mount_program="
#$(file-append fuse-overlayfs
"/bin/fuse-overlayfs"))))
(verbose? #t)))
(simple-service
'oci-provisioning oci-service-type
(oci-extension
(containers
(list
(oci-container-configuration
(image (oci-image
(repository "localhost/hello")
(value (local-file "/tmp/oci.tar")))))))))
%base-services))))
os
```
The OCI archive was created like this:
```sh
podman image pull docker://hello-world
podman image save --format=oci-archive --output=/tmp/oci.tar \
docker.io/library/hello-world
```
Thanks,
Owen
