[Release-1.28] - K3s fails to import tarball produced by ctr image export

[brandond]

Backport fix for K3s fails to import tarball produced by ctr image export

• K3s fails to import tarball produced by ctr image export #10132

[mdrahman-suse]

Validation on release-1.28 with commit 9d5becb

Testing

• Steps: K3s fails to import tarball produced by ctr image export #10132 (comment)

Replication

$ k3s -v
k3s version v1.28.10+k3s1 (a4c5612e)
go version go1.21.9

$ sudo journalctl -u k3s | grep nginx-image
Jun 12 23:22:18 k3s[32740]: time="2024-06-12T23:22:18Z" level=info msg="Importing images from /var/lib/rancher/k3s/agent/images/nginx-image.tar"
Jun 12 23:22:21 k3s[32740]: time="2024-06-12T23:22:21Z" level=error msg="Error encountered while importing /var/lib/rancher/k3s/agent/images/nginx-image.tar: failed to import images from /var/lib/rancher/k3s/agent/images/nginx-image.tar: content digest sha256:c36751d7f6324d496c55c7fae626cda3efcc62b11a3b6cfb28d5ae53d8d6fc7a: not found"

$ sudo ctr images ls | grep nginx
$

Validation

$ k3s -v
k3s version v1.28.10+k3s-9d5becb2 (9d5becb2)
go version go1.21.9

$ sudo journalctl -u k3s | grep nginx-image
Jun 12 23:28:09 k3s[35724]: time="2024-06-12T23:28:09Z" level=info msg="Importing images from /var/lib/rancher/k3s/agent/images/nginx-image.tar"
Jun 12 23:28:11 k3s[35724]: time="2024-06-12T23:28:11Z" level=info msg="Imported images from /var/lib/rancher/k3s/agent/images/nginx-image.tar in 1.972364726s"

$ sudo ctr images ls | grep nginx
docker.io/library/nginx:latest
...