Add image for overtaking using direct download to disk

README.md

@@ -35,3 +35,23 @@ ssh root@<ip>
 dmsetup remove root # Close old root cryptsetup mapper if you have that
 systemd-repart --copy-from --dry-run=no --empty=force /run/image.raw /dev/vda
 ```
+
+## Tar based, curl method
+
+If you directly want to deploy an image that's larger than your available memory,
+you can use the following approach, where you upload the image (age encrypted)
+to a remote server and redirect the output through decryption onto the disk.
+
+```bash
+mkosi --image=debian-tar build
+rsync -zP mkosi.output/debian-tar.tar root@ip:/root/
+ssh root@<ip>
+mkdir -p /run/nextroot
+cd /run/nextroot
+tar -xf /local_scratch/image.tar
+cp /etc/ssh/ssh_host_* etc/ssh/
+systemctl soft-reboot
+ssh root@<ip>
+cryptsetup close root # Close old root cryptsetup mapper if you have that
+curl -s https://example.com/mkosi.age | age -d | dd of=/dev/sda bs=4M status=progress
+```

mkosi.images/debian-tar-curl.conf

@@ -0,0 +1,23 @@
+[Distribution]
+Distribution=debian
+Release=sid
+
+[Content]
+Timezone=UTC
+Packages=
+ systemd
+ dbus
+ udev
+ bash
+ ca-certificates
+ openssh-server
+ util-linux
+ util-linux-extra
+ systemd-resolved
+ coreutils
+ cryptsetup
+ curl
+ age
+
+[Output]
+@Format=tar