Dockerfile for Ubuntu 22.04 without FIPS for building an iso image using auroraboot

[SSWAMIN1SSS]

Trying to create an ISO Image from Docker file for Ubuntu 22.04.
Used the Dockerfile for Ubuntu from this link:
https://github.com/kairos-io/kairos/blob/master/images/Dockerfile.ubuntu
While trying to build Observed the following Error, as per the instructions it should get automatically populated with docker whereas its not getting updated.
"Step 12/66 : FROM ${TARGETARCH} AS base-20-lts
base name (${TARGETARCH}) should not be blank"
Could anyone please help in getting an Dockerfile for Ubuntu 22.04 / Ubuntu-22 LTS

[Itxaka]

Hi @SSWAMIN1SSS !

Are you using docker with buildx? https://docs.docker.com/engine/reference/commandline/buildx_build/

I think that by default the normal build process of docker does not set the TARGETARCH value as it can only build for one arch. Using buildx enables multiarch bulding and that variable and other are set automatically in the build process.

[SSWAMIN1SSS]

Hi @Itxaka

We tried using it but got the following error:

[SSWAMIN1SSS]

Hi @Itxaka
We tried it but got the following error:

Any workaround to resolve it.

[Itxaka]

no idea, that seems an OS install error coming from ubuntu and its repos directly.

I would follow up docker install intructions for ubuntu in their official page as that installs the buildx plugin as well: https://docs.docker.com/engine/install/ubuntu/