docker imager create custom talos image failed on ubuntu 20.04

[rfakit]

imager will fail on error mounting "/dev/loop5p3" on Ubuntu 20.04

Description

I create an Azure pipeline to create a Talos custom image and push it to Vsphere. we have an Ubuntu 2004 agent runner. in the stage when it tries to build an image with docker imager on

docker run --rm -i \
                -v $config_dir:/secureboot:ro \
                -v $config_dir:/out \
                -v /dev:/dev \
                --privileged \
                "ghcr.io/siderolabs/imager:$talos_version_tag" - < "$config_dir/talos-$talos_version.yml"

does it use a special mount option that requires a new version of the kernel or packages??

Logs

error (1).txt

Environment

I have Ubuntu 20.04 with updated packages of "parted util-linux dosfstools xfsprogs kmod " kernel version Linux ubuntu20 5.4.0-169-generic.
it works on Ubuntu 22.04

• Talos version: v1.7.1 and v1.7.2

[rfakit]

this is my azure pipeline job

    jobs:
      - job: CreateCustomImageJob
        displayName: 'Build and Deploy Talos Image'
        steps:
          - checkout: none
          - script: |
              set -exuo pipefail

              export TF_VAR_vsphere_talos_template="talos-$(TALOS_VERSION)-template"
              export TF_VAR_vsphere_datastore="$(VSPHERE_DATASTORE)"
              export GOVC_INSECURE='1'
              export GOVC_URL="https://$(VSPHERE_SERVER)/sdk"
              export GOVC_USERNAME="$(VSPHERE_USERNAME)"
              export GOVC_PASSWORD="$(VSPHERE_PASSWORD)"
              export TF_VAR_vsphere_datacenter="$(VSPHERE_DATACENTER)"
              export talos_version=$(TALOS_VERSION)
              export talos_vmtoolsd_extension_version="0.5.0"
              export talos_drbd_extension_version="9.2.8"
              export talos_iscsi_extension_version="v0.1.4"
              export talos_util_linux_tools_extension_version="2.39.3"
              export talos_version_tag="v$talos_version"

              # Create Talos configuration
              config_dir="$PWD/tmp/talos"
              rm -rf $config_dir
              mkdir -p $config_dir

              cat << EOF > "$config_dir/talos-$talos_version.yml"
              arch: amd64
              platform: vmware
              secureboot: false
              version: $talos_version_tag
              customization:
                extraKernelArgs:
                  - net.ifnames=0
              input:
                kernel:
                  path: /usr/install/amd64/vmlinuz
                initramfs:
                  path: /usr/install/amd64/initramfs.xz
                baseInstaller:
                  imageRef: ghcr.io/siderolabs/installer:$talos_version_tag
                systemExtensions:
                  - imageRef: ghcr.io/siderolabs/util-linux-tools:$talos_util_linux_tools_extension_version
                  - imageRef: ghcr.io/siderolabs/iscsi-tools:$talos_iscsi_extension_version
                  - imageRef: ghcr.io/siderolabs/talos-vmtoolsd:$talos_vmtoolsd_extension_version
                  - imageRef: ghcr.io/siderolabs/drbd:$talos_drbd_extension_version-v$talos_version
              output:
                kind: image
                imageOptions:
                  diskSize: 2147483648
                  diskFormat: ova
                outFormat: raw
              EOF

              cat "$config_dir/talos-$talos_version.yml"
              lsb_release -a
              # Build Talos image
              docker run --rm -i \
                -v $config_dir:/secureboot:ro \
                -v $config_dir:/out \
                -v /dev:/dev \
                --privileged \
                "ghcr.io/siderolabs/imager:$talos_version_tag" - < "$config_dir/talos-$talos_version.yml"


              # Move and import Talos image to vSphere
              ova_path="$config_dir/talos-$talos_version-vmware-amd64.ova"
              mv $config_dir/vmware-amd64.ova $ova_path

              govc import.spec $ova_path \
                | jq --arg network "$VSPHERE_NETWORK" '.NetworkMapping[0].Network = $network' \
                > $config_dir/talos-$talos_version-vmware-amd64.ova.json

              govc import.ova \
                -ds $TF_VAR_vsphere_datastore \
                -folder "//$TF_VAR_vsphere_datacenter/vm/$(dirname $TF_VAR_vsphere_talos_template)" \
                -name "$(basename $TF_VAR_vsphere_talos_template)" \
                -options $config_dir/talos-$talos_version-vmware-amd64.ova.json \
                $ova_path

              # Configure and finalize Talos VM
              vm_ipath="//$TF_VAR_vsphere_datacenter/vm/$TF_VAR_vsphere_talos_template"
              govc vm.upgrade -vm.ipath "$vm_ipath"
              govc vm.change -vm.ipath "$vm_ipath" \
                -g other6xLinux64Guest \
                -e disk.enableUUID=TRUE
              govc device.boot -vm.ipath "$vm_ipath" \
                -firmware efi \
                -secure=false
              govc vm.info -vm.ipath "$vm_ipath" -json > $config_dir/talos-$talos_version-amd64.json
              govc vm.markastemplate -vm.ipath "$vm_ipath"

[rfakit]

dmesg | grep loop

[12987550.077101] XFS (loop7p3): Superblock has unknown read-only compatible features (0x8) enabled.
[12987550.077223] XFS (loop7p3): Attempted to mount read-only compatible filesystem read-write.
[12987550.077224] XFS (loop7p3): Filesystem can only be safely mounted read only.
[12987550.077232] XFS (loop7p3): SB validate failed with error -22.

[smira]

Looks like your Linux kernel on Ubuntu 20.04 is incompatible with the newer xfs options used by Talos, unfortunately we can't provide a workaround here. You need to use newer kernel release, or run in a VM which has newer kernel.

You can also use Image Factory.