constellation/README.md at fa6dfdff4f4eb6db8e9ac4165a761fa88ce14b61

mirror of https://github.com/edgelesssys/constellation.git synced 2024-10-01 01:36:09 -04:00

* Add production secure boot keys
* Refactor OS build and upload settings

2022-11-04 16:48:52 +01:00

7.2 KiB

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Setup

Install mkosi (from git):

cd /tmp/
git clone https://github.com/systemd/mkosi
cd mkosi
tools/generate-zipapp.sh
cp builddir/mkosi /usr/local/bin/

Install tools:

Ubuntu / Debian

sudo apt-get update
sudo apt-get install --assume-yes --no-install-recommends \
    dnf \
    systemd-container \
    qemu-system-x86 \
    qemu-utils \
    ovmf \
    e2fsprogs \
    squashfs-tools \
    efitools \
    sbsigntool \
    coreutils \
    curl \
    jq \
    util-linux \
    virt-manager \
    python3-crc32c \
    rpm

Fedora

sudo dnf install -y \
    edk2-ovmf \
    systemd-container \
    qemu \
    e2fsprogs \
    squashfs-tools \
    efitools \
    sbsigntools \
    coreutils \
    curl \
    jq \
    util-linux \
    virt-manager

Prepare secure boot PKI (see secure-boot/genkeys.sh)

Build

When building your first image, prepare the secure boot PKI (see secure-boot/genkeys.sh) for self-signed, locally built images.

After that, you can build the image with:

# OPTIONAL: to create a debug image, export the following line
# export BOOTSTRAPPER_BINARY=$(realpath ${PWD}/../../build/debugd)
# OPTIONAL: symlink custom path to secure boot PKI to ./pki
# ln -s /path/to/pki/folder ./pki
sudo make -j $(nproc)

Raw images will be placed in mkosi.output.<CSP>/fedora~36/image.raw.

Prepare Secure Boot

The generated images are partially signed by Microsoft (shim loader), and partially signed by Edgeless Systems (systemd-boot and unified kernel images consisting of the linux kernel, initramfs and kernel commandline).

For QEMU and Azure, you can pre-generate the NVRAM variables for secure boot. This is not necessary for GCP, as you can specify secure boot parameters via the GCP API on image creation.

libvirt / QEMU / KVM

secure-boot/generate_nvram_vars.sh mkosi.output.qemu/fedora~36/image.raw

Azure

These steps only have to performed once for a fresh set of secure boot certificates. VMGS blobs for testing and release images already exist.

First, create a disk without embedded MOK EFI variables.

# set these variables
export AZURE_SECURITY_TYPE=ConfidentialVM # or TrustedLaunch
export AZURE_RESOURCE_GROUP_NAME= # e.g. "constellation-images"

export AZURE_REGION=northeurope
export AZURE_REPLICATION_REGIONS=
export AZURE_DISK_NAME=constellation-$(date +%s)
export AZURE_SNAPSHOT_NAME=${AZURE_DISK_NAME}
export AZURE_RAW_IMAGE_PATH=${PWD}/mkosi.output.azure/fedora~36/image.raw
export AZURE_IMAGE_PATH=${PWD}/mkosi.output.azure/fedora~36/image.vhd
export AZURE_VMGS_FILENAME=${AZURE_SECURITY_TYPE}.vmgs
export BLOBS_DIR=${PWD}/blobs
upload/pack.sh azure "${AZURE_RAW_IMAGE_PATH}" "${AZURE_IMAGE_PATH}"
upload/upload_azure.sh --disk-name "${AZURE_DISK_NAME}-setup-secure-boot" ""
secure-boot/azure/launch.sh -n "${AZURE_DISK_NAME}-setup-secure-boot" -d --secure-boot true --disk-name "${AZURE_DISK_NAME}-setup-secure-boot"

Ignore the running launch script and connect to the serial console once available. The console shows the message "Verification failed: (0x1A) Security Violation". You can import the MOK certificate via the UEFI shell:

Press OK, then ENTER, then "Enroll key from disk". Select the following key: /EFI/loader/keys/auto/db.cer. Press Continue, then choose "Yes" to the question "Enroll the key(s)?". Choose reboot.

Extract the VMGS from the running VM (this includes the MOK EFI variables) and delete the VM:

secure-boot/azure/extract_vmgs.sh --name "${AZURE_DISK_NAME}-setup-secure-boot"
secure-boot/azure/delete.sh --name "${AZURE_DISK_NAME}-setup-secure-boot"

Upload to CSP

AWS

Install aws cli (see here)
Login to AWS (see here)
Choose secure boot PKI public keys (one of pki_dev, pki_test, pki_prod)
- pki_dev can be used for local image builds
- pki_test is used by the CI for non-release images
- pki_prod is used for release images

# set these variables
export AWS_IMAGE_NAME= # e.g. "constellation-v1.0.0"
export PKI=${PWD}/pki

export AWS_REGION=eu-central-1
export AWS_REPLICATION_REGIONS="us-east-2"
export AWS_BUCKET=constellation-images
export AWS_EFIVARS_PATH=${PWD}/mkosi.output.aws/fedora~36/efivars.bin
export AWS_IMAGE_PATH=${PWD}/mkosi.output.aws/fedora~36/image.raw
export AWS_IMAGE_FILENAME=image-$(date +%s).raw
export AWS_AMI_OUTPUT=${PWD}/mkosi.output.aws/fedora~36/ami.txt
secure-boot/aws/create_uefivars.sh "${AWS_EFIVARS_PATH}"
upload/upload_aws.sh "${AWS_AMI_OUTPUT}"

GCP

Install gcloud and gsutil (see here)
Login to GCP (see here)
Choose secure boot PKI public keys (one of pki_dev, pki_test, pki_prod)
- pki_dev can be used for local image builds
- pki_test is used by the CI for non-release images
- pki_prod is used for release images

# set these variables
export GCP_IMAGE_FAMILY= # e.g. "constellation"
export GCP_IMAGE_NAME= # e.g. "constellation-v1.0.0"
export PKI=${PWD}/pki

export GCP_PROJECT=constellation-images
export GCP_REGION=europe-west3
export GCP_BUCKET=constellation-images
export GCP_RAW_IMAGE_PATH=${PWD}/mkosi.output.gcp/fedora~36/image.raw
export GCP_IMAGE_FILENAME=$(date +%s).tar.gz
export GCP_IMAGE_PATH=${PWD}/mkosi.output.gcp/fedora~36/image.tar.gz
upload/pack.sh gcp ${GCP_RAW_IMAGE_PATH} ${GCP_IMAGE_PATH}
upload/upload_gcp.sh