Timothy J. Aveni
333 lines
9.3 KiB
Bash
Executable File
333 lines
9.3 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
set -euo pipefail
|
|
|
|
aws_region="${AWS_REGION:-us-west-2}"
|
|
system="aarch64-linux"
|
|
builder_instance_type="t4g.large"
|
|
name="nixos-zfs-ec2"
|
|
keep_builder=false
|
|
extra_tofu_args=()
|
|
|
|
usage() {
|
|
cat >&2 <<'EOF'
|
|
Usage: publish-ami.sh [options] [-- <extra tofu apply args>]
|
|
|
|
Options:
|
|
--system <aarch64-linux|x86_64-linux>
|
|
Target NixOS system (default: aarch64-linux)
|
|
--aws-region <region> AWS region (default: AWS_REGION or us-west-2)
|
|
--builder-instance-type <t> Temporary builder EC2 type (default: t4g.large)
|
|
--name <name> AMI name prefix
|
|
--keep-builder Keep temporary builder resources after publish
|
|
-h, --help Show this help
|
|
|
|
Any arguments after `--` are passed through to `tofu apply`.
|
|
Use that for values like:
|
|
|
|
-- -var base_nixos_ami_id=ami-... -var subnet_id=subnet-...
|
|
EOF
|
|
}
|
|
|
|
while [ "$#" -gt 0 ]; do
|
|
case "$1" in
|
|
--system)
|
|
system="$2"
|
|
shift 2
|
|
;;
|
|
--aws-region)
|
|
aws_region="$2"
|
|
shift 2
|
|
;;
|
|
--builder-instance-type)
|
|
builder_instance_type="$2"
|
|
shift 2
|
|
;;
|
|
--name)
|
|
name="$2"
|
|
shift 2
|
|
;;
|
|
--keep-builder)
|
|
keep_builder=true
|
|
shift
|
|
;;
|
|
--)
|
|
shift
|
|
extra_tofu_args=("$@")
|
|
break
|
|
;;
|
|
-h|--help)
|
|
usage
|
|
exit 0
|
|
;;
|
|
*)
|
|
echo "Unknown argument: $1" >&2
|
|
usage
|
|
exit 1
|
|
;;
|
|
esac
|
|
done
|
|
|
|
case "$system" in
|
|
aarch64-linux)
|
|
architecture="arm64"
|
|
;;
|
|
x86_64-linux)
|
|
architecture="x86_64"
|
|
;;
|
|
*)
|
|
echo "Unsupported system: $system" >&2
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
require() {
|
|
if ! command -v "$1" >/dev/null 2>&1; then
|
|
echo "Missing required command: $1" >&2
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
require aws
|
|
require git
|
|
require jq
|
|
require sha256sum
|
|
require tofu
|
|
|
|
repo_root="$(git rev-parse --show-toplevel)"
|
|
if ! git diff --quiet || ! git diff --cached --quiet; then
|
|
echo "The AMI builder git tree must be clean before publishing." >&2
|
|
exit 1
|
|
fi
|
|
|
|
builder_git_rev="$(git rev-parse HEAD)"
|
|
flake_lock_rev="$(jq -r '.nodes.nixpkgs.locked.rev // .nodes.nixpkgs.locked.narHash // "unknown"' "$repo_root/flake.lock")"
|
|
input_hash="$(printf '%s\n%s\n%s\n' "$builder_git_rev" "$flake_lock_rev" "$system" | sha256sum | awk '{ print $1 }')"
|
|
ami_name="${name}-${architecture}-${input_hash:0:12}"
|
|
|
|
tofu init
|
|
tofu apply \
|
|
-var "aws_region=$aws_region" \
|
|
-var "name=$name" \
|
|
-var "system=$system" \
|
|
-var "builder_instance_type=$builder_instance_type" \
|
|
-var "input_hash=$input_hash" \
|
|
-var "builder_git_rev=$builder_git_rev" \
|
|
-var "flake_lock_rev=$flake_lock_rev" \
|
|
"${extra_tofu_args[@]}"
|
|
|
|
builder_instance_id="$(tofu output -raw builder_instance_id)"
|
|
nix_volume_id="$(tofu output -raw nix_volume_id)"
|
|
nix_device_name="$(tofu output -raw nix_device_name)"
|
|
nix_pool="$(tofu output -raw nix_pool)"
|
|
|
|
echo "Waiting for builder instance to stop: $builder_instance_id" >&2
|
|
aws ec2 wait instance-stopped --region "$aws_region" --instance-ids "$builder_instance_id"
|
|
|
|
capture_image_id="$(
|
|
aws ec2 create-image \
|
|
--region "$aws_region" \
|
|
--instance-id "$builder_instance_id" \
|
|
--name "${ami_name}-capture" \
|
|
--description "Temporary capture for ${ami_name}" \
|
|
--no-reboot \
|
|
--tag-specifications "ResourceType=image,Tags=[{Key=Name,Value=${ami_name}-capture},{Key=Project,Value=${name}},{Key=Role,Value=ami-capture},{Key=InputHash,Value=${input_hash}}]" \
|
|
--query ImageId \
|
|
--output text
|
|
)"
|
|
|
|
aws ec2 wait image-available --region "$aws_region" --image-ids "$capture_image_id"
|
|
|
|
capture_image_json="$(aws ec2 describe-images --region "$aws_region" --image-ids "$capture_image_id")"
|
|
root_snapshot_id="$(
|
|
jq -r --arg nixDevice "$nix_device_name" '
|
|
.Images[0].BlockDeviceMappings[]
|
|
| select(.DeviceName != $nixDevice and .Ebs != null)
|
|
| .Ebs.SnapshotId
|
|
' <<<"$capture_image_json" | head -n 1
|
|
)"
|
|
root_device_name="$(
|
|
jq -r --arg nixDevice "$nix_device_name" '
|
|
.Images[0].BlockDeviceMappings[]
|
|
| select(.DeviceName != $nixDevice and .Ebs != null)
|
|
| .DeviceName
|
|
' <<<"$capture_image_json" | head -n 1
|
|
)"
|
|
root_volume_size="$(
|
|
jq -r --arg device "$root_device_name" '
|
|
.Images[0].BlockDeviceMappings[]
|
|
| select(.DeviceName == $device)
|
|
| .Ebs.VolumeSize
|
|
' <<<"$capture_image_json"
|
|
)"
|
|
nix_snapshot_id="$(
|
|
jq -r --arg device "$nix_device_name" '
|
|
.Images[0].BlockDeviceMappings[]
|
|
| select(.DeviceName == $device)
|
|
| .Ebs.SnapshotId
|
|
' <<<"$capture_image_json"
|
|
)"
|
|
nix_volume_size="$(
|
|
jq -r --arg device "$nix_device_name" '
|
|
.Images[0].BlockDeviceMappings[]
|
|
| select(.DeviceName == $device)
|
|
| .Ebs.VolumeSize
|
|
' <<<"$capture_image_json"
|
|
)"
|
|
|
|
if [ -z "$root_snapshot_id" ] || [ "$root_snapshot_id" = "null" ]; then
|
|
echo "Unable to determine root snapshot for $capture_image_id" >&2
|
|
exit 1
|
|
fi
|
|
|
|
if [ -z "$nix_snapshot_id" ] || [ "$nix_snapshot_id" = "null" ]; then
|
|
echo "Unable to determine /nix snapshot for $capture_image_id" >&2
|
|
exit 1
|
|
fi
|
|
|
|
block_device_mappings="$(
|
|
jq -n \
|
|
--arg rootDevice "$root_device_name" \
|
|
--arg rootSnapshot "$root_snapshot_id" \
|
|
--argjson rootSize "$root_volume_size" \
|
|
--arg nixDevice "$nix_device_name" \
|
|
--arg nixSnapshot "$nix_snapshot_id" \
|
|
--argjson nixSize "$nix_volume_size" \
|
|
'[
|
|
{
|
|
DeviceName: $rootDevice,
|
|
Ebs: {
|
|
SnapshotId: $rootSnapshot,
|
|
VolumeSize: $rootSize,
|
|
VolumeType: "gp3",
|
|
DeleteOnTermination: true
|
|
}
|
|
},
|
|
{
|
|
DeviceName: $nixDevice,
|
|
Ebs: {
|
|
SnapshotId: $nixSnapshot,
|
|
VolumeSize: $nixSize,
|
|
VolumeType: "gp3",
|
|
DeleteOnTermination: true
|
|
}
|
|
}
|
|
]'
|
|
)"
|
|
|
|
image_id="$(
|
|
aws ec2 register-image \
|
|
--region "$aws_region" \
|
|
--name "$ami_name" \
|
|
--description "NixOS EC2 AMI with matched root and ZFS /nix snapshots" \
|
|
--architecture "$architecture" \
|
|
--virtualization-type hvm \
|
|
--root-device-name "$root_device_name" \
|
|
--ena-support \
|
|
--block-device-mappings "$block_device_mappings" \
|
|
--query ImageId \
|
|
--output text
|
|
)"
|
|
|
|
aws ec2 wait image-available --region "$aws_region" --image-ids "$image_id"
|
|
|
|
aws ec2 create-tags \
|
|
--region "$aws_region" \
|
|
--resources "$root_snapshot_id" \
|
|
--tags \
|
|
"Key=Name,Value=${ami_name}-root" \
|
|
"Key=Project,Value=${name}" \
|
|
"Key=Architecture,Value=${architecture}" \
|
|
"Key=System,Value=${system}" \
|
|
"Key=InputHash,Value=${input_hash}" \
|
|
"Key=BuilderGitRev,Value=${builder_git_rev}" \
|
|
"Key=FlakeLockRev,Value=${flake_lock_rev}"
|
|
|
|
aws ec2 create-tags \
|
|
--region "$aws_region" \
|
|
--resources "$nix_snapshot_id" "$nix_volume_id" \
|
|
--tags \
|
|
"Key=Name,Value=${ami_name}-nix" \
|
|
"Key=Project,Value=${name}" \
|
|
"Key=Architecture,Value=${architecture}" \
|
|
"Key=System,Value=${system}" \
|
|
"Key=InputHash,Value=${input_hash}" \
|
|
"Key=BuilderGitRev,Value=${builder_git_rev}" \
|
|
"Key=FlakeLockRev,Value=${flake_lock_rev}" \
|
|
"Key=NixPool,Value=${nix_pool}"
|
|
|
|
aws ec2 create-tags \
|
|
--region "$aws_region" \
|
|
--resources "$image_id" \
|
|
--tags \
|
|
"Key=Name,Value=${ami_name}" \
|
|
"Key=Project,Value=${name}" \
|
|
"Key=Role,Value=published-ami" \
|
|
"Key=Architecture,Value=${architecture}" \
|
|
"Key=System,Value=${system}" \
|
|
"Key=InputHash,Value=${input_hash}" \
|
|
"Key=BuilderGitRev,Value=${builder_git_rev}" \
|
|
"Key=FlakeLockRev,Value=${flake_lock_rev}" \
|
|
"Key=NixPool,Value=${nix_pool}" \
|
|
"Key=RootSnapshotId,Value=${root_snapshot_id}" \
|
|
"Key=NixSnapshotId,Value=${nix_snapshot_id}"
|
|
|
|
ssm_ami_prefix="/quixos/amis/${name}/${architecture}"
|
|
for ssm_ami_parameter_name in \
|
|
"${ssm_ami_prefix}/recommended" \
|
|
"${ssm_ami_prefix}/by-builder-rev/${builder_git_rev}" \
|
|
"${ssm_ami_prefix}/by-input-hash/${input_hash}"
|
|
do
|
|
aws ssm put-parameter \
|
|
--region "$aws_region" \
|
|
--name "$ssm_ami_parameter_name" \
|
|
--type String \
|
|
--value "$image_id" \
|
|
--overwrite >/dev/null
|
|
done
|
|
|
|
aws ec2 deregister-image --region "$aws_region" --image-id "$capture_image_id" >/dev/null
|
|
|
|
jq -n \
|
|
--arg architecture "$architecture" \
|
|
--arg system "$system" \
|
|
--arg inputHash "$input_hash" \
|
|
--arg builderGitRev "$builder_git_rev" \
|
|
--arg flakeLockRev "$flake_lock_rev" \
|
|
--arg amiId "$image_id" \
|
|
--arg rootSnapshotId "$root_snapshot_id" \
|
|
--arg nixSnapshotId "$nix_snapshot_id" \
|
|
--arg rootDeviceName "$root_device_name" \
|
|
--arg nixDeviceName "$nix_device_name" \
|
|
--arg nixPool "$nix_pool" \
|
|
--arg ssmRecommendedParameter "${ssm_ami_prefix}/recommended" \
|
|
'{
|
|
architecture: $architecture,
|
|
system: $system,
|
|
inputHash: $inputHash,
|
|
builderGitRev: $builderGitRev,
|
|
flakeLockRev: $flakeLockRev,
|
|
amiId: $amiId,
|
|
rootSnapshotId: $rootSnapshotId,
|
|
nixSnapshotId: $nixSnapshotId,
|
|
rootDeviceName: $rootDeviceName,
|
|
nixDeviceName: $nixDeviceName,
|
|
nixPool: $nixPool,
|
|
ssmRecommendedParameter: $ssmRecommendedParameter
|
|
}' > artifact.json
|
|
|
|
if [ "$keep_builder" = false ]; then
|
|
tofu destroy \
|
|
-auto-approve \
|
|
-var "aws_region=$aws_region" \
|
|
-var "name=$name" \
|
|
-var "system=$system" \
|
|
-var "builder_instance_type=$builder_instance_type" \
|
|
-var "input_hash=$input_hash" \
|
|
-var "builder_git_rev=$builder_git_rev" \
|
|
-var "flake_lock_rev=$flake_lock_rev" \
|
|
"${extra_tofu_args[@]}"
|
|
fi
|
|
|
|
echo "Published AMI: $image_id"
|
|
echo "Published SSM parameter: ${ssm_ami_prefix}/recommended"
|