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spinifex/scripts/images/eks-node-gpu/k3s-agent-prestart.sh
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Josh Siviour 6879a3425a feat(gpu): Ubuntu NVIDIA GPU node images + GPU AMI selection (Epic A) (#502)
* feat(gpu): Ubuntu NVIDIA GPU node image + GPU AMI selection

Epic A of GPU passthrough to EKS pods / ECS task containers.

- Add gpu-vendor AMI tag constants + GPUVendorForType/IsGPUTypeName helpers
  (instance-family prefix -> vendor from knownGPUModels).
- EKS + ECS worker AMI resolution branches to a GPU-tagged node image for GPU
  instance types; no fallback to the driverless image (hard error instead).
- Exclude gpu-vendor-tagged AMIs from the plain (non-GPU) lookup so a newer GPU
  AMI cannot hijack ordinary nodes (managed-by tag is shared; filters have no
  negation, so exclude client-side).
- NodegroupRecord caches GPUEnabled/GPUVendor from InstanceTypes.
- Catalog entries spinifex-eks-node-gpu / spinifex-ecs-node-gpu (dual-tagged).
- New Ubuntu 26.04 GPU node images (eks-node-gpu, ecs-agent-gpu): reuse the
  proven DKMS -server driver recipe (drop Docker CE + dev payload), add
  nvidia-container-toolkit, OpenRC->systemd port of the worker/agent service
  subset, udev EBS by-id bridge, nvidia modules-load, first-boot CDI generation.
- build-system-image.sh: SYSTEM_TAG supports multiple space-separated tags.

* build: allow SYSTEM_IMAGE_BUILD_DIR override for image build dir

Ubuntu GPU images are 16G; a RAM-backed /tmp tmpfs is too small to hold the
qcow2 + expanded raw. Default stays /tmp; SYSTEM_IMAGE_BUILD_DIR redirects the
build onto a real disk.
2026-07-10 19:52:12 +10:00

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#!/bin/sh
set -eu
# k3s-agent-prestart — reproduces the start_pre logic from
# scripts/images/eks-node/k3s-agent.initd for the systemd unit: requires
# K3S_URL + K3S_TOKEN from /etc/spinifex-eks/agent.env (sourced by the unit's
# own EnvironmentFile=), then resolves the kubelet provider-id from IMDSv2
# (aws:///<az>/<instance-id>, EKS parity so the AWS Load Balancer Controller
# can resolve nodes for ip-mode target registration) and writes it as an
# extra k3s agent argument for the unit's ExecStart to source.
#
# Run as ExecStartPre=; a nonzero exit here fails k3s-agent.service before k3s
# is ever invoked, same as the OpenRC start_pre returning 1.
ENV_FILE=/etc/spinifex-eks/agent.env
DROPIN=/run/k3s-agent-extra-args.env
LOGTAG="k3s-agent-prestart"
# EnvironmentFile= already injects agent.env into this process' environment,
# but source it directly too so this script also works if invoked standalone.
if [ -f "${ENV_FILE}" ]; then
# shellcheck disable=SC1090
. "${ENV_FILE}"
fi
if [ -z "${K3S_URL:-}" ] || [ -z "${K3S_TOKEN:-}" ]; then
echo "[${LOGTAG}] K3S_URL and K3S_TOKEN must be set in ${ENV_FILE}" >&2
exit 1
fi
IMDS=http://169.254.169.254/latest
CURL="curl -fsS --connect-timeout 3 --max-time 5"
EXTRA_ARGS=""
TOK=$(${CURL} -X PUT -H 'X-aws-ec2-metadata-token-ttl-seconds: 120' "${IMDS}/api/token" 2>/dev/null || true)
if [ -n "${TOK}" ]; then
IID=$(${CURL} -H "X-aws-ec2-metadata-token: ${TOK}" "${IMDS}/meta-data/instance-id" 2>/dev/null || true)
AZ=$(${CURL} -H "X-aws-ec2-metadata-token: ${TOK}" "${IMDS}/meta-data/placement/availability-zone" 2>/dev/null || true)
if [ -n "${IID}" ] && [ -n "${AZ}" ]; then
EXTRA_ARGS="--kubelet-arg=provider-id=aws:///${AZ}/${IID}"
else
echo "[${LOGTAG}] IMDS instance-id/az empty; keeping default providerID" >&2
fi
else
echo "[${LOGTAG}] IMDS token request failed; keeping default providerID" >&2
fi
echo "K3S_AGENT_EXTRA_ARGS=${EXTRA_ARGS}" > "${DROPIN}"