unsloth/docker/build.sh
2026-07-19 15:32:20 +00:00

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#!/usr/bin/env bash
# Build the unsloth-blackwell image on this B200 host (or any Linux host with Docker).
# The build host's GPU is NOT used -- nvcc cross-compiles for sm_100 + sm_120.
#
# Usage:
# ./build.sh # builds unsloth-blackwell:latest pinned to unsloth main
# TAG=2026.05.1 ./build.sh # custom tag
# UNSLOTH_REF=v2026.5.6 UNSLOTH_ZOO_REF=v2026.5.4 ./build.sh # pin git refs
set -euo pipefail
cd "$(dirname "$0")"
IMAGE_NAME="${IMAGE_NAME:-unsloth-blackwell}"
TAG="${TAG:-latest}"
CUDA_VERSION="${CUDA_VERSION:-12.8.1}"
UBUNTU_VERSION="${UBUNTU_VERSION:-24.04}"
PYTHON_VERSION="${PYTHON_VERSION:-3.12}"
UNSLOTH_REF="${UNSLOTH_REF:-main}"
UNSLOTH_ZOO_REF="${UNSLOTH_ZOO_REF:-main}"
# llama.cpp prebuilt: default to the newest release, resolved here to a concrete
# tag so the build-arg changes only on a new release (correct layer caching).
# Pin for a frozen build: LLAMA_PREBUILT_TAG=b9596-mix-e6f2453 ./build.sh
resolve_latest_llama_tag() {
curl -fsSL -o /dev/null -w '%{url_effective}' \
"https://github.com/unslothai/llama.cpp/releases/latest" 2>/dev/null \
| sed -n 's#.*/releases/tag/##p'
}
if [ -z "${LLAMA_PREBUILT_TAG:-}" ]; then
LLAMA_PREBUILT_TAG="$(resolve_latest_llama_tag || true)"
if [ -n "$LLAMA_PREBUILT_TAG" ]; then
echo "Resolved latest llama.cpp release: ${LLAMA_PREBUILT_TAG}"
else
LLAMA_PREBUILT_TAG="latest"
echo "Could not resolve latest llama.cpp tag here; passing 'latest' (resolved inside the build)"
fi
fi
echo "Building ${IMAGE_NAME}:${TAG}"
echo " CUDA ${CUDA_VERSION} Ubuntu ${UBUNTU_VERSION} Python ${PYTHON_VERSION}"
echo " unsloth @${UNSLOTH_REF}"
echo " unsloth-zoo @${UNSLOTH_ZOO_REF}"
echo " llama.cpp ${LLAMA_PREBUILT_TAG}"
echo " arch list 8.0;8.6;8.9;9.0;10.0;12.0+PTX"
echo
DOCKER_BUILDKIT=1 docker build \
--progress=plain \
--build-arg CUDA_VERSION="${CUDA_VERSION}" \
--build-arg UBUNTU_VERSION="${UBUNTU_VERSION}" \
--build-arg PYTHON_VERSION="${PYTHON_VERSION}" \
--build-arg UNSLOTH_REF="${UNSLOTH_REF}" \
--build-arg UNSLOTH_ZOO_REF="${UNSLOTH_ZOO_REF}" \
--build-arg LLAMA_PREBUILT_TAG="${LLAMA_PREBUILT_TAG}" \
-t "${IMAGE_NAME}:${TAG}" \
.
echo
echo "Built ${IMAGE_NAME}:${TAG}"
echo
echo "Smoke test on this host (B200, sm_100):"
echo " docker run --rm --gpus all ${IMAGE_NAME}:${TAG} python /workspace/smoke_test.py"
echo
echo "Smoke test on an RTX 5090 host (sm_120):"
echo " docker pull ${IMAGE_NAME}:${TAG} # or load .tar"
echo " docker run --rm --gpus all ${IMAGE_NAME}:${TAG} python /workspace/smoke_test.py"