install.sh 7.12 KB
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#!/bin/sh
# This script installs Ollama on Linux.
# It detects the current operating system architecture and installs the appropriate version of Ollama.

set -eu

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status() { echo ">>> $*" >&2; }
error() { echo "ERROR $*"; exit 1; }
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warning() { echo "WARNING: $*"; }
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TEMP_DIR=$(mktemp -d)
cleanup() { rm -rf $TEMP_DIR; }
trap cleanup EXIT
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available() { command -v $1 >/dev/null; }
require() {
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    local MISSING=''
    for TOOL in $*; do
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        if ! available $TOOL; then
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            MISSING="$MISSING $TOOL"
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        fi
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    done

    echo $MISSING
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}

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[ "$(uname -s)" = "Linux" ] || error 'This script is intended to run on Linux only.'
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case "$(uname -m)" in
    x86_64) ARCH="amd64" ;;
    aarch64|arm64) ARCH="arm64" ;;
    *) error "Unsupported architecture: $ARCH" ;;
esac
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SUDO=
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if [ "$(id -u)" -ne 0 ]; then
    # Running as root, no need for sudo
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    if ! available sudo; then
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        error "This script requires superuser permissions. Please re-run as root."
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    fi
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    SUDO="sudo"
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fi
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NEEDS=$(require curl awk grep sed tee xargs)
if [ -n "$NEEDS" ]; then
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    status "ERROR: The following tools are required but missing:"
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    for NEED in $NEEDS; do
        echo "  - $NEED"
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    done
    exit 1
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fi

status "Downloading ollama..."
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curl --fail --show-error --location --progress-bar -o $TEMP_DIR/ollama "https://ollama.ai/download/ollama-linux-$ARCH"
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status "Installing ollama to /usr/bin..."
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$SUDO install -o0 -g0 -m755 -d /usr/bin
$SUDO install -o0 -g0 -m755 $TEMP_DIR/ollama /usr/bin/ollama
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install_success() { status 'Install complete. Run "ollama" from the command line.'; }
trap install_success EXIT

# Everything from this point onwards is optional.
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configure_systemd() {
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    if ! id ollama >/dev/null 2>&1; then
        status "Creating ollama user..."
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        $SUDO useradd -r -s /bin/false -m -d /usr/share/ollama ollama
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    fi
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    status "Creating ollama systemd service..."
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    cat <<EOF | $SUDO tee /etc/systemd/system/ollama.service >/dev/null
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[Unit]
Description=Ollama Service
After=network-online.target

[Service]
ExecStart=/usr/bin/ollama serve
User=ollama
Group=ollama
Restart=always
RestartSec=3
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Environment="HOME=/usr/share/ollama"
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Environment="PATH=$PATH"
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[Install]
WantedBy=default.target
EOF
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    SYSTEMCTL_RUNNING="$(systemctl is-system-running || true)"
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    case $SYSTEMCTL_RUNNING in
        running|degraded)
            status "Enabling and starting ollama service..."
            $SUDO systemctl daemon-reload
            $SUDO systemctl enable ollama
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            start_service() { $SUDO systemctl restart ollama; }
            trap start_service EXIT
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            ;;
    esac
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}

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if available systemctl; then
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    configure_systemd
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fi

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if ! available lspci && ! available lshw; then
    warning "Unable to detect NVIDIA GPU. Install lspci or lshw to automatically detect and install NVIDIA CUDA drivers."
    exit 0
fi

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check_gpu() {
    case $1 in
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        lspci) available lspci && lspci -d '10de:' | grep -q 'NVIDIA' || return 1 ;;
        lshw) available lshw && $SUDO lshw -c display -numeric | grep -q 'vendor: .* \[10DE\]' || return 1 ;;
        nvidia-smi) available nvidia-smi || return 1 ;;
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    esac
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}

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if check_gpu nvidia-smi; then
    status "NVIDIA GPU installed."
    exit 0
fi

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if ! check_gpu lspci && ! check_gpu lshw; then
    warning "No NVIDIA GPU detected. Ollama will run in CPU-only mode."
    exit 0
fi

# ref: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#rhel-7-centos-7
# ref: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#rhel-8-rocky-8
# ref: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#rhel-9-rocky-9
# ref: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#fedora
install_cuda_driver_yum() {
    status 'Installing NVIDIA repository...'
    case $PACKAGE_MANAGER in
        yum)
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            $SUDO $PACKAGE_MANAGER -y install yum-utils
            $SUDO $PACKAGE_MANAGER-config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/$1$2/$(uname -m)/cuda-$1$2.repo
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            ;;
        dnf)
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            $SUDO $PACKAGE_MANAGER config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/$1$2/$(uname -m)/cuda-$1$2.repo
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            ;;
    esac

    case $1 in
        rhel)
            status 'Installing EPEL repository...'
            # EPEL is required for third-party dependencies such as dkms and libvdpau
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            $SUDO $PACKAGE_MANAGER -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-$2.noarch.rpm || true
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            ;;
    esac

    status 'Installing CUDA driver...'

    if [ "$1" = 'centos' ] || [ "$1$2" = 'rhel7' ]; then
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        $SUDO $PACKAGE_MANAGER -y install nvidia-driver-latest-dkms
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    fi
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    $SUDO $PACKAGE_MANAGER -y install cuda-drivers
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}

# ref: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#ubuntu
# ref: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#debian
install_cuda_driver_apt() {
    status 'Installing NVIDIA repository...'
    curl -fsSL -o $TEMP_DIR/cuda-keyring.deb https://developer.download.nvidia.com/compute/cuda/repos/$1$2/$(uname -m)/cuda-keyring_1.1-1_all.deb

    case $1 in
        debian)
            status 'Enabling contrib sources...'
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            $SUDO sed 's/main/contrib/' < /etc/apt/sources.list | sudo tee /etc/apt/sources.list.d/contrib.list > /dev/null
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            ;;
    esac

    status 'Installing CUDA driver...'
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    $SUDO dpkg -i $TEMP_DIR/cuda-keyring.deb
    $SUDO apt-get update
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    [ -n "$SUDO" ] && SUDO_E="$SUDO -E" || SUDO_E=
    DEBIAN_FRONTEND=noninteractive $SUDO_E apt-get -y install cuda-drivers -q
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}

if [ ! -f "/etc/os-release" ]; then
    error "Unknown distribution. Skipping CUDA installation."
fi

. /etc/os-release

OS_NAME=$ID
OS_VERSION=$VERSION_ID

PACKAGE_MANAGER=
for PACKAGE_MANAGER in dnf yum apt-get; do
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    if available $PACKAGE_MANAGER; then
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        break
    fi
done

if [ -z "$PACKAGE_MANAGER" ]; then
    error "Unknown package manager. Skipping CUDA installation."
fi

if ! check_gpu nvidia-smi || [ -z "$(nvidia-smi | grep -o "CUDA Version: [0-9]*\.[0-9]*")" ]; then
    case $OS_NAME in
        centos|rhel) install_cuda_driver_yum 'rhel' $OS_VERSION ;;
        rocky) install_cuda_driver_yum 'rhel' $(echo $OS_VERSION | cut -c1) ;;
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        fedora) install_cuda_driver_yum $OS_NAME $OS_VERSION ;;
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        amzn) install_cuda_driver_yum 'fedora' '35' ;;
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        debian) install_cuda_driver_apt $OS_NAME $OS_VERSION ;;
        ubuntu) install_cuda_driver_apt $OS_NAME $(echo $OS_VERSION | sed 's/\.//') ;;
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        *) exit ;;
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    esac
fi

if ! lsmod | grep -q nvidia; then
    KERNEL_RELEASE="$(uname -r)"
    case $OS_NAME in
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        centos|rhel|rocky|fedora|amzn) $SUDO $PACKAGE_MANAGER -y install kernel-devel-$KERNEL_RELEASE kernel-headers-$KERNEL_RELEASE ;;
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        debian|ubuntu) $SUDO apt-get -y install linux-headers-$KERNEL_RELEASE ;;
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        *) exit ;;
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    esac

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    NVIDIA_CUDA_VERSION=$($SUDO dkms status | awk -F: '/added/ { print $1 }')
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    if [ -n "$NVIDIA_CUDA_VERSION" ]; then
        $SUDO dkms install $NVIDIA_CUDA_VERSION
    fi

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    if lsmod | grep -q nouveau; then
        status "Removing nouveau..."
        $SUDO rmmod nouveau
    fi

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    $SUDO modprobe nvidia
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fi
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status "NVIDIA GPU installed."