Codex Release Bot
340 lines
12 KiB
Bash
340 lines
12 KiB
Bash
#!/bin/bash
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# ================================================================
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# Nexus Agent Install Script
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# Usage: curl -fsSL https://YOUR_NEXUS_DOMAIN/agent/install.sh | bash -s -- --url https://YOUR_NEXUS_DOMAIN --key API_KEY --id SERVER_ID
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#
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# Network model:
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# - Heartbeat: child → central HTTPS (443 outbound), no inbound 8601 required
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# - Scripts / push: central → child SSH (22)
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# - Agent HTTP listens on 127.0.0.1 only (local); not exposed on public 8601
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# ================================================================
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set -e
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CENTRAL_URL=""
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WEB_URL=""
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API_KEY=""
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SERVER_ID=""
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AGENT_PORT="8601"
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INSTALL_DIR="/opt/nexus-agent"
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# --- Python dependency versions (single source of truth) ---
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FASTAPI_VER="0.115.6"
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UVICORN_VER="0.34.0"
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HTTPX_VER="0.28.1"
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PSUTIL_VER="" # latest
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MULTIPART_VER="0.0.19"
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# --- Privilege detection ---
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if [ "$(id -u)" -eq 0 ]; then
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SUDO=""
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else
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if command -v sudo >/dev/null 2>&1; then
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# Test passwordless sudo (-n = non-interactive)
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if sudo -n true 2>/dev/null; then
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SUDO="sudo"
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echo " Non-root user detected — using sudo for privileged operations."
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else
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echo "ERROR: sudo requires a password. Configure passwordless sudo first:"
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echo " echo \"$(whoami) ALL=(ALL) NOPASSWD:ALL\" | sudo tee /etc/sudoers.d/nexus-agent"
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exit 1
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fi
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else
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echo "ERROR: Running as non-root and sudo is not available."
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echo " Either run as root or install sudo."
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exit 1
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fi
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fi
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while [[ $# -gt 0 ]]; do
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case $1 in
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--url) CENTRAL_URL="$2"; shift 2 ;;
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--web-url) WEB_URL="$2"; shift 2 ;;
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--key) API_KEY="$2"; shift 2 ;;
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--id) SERVER_ID="$2"; shift 2 ;;
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--port) AGENT_PORT="$2"; shift 2 ;;
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*) shift ;;
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esac
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done
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[ -z "$CENTRAL_URL" ] && echo "ERROR: --url is required" && exit 1
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[ -z "$SERVER_ID" ] && echo "ERROR: --id is required (server ID from Nexus dashboard)" && exit 1
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[ -z "$API_KEY" ] && echo "ERROR: --key is required (API key from Nexus settings)" && exit 1
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echo ""
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echo "=========================================="
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echo " Nexus Agent Install"
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echo "=========================================="
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echo " Server: $CENTRAL_URL"
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echo " ID: $SERVER_ID"
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echo " Port: ${AGENT_PORT} (localhost only)"
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echo "=========================================="
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echo ""
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# 0. Stop existing service + kill stale processes on the port
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echo "[0/7] Clean up old installation..."
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$SUDO systemctl stop nexus-agent 2>/dev/null || true
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# Kill any process occupying the agent port (stale process from manual start, etc.)
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if command -v fuser >/dev/null 2>&1; then
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$SUDO fuser -k "${AGENT_PORT}"/tcp 2>/dev/null || true
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elif command -v ss >/dev/null 2>&1; then
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PID=$(ss -tlnp 2>/dev/null | grep ":${AGENT_PORT}" | grep -oP 'pid=\K[0-9]+' | head -1)
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[ -n "$PID" ] && kill "$PID" 2>/dev/null || true
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elif command -v netstat >/dev/null 2>&1; then
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PID=$(netstat -tlnp 2>/dev/null | grep ":${AGENT_PORT}" | awk '{print $7}' | cut -d'/' -f1 | head -1)
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[ -n "$PID" ] && kill "$PID" 2>/dev/null || true
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fi
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echo " Old service stopped, port cleared"
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# 1. Resolve Python 3.10+ (system → BT only if executable → auto-install system 3.12)
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echo "[1/7] Resolve Python 3.10+..."
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PYTHON=""
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_python_version_ok() {
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local ver="$1" major minor
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[ -n "$ver" ] || return 1
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major=${ver%%.*}
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minor=${ver#*.}
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[ "$major" -eq 3 ] && [ "${minor:-0}" -ge 10 ] 2>/dev/null
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}
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_try_python_candidate() {
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local candidate="$1" ver
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[ -n "$candidate" ] || return 1
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if [ "${candidate#/}" != "$candidate" ]; then
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[ -x "$candidate" ] || return 1
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else
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command -v "$candidate" >/dev/null 2>&1 || return 1
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fi
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ver=$("$candidate" -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")' 2>/dev/null || true)
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if _python_version_ok "$ver"; then
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PYTHON="$candidate"
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return 0
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fi
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return 1
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}
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_bt_executable_python_candidates() {
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local base p
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for base in /www/server/panel/pyenv/bin; do
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[ -d "$base" ] || continue
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for p in "$base"/python3.12 "$base"/python3.11 "$base"/python3.10; do
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[ -x "$p" ] && echo "$p"
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done
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if command -v find >/dev/null 2>&1; then
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find "$base" -maxdepth 1 -type f -name 'python3.*' -executable 2>/dev/null | sort -Vr
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else
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for p in "$base"/python3.*; do
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[ -x "$p" ] && echo "$p"
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done
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fi
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done
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for p in /www/server/python-manager/versions/*/bin/python3.* \
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/www/server/python_manager/versions/*/bin/python3.*; do
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[ -x "$p" ] && echo "$p"
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done
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}
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_resolve_python_from() {
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local candidate
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for candidate in $1; do
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if _try_python_candidate "$candidate"; then
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return 0
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fi
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done
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return 1
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}
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_install_system_python312() {
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echo " No executable Python 3.10+ — installing system python3.12..."
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export DEBIAN_FRONTEND=noninteractive
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if command -v apt-get >/dev/null 2>&1; then
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$SUDO apt-get update -qq
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if ! $SUDO apt-get install -y -qq python3.12 python3.12-venv python3.12-dev >/dev/null 2>&1; then
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echo " Trying deadsnakes PPA (Ubuntu)..."
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$SUDO apt-get install -y -qq software-properties-common >/dev/null 2>&1 || true
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$SUDO add-apt-repository -y ppa:deadsnakes/ppa >/dev/null 2>&1 || true
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$SUDO apt-get update -qq
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$SUDO apt-get install -y -qq python3.12 python3.12-venv python3.12-dev >/dev/null 2>&1 \
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|| return 1
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fi
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return 0
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fi
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if command -v dnf >/dev/null 2>&1; then
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$SUDO dnf install -y -q python3.12 python3.12-devel >/dev/null 2>&1 \
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|| $SUDO dnf install -y -q python3.11 python3.11-devel >/dev/null 2>&1 \
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|| $SUDO dnf install -y -q python3 python3-devel >/dev/null 2>&1 \
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|| return 1
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return 0
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fi
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if command -v yum >/dev/null 2>&1; then
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$SUDO yum install -y -q python3.12 python3.12-devel >/dev/null 2>&1 \
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|| $SUDO yum install -y -q python3 python3-devel >/dev/null 2>&1 \
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|| return 1
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return 0
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fi
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if command -v apk >/dev/null 2>&1; then
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$SUDO apk add --quiet python3 py3-pip >/dev/null 2>&1 || return 1
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return 0
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fi
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return 1
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}
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SYSTEM_CANDIDATES="python3.12 python3.11 python3.10 /usr/bin/python3.12 /usr/bin/python3.11 /usr/bin/python3.10"
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BT_CANDIDATES=""
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while IFS= read -r p; do
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[ -n "$p" ] && BT_CANDIDATES="$BT_CANDIDATES $p"
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done < <(_bt_executable_python_candidates | awk '!seen[$0]++')
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if ! _resolve_python_from "$SYSTEM_CANDIDATES $BT_CANDIDATES"; then
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if _install_system_python312; then
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POST_INSTALL="python3.12 python3.11 python3.10 /usr/bin/python3.12 /usr/bin/python3.11 /usr/bin/python3.10 python3"
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_resolve_python_from "$POST_INSTALL" || true
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fi
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fi
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if [ -z "$PYTHON" ]; then
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echo "ERROR: Python 3.10+ required. System install failed — install python3.12 manually and re-run."
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exit 1
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fi
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echo " Using: $PYTHON ($("$PYTHON" --version 2>&1))"
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# 2. Ensure rsync (required for push/sync)
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echo "[2/7] Check rsync..."
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if ! command -v rsync >/dev/null 2>&1; then
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echo " rsync not found — installing..."
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if command -v apt-get >/dev/null 2>&1; then
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$SUDO apt-get update -qq && $SUDO apt-get install -y -qq rsync
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elif command -v yum >/dev/null 2>&1; then
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$SUDO yum install -y -q rsync
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elif command -v dnf >/dev/null 2>&1; then
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$SUDO dnf install -y -q rsync
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elif command -v apk >/dev/null 2>&1; then
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$SUDO apk add --quiet rsync
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else
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echo "ERROR: Cannot detect package manager. Please install rsync manually."
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exit 1
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fi
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echo " rsync installed OK"
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else
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echo " rsync already available"
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fi
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# 3. Create dir + venv
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echo "[3/7] Create venv..."
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VENV_DIR="${INSTALL_DIR}/.venv"
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$SUDO mkdir -p "$INSTALL_DIR"
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# If using sudo, give ownership to current user so venv/pip work without sudo
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if [ -n "$SUDO" ]; then
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$SUDO chown -R "$(id -u):$(id -g)" "$INSTALL_DIR"
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fi
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if [ ! -f "$VENV_DIR/bin/activate" ]; then
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# Allow venv creation to fail (set -e won't abort) so we can install python3-venv
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"$PYTHON" -m venv "$VENV_DIR" 2>/dev/null || true
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# venv creation fails when python3-venv is missing — check if activate exists
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if [ ! -f "$VENV_DIR/bin/activate" ]; then
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echo " venv incomplete — installing python3-venv..."
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$SUDO apt-get update -qq && $SUDO apt-get install -y -qq "python$( "$PYTHON" -c 'import sys;print(f"{sys.version_info.major}.{sys.version_info.minor}")' )-venv" 2>/dev/null \
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|| $SUDO apt-get install -y -qq python3-venv 2>/dev/null \
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|| { echo "ERROR: Cannot install python3-venv. Run: $SUDO apt install python3-venv"; exit 1; }
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rm -rf "$VENV_DIR"
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"$PYTHON" -m venv "$VENV_DIR"
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if [ ! -f "$VENV_DIR/bin/activate" ]; then
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echo "ERROR: venv creation failed even after installing python3-venv"
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exit 1
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fi
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fi
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fi
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# shellcheck disable=SC1091
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source "$VENV_DIR/bin/activate"
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pip install -q --upgrade pip
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PIP_DEPS="fastapi==${FASTAPI_VER} uvicorn==${UVICORN_VER} httpx==${HTTPX_VER} python-multipart==${MULTIPART_VER}"
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[ -n "$PSUTIL_VER" ] && PIP_DEPS="${PIP_DEPS} psutil==${PSUTIL_VER}" || PIP_DEPS="${PIP_DEPS} psutil"
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pip install -q $PIP_DEPS
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# 4. Download agent.py + cpu_metrics.py + heartbeat_policy.py
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echo "[4/7] Download agent files..."
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[ -z "$WEB_URL" ] && WEB_URL="${CENTRAL_URL}"
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curl -fsSL "${WEB_URL}/agent/agent.py" -o "$INSTALL_DIR/agent.py" || {
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echo "ERROR: Cannot download from $WEB_URL/agent/agent.py"
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exit 1
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}
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curl -fsSL "${WEB_URL}/agent/cpu_metrics.py" -o "$INSTALL_DIR/cpu_metrics.py" || {
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echo "ERROR: Cannot download from $WEB_URL/agent/cpu_metrics.py"
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exit 1
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}
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curl -fsSL "${WEB_URL}/agent/heartbeat_policy.py" -o "$INSTALL_DIR/heartbeat_policy.py" || {
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echo "ERROR: Cannot download from $WEB_URL/agent/heartbeat_policy.py"
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exit 1
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}
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# 5. Config
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echo "[5/7] Write config..."
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CENTRAL_HOST=$(echo "${CENTRAL_URL}" | sed 's~https\?://~~' | cut -d'/' -f1 | cut -d':' -f1)
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cat > "$INSTALL_DIR/config.json" << EOF
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{
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"server_id": ${SERVER_ID},
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"central": { "url": "${CENTRAL_URL}", "api_key": "${API_KEY}" },
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"api_key": "${API_KEY}",
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"heartbeat_interval": 60,
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"allowed_ips": ["${CENTRAL_HOST}"],
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"log_file": "/var/log/nexus-agent.log",
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"log_level": "INFO",
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"server": { "host": "127.0.0.1", "port": ${AGENT_PORT} }
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}
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EOF
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echo " IP allowlist (Agent HTTP): ${CENTRAL_HOST}"
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echo " Note: inbound TCP ${AGENT_PORT} is NOT required (heartbeat uses HTTPS outbound)."
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# 6. systemd + start (bind localhost only)
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echo "[6/7] Setup systemd + start..."
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$SUDO tee /etc/systemd/system/nexus-agent.service > /dev/null << EOF
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[Unit]
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Description=Nexus Agent
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After=network.target
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[Service]
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Type=simple
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User=root
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WorkingDirectory=${INSTALL_DIR}
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Environment=PATH=${VENV_DIR}/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
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ExecStart=${VENV_DIR}/bin/python -m uvicorn agent:app --host 127.0.0.1 --port ${AGENT_PORT} --log-level info
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Restart=always
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RestartSec=5
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[Install]
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WantedBy=multi-user.target
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EOF
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$SUDO systemctl daemon-reload
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$SUDO systemctl enable nexus-agent
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$SUDO systemctl start nexus-agent
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sleep 2
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STATUS="running"
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$SUDO systemctl is-active --quiet nexus-agent || STATUS="FAILED"
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# 7. Verify
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echo "[7/7] Verify..."
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HOSTNAME=$(hostname 2>/dev/null || echo "unknown")
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IP=$(hostname -I 2>/dev/null | awk '{print $1}' || echo "unknown")
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echo ""
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echo "=========================================="
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echo " Done! Status: ${STATUS}"
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echo "=========================================="
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echo ""
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echo " Heartbeat: ${CENTRAL_URL}/api/agent/heartbeat (HTTPS outbound)"
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echo " Agent HTTP: 127.0.0.1:${AGENT_PORT} (local only, no public firewall rule needed)"
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echo " Scripts: via SSH port 22 from Nexus center"
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echo " Server ID: ${SERVER_ID}"
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echo ""
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echo " Commands:"
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echo " systemctl status nexus-agent"
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echo " journalctl -u nexus-agent -f"
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echo " systemctl restart nexus-agent"
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echo ""
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