Agent
cc0a0c0644
- Removed 'set -e' so a failing metric collection command doesn't kill the agent process - Added '|| true' to every command in collect_metrics() to prevent pipeline failures - Fixed push_metrics() to capture curl exit code with 'local code; code=$(...) || code=0' - The agent now keeps running even if individual metrics or push fail
145 lines
3.8 KiB
Bash
145 lines
3.8 KiB
Bash
#!/bin/bash
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# ServerManager Agent Installer
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# Usage: bash agent-install.sh <SERVER_URL> <AGENT_KEY> [INTERVAL]
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SERVER_URL="${1:-}"
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AGENT_KEY="${2:-}"
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INTERVAL="${3:-60}"
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if [ -z "$SERVER_URL" ] || [ -z "$AGENT_KEY" ]; then
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echo "Usage: bash agent-install.sh <SERVER_URL> <AGENT_KEY> [INTERVAL]"
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exit 1
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fi
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# Detect if we can run as root
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CAN_ROOT=false
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if [ "$(id -u)" -eq 0 ]; then
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CAN_ROOT=true
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elif command -v sudo >/dev/null 2>&1 && sudo -n true 2>/dev/null; then
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CAN_ROOT=true
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fi
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if [ "$CAN_ROOT" = true ]; then
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if [ "$(id -u)" -ne 0 ]; then
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if command -v script >/dev/null 2>&1; then
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exec script -q -c "sudo bash '$0' '$1' '$2' '$3'" /dev/null
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fi
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exec sudo bash "$0" "$@"
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fi
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AGENT_BIN="/usr/local/bin/servermanager-agent"
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SERVICE_FILE="/etc/systemd/system/servermanager-agent.service"
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USE_SYSTEMD=true
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INSTALL_MODE="system"
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else
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AGENT_BIN="$HOME/.local/bin/servermanager-agent"
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USE_SYSTEMD=false
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INSTALL_MODE="user"
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fi
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echo "[1/3] Creating directory..."
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mkdir -p "$(dirname "$AGENT_BIN")"
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echo "[2/3] Installing agent binary..."
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cat > "$AGENT_BIN" << 'AGENTSCRIPT'
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#!/bin/bash
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SERVER_URL="@SERVER_URL@"
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AGENT_KEY="@AGENT_KEY@"
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INTERVAL=@INTERVAL@
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collect_metrics() {
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CPU=$(top -bn1 2>/dev/null | grep 'Cpu(s)' | awk '{print $2}' | cut -d'%' -f1 || true)
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[ -z "$CPU" ] && CPU=0
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RAM=$(free 2>/dev/null | grep Mem | awk '{printf "%.1f", $3/$2 * 100}' || true)
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[ -z "$RAM" ] && RAM=0
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DISK=$(df / 2>/dev/null | tail -1 | awk '{print $5}' | sed 's/%//' || true)
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[ -z "$DISK" ] && DISK=0
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LOAD=$(cat /proc/loadavg 2>/dev/null | awk '{print $1}' || true)
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[ -z "$LOAD" ] && LOAD=0
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UPTIME=$(uptime -p 2>/dev/null | sed 's/^up //' || true)
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[ -z "$UPTIME" ] && UPTIME=""
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}
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push_metrics() {
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payload=$(cat <<EOF
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{
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"agent_key": "$AGENT_KEY",
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"cpu": $CPU,
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"ram": $RAM,
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"disk": $DISK,
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"load": $LOAD,
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"uptime": "$UPTIME"
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}
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EOF
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)
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local code
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code=$(curl -s -X POST "$SERVER_URL/api/metrics/push" \
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-H "Content-Type: application/json" \
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-d "$payload" \
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--connect-timeout 10 --max-time 30 \
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-o /dev/null -w "%{http_code}" 2>/dev/null) || code=0
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echo "$code"
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}
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echo "ServerManager Agent started (interval: ${INTERVAL}s)"
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sleep 2
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while true; do
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collect_metrics
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http_code=$(push_metrics)
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echo "[$(date)] HTTP $http_code"
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sleep "$INTERVAL"
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done
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AGENTSCRIPT
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sed -i \
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"s|@SERVER_URL@|$SERVER_URL|g" \
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-e "s|@AGENT_KEY@|$AGENT_KEY|g" \
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-e "s|@INTERVAL@|$INTERVAL|g" \
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"$AGENT_BIN"
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chmod +x "$AGENT_BIN"
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if [ ! -f "$AGENT_BIN" ]; then
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echo "ERROR: Agent binary was not created"
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exit 1
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fi
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echo " Binary: $AGENT_BIN ($(wc -c < "$AGENT_BIN") bytes)"
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echo "[3/3] Enabling auto-start..."
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if [ "$USE_SYSTEMD" = true ]; then
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echo " Using systemd service..."
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cat > "$SERVICE_FILE" << 'UNIT'
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[Unit]
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Description=ServerManager Monitoring Agent
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=simple
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ExecStart=/usr/local/bin/servermanager-agent
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Restart=always
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RestartSec=10
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[Install]
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WantedBy=multi-user.target
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UNIT
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systemctl daemon-reload 2>/dev/null || true
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systemctl enable servermanager-agent 2>/dev/null || true
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systemctl restart servermanager-agent 2>/dev/null || true
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else
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echo " Using crontab (@reboot)..."
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LOG_DIR="$HOME/.local/share/servermanager"
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mkdir -p "$LOG_DIR"
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CRON_JOB="@reboot $AGENT_BIN > $LOG_DIR/agent.log 2>&1"
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(crontab -l 2>/dev/null | grep -v 'servermanager-agent'; echo "$CRON_JOB") | crontab - 2>/dev/null || {
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echo "WARNING: Could not install crontab."
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echo " Run: $AGENT_BIN &"
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}
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fi
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echo ""
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echo "ServerManager Agent installed successfully!"
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echo " Mode: $INSTALL_MODE"
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echo " Binary: $AGENT_BIN"
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echo " Config: embedded in binary (no external config file)"
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