69f475ec78
- Add logwhisperer.sh script for tailing and monitoring system logs - Implement pattern matching for critical errors (FATAL, ERROR, OOM, segfault) - Add JSON payload generation with severity levels - Implement rate limiting and offset tracking per log source - Add install.sh with interactive configuration and systemd support - Create comprehensive test suite with pytest - Add technical specification documentation - Update CHANGELOG.md following Common Changelog standard All 12 tests passing. Follows Metodo Sacchi (Safety first, little often, double check).
334 lines
9.4 KiB
Bash
Executable File
334 lines
9.4 KiB
Bash
Executable File
#!/bin/bash
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#
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# LogWhisperer Agent - Script di Installazione
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# Installa lo script di monitoraggio log e configura l'ambiente
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#
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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INSTALL_DIR="/usr/local/bin"
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CONFIG_DIR="/etc/logwhisperer"
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DATA_DIR="/var/lib/logwhisperer"
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LOG_DIR="/var/log/logwhisperer"
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# Colori per output
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m' # No Color
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log_info() {
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echo -e "${GREEN}[INFO]${NC} $1"
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}
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log_warn() {
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echo -e "${YELLOW}[WARN]${NC} $1"
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}
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log_error() {
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echo -e "${RED}[ERROR]${NC} $1"
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}
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# Genera UUID v4
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generate_uuid() {
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# Usa /proc/sys/kernel/random/uuid se disponibile (Linux)
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if [[ -r /proc/sys/kernel/random/uuid ]]; then
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cat /proc/sys/kernel/random/uuid
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else
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# Fallback con uuidgen o generazione manuale
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if command -v uuidgen &> /dev/null; then
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uuidgen
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else
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# Generazione manuale semplice
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local hex="0123456789abcdef"
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local uuid=""
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for i in {0..35}; do
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if [[ $i == 8 || $i == 13 || $i == 18 || $i == 23 ]]; then
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uuid+="-"
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elif [[ $i == 14 ]]; then
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uuid+="4"
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elif [[ $i == 19 ]]; then
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uuid+="${hex:$((RANDOM % 4 + 8)):1}"
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else
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uuid+="${hex:$((RANDOM % 16)):1}"
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fi
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done
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echo "$uuid"
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fi
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fi
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}
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# Verifica prerequisiti
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check_prerequisites() {
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log_info "Verifica prerequisiti..."
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# Verifica bash
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if [[ "${BASH_VERSION:-}" < "4.0" ]]; then
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log_error "Richiesto Bash 4.0 o superiore"
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exit 1
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fi
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# Verifica curl
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if ! command -v curl &> /dev/null; then
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log_error "curl non trovato. Installa curl: apt-get install curl / yum install curl"
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exit 1
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fi
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# Verifica permessi root per installazione system-wide
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if [[ $EUID -ne 0 ]]; then
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log_warn "Esecuzione senza root. Installazione in modalità utente..."
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INSTALL_DIR="$HOME/.local/bin"
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CONFIG_DIR="$HOME/.config/logwhisperer"
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DATA_DIR="$HOME/.local/share/logwhisperer"
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LOG_DIR="$HOME/.local/log/logwhisperer"
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fi
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log_info "Prerequisiti OK"
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}
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# Crea directory necessarie
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create_directories() {
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log_info "Creazione directory..."
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mkdir -p "$CONFIG_DIR"
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mkdir -p "$DATA_DIR"
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mkdir -p "$LOG_DIR"
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mkdir -p "$INSTALL_DIR"
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log_info "Directory create"
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}
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# Configura il client
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configure_client() {
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log_info "Configurazione LogWhisperer..."
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local config_file="$CONFIG_DIR/config.env"
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local client_id
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local webhook_url
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local log_sources
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# Genera CLIENT_ID
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client_id=$(generate_uuid)
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log_info "Client ID generato: $client_id"
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# Chiedi WEBHOOK_URL
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echo ""
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echo "=========================================="
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echo "Configurazione Webhook"
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echo "=========================================="
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read -p "Inserisci l'URL del webhook n8n: " webhook_url
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if [[ -z "$webhook_url" ]]; then
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log_warn "Nessun webhook URL fornito. Lo script funzionerà in modalità offline."
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webhook_url=""
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elif [[ ! "$webhook_url" =~ ^https:// ]]; then
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log_warn "L'URL non usa HTTPS. Si consiglia di usare HTTPS per la sicurezza."
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fi
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# Configura LOG_SOURCES
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echo ""
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echo "=========================================="
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echo "Configurazione Sorgenti Log"
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echo "=========================================="
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# Rileva sistema e propone defaults
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local default_sources="/var/log/syslog"
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if [[ -f /etc/redhat-release ]]; then
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default_sources="/var/log/messages"
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fi
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if [[ -f /var/log/nginx/error.log ]]; then
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default_sources="$default_sources,/var/log/nginx/error.log"
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fi
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if [[ -d /var/log/postgresql ]]; then
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default_sources="$default_sources,/var/log/postgresql/*.log"
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fi
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read -p "Sorgenti log da monitorare [$default_sources]: " log_sources
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log_sources="${log_sources:-$default_sources}"
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# Chiedi POLL_INTERVAL
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echo ""
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read -p "Intervallo di polling in secondi [5]: " poll_interval
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poll_interval="${poll_interval:-5}"
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# Scrivi configurazione
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cat > "$config_file" <<EOF
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# LogWhisperer Configuration
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# Generato automaticamente il $(date)
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WEBHOOK_URL="$webhook_url"
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CLIENT_ID="$client_id"
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LOG_SOURCES="$log_sources"
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POLL_INTERVAL=$poll_interval
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MAX_LINE_LENGTH=2000
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EOF
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chmod 600 "$config_file"
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log_info "Configurazione salvata in: $config_file"
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# Mostra riepilogo
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echo ""
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echo "=========================================="
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echo "Riepilogo Configurazione"
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echo "=========================================="
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echo "Client ID: $client_id"
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echo "Webhook URL: ${webhook_url:-<non configurato>}"
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echo "Log Sources: $log_sources"
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echo "Poll Interval: ${poll_interval}s"
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echo "Config File: $config_file"
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echo "=========================================="
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}
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# Installa lo script
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install_script() {
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log_info "Installazione script..."
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local source_script="$SCRIPT_DIR/logwhisperer.sh"
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local target_script="$INSTALL_DIR/logwhisperer"
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if [[ ! -f "$source_script" ]]; then
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log_error "Script sorgente non trovato: $source_script"
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exit 1
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fi
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cp "$source_script" "$target_script"
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chmod +x "$target_script"
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log_info "Script installato in: $target_script"
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}
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# Crea systemd service (se root)
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create_systemd_service() {
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if [[ $EUID -ne 0 ]]; then
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log_info "Installazione utente: salto creazione servizio systemd"
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return 0
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fi
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log_info "Creazione servizio systemd..."
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local service_file="/etc/systemd/system/logwhisperer.service"
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cat > "$service_file" <<EOF
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[Unit]
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Description=LogWhisperer Agent - Log Monitoring Service
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After=network.target
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[Service]
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Type=simple
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ExecStart=$INSTALL_DIR/logwhisperer --config $CONFIG_DIR/config.env
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Restart=always
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RestartSec=10
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User=root
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Group=adm
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StandardOutput=append:$LOG_DIR/agent.log
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StandardError=append:$LOG_DIR/agent.log
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[Install]
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WantedBy=multi-user.target
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EOF
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systemctl daemon-reload
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log_info "Servizio systemd creato"
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log_info "Per avviare: systemctl start logwhisperer"
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log_info "Per abilitare all'avvio: systemctl enable logwhisperer"
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}
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# Testa l'installazione
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test_installation() {
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log_info "Test installazione..."
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if ! command -v logwhisperer &> /dev/null; then
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# Aggiungi a PATH se necessario
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if [[ $EUID -ne 0 ]]; then
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log_warn "Aggiungi $INSTALL_DIR al tuo PATH:"
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echo " export PATH=\"\$PATH:$INSTALL_DIR\""
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echo " oppure riavvia la shell"
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fi
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fi
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# Testa la configurazione
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local config_file="$CONFIG_DIR/config.env"
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if [[ -f "$config_file" ]]; then
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# shellcheck source=/dev/null
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source "$config_file"
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if [[ -n "${WEBHOOK_URL:-}" ]]; then
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log_info "Test di connettività al webhook..."
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if curl -s -o /dev/null -w "%{http_code}" "$WEBHOOK_URL" | grep -q "200\\|404"; then
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log_info "Webhook raggiungibile"
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else
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log_warn "Webhook non raggiungibile. Verifica l'URL."
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fi
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fi
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fi
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log_info "Test completato"
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}
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# Mostra istruzioni finali
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show_instructions() {
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echo ""
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echo "=========================================="
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echo "Installazione Completata!"
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echo "=========================================="
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echo ""
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echo "Comandi disponibili:"
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echo " logwhisperer --help Mostra help"
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echo " logwhisperer --validate Verifica configurazione"
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echo " logwhisperer --dry-run --test-line 'FATAL error' Test pattern"
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echo ""
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if [[ $EUID -eq 0 ]]; then
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echo "Gestione servizio:"
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echo " systemctl start logwhisperer Avvia servizio"
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echo " systemctl stop logwhisperer Ferma servizio"
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echo " systemctl status logwhisperer Stato servizio"
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echo " journalctl -u logwhisperer -f Log servizio"
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echo ""
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fi
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echo "File importanti:"
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echo " Config: $CONFIG_DIR/config.env"
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echo " Logs: $LOG_DIR/"
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echo " Data: $DATA_DIR/"
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echo ""
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echo "Prossimi passi:"
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echo " 1. Verifica la configurazione: logwhisperer --validate"
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echo " 2. Testa il pattern matching: logwhisperer --dry-run --test-line 'ERROR test'"
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echo " 3. Avvia il monitoraggio"
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if [[ $EUID -eq 0 ]]; then
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echo " systemctl start logwhisperer"
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else
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echo " logwhisperer --config $CONFIG_DIR/config.env"
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fi
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echo ""
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echo "=========================================="
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}
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# Main
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main() {
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echo ""
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echo "╔══════════════════════════════════════════╗"
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echo "║ LogWhisperer Agent Installer ║"
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echo "║ Versione 1.0.0 ║"
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echo "╚══════════════════════════════════════════╝"
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echo ""
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check_prerequisites
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create_directories
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configure_client
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install_script
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create_systemd_service
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test_installation
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show_instructions
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}
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# Se eseguito direttamente
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if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
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main "$@"
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fi
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