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Linux / Bash
curl ile Alertalk webhook entegrasyonu. Systemd servis izleme, cron job kontrolü, disk/CPU/RAM izleme, log dosyası izleme, SSL sertifika ve website uptime kontrolü için hazır bash scriptleri.
Tüm scriptler standart bash ile çalışır. Bağımlılık yok — sadece
curl gerekli. Ubuntu, Debian, RHEL, CentOS ve türevleri desteklenir.
Temel Fonksiyon
Tüm senaryolarda kullanılan temel fonksiyon. Kendi scriptlerinizin başına kopyalayın.
bash — temel fonksiyon
#!/bin/bash ALERTALK_KEY="YOUR_WEBHOOK_KEY" ALERTALK_URL="https://tr.alertalk.net/webhook/receive" send_alert() { local phone="$1" local message="$2" curl -s -X POST "${ALERTALK_URL}" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${phone}\",\"error_message\":\"${message}\"}" \ --max-time 10 \ --silent } # Kullanim send_alert "5XXXXXXXXX" "Test alarmi: entegrasyon basarili"
Hata Yönetimi
bash — retry ve hata kontrolü
send_alert() { local phone="$1" local message="$2" local retries=3 local attempt=0 while [ $attempt -lt $retries ]; do http_code=$(curl -s -o /dev/null -w "%{http_code}" \ -X POST "${ALERTALK_URL}" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${phone}\",\"error_message\":\"${message}\"}" \ --max-time 10) if [ "${http_code}" = "200" ]; then return 0 fi attempt=$((attempt + 1)) sleep 5 done # 3 deneme basarisiz — loga yaz echo "$(date): Alertalk webhook basarisiz (HTTP ${http_code})" >> /var/log/alertalk.log }
Gerçek Senaryolar
Systemd Servis İzleme
Servis durduğunda otomatik sesli alarm — ExecStopPost ile
Systemd'nin ExecStopPost direktifi servisi durduğunda çalışacak komutu belirtir. Cron gerekmez — servis düşer düşmez alarm tetiklenir.
/etc/systemd/system/myapp.service
systemd service — ExecStopPost
[Unit] Description=My Application After=network.target [Service] Type=simple User=www-data ExecStart=/usr/bin/python3 /opt/myapp/app.py Restart=on-failure RestartSec=5 # Servis durduğunda Alertalk'a webhook gönder ExecStopPost=/bin/bash -c \ 'curl -s -X POST "https://tr.alertalk.net/webhook/receive" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: YOUR_WEBHOOK_KEY" \ -d "{\"phone_number\":\"5XXXXXXXXX\",\"error_message\":\"$(hostname) - myapp servisi durdu\"}" \ --max-time 10' [Install] WantedBy=multi-user.target
bash — değişiklik sonrası uygula
systemctl daemon-reload systemctl restart myapp
Restart=on-failure ile systemd servisi otomatik yeniden başlatır. ExecStopPost her durumda çalışır.
Cron Job Başarısız Kontrol
Exit code kontrolü ile cron job başarısız olunca ara
bash — exit code kontrolü
#!/bin/bash # /opt/scripts/backup.sh — cron'dan cagrilir ALERTALK_KEY="YOUR_WEBHOOK_KEY" PHONE="5XXXXXXXXX" HOSTNAME=$(hostname) # Asil islemi calistir /usr/bin/rsync -az /data/ [email protected]:/backup/ EXIT_CODE=$? if [ $EXIT_CODE -ne 0 ]; then curl -s -X POST "https://tr.alertalk.net/webhook/receive" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${PHONE}\",\"error_message\":\"${HOSTNAME} - Yedekleme basarisiz oldu (hata kodu: ${EXIT_CODE})\"}" \ --max-time 10 fi exit $EXIT_CODE
crontab -e
# Her gece 02:00'da calistir 0 2 * * * /opt/scripts/backup.sh >> /var/log/backup.log 2>&1
Disk / CPU / RAM İzleme
Sistem kaynakları eşik değerini aşınca sesli alarm
bash — sistem kaynak izleme scripti
#!/bin/bash # /opt/scripts/resource_check.sh ALERTALK_KEY="YOUR_WEBHOOK_KEY" PHONE="5XXXXXXXXX" HOSTNAME=$(hostname) # Esik degerleri (%) DISK_THRESHOLD=85 CPU_THRESHOLD=90 RAM_THRESHOLD=90 send_alert() { curl -s -X POST "https://tr.alertalk.net/webhook/receive" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${PHONE}\",\"error_message\":\"$1\"}" \ --max-time 10 --silent } # --- DİSK KONTROLU --- while IFS= read -r line; do usage=$(echo "$line" | awk '{print $5}' | tr -d '%') mount=$(echo "$line" | awk '{print $6}') if [ "$usage" -ge $DISK_THRESHOLD ] 2>/dev/null; then send_alert "${HOSTNAME} - Disk dolu: ${mount} %${usage} kullanimda" fi done < <(df -h | tail -n +2) # --- CPU KONTROLU --- cpu_idle=$(top -bn1 | grep "Cpu(s)" | awk '{print $8}' | tr -d '%id,') cpu_usage=$(echo "100 - ${cpu_idle}" | bc | cut -d'.' -f1) if [ "${cpu_usage}" -ge $CPU_THRESHOLD ] 2>/dev/null; then send_alert "${HOSTNAME} - CPU kullanimi kritik: %${cpu_usage}" fi # --- RAM KONTROLU --- ram_total=$(free | grep Mem | awk '{print $2}') ram_used=$(free | grep Mem | awk '{print $3}') ram_usage=$(( ram_used * 100 / ram_total )) if [ "${ram_usage}" -ge $RAM_THRESHOLD ]; then ram_free_mb=$(( (ram_total - ram_used) / 1024 )) send_alert "${HOSTNAME} - RAM kullanimi kritik: %${ram_usage}, kalan: ${ram_free_mb}MB" fi
crontab -e — her 5 dakika
*/5 * * * * /bin/bash /opt/scripts/resource_check.shLog Dosyası İzleme
tail + grep ile log dosyasında belirli pattern gelince ara
bash — gerçek zamanlı log izleme (daemon)
#!/bin/bash # /opt/scripts/logwatch.sh — systemd service olarak calistir ALERTALK_KEY="YOUR_WEBHOOK_KEY" PHONE="5XXXXXXXXX" HOSTNAME=$(hostname) LOG_FILE="/var/log/myapp/app.log" # Izlenecek kritik patternlar PATTERNS=("CRITICAL" "FATAL" "OutOfMemoryError" "Connection refused") # Log dosyasini gercek zamanli izle tail -F "${LOG_FILE}" | while IFS= read -r line; do for pattern in "${PATTERNS[@]}"; do if echo "${line}" | grep -q "${pattern}"; then msg="${HOSTNAME} - Log alarmı [${pattern}]: $(echo ${line} | cut -c1-120)" curl -s -X POST "https://tr.alertalk.net/webhook/receive" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${PHONE}\",\"error_message\":\"${msg}\"}" \ --max-time 10 --silent sleep 60 # 60 sn cooldown — spam onleme break fi done done
/etc/systemd/system/alertalk-logwatch.service
systemd — log izleyiciyi servis olarak çalıştır
[Unit] Description=Alertalk Log Watcher After=network.target [Service] Type=simple ExecStart=/bin/bash /opt/scripts/logwatch.sh Restart=always RestartSec=10 [Install] WantedBy=multi-user.target
bash
systemctl daemon-reload systemctl enable --now alertalk-logwatch
SSL Sertifika Bitiş Kontrolü
Sertifika sona ermeden 30/14/7 gün önce sesli uyarı
bash — ssl_check.sh
#!/bin/bash # /opt/scripts/ssl_check.sh ALERTALK_KEY="YOUR_WEBHOOK_KEY" PHONE="5XXXXXXXXX" HOSTNAME=$(hostname) WARNING_DAYS=30 # kac gun kala uyari verilsin # Kontrol edilecek domainler DOMAINS=("alertalk.net" "example.com" "api.myapp.com") for domain in "${DOMAINS[@]}"; do # SSL sertifika bitis tarihini al expiry=$(echo | openssl s_client -servername "${domain}" \ -connect "${domain}:443" 2>/dev/null \ | openssl x509 -noout -enddate 2>/dev/null \ | cut -d= -f2) if [ -z "${expiry}" ]; then # Sertifikaya ulasilamiyor curl -s -X POST "https://tr.alertalk.net/webhook/receive" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${PHONE}\",\"error_message\":\"${domain} SSL sertifikasina ulasilamiyor\"}" \ --max-time 10 --silent continue fi # Kalan gun hesapla expiry_epoch=$(date -d "${expiry}" +%s 2>/dev/null || date -j -f "%b %d %T %Y %Z" "${expiry}" +%s) now_epoch=$(date +%s) days_left=$(( (expiry_epoch - now_epoch) / 86400 )) if [ "${days_left}" -le $WARNING_DAYS ]; then curl -s -X POST "https://tr.alertalk.net/webhook/receive" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${PHONE}\",\"error_message\":\"${domain} SSL sertifikasi ${days_left} gun icinde sona eriyor\"}" \ --max-time 10 --silent fi done
crontab -e — her gün sabah 09:00
0 9 * * * /bin/bash /opt/scripts/ssl_check.shWebsite Uptime İzleme
curl ile HTTP durum kodu kontrolü, erişilemeyen sitede sesli alarm
bash — uptime_check.sh
#!/bin/bash # /opt/scripts/uptime_check.sh ALERTALK_KEY="YOUR_WEBHOOK_KEY" PHONE="5XXXXXXXXX" HOSTNAME=$(hostname) # Izlenecek siteler SITES=("https://alertalk.net" "https://api.myapp.com/health") for site in "${SITES[@]}"; do http_code=$(curl -s -o /dev/null -w "%{http_code}" \ --max-time 10 \ --retry 2 \ "${site}") if [ "${http_code}" != "200" ]; then # 200 degil — alarm msg="${site} erisemiyor (HTTP ${http_code}) - ${HOSTNAME}" curl -s -X POST "https://tr.alertalk.net/webhook/receive" \ -H "Content-Type: application/json" \ -H "X-Webhook-Key: ${ALERTALK_KEY}" \ -d "{\"phone_number\":\"${PHONE}\",\"error_message\":\"${msg}\"}" \ --max-time 10 --silent fi done
crontab -e — her 3 dakika
*/3 * * * * /bin/bash /opt/scripts/uptime_check.sh
Alertalk'ın kendi website izleme modülü Ankara ve Gebze'den çift probe ile kontrol yapar. Manuel script yerine panelden website ekleyebilirsiniz.