feature/DO-638--imap_monitoring (!4)

[DO-638]

Reviewed-on: https://git.avroid.tech/DevOps/avroid_scripts/pulls/4

imap_exporter/Dockerfile

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+FROM python:3.12.3-alpine
+
+COPY ["requirements.txt", "imap_exporter.py", "./"]
+
+RUN apk add openssl
+
+RUN python3 -m pip install -r requirements.txt --no-cache-dir
+
+EXPOSE 9119
+
+CMD ["python", "-u", "imap_exporter.py"]

imap_exporter/imap_exporter.py

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+import time
+import os
+import re
+import subprocess
+from prometheus_client import start_http_server, Gauge
+
+
+rs = r"CN=\*.avroid.tech"
+host = os.environ.get("IMAP_HOST", "imap-app.avroid.tech:993")
+re_search = os.environ.get("RE_SEARCH", rs)
+
+# Create a metric to track time spent and requests made.
+g = Gauge('connection_success', 'Подключение к imap серверу', ["imap_host"])
+
+def get_connection_status(imap_host):
+    try:
+        response = subprocess.check_output(f"openssl s_client -connect {imap_host} > /dev/null < /dev/null", shell=True,stderr=subprocess.STDOUT)
+    except subprocess.CalledProcessError as e:
+        response = e.output
+
+    text_response = response.decode('utf-8')
+
+    if re.search(re_search, text_response):
+        print(f"Connection to {host} successfull")
+        connection_status = 1
+    else:
+        print(f"Connection to {host} failure")
+        connection_status = 0
+    return connection_status
+
+
+if __name__ == '__main__':
+    # Start up the server to expose the metrics.
+    start_http_server(9120)
+    while True:
+        cs = get_connection_status(host)
+        g.labels(host).set(cs)
+        time.sleep(5)

imap_exporter/requirements.txt

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+prometheus_client==0.20.0

imap_exporter/restart_imap.sh

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+#!/bin/bash
+
+# Переменная для tmp lock-файла
+LOCK_FILE="/tmp/restart_imap.lock"
+
+# Функция для проверки блокировки
+check_lock() {
+    if [ -f "$LOCK_FILE" ]; then
+        echo "$(date) Скрипт уже запущен, выход..." >> /var/log/restart_imap.log
+        exit 1
+    fi
+}
+
+# Функция для установки блокировки
+set_lock() {
+    touch "$LOCK_FILE"
+}
+
+# Функция для удаления блокировки
+remove_lock() {
+    rm -f "$LOCK_FILE"
+}
+
+# Основной код скрипта
+check_lock
+set_lock
+
+openssl s_client -connect imap-app.avroid.tech:993 > /dev/null < /dev/null > /dev/null 2>&1
+if [ $? -ne 0 ]; then
+    echo "$(date) Restart imap docker container" >> /var/log/restart_imap.log
+    docker restart imap
+fi
+
+remove_lock