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

[DO-638]

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

imap_exporter/imap_exporter.py

@@ -0,0 +1,38 @@
+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)