Closes issue #15

README.md

@@ -15,4 +15,5 @@ Both CPU/RAM monitoring and URL monitoring can be set on their own monitoring pe
 - sqlServer - the address of the SQL server which to write the data.
 - sqlDatabase - the database to write the data.
 - sqlUsername - the username used to authenticate to the SQL server.
-- sqlPassword - the password used to authenticate to the SQL server. 
+- sqlPassword - the password used to authenticate to the SQL server.
+- logRetentionDays - the maximum age logs should be kept.

config.py

@@ -4,7 +4,7 @@
 
 hostMonitoringPeriod = 1
 urlMonitoringPeriod = 10
-urls = [""]
+urls = ["https://1.1.1.1"]
 urlTimeout = 10
 maxWorkers = 4
 forceNonPOSIXCPU = True
@@ -13,3 +13,4 @@ sqlServer = ''
 sqlDatabase = ''
 sqlUsername = ''
 sqlPassword = ''
+logRetentionDays = '90'

log.py

@@ -23,7 +23,8 @@
 # SOFTWARE.
 
 import pyodbc
-from datetime import datetime
+from config import logRetentionDays
+from datetime import datetime, timedelta
 
 class logsManager:
     
@@ -56,6 +57,7 @@ class logsManager:
         try:
             
             self.insertHost(hostname, ipAddress)
+            self.deleteOldLogs("monutil_hostLogs", "logTime")
             
             conn = pyodbc.connect(self.conn_str)
             cursor = conn.cursor()
@@ -73,6 +75,7 @@ class logsManager:
         try:
 
             self.insertHost(hostname, ipAddress)
+            self.deleteOldLogs("monutil_urlLogs", "logTime")
 
             conn = pyodbc.connect(self.conn_str)
             cursor = conn.cursor()
@@ -85,3 +88,23 @@ class logsManager:
         except pyodbc.Error as ex:
 
             print("Error inserting data into monutil_urlLogs:", ex)
+
+    def deleteOldLogs(self, tableName, logTimeColumn):
+
+        try:
+            
+            conn = pyodbc.connect(self.conn_str)
+            cursor = conn.cursor()
+
+            oldestLogQuery = f"SELECT TOP 1 {logTimeColumn} FROM {tableName} ORDER BY {logTimeColumn} ASC"
+            cursor.execute(oldestLogQuery)
+            oldestLogTime = cursor.fetchone()[0]
+
+            if oldestLogTime is not None and oldestLogTime < datetime.now() - timedelta(days=int(logRetentionDays)):
+
+                deleteQuery = f"DELETE FROM {tableName} WHERE {logTimeColumn} < ?"
+                cursor.execute(deleteQuery, datetime.now() - timedelta(days=int(logRetentionDays)))
+                conn.commit()
+        except pyodbc.Error as ex:
+            
+            print("Error deleting old logs: {}".format(str(ex)))