feat(agent): refactor LLM configuration to support new llm_model_configs system

- Remove direct logging of LLM config from gns3_copilot.py
- Update model_factory to accept configuration from llm_model_configs dictionary
- Add fallback to environment variables for backward compatibility
- Centralize configuration loading in _load_llm_config function

gns3server/agent/gns3_copilot/tools_v2/config_tools_nornir.py

@@ -5,6 +5,7 @@ This module provides a tool to execute configuration commands on multiple device
 
 import json
 import logging
+import os
 from typing import Any
 
 from langchain.tools import BaseTool
@@ -15,10 +16,7 @@ from nornir.core import Nornir
 from nornir.core.task import AggregatedResult, Result, Task
 from nornir_netmiko.tasks import netmiko_send_config
 
-from gns3_copilot.utils import (
-    get_config,
-    get_device_ports_from_topology,
-)
+from gns3_copilot.utils import get_device_ports_from_topology
 
 # config log
 logger = logging.getLogger(__name__)
@@ -35,10 +33,10 @@ def _get_nornir_groups_config() -> dict[str, dict[str, Any]]:
     return {
         "cisco_IOSv_telnet": {
             "platform": "cisco_ios",
-            "hostname": get_config("GNS3_SERVER_HOST"),
+            "hostname": os.getenv("GNS3_SERVER_HOST", "127.0.0.1"),
             "timeout": 120,
-            "username": get_config("GNS3_SERVER_USERNAME"),
-            "password": get_config("GNS3_SERVER_PASSWORD"),
+            "username": os.getenv("GNS3_SERVER_USERNAME", ""),
+            "password": os.getenv("GNS3_SERVER_PASSWORD", ""),
             "connection_options": {
                 "netmiko": {"extras": {"device_type": "cisco_ios_telnet"}}
             },
@@ -373,7 +371,7 @@ class ExecuteMultipleDeviceConfigCommands(BaseTool):
             defaults = _get_nornir_defaults()
 
             # Log nornir account information
-            gns3_host = get_config("GNS3_SERVER_HOST")
+            gns3_host = os.getenv("GNS3_SERVER_HOST", "127.0.0.1")
 
             logger.info(
                 "Initializing Nornir with account: host=%s, platform=%s, timeout=%d",

gns3server/agent/gns3_copilot/tools_v2/display_tools_nornir.py

@@ -5,6 +5,7 @@ This module provides a tool to execute display commands on multiple devices
 
 import json
 import logging
+import os
 import re
 from typing import Any
 
@@ -16,10 +17,7 @@ from nornir.core import Nornir
 from nornir.core.task import AggregatedResult, Result, Task
 from nornir_netmiko.tasks import netmiko_multiline
 
-from gns3_copilot.utils import (
-    get_config,
-    get_device_ports_from_topology,
-)
+from gns3_copilot.utils import get_device_ports_from_topology
 
 # config log
 logger = logging.getLogger(__name__)
@@ -36,10 +34,10 @@ def _get_nornir_groups_config() -> dict[str, dict[str, Any]]:
     return {
         "cisco_IOSv_telnet": {
             "platform": "cisco_ios",
-            "hostname": get_config("GNS3_SERVER_HOST"),
+            "hostname": os.getenv("GNS3_SERVER_HOST", "127.0.0.1"),
             "timeout": 120,
-            "username": get_config("GNS3_SERVER_USERNAME"),
-            "password": get_config("GNS3_SERVER_PASSWORD"),
+            "username": os.getenv("GNS3_SERVER_USERNAME", ""),
+            "password": os.getenv("GNS3_SERVER_PASSWORD", ""),
             "connection_options": {
                 "netmiko": {"extras": {"device_type": "cisco_ios_telnet"}}
             },
@@ -387,7 +385,7 @@ class ExecuteMultipleDeviceCommands(BaseTool):
             defaults = _get_nornir_defaults()
 
             # Log nornir account information
-            gns3_host = get_config("GNS3_SERVER_HOST")
+            gns3_host = os.getenv("GNS3_SERVER_HOST", "127.0.0.1")
 
             logger.info(
                 "Initializing Nornir with account: host=%s, platform=%s, timeout=%d",

gns3server/agent/gns3_copilot/tools_v2/linux_tools_nornir.py

@@ -5,6 +5,7 @@ via Telnet console.
 
 import json
 import logging
+import os
 import re
 import time
 from typing import Any
@@ -16,10 +17,7 @@ from nornir.core import Nornir
 from nornir.core.task import AggregatedResult, Result, Task
 from nornir_netmiko.tasks import netmiko_send_command
 
-from gns3_copilot.utils import (
-    get_config,
-    get_device_ports_from_topology,
-)
+from gns3_copilot.utils import get_device_ports_from_topology
 
 # config log
 logger = logging.getLogger(__name__)
@@ -36,10 +34,10 @@ def _get_nornir_groups_config() -> dict[str, dict[str, Any]]:
     return {
         "linux_telnet": {
             "platform": "linux",
-            "hostname": get_config("GNS3_SERVER_HOST"),
+            "hostname": os.getenv("GNS3_SERVER_HOST", "127.0.0.1"),
             "timeout": 120,
-            "username": get_config("LINUX_TELNET_USERNAME"),
-            "password": get_config("LINUX_TELNET_PASSWORD"),
+            "username": os.getenv("LINUX_TELNET_USERNAME", ""),
+            "password": os.getenv("LINUX_TELNET_PASSWORD", ""),
             "connection_options": {
                 "netmiko": {
                     "platform": "linux",
@@ -172,8 +170,8 @@ class LinuxTelnetBatchTool(BaseTool):
             return device_configs_list
 
         # Check credentials only for valid inputs
-        linux_username = get_config("LINUX_TELNET_USERNAME")
-        linux_password = get_config("LINUX_TELNET_PASSWORD")
+        linux_username = os.getenv("LINUX_TELNET_USERNAME", "")
+        linux_password = os.getenv("LINUX_TELNET_PASSWORD", "")
 
         if not linux_username or not linux_password:
             user_message = (

gns3server/agent/gns3_copilot/tools_v2/vpcs_tools_telnetlib3.py

@@ -5,6 +5,7 @@ Supports concurrent execution of multiple command groups across multiple VPCS de
 
 import json
 import logging
+import os
 import re
 import threading
 from time import sleep
@@ -14,7 +15,7 @@ from langchain.tools import BaseTool
 from langchain_core.callbacks import CallbackManagerForToolRun
 from telnetlib3 import Telnet
 
-from gns3_copilot.utils import get_config, get_device_ports_from_topology
+from gns3_copilot.utils import get_device_ports_from_topology
 
 logger = logging.getLogger(__name__)
 
@@ -357,8 +358,8 @@ class VPCSMultiCommands(BaseTool):
             list(device_ports.keys()),
         )
 
-        # Get host IP from database
-        gns3_host = get_config("GNS3_SERVER_HOST", "127.0.0.1")
+        # Get host IP from environment variable
+        gns3_host = os.getenv("GNS3_SERVER_HOST", "127.0.0.1")
         logger.info("Using GNS3 server host: %s", gns3_host)
 
         # Initialize results list (pre-allocate space for concurrent writes)