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-rwxr-xr-xsrc/op_mode/reverseproxy.py239
1 files changed, 239 insertions, 0 deletions
diff --git a/src/op_mode/reverseproxy.py b/src/op_mode/reverseproxy.py
new file mode 100755
index 000000000..44ffd7a37
--- /dev/null
+++ b/src/op_mode/reverseproxy.py
@@ -0,0 +1,239 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2023 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import json
+import socket
+import sys
+import typing
+
+from sys import exit
+from tabulate import tabulate
+from vyos.configquery import ConfigTreeQuery
+
+import vyos.opmode
+
+socket_path = '/run/haproxy/admin.sock'
+timeout = 5
+
+
+def _execute_haproxy_command(command):
+ """Execute a command on the HAProxy UNIX socket and retrieve the response.
+
+ Args:
+ command (str): The command to be executed.
+
+ Returns:
+ str: The response received from the HAProxy UNIX socket.
+
+ Raises:
+ socket.error: If there is an error while connecting or communicating with the socket.
+
+ Finally:
+ Closes the socket connection.
+
+ Notes:
+ - HAProxy expects a newline character at the end of the command.
+ - The socket connection is established using the HAProxy UNIX socket.
+ - The response from the socket is received and decoded.
+
+ Example:
+ response = _execute_haproxy_command('show stat')
+ print(response)
+ """
+ try:
+ # HAProxy expects new line for command
+ command = f'{command}\n'
+
+ # Connect to the HAProxy UNIX socket
+ sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+ sock.connect(socket_path)
+
+ # Set the socket timeout
+ sock.settimeout(timeout)
+
+ # Send the command
+ sock.sendall(command.encode())
+
+ # Receive and decode the response
+ response = b''
+ while True:
+ data = sock.recv(4096)
+ if not data:
+ break
+ response += data
+ response = response.decode()
+
+ return (response)
+
+ except socket.error as e:
+ print(f"Error: {e}")
+
+ finally:
+ # Close the socket
+ sock.close()
+
+
+def _convert_seconds(seconds):
+ """Convert seconds to days, hours, minutes, and seconds.
+
+ Args:
+ seconds (int): The number of seconds to convert.
+
+ Returns:
+ tuple: A tuple containing the number of days, hours, minutes, and seconds.
+ """
+ minutes = seconds // 60
+ hours = minutes // 60
+ days = hours // 24
+
+ return days, hours % 24, minutes % 60, seconds % 60
+
+
+def _last_change_format(seconds):
+ """Format the time components into a string representation.
+
+ Args:
+ seconds (int): The total number of seconds.
+
+ Returns:
+ str: The formatted time string with days, hours, minutes, and seconds.
+
+ Examples:
+ >>> _last_change_format(1434)
+ '23m54s'
+ >>> _last_change_format(93734)
+ '1d0h23m54s'
+ >>> _last_change_format(85434)
+ '23h23m54s'
+ """
+ days, hours, minutes, seconds = _convert_seconds(seconds)
+ time_format = ""
+
+ if days:
+ time_format += f"{days}d"
+ if hours:
+ time_format += f"{hours}h"
+ if minutes:
+ time_format += f"{minutes}m"
+ if seconds:
+ time_format += f"{seconds}s"
+
+ return time_format
+
+
+def _get_json_data():
+ """Get haproxy data format JSON"""
+ return _execute_haproxy_command('show stat json')
+
+
+def _get_raw_data():
+ """Retrieve raw data from JSON and organize it into a dictionary.
+
+ Returns:
+ dict: A dictionary containing the organized data categorized
+ into frontend, backend, and server.
+ """
+
+ data = json.loads(_get_json_data())
+ lb_dict = {'frontend': [], 'backend': [], 'server': []}
+
+ for key in data:
+ frontend = []
+ backend = []
+ server = []
+ for entry in key:
+ obj_type = entry['objType'].lower()
+ position = entry['field']['pos']
+ name = entry['field']['name']
+ value = entry['value']['value']
+
+ dict_entry = {'pos': position, 'name': {name: value}}
+
+ if obj_type == 'frontend':
+ frontend.append(dict_entry)
+ elif obj_type == 'backend':
+ backend.append(dict_entry)
+ elif obj_type == 'server':
+ server.append(dict_entry)
+
+ if len(frontend) > 0:
+ lb_dict['frontend'].append(frontend)
+ if len(backend) > 0:
+ lb_dict['backend'].append(backend)
+ if len(server) > 0:
+ lb_dict['server'].append(server)
+
+ return lb_dict
+
+
+def _get_formatted_output(data):
+ """
+ Format the data into a tabulated output.
+
+ Args:
+ data (dict): The data to be formatted.
+
+ Returns:
+ str: The tabulated output representing the formatted data.
+ """
+ table = []
+ headers = [
+ "Proxy name", "Role", "Status", "Req rate", "Resp time", "Last change"
+ ]
+
+ for key in data:
+ for item in data[key]:
+ row = [None] * len(headers)
+
+ for element in item:
+ if 'pxname' in element['name']:
+ row[0] = element['name']['pxname']
+ elif 'svname' in element['name']:
+ row[1] = element['name']['svname']
+ elif 'status' in element['name']:
+ row[2] = element['name']['status']
+ elif 'req_rate' in element['name']:
+ row[3] = element['name']['req_rate']
+ elif 'rtime' in element['name']:
+ row[4] = f"{element['name']['rtime']} ms"
+ elif 'lastchg' in element['name']:
+ row[5] = _last_change_format(element['name']['lastchg'])
+ table.append(row)
+
+ out = tabulate(table, headers, numalign="left")
+ return out
+
+
+def show(raw: bool):
+ config = ConfigTreeQuery()
+ if not config.exists('load-balancing reverse-proxy'):
+ raise vyos.opmode.UnconfiguredSubsystem('Reverse-proxy is not configured')
+
+ data = _get_raw_data()
+ if raw:
+ return data
+ else:
+ return _get_formatted_output(data)
+
+
+if __name__ == '__main__':
+ try:
+ res = vyos.opmode.run(sys.modules[__name__])
+ if res:
+ print(res)
+ except (ValueError, vyos.opmode.Error) as e:
+ print(e)
+ sys.exit(1)