Feat account management

Created by: eesaanatluri

This PR contains code that helps manage accounts via RMQ agents that block/unblock a user from ssh and running jobs. These agents can be invoked by a command line script. It can also integrate with the flask app that enables user to certify and renew their accounts.

prod_rmq_agents/acct_mgmt_workflow.py

+#!/usr/bin/env python3
+import json
+import rc_util
+import argparse
+import signal
+import uuid
+import pika
+import rc_util
+from rc_rmq import RCRMQ
+import rabbit_config as rcfg
+import time
+
+task = "acctmgr"
+
+# Instantiate rabbitmq object
+rc_rmq = RCRMQ({"exchange": rcfg.Exchange, "exchange_type": "topic"})
+
+tracking = {}
+
+def manage_acct(ch, method, properties, body):
+    msg = json.loads(body)
+    op = method.routing_key.split(".")[1]
+    username = msg["username"]
+    state = msg["state"]
+    service = msg["service"]
+    queuename = msg["queuename"]
+
+    if username in tracking:
+        current = tracking[username]
+    else:
+        current =  tracking[username] = {}
+
+    if op == 'request':
+        if state == 'blocked' or state == 'certification':
+            msg["action"] = "lock"
+        elif state == 'ok':
+            msg["action"] = "unlock"
+        else:
+            print("Invalid state provided. Check the help menu.")
+        
+        if service == 'all':
+            current["new_jobs"] = None
+            current["expire_account"] = None
+            # send a broadcast message to all agents
+            rc_rmq.publish_msg(
+                {
+                    "routing_key": f"{msg['action']}.{queuename}",
+                    "msg":  msg,
+                }
+            )
+        else:
+            for each_service in service:
+                current[each_service] = None
+                rc_rmq.publish_msg(
+                    {
+                        "routing_key": f"{each_service}.{queuename}",
+                        "msg": msg 
+                    }
+                )
+
+
+    elif op == 'done':
+        # Check if each task/agent returned success
+        current[msg["task"]] = msg["success"]
+
+        done = True
+
+        for task in current.keys():
+            if current[task] is None:
+                done = False
+
+        if done:
+            rc_util.update_state(username, state)
+    
+            # Send done msg to account_manager.py
+            rc_rmq.publish_msg(
+                {
+                    "routing_key": f'certified.{queuename}',
+                    "msg": msg,
+                }
+            )
+
+    ch.basic_ack(delivery_tag=method.delivery_tag)
+
+rc_rmq.bind_queue(queue=task, routing_key='acctmgr.request.*', durable=True)
+rc_rmq.bind_queue(queue=task, routing_key='acctmgr.done.*', durable=True)
+
+print("Waiting for completion...")
+rc_rmq.start_consume(
+    {"queue": task, "cb": manage_acct}
+)
+