feat: add cluster_info function

main.py

@@ -1,11 +1,8 @@
+import select
+import sys
 from src.parser import get_args
 from src.node_manager import NodeManager
 
-actions = [
-        {'explanation': 'Add another node into our cluster', 'function': 'add_node'},
-        {'explanation': 'Exit', 'function': 'exit'},
-    ]
-
 if __name__ == '__main__':
     args = get_args()
     host, port = args.host, args.port
@@ -14,24 +11,34 @@ if __name__ == '__main__':
     manager.start_service()
 
 
-    while True:
+    is_run = True
+    while is_run:
         explanation = '=' * 30 + '\n'
-        for index, action in enumerate(actions):
+        for index, action in enumerate(manager.actions):
             explanation += f'{index+1}) {action["explanation"]}\n'
         explanation += '=' * 30
         explanation += '\n> '
+        print(explanation, end='')
 
-        action = input(explanation)
+        while True:
+            if sys.stdin.closed:
+                sys.stdin = open(0)
 
-        try:
-            action = actions[int(action)-1]
-            if action['function'] == 'exit':
-                break
-            else:
-                func = getattr(manager, action['function'])
-                func()
-        except:
-            None
+            read_list, _, _ = select.select([sys.stdin], [], [], 1)
+
+            if read_list:
+                action = sys.stdin.readline()
+                try:
+                    action = manager.actions[int(action)-1]
+                    if action['function'] == 'exit':
+                        manager.exit()
+                        is_run = False
+                    else:
+                        func = getattr(manager, action['function'])
+                        func()
+                    break
+                except:
+                    break
 
         print("\n\n\n")
     print("Stopped")

src/communication.py

@@ -1,28 +1,136 @@
 import socket
+import json
+from variables import actions
 
-'''
 class ClusterCommunicationModule():
-    def __init__(self, host, port):
-'''
+    def __init__(self, host, port, node_manager):
+        # TCP server
+        # In our implementation, the master node link to the worker's TCP server.
+        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 
-class ServiceExplorationModule():
-    def __init__(self, host, port):
-        # UDP server
-        self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
+        self.client_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         self.host = host
         self.port = port
         self.IP = socket.gethostbyname(socket.gethostname())
-        self.is_available = True
+
+        self.node_manager = node_manager
+        self.worker_conns = []
 
     def listen(self):
         self.sock.bind((self.host, self.port))
-        # print(f"Exploration Server(UDP) listening on {self.host}:{self.port}...")
+        self.sock.listen(1)
+        print(f"Communication Server(TCP) listening on {self.host}:{self.port}...")
+
+        while True:
+            conn, addr = self.sock.accept()
+            
+            # first request, we should approve the request
+            data = conn.recv(1024)
+            data = data.decode()
+
+            if data == '[REQUEST]':             # worker side
+                cont = self.process_request(conn, addr)
+                if cont:
+                    while True:
+                        # Start receive command
+                        data = self.client_sock.recv(1024)
+                        data = data.decode()
+
+                        cont = self.handle_command(data)
+                        if not cont:
+                            break
+            elif data == '[CHECK]':             # master side
+                self.worker_conns.append(conn)
+                continue
+
+            conn.close()
+
+    def process_request(self, conn, addr):      # worker side
+        if self.node_manager.status == 'none':
+            conn.send('[ACCEPT]'.encode())
+            conn.close()
+            self.client_sock.connect((addr[0], self.port))
+            self.client_sock.send('[CHECK]'.encode())
+
+            # remove 'add node'
+            self.node_manager.actions = self.node_manager.actions[1:]
+
+            self.node_manager.status = 'worker'
+            print(f'You are in {addr} cluster now.\nPlease type in Enter to continue')
+            return True
+        else:
+            conn.send('[REJECT]'.encode())
+            print(f'You just reject the cluster invitation from {addr} now.\nPlease type in Enter to continue')
+            return False
+
+    def handle_command(self, data):
+        command, args = data.split()
+        if command == '[INFO]':
+            data = {'host': self.IP, 'GPU': self.node_manager.GPU, 'GPU_num': self.node_manager.GPU_num}
+            self.client_sock.send(json.dumps(data).encode())
+            
+        return True
+
+    def request(self, host):                    # master side
+        self.client_sock.connect((host, self.port))
+        self.client_sock.send('[REQUEST]'.encode())
+        data = self.client_sock.recv(1024)
+        data = data.decode()
+
+        # close client_sock, and waiting for the worker connect to our self.sock
+        self.client_sock.close()
+        self.client_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+
+        if data == '[REJECT]':
+            print(f"{host} reject.")
+            return False
+        elif data == '[ACCEPT]':
+            self.node_manager.status = 'master'
+
+            print(f"{host} accept.")
+            return True
+    
+    def cluster_info(self):
+        ans = []
+        for conn in self.worker_conns:
+            try:
+                conn.send('[INFO] {}'.encode())
+                data = conn.recv(1024)
+                data = json.loads(data.decode())
+                ans.append(data)
+            except:
+                self.worker_conns.remove(conn)
+        return ans
+
+    def exit(self):
+        self.sock.close()
+        self.client_sock.close()
+        for conn in self.worker_conns:
+            conn.close()
+        
+
+class ServiceExplorationModule():
+    def __init__(self, host, port, node_manager):
+        # UDP server
+        self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
+        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+
+        self.host = host
+        self.port = port
+        self.IP = socket.gethostbyname(socket.gethostname())
+
+        self.node_manager = node_manager
+
+    def listen(self):
+        self.sock.bind((self.host, self.port))
+        print(f"Exploration Server(UDP) listening on {self.host}:{self.port}...")
 
         while True:
             data, addr = self.sock.recvfrom(1024)
 
-            if self.is_available:
+            if self.node_manager.status == 'none':
                 if data.decode() == '[EXPLORE]':
                     self.sock.sendto(self.IP.encode(), addr)
 
@@ -32,7 +140,7 @@ class ServiceExplorationModule():
         client_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
         client_sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
 
-        client_sock.settimeout(3)
+        client_sock.settimeout(1)
         client_sock.sendto('[EXPLORE]'.encode(), ('255.255.255.255', self.port))
 
         while True:
@@ -45,5 +153,5 @@ class ServiceExplorationModule():
                 break
         return available_host
 
-    def change_available(self, new_status):
-        self.is_available = new_status
+    def exit(self):
+        self.sock.close()

src/node_manager.py

@@ -1,16 +1,33 @@
 import threading
-from src.communication import ServiceExplorationModule
+from src.communication import ServiceExplorationModule, ClusterCommunicationModule
 import time
 
+
 class NodeManager():
     def __init__(self, host, port):
         self.status = 'none'
+        self.actions = [
+            {'explanation': 'Add another node into our cluster', 'function': 'add_node'},
+            {'explanation': 'Exit', 'function': 'exit'},
+        ]
+        self.GPU = 'RTX 4090'
+        self.GPU_num = 1
+
+        # start Cluster Communication Module
+        # let the nodes in the cluster can communicate
+        self.cluster_communication_module = ClusterCommunicationModule(host, port, self)
+
         # start Service Exploration Module
         # let all client can know which IP address has our service so that it can link to.
-        self.service_exploration_module = ServiceExplorationModule(host, port+1)
-        time.sleep(1)
+        self.service_exploration_module = ServiceExplorationModule(host, port+1, self)
+
+        time.sleep(2)
     
     def start_service(self):
+        communication_thread = threading.Thread(target=self.cluster_communication_module.listen)
+        communication_thread.daemon = True
+        communication_thread.start()
+
         explore_service_thread = threading.Thread(target=self.service_exploration_module.listen)
         explore_service_thread.daemon = True
         explore_service_thread.start()
@@ -25,9 +42,29 @@ class NodeManager():
             choose = input(msg)
             try:
                 choose = int(choose)-1
-                print(f"Link to {hosts[choose]}")
+                accept = self.cluster_communication_module.request(hosts[choose])
+                if accept:
+                    exit_func = self.actions[-1]
+                    self.actions = self.actions[:-1]
+                    info_func = {'explanation': 'cluster info', 'function': 'cluster_info'}
+                    if info_func not in self.actions:
+                        self.actions.append(info_func)
+                    self.actions.append(exit_func)
             except:
                 print("=== FAIL ===")
         else:
             print("No other nodes in your subnet.")
+
+    def cluster_info(self):
+        info = self.cluster_communication_module.cluster_info()
+        print(f"\nThere are {len(info)+1} nodes in this cluster.")
+        print("Cluster Info:")
+        print(f"    {self.service_exploration_module.IP}(local) -> {self.GPU} * {self.GPU_num}")
+        for host in info:
+            print(f"    {host['host']} -> {host['GPU']} * {host['GPU_num']}")
+    
+    def exit(self):
+        self.cluster_communication_module.exit()
+        self.service_exploration_module.exit()
+