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3 changed files with 46 additions and 7 deletions
42
README.md
42
README.md
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@ -27,6 +27,46 @@ You'll need to edit the kubeconfig file and change the api host to be your local
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## How to use it
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### Pod
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Launch a pod (through a deployment, or sts, or something else) on your cluster.
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You can use the following image `forge.k3s.fr/frank/kube-escape:latest`
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Don't forget to give it the following env values:
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- WEBSOCKET_ROOT_URL
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- WS_ID: facultative, can auto generate itself
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Then look at its logs and you'll see the ws url to use when connecting to it
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### WS Proxy
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You should spawn a WS proxy that will receive connections from the client and the pod.
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It should be accessible by both.
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You can override the command of the image and use `./proxy.py`
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### Client
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Launch your client with:
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```bash
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./client.py <ws_URL_given_by_pod>
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```
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This will open a listening socket on localhost port 6443
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### Kubectl
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Change your kubeconfig's server to `https://localhost:6443`
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And then, enjoy!
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## Considerations
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### Security
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### Security
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I guess you could proxy your websockets through an HTTPs endpoint. Wouldn't be bad.
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I guess you could proxy your websockets through an HTTPs endpoint. Wouldn't be bad.
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@ -35,4 +75,4 @@ However, the kubeapi proto is already over TLS, so it wouldn't add much value.
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### Compression
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### Compression
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Sadly it's not really possible (efficient-wise) to compress TLS data as it looks
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Sadly it's not really possible (efficient-wise) to compress TLS data as it looks
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random-ish.
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random-ish.
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7
pod.py
7
pod.py
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@ -16,7 +16,7 @@ async def handle_socket_read(socketid, tcpreader, ws):
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print(f"New socket: {socketid}. Waiting on recv")
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print(f"New socket: {socketid}. Waiting on recv")
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while True:
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while True:
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data = await tcpreader.read(2024)
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data = await tcpreader.read(2024)
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print(f"TCP@{socketid} Received {len(data)} bytes")
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#print(f"TCP@{socketid} Received {len(data)} bytes")
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if data == b'':
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if data == b'':
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print(f"TCP@{socketid} Connection closed")
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print(f"TCP@{socketid} Connection closed")
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c = conn.WSMsg(socketid, conn.MsgType.DISCONNECT)
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c = conn.WSMsg(socketid, conn.MsgType.DISCONNECT)
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@ -24,7 +24,7 @@ async def handle_socket_read(socketid, tcpreader, ws):
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break
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break
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c = conn.WSMsg(socketid, conn.MsgType.DATA, data)
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c = conn.WSMsg(socketid, conn.MsgType.DATA, data)
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print(f'TCP>WS: {c}')
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#print(f'TCP>WS: {c}')
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await ws.send(c.to_bytes())
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await ws.send(c.to_bytes())
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except Exception as e:
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except Exception as e:
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@ -62,9 +62,8 @@ async def handle_ws_incoming(cfg, ws, sockets):
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elif c.msg == conn.MsgType.DATA:
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elif c.msg == conn.MsgType.DATA:
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tcpreader, tcpwriter = sockets[socketid]
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tcpreader, tcpwriter = sockets[socketid]
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print(f'WS>TCP: {c}')
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#print(f'WS>TCP: {c}')
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tcpwriter.write(c.payload)
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tcpwriter.write(c.payload)
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print('written')
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def get_config():
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def get_config():
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4
proxy.py
4
proxy.py
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@ -29,12 +29,12 @@ async def handler(websocket):
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print(f"Connection closed: {e}")
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print(f"Connection closed: {e}")
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finally:
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finally:
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# Unregister the client
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# Unregister the client
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connected_clients.remove(websocket)
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connected_clients.get(websocket.request.path, set()).remove(websocket)
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async def main():
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async def main():
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# Start the WebSocket server
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# Start the WebSocket server
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ws_port = os.environ.get("WS_PORT", 9999)
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ws_port = os.environ.get("WS_PORT", 9999)
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server = await websockets.asyncio.server.serve(handler, "::", ws_port)
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server = await websockets.asyncio.server.serve(handler, "", ws_port)
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print(f"WebSocket server listening on ws://[::]:{ws_port}")
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print(f"WebSocket server listening on ws://[::]:{ws_port}")
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await server.wait_closed()
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await server.wait_closed()
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