使用带有debugpy的VS代码无法连接到AWS EC2实例

Question

我用创建了一个简单的测试用例test.py

print('Hello)

Python 3.7.9

我有一个AWS安全组，它在端口22上将我的IP地址列入白名单。我连接到：

ssh -v -2 -L 5678:localhost:5678 -i "~/.ssh/myssh.pem" ec2-user@<external ec2 IP address>

登录后，我按如下方式启动test.py：

$ python3 -m debugpy --listen <ec2 internal IP here>:5678 --wait-for-client -m test  

当我尝试从VS代码(使用F5(连接时，我得到：

debug1: Connection to port 5678 forwarding to localhost port 5678 requested.
debug1: channel 3: new [direct-tcpip]
channel 3: open failed: connect failed: Connection refused
debug1: channel 3: free: direct-tcpip: listening port 5678 for localhost port 5678, connect from 127.0.0.1 port 35636 to 127.0.0.1 port 5678, nchannels 4

我还尝试在一个更复杂的测试用例中使用这种方法，在这段代码之前有一个print语句，它会打印到控制台，这样我就知道应用程序正在正确启动。

# Allow other computers to attach to debugpy at this IP address and port.
debugpy.listen(('<my internal ec2 IP here>', 5678))
# Pause the program until a remote debugger is attached
debugpy.wait_for_client()

在VS代码中，我有这个launch.json

{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "Python: Remote Attach",
"type": "python",
"request": "attach",
"connect": {
"host": "localhost",
"port": 5678
},
"pathMappings": [
{
"localRoot": "${workspaceFolder}",
"remoteRoot": "/home/ec2-user/webapp"
}
]
}
]
}

关于我为什么拒绝连接的想法？

Answer 1

这里的问题是EC2控制台定义了EC2实例的内部IP地址，这就是我指定的。但实际需要的是localhost IP 127.0.0.1，因为ssh隧道在该地址"出现"。