zerodeploy not working with my custom service

[arnav224]

Can't run rpyc zerodeploy with basic service I define.
All the examples I found for zerodeploy uses conn = server.classic_connect() which uses some default rpyc service.

I want to deploy my custom service in the remote machine. I tried this code:

import sys
import rpyc
from rpyc.utils.zerodeploy import DeployedServer
from plumbum import SshMachine

HOST_NAME = "****"
USER_NAME = "****"

# $ ssh-keygen -t ed25519
# $ ssh-copy-id user@hostname
ssh_machine = SshMachine(host=HOST_NAME, user=USER_NAME, keyfile='~/.ssh/id_ed25519')

server = DeployedServer(remote_machine=ssh_machine)

class MyService(rpyc.ClassicService):
    ALIASES = ["foo", "bar"]
    def exposed_add(self, a, b):
        return a + b

config = {"allow_all_attrs": True, 'allow_exposed_attrs': True}

# Here I'm trying to use My service
conn = server.connect(service=MyService, config=config)

print(f'1. rpyc.__version__={rpyc.__version__}')
print(f'2. local platform: {sys.platform}')
print(f'3. local python version: {sys.version}')

print(f'4. aliases: {conn.root.get_service_aliases()}')
print(f'5. remote platform: {conn.modules.sys.platform}')
print(f'6. remote python version: {conn.modules.sys.version}')
print(f'7. {conn.root.add(4, 7)}')

server.close()

And I'm getting error for the last (7) print:

1. rpyc.__version__=(5, 0, 1)
2. local platform: linux
3. local python version: 3.7.6 (default, Jan 30 2020, 10:29:04) 
[GCC 9.2.1 20190827 (Red Hat 9.2.1-1)]
4. aliases: ('SLAVE',)
5. remote platform: linux
6. remote python version: 3.7.6 (default, Jan 30 2020, 10:29:04) 
[GCC 9.2.1 20190827 (Red Hat 9.2.1-1)]
Traceback (most recent call last):
  File "/home/****/pythonPlayGround/rpyc_try/rpyc_try.py", line 53, in <module>
    print(f'7. {conn.root.add(4, 7)}')
  File "/home/****/.local/lib/python3.7/site-packages/rpyc/core/netref.py", line 153, in __getattr__
    return syncreq(self, consts.HANDLE_GETATTR, name)
  File "/home/****/.local/lib/python3.7/site-packages/rpyc/core/netref.py", line 63, in syncreq
    return conn.sync_request(handler, proxy, *args)
  File "/home/****/.local/lib/python3.7/site-packages/rpyc/core/protocol.py", line 473, in sync_request
    return self.async_request(handler, *args, timeout=timeout).value
  File "/home/****/.local/lib/python3.7/site-packages/rpyc/core/async_.py", line 102, in value
    raise self._obj
AttributeError: 'SlaveService' object has no attribute 'add'

========= Remote Traceback (1) =========
Traceback (most recent call last):
  File "/home/****/tmp.PPeuiZhBA8/rpyc/core/protocol.py", line 324, in _dispatch_request
    res = self._HANDLERS[handler](self, *args)
  File "/home/****/tmp.PPeuiZhBA8/rpyc/core/protocol.py", line 608, in _handle_getattr
    return self._access_attr(obj, name, (), "_rpyc_getattr", "allow_getattr", getattr)
  File "/home/****/tmp.PPeuiZhBA8/rpyc/core/protocol.py", line 536, in _access_attr
    return accessor(obj, name, *args)
AttributeError: 'SlaveService' object has no attribute 'add'

Judging by the aliases: ('SLAVE',) I would think that the remote service is not MyService, but if I change MyService to inherit from rpyc.Service instead of rpyc.ClassicService I'm getting the error AttributeError: 'Connection' object has no attribute 'modules' for the second print, so it is MyService (but it's not working as expected).

Also when I override the on_connect() in MyService it's not running.

backgroung:
I want my code to be able to run on any remote machine with no prerequisites.
My other option (which I used before) is to send a server_code.py file and run it (all using SSH), the server_code will run MyService like this: server = rpyc.ThreadedServer(MyService, ..).
I don't like this solution. I need to deal with pip install rpyc, with the temp directory and manage the connection myself. I don't think this is the right way.
rpyc zerodeploy should deal with all of it for me, right?

[arnav224]

Do you know if anyone in the world has really used zerodeploy? Or is it broken and I should give up? I would think it's a problem in my side but I did not find anyone who used it, in all GitHub, isn't it weird?

[comrumino]

I assure you that zerodeploy has been used and loved by some users. #377 show that users have had success with it---I'd go through their blog on remote testing. I'll see if I can carve out time soon.