[BUG] the carbon returner has a type error

[kresike]

Description There is a type error in the carbon returner, probably caused by the python2 -> python3 migration that has not been handled yet.

Setup One needs to set up a carbon instance for the carbon returner and schedule a munin plugin to be run by the salt-minion scheduler to run any munin plugin on the machine in question and return data using the carbon returner.

Please be as specific as possible and give set-up details.

• [ X] on-prem machine
• [ ] VM (Virtualbox, KVM, etc. please specify)
• [ ] VM running on a cloud service, please be explicit and add details
• [ ] container (Kubernetes, Docker, containerd, etc. please specify)
• [ ] or a combination, please be explicit
• [ ] jails if it is FreeBSD

Steps to Reproduce the behavior Add the following to minion.conf

carbon.host: 10.0.0.1
carbon.port: 2003
carbon.mode: text
schedule:
    munin:
        function: munin.run
        args:
            - cpu
        seconds: 60
        returner: carbon

Restart the salt minion and wait for the scheduler to run. In the logs the error below appears:

2021-11-23 11:42:33,024 [salt.utils.schedule:875 ][ERROR   ][4032195] Unhandled exception running munin.run
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/salt/utils/schedule.py", line 866, in handle_func
    self.returners[ret_str](ret)
  File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 149, in __call__
    return self.loader.run(run_func, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 1201, in run
    return self._last_context.run(self._run_as, _func_or_method, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/salt/loader/lazy.py", line 1216, in _run_as
    return _func_or_method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/salt/returners/carbon_return.py", line 297, in returner
    _send(saltdata, metric_base, opts)
  File "/usr/lib/python3/dist-packages/salt/returners/carbon_return.py", line 255, in _send
    sent_bytes = sock.send(data[total_sent_bytes:])
TypeError: a bytes-like object is required, not 'str'

Expected behavior The data should be sent to the graphite instance.

Screenshots None.

Versions Report

Salt Version:
          Salt: 3004
 
Dependency Versions:
          cffi: Not Installed
      cherrypy: Not Installed
      dateutil: 2.8.1
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 2.11.3
       libgit2: Not Installed
      M2Crypto: Not Installed
          Mako: Not Installed
       msgpack: 1.0.0
  msgpack-pure: Not Installed
  mysql-python: 1.4.4
     pycparser: Not Installed
      pycrypto: Not Installed
  pycryptodome: 3.9.7
        pygit2: Not Installed
        Python: 3.9.2 (default, Feb 28 2021, 17:03:44)
  python-gnupg: Not Installed
        PyYAML: 5.3.1
         PyZMQ: 20.0.0
         smmap: Not Installed
       timelib: Not Installed
       Tornado: 4.5.3
           ZMQ: 4.3.4
 
System Versions:
          dist: debian 11 bullseye
        locale: utf-8
       machine: x86_64
       release: 5.10.0-8-amd64
        system: Linux
       version: Debian GNU/Linux 11 bullseye

Additional context I will post a pull request with a very simple fix to this problem.

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[garethgreenaway]

@kresike Thanks for the report. It appears that your open PR is against your own fork of Salt, did you mean to open that against the Salt repo?

[kresike]

Oops, sorry abou that. Let me fix that.

[kresike]

@garethgreenaway I've created a new one, this one looks better. Sorry about that!