Problem updating from 2.0 to 2.1

Troubleshooting
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1

CMK version: 2.0.0p33 to 2.1.0p22
OS version: Ubuntu Server 20.04

Error message:

OMD[site]:~$ cmk-update-config -v
Initializing application...
ERROR: Please repair this and run "cmk-update-config -v" BEFORE starting the site again.
Traceback (most recent call last):
  File "/omd/sites/site/lib/python3/cmk/update_config.py", line 2186, in main
    has_errors = UpdateConfig(logger, arguments).run()
  File "/omd/sites/site/lib/python3/cmk/update_config.py", line 298, in run
    self._initialize_base_environment()
  File "/omd/sites/site/lib/python3/cmk/update_config.py", line 375, in _initialize_base_environment
    cmk.base.config.load_all_agent_based_plugins(cmk.base.check_api.get_check_api_context)
  File "/omd/sites/site/lib/python3/cmk/base/config.py", line 1528, in load_all_agent_based_plugins
    errors.extend(load_checks(get_check_api_context, filelist))
  File "/omd/sites/site/lib/python3/cmk/base/config.py", line 1680, in load_checks
    return _extract_agent_and_snmp_sections(
  File "/omd/sites/site/lib/python3/cmk/base/config.py", line 2120, in _extract_agent_and_snmp_sections
    create_snmp_section_plugin_from_legacy(
  File "/omd/sites/site/lib/python3/cmk/base/api/agent_based/register/section_plugins_legacy/__init__.py", line 246, in create_snmp_section_plugin_from_legacy
    detect_spec = create_detect_spec(
  File "/omd/sites/site/lib/python3/cmk/base/api/agent_based/register/section_plugins_legacy/convert_scan_functions.py", line 416, in create_detect_spec
    _compute_detect_spec(
  File "/omd/sites/site/lib/python3/cmk/base/api/agent_based/register/section_plugins_legacy/convert_scan_functions.py", line 392, in _compute_detect_spec
    return _ast_convert_dispatcher(expression_ast)
  File "/omd/sites/site/lib/python3/cmk/base/api/agent_based/register/section_plugins_legacy/convert_scan_functions.py", line 342, in _ast_convert_dispatcher
    return _ast_convert_compare(arg)
  File "/omd/sites/site/lib/python3/cmk/base/api/agent_based/register/section_plugins_legacy/convert_scan_functions.py", line 242, in _ast_convert_compare
    return not_equals(
  File "/omd/sites/site/lib/python3/cmk/base/api/agent_based/utils.py", line 208, in not_equals
    return _negate(equals(oidstr, value))
  File "/omd/sites/site/lib/python3/cmk/base/api/agent_based/utils.py", line 166, in equals
    return SNMPDetectSpecification([[(oidstr, "%s" % re.escape(value), True)]])
  File "/omd/sites/site/lib/python3.9/re.py", line 277, in escape
    pattern = str(pattern, 'latin1')
TypeError: decoding to str: need a bytes-like object, NoneType found
OMD[site]:~$

I’m trying to update CheckMK Enterprise from 2.0 to 2.1 but i always get this error message.

It’s telling me, there is an error that by parsing a regex there is a none-object instead of a string. It tells me to repair this, but i can’t find the source for this error. What shall be repaired?

A search in the forum doesn’t provide me any solution for this.
So your help is very apreciated.

Thanks in advance!

2

This means that there is a own SNMP check plugin with detect section that is not valid.
Please have a look at the own made or modified plugins.

3

Okay… Yes, there is a selfmade SNMP-Plugin. I’m going to check this.
Thanks a lot!

4

Indeed it was an SNMP-Plugin - but not the selfdeveloped one.

I had to totally remove the extension package “cmk-ups-1.1.mkp” to finaly be able to upgrade to cmk v2.1. Maybe it was far to old…

Thanks again for your advice!