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I have configured AWS monitoring with Check_MK version 1.5.0p13 (following the documentation at the official Check_MK site). Everything works, except RDS checks, when I go to discover services, I get:

Service discovery failed for this host: 'DBName'

Is there anything I can do to debug this issue, where can I get some more output? Any ideas how to solve this?

This is the output of: 

cmk -vI aws



WARNING: Exception while parsing agent section 'aws_rds_summary': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds_summary", line 30, in parse_aws_rds_summary
    return {instance['DBName']: instance for instance in parse_aws(info)}
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds_summary", line 30, in <dictcomp>
    return {instance['DBName']: instance for instance in parse_aws(info)}


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds_summary': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds_summary", line 30, in parse_aws_rds_summary
    return {instance['DBName']: instance for instance in parse_aws(info)}
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds_summary", line 30, in <dictcomp>
    return {instance['DBName']: instance for instance in parse_aws(info)}


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)


WARNING: Exception while parsing agent section 'aws_rds': KeyError('DBName',)
  File "/omd/sites/mysite/lib/python/cmk_base/data_sources/host_sections.py", line 260, in _update_with_parse_function
    return parse_function(section_content)
  File "/omd/sites/mysite/share/check_mk/checks/aws_rds", line 72, in parse_aws_rds
    parsed.setdefault(metrics['DBName'], metrics)
b4d
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  • You may use the "--debug" option for more info. But have you looked for the "DBName" key that the error log pointing to? Do you have a host named "DBName"? It seems to me more like a configuration error somewhere. You haven't posted your config, so its difficult to tell. – Diamond Apr 04 '19 at 08:00
  • Developers have contacted me, they debugged the problem with Werk #7362 that will be out today. – b4d Apr 04 '19 at 09:39
  • The developers have contacted you from the Serverfault post? Just curious. – Diamond Apr 04 '19 at 10:18
  • @Diamant I have posted to their public mailing list, so I believe that is the point of the origin. In any way, great support from the team. – b4d Apr 05 '19 at 11:03
  • Ok. May be you can post it as an answer with a link to the bug fix page. This will help others visiting serverfault with similar problem. – Diamond Apr 05 '19 at 11:22

1 Answers1

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The problem was a bug, where 'DBName' was used to identify the database, but that value was not always set. Now it uses 'DBInstanceIdentifier'.

Fixed in versions 1.5.0p14 and 1.6.0i1.

Werk #7362

If you want to implement the fix, you can find the commit diff here on the official Check_MK git repository.

b4d
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