Hi,
i get every x minutes the critical result "CRIT - [agent] Unsupported protocol version: b'/u'**CRIT** , Got no information from host, execution time 0.8 sec" on the CHECK_MK on my linux hosts. Next check is then ok, so the service is flapping continuously.
i think the encryption is the problem, see attached logfile.
renaming the client-config file /etc/check_mk/encryption.cfg to .bak did not help. I just deleted it -> it seems that this even does not help.
Setup -> Agents -> [Access to Agents] -> Encryption:
Password is set, encryption for Agent and for Realtime is set to: Enable (accept encrypted and unencrypted data)
is this a bug or can i do something to avoid this error?
OMD[]:~$ cmk --debug -vvI ..lan
Discovering services and host labels on: ..lan
..lan:
- FETCHING DATA
Source: SourceType.HOST/FetcherType.TCP
[cpu_tracking] Start [7f068e5ee820]
Connecting via TCP to 192.168.2.53:6556 (5.0s timeout)
[TCPFetcher] Fetch with cache settings: DefaultAgentFileCache(path=PosixPath(’/omd/sites//tmp/check_mk/cache/..lan’), max_age=0, disabled=False, use_outdated=False, simulation=False, Cache enabled: True
Not using cache (Too old. Age is 28 sec, allowed is 0 sec)
[TCPFetcher] Execute data source
Reading data from agent
Output is encrypted
Decrypt encrypted output
Closing TCP connection to 192.168.2.53:6556
[cpu_tracking] Stop [7f068e5ee820 - Snapshot(process=posix.times_result(user=0.010000000000000009, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.8299999982118607))]
Try aquire lock on /omd/sites//var/check_mk/crashes/base/ceb47930-5419-11eb-9aab-4e99259a9cb8/crash.info
Got lock on /omd/sites//var/check_mk/crashes/base/ceb47930-5419-11eb-9aab-4e99259a9cb8/crash.info
Releasing lock on /omd/sites//var/check_mk/crashes/base/ceb47930-5419-11eb-9aab-4e99259a9cb8/crash.info
Released lock on /omd/sites//var/check_mk/crashes/base/ceb47930-5419-11eb-9aab-4e99259a9cb8/crash.info
Traceback (most recent call last):
File “/omd/sites//lib/python3/cmk/fetchers/tcp.py”, line 167, in _real_decrypt
protocol = int(output[:2])
ValueError: invalid literal for int() with base 10: b’/u’
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File “/omd/sites//bin/cmk”, line 85, in
exit_status = modes.call(mode_name, mode_args, opts, args)
File “/omd/sites//lib/python3/cmk/base/modes/init.py”, line 69, in call
return handler(*handler_args)
File “/omd/sites//lib/python3/cmk/base/modes/check_mk.py”, line 1515, in mode_discover
discovery.do_discovery(
File “/omd/sites//lib/python3/cmk/base/discovery.py”, line 367, in do_discovery
fetcher_messages=list(
File “/omd/sites//lib/python3/cmk/base/checkers/_checkers.py”, line 228, in fetch_all
raw_data = source.fetch()
File “/omd/sites//lib/python3/cmk/base/checkers/_abstract.py”, line 164, in fetch
return fetcher.fetch(self.mode)
File “/omd/sites//lib/python3/cmk/fetchers/_base.py”, line 221, in fetch
return result.OK(self._fetch(mode))
File “/omd/sites//lib/python3/cmk/fetchers/_base.py”, line 250, in _fetch
raw_data = self._fetch_from_io(mode)
File “/omd/sites//lib/python3/cmk/fetchers/tcp.py”, line 103, in _fetch_from_io
return self._validate_decrypted_data(self._decrypt(self._raw_data()))
File “/omd/sites//lib/python3/cmk/fetchers/tcp.py”, line 144, in _decrypt
output = self._real_decrypt(output)
File “/omd/sites//lib/python3/cmk/fetchers/tcp.py”, line 169, in _real_decrypt
raise MKFetcherError(“Unsupported protocol version: %r” % output[:2])
cmk.fetchers._base.MKFetcherError: Unsupported protocol version: b’/u’
OMD[]:~$
---- first bytes of the crash-file:
OMD[]:~$ cat /omd/sites//var/check_mk/crashes/base/16e49158-541b-11eb-abfd-4e99259a9cb8/crash.info
{“time”: 1610376088.816097, “os”: “buster”, “version”: “2.0.0b3”, “edition”: “cre”, “core”: “nagios”, “python_version”: “3.8.6 (default, Oct 22 2020, 16:42:50) \n[GCC 10.1.0]”, “python_paths”: ["/opt/omd/versions/2.0.0b3.cre/bin", “/omd/sites//local/lib/python3”, “/omd/sites//lib/python38.zip”, “/omd/sites//lib/python3.8”, “/omd/sites//lib/python3.8/lib-dynload”, “/omd/sites//lib/python3.8/site-packages”, “/omd/sites//lib/python3”], “id”: “16e49158-541b-11eb-abfd-4e99259a9cb8”, “crash_type”: “base”, “exc_type”: “MKFetcherError”, “exc_value”: “Unsupported protocol version: b’/u’”, “exc_traceback”: [["/omd/sites//bin/cmk", 85, “”, “exit_status = modes.call(mode_name, mode_args, opts, args)”], ["/omd/sites//lib/python3/cmk/base/modes/init.py", 69, “call”, “return handler(*handler_args)”], ["/omd/sites//lib/python3/cmk/base/modes/check_mk.py", 1515, “mode_discover”, “discovery.do_discovery(”], ["/omd/sites//lib/python3/cmk/base/discovery.py", 367, “do_discovery”, “fetcher_messages=list(”], ["/omd/sites//lib/python3/cmk/base/checkers/_checkers.py", 228, “fetch_all”, “raw_data = source.fetch()”], ["/omd/sites//lib/python3/cmk/base/checkers/_abstract.py", 164, “fetch”, “return fetcher.fetch(self.mode)”], ["/omd/sites//lib/python3/cmk/fetchers/_base.py", 221, “fetch”, “return result.OK(self._fetch(mode))”], ["/omd/sites//lib/python3/cmk/fetchers/_base.py", 250, “_fetch”, “raw_data = self._fetch_from_io(mode)”], ["/omd/sites//lib/python3/cmk/fetchers/tcp.py", 103, “_fetch_from_io”, “return self._validate_decrypted_data(self._decrypt(self._raw_data()))”], ["/omd/sites//lib/python3/cmk/fetchers/tcp.py", 144, “_decrypt”, “output = self._real_decrypt(output)”], ["/omd/sites//lib/python3/cmk/fetchers/tcp.py", 169, “_real_decrypt”, “raise MKFetcherError(“Unsupported protocol version: %r” % output[:2])”]], “local_vars”: "eyd…