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s
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a
Tried the simple flask with a simple standalone docker installation also (as shown here https://dev.to/signoz/monitor-your-python-application-with-full-stack-open-source-apm-tool-signoz-10n8), to no avail (no trace or service shows up in the UI 😞
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❯ OTEL_RESOURCE_ATTRIBUTES=service.name=pythonApp OTEL_EXPORTER_OTLP_ENDPOINT="<http://example.com:4317>" opentelemetry-instrument python3 app.py
s
What's the 
OTEL_EXPORTER_OTLP_ENDPOINT="<http://example.com:4317>"
? Did you meant localhost instead of example.com?
a
No, it is the domain where the endpoint is hosted. I just redacted it before posting here. I also tried it with the public IP address of the VM.
s
Is that address reachable for the app?
a
Yes, TCP ports 4317 and 4318 are open to all IPs.
s
Ok port are open but is the host reachable for the app? Could you try this troubleshooting guide https://signoz.io/docs/install/troubleshooting/?
👀 1
a
The 
troubleshoot
tool seems to have access.
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2022-08-31T17:45:55.293+0530	INFO	workspace/main.go:28	STARTING!
2022-08-31T17:45:55.293+0530	INFO	checkEndpoint/checkEndpoint.go:41	checking reachability of SigNoz endpoint
2022-08-31T17:45:55.405+0530	INFO	workspace/main.go:46	Successfully sent sample data to signoz ...
I noticed that the flask traces are being sent now, though these exceptions also show sometimes -
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❯ OTEL_RESOURCE_ATTRIBUTES=service.name=pythonApp OTEL_EXPORTER_OTLP_ENDPOINT="<http://example.com:4317>" opentelemetry-instrument python3 app.py

127.0.0.1 - - [31/Aug/2022 13:13:02] "POST /action HTTP/1.1" 500 -
127.0.0.1 - - [31/Aug/2022 13:13:04] "GET /completed HTTP/1.1" 200 -
127.0.0.1 - - [31/Aug/2022 13:13:04] "GET /static/assets/style.css HTTP/1.1" 304 -
127.0.0.1 - - [31/Aug/2022 13:13:04] "GET /static/assets/emoji.css HTTP/1.1" 304 -
127.0.0.1 - - [31/Aug/2022 13:13:04] "GET /static/assets/twemoji.min.js HTTP/1.1" 304 -
127.0.0.1 - - [31/Aug/2022 13:13:04] "GET /static/assets/emoji.js HTTP/1.1" 304 -
127.0.0.1 - - [31/Aug/2022 13:13:06] "GET /list HTTP/1.1" 500 -
127.0.0.1 - - [31/Aug/2022 13:13:06] "GET /static/assets/style.css HTTP/1.1" 304 -
127.0.0.1 - - [31/Aug/2022 13:13:06] "GET /static/assets/emoji.css HTTP/1.1" 304 -
127.0.0.1 - - [31/Aug/2022 13:13:06] "GET /static/assets/twemoji.min.js HTTP/1.1" 304 -
127.0.0.1 - - [31/Aug/2022 13:13:06] "GET /static/assets/emoji.js HTTP/1.1" 304 -
Transient error StatusCode.UNAVAILABLE encountered while exporting metrics, retrying in Nones.
Exception while exporting metrics an integer is required (got type NoneType)
Traceback (most recent call last):
  File "/Users/username/Downloads/test_apm/simple_server/lib/python3.9/site-packages/opentelemetry/exporter/otlp/proto/grpc/exporter.py", line 305, in _export
    self._client.Export(
  File "/Users/username/Downloads/test_apm/simple_server/lib/python3.9/site-packages/grpc/_channel.py", line 946, in __call__
    return _end_unary_response_blocking(state, call, False, None)
  File "/Users/username/Downloads/test_apm/simple_server/lib/python3.9/site-packages/grpc/_channel.py", line 849, in _end_unary_response_blocking
    raise _InactiveRpcError(state)
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
        status = StatusCode.UNAVAILABLE
        details = "Connection reset by peer"
        debug_error_string = "{"created":"@1661938573.017058000","description":"Error received from peer ipv4:<ip-address-here>:4317","file":"src/core/lib/surface/call.cc","file_line":967,"grpc_message":"Connection reset by peer","grpc_status":14}"
>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/username/Downloads/test_apm/simple_server/lib/python3.9/site-packages/opentelemetry/sdk/metrics/_internal/export/__init__.py", line 482, in _receive_metrics
    self._exporter.export(metrics_data, timeout_millis=timeout_millis)
  File "/Users/username/Downloads/test_apm/simple_server/lib/python3.9/site-packages/opentelemetry/exporter/otlp/proto/grpc/metric_exporter/__init__.py", line 248, in export
    return self._export(metrics_data)
  File "/Users/username/Downloads/test_apm/simple_server/lib/python3.9/site-packages/opentelemetry/exporter/otlp/proto/grpc/exporter.py", line 345, in _export
    sleep(delay)
TypeError: an integer is required (got type NoneType)
Strangely, it is still not showing the traces for the previous test code I was trying to run 🤔-
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❯ OTEL_RESOURCE_ATTRIBUTES=service.name=TestApm OTEL_EXPORTER_OTLP_ENDPOINT="<http://example.com:4317>" opentelemetry-instrument python3 simple_server.py 7000 127.0.0.1
HTTP Server Running...........
addrecord one: {'var1': ['value1'], 'var2': ['value2']}
127.0.0.1 - - [31/Aug/2022 17:55:47] "POST /api/v1/addrecord/one HTTP/1.1" 200 -
addrecord two: {'var1': ['value1'], 'var2': ['value2'], 'var3': ['value3']}
127.0.0.1 - - [31/Aug/2022 17:55:50] "POST /api/v1/addrecord/two HTTP/1.1" 200 -
127.0.0.1 - - [31/Aug/2022 17:55:54] "GET /api/v1/getrecord/one HTTP/1.1" 200 -
getrecord one: {"var1": ["value1"], "var2": ["value2"]}
s
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python3 simple_server.py 7000 127.0.0.1
What does this do? Does it have some reload mechanism? OTEL It has issues reloader so make sure to disable if that's enabled.
a
s
There is nothing instrumented so no data is sent. What were you expecting? The OTEL auto instrumentation only supports some list of popular frameworks https://github.com/open-telemetry/opentelemetry-python-contrib/tree/main/instrumentation.
a
Ah, got it. I should have looked at that link before. Thanks @Srikanth Chekuri!
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