Improve connection state logging for Jaeger exporter #2239

jpkrohling · 2020-12-02T10:24:23Z

Description:
Adds a connection state reporter to the Jaeger exporter sending state changes to the log and as a metric.

Link to tracking Issue: Closes #1861, as it's the best we can do at this exporter level. On a more general level, the collector could provide more verbose info about the underlying gRPC connections. See #2237 for more information.

Testing: unit and manual tests.

Documentation: None.

Here are the complete logs for an OpenTelemetry Collector that got started without a Jaeger backend available. Note that the config.yaml contains two exporters, one (jaeger) with the insecure: true option, and a second one (jaeger/2) without this option. A Jaeger all-in-one is then started, without TLS support. This ends with the first exporter eventually transitioning to "READY", but the second won't.

2020-12-02T11:17:26.116+0100	INFO	service/service.go:409	Starting OpenTelemetry Collector...	{"Version": "latest", "GitHash": "<NOT PROPERLY GENERATED>", "NumCPU": 12}
2020-12-02T11:17:26.116+0100	INFO	service/service.go:253	Setting up own telemetry...
2020-12-02T11:17:26.130+0100	INFO	service/telemetry.go:101	Serving Prometheus metrics	{"address": "localhost:8888", "level": 0, "service.instance.id": "b4f3bc7c-2593-48e5-9ef9-8b585bbcf4fc"}
2020-12-02T11:17:26.131+0100	INFO	service/service.go:290	Loading configuration...
2020-12-02T11:17:26.131+0100	INFO	service/service.go:301	Applying configuration...
2020-12-02T11:17:26.131+0100	INFO	service/service.go:322	Starting extensions...
2020-12-02T11:17:26.132+0100	INFO	builder/exporters_builder.go:306	Exporter is enabled.	{"component_kind": "exporter", "exporter": "jaeger"}
2020-12-02T11:17:26.132+0100	INFO	builder/exporters_builder.go:306	Exporter is enabled.	{"component_kind": "exporter", "exporter": "jaeger/2"}
2020-12-02T11:17:26.132+0100	INFO	service/service.go:337	Starting exporters...
2020-12-02T11:17:26.132+0100	INFO	builder/exporters_builder.go:92	Exporter is starting...	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger"}
2020-12-02T11:17:26.132+0100	INFO	jaegerexporter/exporter.go:183	State of the connection with the Jaeger Collector backend	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger", "state": "CONNECTING"}
2020-12-02T11:17:26.132+0100	INFO	builder/exporters_builder.go:97	Exporter started.	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger"}
2020-12-02T11:17:26.132+0100	INFO	builder/exporters_builder.go:92	Exporter is starting...	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger/2"}
2020-12-02T11:17:26.132+0100	INFO	jaegerexporter/exporter.go:183	State of the connection with the Jaeger Collector backend	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger/2", "state": "CONNECTING"}
2020-12-02T11:17:26.132+0100	INFO	builder/exporters_builder.go:97	Exporter started.	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger/2"}
2020-12-02T11:17:26.132+0100	INFO	builder/pipelines_builder.go:207	Pipeline is enabled.	{"pipeline_name": "traces", "pipeline_datatype": "traces"}
2020-12-02T11:17:26.132+0100	INFO	service/service.go:350	Starting processors...
2020-12-02T11:17:26.132+0100	INFO	builder/pipelines_builder.go:51	Pipeline is starting...	{"pipeline_name": "traces", "pipeline_datatype": "traces"}
2020-12-02T11:17:26.132+0100	INFO	builder/pipelines_builder.go:61	Pipeline is started.	{"pipeline_name": "traces", "pipeline_datatype": "traces"}
2020-12-02T11:17:26.132+0100	INFO	builder/receivers_builder.go:235	Receiver is enabled.	{"component_kind": "receiver", "component_type": "otlp", "component_name": "otlp", "datatype": "traces"}
2020-12-02T11:17:26.132+0100	INFO	service/service.go:362	Starting receivers...
2020-12-02T11:17:26.132+0100	INFO	builder/receivers_builder.go:70	Receiver is starting...	{"component_kind": "receiver", "component_type": "otlp", "component_name": "otlp"}
2020-12-02T11:17:26.132+0100	INFO	otlpreceiver/otlp.go:93	Starting GRPC server on endpoint 0.0.0.0:4317	{"component_kind": "receiver", "component_type": "otlp", "component_name": "otlp"}
2020-12-02T11:17:26.132+0100	INFO	otlpreceiver/otlp.go:130	Setting up a second GRPC listener on legacy endpoint 0.0.0.0:55680	{"component_kind": "receiver", "component_type": "otlp", "component_name": "otlp"}
2020-12-02T11:17:26.132+0100	INFO	otlpreceiver/otlp.go:93	Starting GRPC server on endpoint 0.0.0.0:55680	{"component_kind": "receiver", "component_type": "otlp", "component_name": "otlp"}
2020-12-02T11:17:26.132+0100	INFO	builder/receivers_builder.go:75	Receiver started.	{"component_kind": "receiver", "component_type": "otlp", "component_name": "otlp"}
2020-12-02T11:17:26.132+0100	INFO	service/service.go:265	Everything is ready. Begin running and processing data.
2020-12-02T11:17:27.132+0100	INFO	jaegerexporter/exporter.go:183	State of the connection with the Jaeger Collector backend	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger/2", "state": "TRANSIENT_FAILURE"}
2020-12-02T11:17:28.132+0100	INFO	jaegerexporter/exporter.go:183	State of the connection with the Jaeger Collector backend	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger", "state": "TRANSIENT_FAILURE"}
2020-12-02T11:17:43.132+0100	INFO	jaegerexporter/exporter.go:183	State of the connection with the Jaeger Collector backend	{"component_kind": "exporter", "component_type": "jaeger", "component_name": "jaeger", "state": "READY"}

And here are the metrics for the final state:

# HELP otelcol_jaegerexporter_conn_state Last connection state: 0 = Idle, 1 = Connecting, 2 = Ready, 3 = TransientFailure, 4 = Shutdown
# TYPE otelcol_jaegerexporter_conn_state gauge
otelcol_jaegerexporter_conn_state{exporter_name="jaeger",service_instance_id="341f6179-0c34-4ad1-b2e5-19b2bed4c9d1"} 2
otelcol_jaegerexporter_conn_state{exporter_name="jaeger/2",service_instance_id="341f6179-0c34-4ad1-b2e5-19b2bed4c9d1"} 3

Signed-off-by: Juraci Paixão Kröhling [email protected]

codecov · 2020-12-02T10:32:58Z

Codecov Report

Merging #2239 (1632b15) into master (96b226a) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2239      +/-   ##
==========================================
+ Coverage   91.90%   91.92%   +0.02%     
==========================================
  Files         269      270       +1     
  Lines       15239    15295      +56     
==========================================
+ Hits        14005    14060      +55     
- Misses        855      856       +1     
  Partials      379      379

Impacted Files	Coverage Δ
exporter/jaegerexporter/exporter.go	`94.80% <100.00%> (+6.56%)`	⬆️
exporter/jaegerexporter/metrics.go	`100.00% <100.00%> (ø)`
service/telemetry.go	`85.71% <100.00%> (+0.25%)`	⬆️
internal/processor/filterlog/filterlog.go	`89.47% <0.00%> (+1.97%)`	⬆️

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exporter/jaegerexporter/exporter.go

jpkrohling · 2020-12-03T08:56:10Z

@bogdandrutu would you please review it again?

tigrannajaryan · 2020-12-03T17:38:59Z

It would be great to make this work for all gRPC exporters. Not necessarily in this PR, but in the future.

jpkrohling · 2020-12-03T21:05:24Z

Sure, let's get this one merged and see the feedback from users. I'll then refactor the main logic from this PR into a generic facility, to be used by gRPC-based exporters.

jpkrohling · 2020-12-07T11:10:10Z

ping @bogdandrutu

jpkrohling · 2020-12-08T10:14:26Z

ping @bogdandrutu

jpkrohling · 2020-12-11T10:47:33Z

@bogdandrutu @tigrannajaryan ping?

tigrannajaryan · 2020-12-15T18:56:49Z

exporter/jaegerexporter/exporter.go

 	}
+	s.AddStateChangeCallback(s.onStateChange)


Is there ever more than one callback needed? Also, perhaps initialize it in the above struct initialization. It is not clear why this gets a special treatment while other fields are initialized directly.

Is there ever more than one callback needed?

No, perhaps in tests only. In any case, I think it's a good general pattern to allow multiple callbacks to exist. I'm happy to make it a simple property if you prefer.

It is not clear why this gets a special treatment while other fields are initialized directly.

It's because it needs to refer the instance s.

exporter/jaegerexporter/exporter.go

jpkrohling · 2020-12-16T09:38:24Z

I won't be able to work on the review comments until I'm back from the holiday break (Jan 10).

github-actions · 2020-12-24T03:40:07Z

This PR was marked stale due to lack of activity. It will be closed in 7 days.

github-actions · 2021-01-05T03:46:36Z

This PR was marked stale due to lack of activity. It will be closed in 7 days.

github-actions · 2021-01-14T04:06:17Z

This PR was marked stale due to lack of activity. It will be closed in 7 days.

jpkrohling · 2021-01-14T15:46:44Z

PR updated. There's only one pending decision, about the callbacks.

jpkrohling · 2021-01-20T15:40:37Z

@tigrannajaryan do you know what's wrong with the CI? Can you start it again?

Signed-off-by: Juraci Paixão Kröhling <[email protected]>

jpkrohling · 2021-01-21T13:34:13Z

CI is failing with an unrelated issue:

FAIL	github.com/open-telemetry/opentelemetry-collector-contrib/processor/spanmetricsprocessor [setup failed]
config_test.go:31:2: module go.opentelemetry.io/collector@latest found (v0.18.0, replaced by /__w/opentelemetry-collector/opentelemetry-collector), but does not contain package go.opentelemetry.io/collector/processor/queuedprocessor

jpkrohling · 2021-01-22T12:21:00Z

ping @bogdandrutu , @tigrannajaryan

Bumps [lycheeverse/lychee-action](https://github.com/lycheeverse/lychee-action) from 1.5.1 to 1.5.2. - [Release notes](https://github.com/lycheeverse/lychee-action/releases) - [Commits](lycheeverse/lychee-action@v1.5.1...v1.5.2) --- updated-dependencies: - dependency-name: lycheeverse/lychee-action dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <[email protected]> Signed-off-by: dependabot[bot] <[email protected]> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

jpkrohling requested a review from a team December 2, 2020 10:24

jpkrohling force-pushed the jpkrohling/1861-improve-connection-state-logging-for-jaeger-exporter branch from de4901c to e4d2278 Compare December 2, 2020 10:50

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jpkrohling force-pushed the jpkrohling/1861-improve-connection-state-logging-for-jaeger-exporter branch 5 times, most recently from e9a0d08 to f33f064 Compare December 3, 2020 08:07

jpkrohling requested a review from bogdandrutu December 3, 2020 08:56

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jpkrohling force-pushed the jpkrohling/1861-improve-connection-state-logging-for-jaeger-exporter branch 2 times, most recently from 745f47c to a12ca44 Compare January 21, 2021 12:06

Improve connection state logging for Jaeger exporter

1632b15

Signed-off-by: Juraci Paixão Kröhling <[email protected]>

jpkrohling force-pushed the jpkrohling/1861-improve-connection-state-logging-for-jaeger-exporter branch from a12ca44 to 1632b15 Compare January 21, 2021 12:32

tigrannajaryan approved these changes Jan 22, 2021

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tigrannajaryan merged commit bfca1eb into open-telemetry:master Jan 22, 2021

MovieStoreGuy pushed a commit to atlassian-forks/opentelemetry-collector that referenced this pull request Nov 11, 2021

Fix RC tags in docs (open-telemetry#2239)

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Improve connection state logging for Jaeger exporter #2239

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