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Merged
DomGarguilo merged 7 commits into from
Apr 23, 2025
Merged

Update tracing blog post #453

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7a07134
Update tracing blog post
DomGarguilo Apr 4, 2025
4b88f58
Add note to old steps about new section. Add section links
DomGarguilo Apr 8, 2025
e4ec9cd
Address feedback
DomGarguilo Apr 21, 2025
41f90f9
Merge remote-tracking branch 'upstream/main' into tracingBlogPostUpdate
DomGarguilo Apr 21, 2025
5be20d6
Update hyperlink to section
DomGarguilo Apr 21, 2025
cefa67e
Use image styling on existing screenshots
DomGarguilo Apr 21, 2025
71b7506
Add note earlier about updated config steps
DomGarguilo Apr 23, 2025
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34 changes: 32 additions & 2 deletions _posts/blog/2022-06-22-2.1.0-metrics-and-tracing.md
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Expand Up @@ -85,7 +85,9 @@ general.micrometer.factory=org.apache.accumulo.test.metrics.TestStatsDRegistryFa

10. Log into Grafana (http://localhost:3003/) using the default credentials (root/root). Click the `Home` icon at the top, then click the `Accumulo Micrometer Test Dashboard`. If everything is working correctly, then you should see something like the image below.

![Grafana Screenshot](/images/blog/202206_metrics_and_tracing/Grafana_Screenshot.png)
<a class="p-3 border rounded d-block" href="{{ site.baseurl }}/images/blog/202206_metrics_and_tracing/Grafana_Screenshot.png">
<img src="{{ site.baseurl }}/images/blog/202206_metrics_and_tracing/Grafana_Screenshot.png" class="img-fluid rounded" alt="Grafana Screenshot"/>
</a>
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@DomGarguilo DomGarguilo Apr 21, 2025

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While I was making changes to this file I decided to add the styling we use in other pages for these screenshots. This helps the images remain in line with the other content.

For example:
image

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@ctubbsii ctubbsii Apr 22, 2025

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It doesn't matter, really, but I think there's probably a way to specify the class on the image or at least on the section (div or p) containing the image, in the markdown form, that might be easier to read or maintain. Markdown, in general, is easier to work with than the raw HTML, but like I said, this doesn't really matter. The raw HTML is fine.


# Tracing

Expand Down Expand Up @@ -118,6 +120,8 @@ general.opentelemetry.enabled=true
general.opentelemetry.enabled=true
```

**Note:** These instructions are for configuring OpenTelemetry and Jaeger with Accumulo 2.1.0. As of Accumulo 2.1.4, the version of OpenTelemetry has been updated and the instructions have changed. See the [Updated Configuration with Newer Versions of OpenTelemetry](#updated-configuration-with-newer-versions-of-opentelemetry) section at the end of this post for current configuration information.

5. Configure the OpenTelemetry JavaAgent in accumulo-env.sh by uncommenting the following and updating the path to the java agent jar:
```
## Optionally setup OpenTelemetry SDK AutoConfigure
Expand Down Expand Up @@ -148,4 +152,30 @@ docker run -d --rm --name jaeger \

8. View traces in Jaeger UI at http://localhost:16686. You can select the service name on the left panel and click `Find Traces` to view the trace information. If everything is working correctly, then you should see something like the image below.

![Jaeger Screenshot](/images/blog/202206_metrics_and_tracing/Jaeger_Screenshot.png)
<a class="p-3 border rounded d-block" href="{{ site.baseurl }}/images/blog/202206_metrics_and_tracing/Jaeger_Screenshot.png">
<img src="{{ site.baseurl }}/images/blog/202206_metrics_and_tracing/Jaeger_Screenshot.png" class="img-fluid rounded" alt="Jaeger Screenshot"/>
</a>

## Updated Configuration with Newer Versions of OpenTelemetry

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@dlmarion dlmarion Apr 8, 2025

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The blog post was for the 2.1.0 release. It looks like the addition here updates / replaces items 5 and 6 above. I'm thinking that we should put a note in items 5 and 6 that says something like:

This contains instructions for configuring OpenTelemetry and Jaeger with Accumulo 2.1.0. As of Accumulo 2.1.4 the version of OpenTelemetry has been updated and the instructions have changed. See below for more information.

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@DomGarguilo DomGarguilo Apr 8, 2025

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Good idea. Added in 4b88f58.

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@DomGarguilo DomGarguilo Apr 8, 2025

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Screenshot from 2025-04-08 14-52-32
Screenshot from 2025-04-08 14-52-18

The original tracing example above was written for Accumulo 2.1.0 which uses OpenTelemetry 1.19.0. Accumulo 2.1.4 has been updated to use OpenTelemetry 1.48.0, which requires different configuration. When working with Accumulo 2.1.4 or any deployment using OpenTelemetry 1.48.0 or newer, use OTLP (OpenTelemetry Protocol) instead of the direct Jaeger exporter.

Follow steps 1-4 from the [Tracing Example](#tracing-example) section, then use these updated steps in place of steps 5-6:

1. Configure the OpenTelemetry JavaAgent in accumulo-env.sh with OTLP export:
```bash
JAVA_OPTS=('-Dotel.traces.exporter=otlp' '-Dotel.exporter.otlp.endpoint=http://localhost:4317' '-Dotel.metrics.exporter=none' '-Dotel.logs.exporter=none' "${JAVA_OPTS[@]}")
JAVA_OPTS=('-javaagent:path/to/opentelemetry-javaagent.jar' "${JAVA_OPTS[@]}")
```
2. Start Jaeger with OTLP support:
```bash
docker run --rm --name jaeger \
-p 16686:16686 \
-p 4317:4317 \
-p 4318:4318 \
-p 5778:5778 \
-p 9411:9411 \
jaegertracing/jaeger:2.3.0
```

After completing these updated steps, continue with steps 7-8 from the original instructions to view traces in Jaeger.