opentelemetry-specificatio
terraform-aws-jaeger
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| opentelemetry-specificatio | terraform-aws-jaeger | |
|---|---|---|
| 7 | 1 | |
| - | 8 | |
| - | - | |
| - | 10.0 | |
| - | about 2 years ago | |
| HCL | ||
| - | MIT License |
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opentelemetry-specificatio
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Migrating to OpenTelemetry
Sure, happy to provide more specifics!
Our main issue was the lack of a synchronous gauge. The officially supported asynchronous API of registering a callback function to report a gauge metric is very different from how we were doing things before, and would have required lots of refactoring of our code. Instead, we wrote a wrapper that exposes a synchronous-like API: https://gist.github.com/yolken-airplane/027867b753840f7d15d6....
It seems like this is a common feature request across many of the SDKs, and it's in the process of being fixed in some of them (https://github.com/open-telemetry/opentelemetry-specificatio...)? I'm not sure what the plans are for the golang SDK specifically.
Another, more minor issue, is the lack of support for "constant" attributes that are applied to all metrics. We use these to identify the app, among other use cases, so we added wrappers around the various "Add", "Record", "Observe", etc. calls that automatically add these. (It's totally possible that this is supported and I missed it, in which case please let me know!).
Overall, the SDK was generally well-written and well-documented, we just needed some extra work to make the interfaces more similar to the ones were were using before.
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OpenTelemetry in 2023
Two problems with OpenTelemetry:
1. It doesn't know what the hell it is. Is it a semantic standard? Is a protocol? It is a facade? What layer of abstraction does it provide? Answer: All of the above! All the things! All the layers!
2. No one from OpenTelemetry has actually tried instrumenting a library. And if they have, they haven't the first suggestion on how instrumenters should actually use metrics, traces, and logs. Do you write to all three? To one? I asked this question two years ago, not a single response. [1]
[1] https://github.com/open-telemetry/opentelemetry-specificatio...
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Go standard library: structured, leveled logging
That's why you have otel logging: https://github.com/open-telemetry/opentelemetry-specificatio...
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Monarch: Google’s Planet-Scale In-Memory Time Series Database
There are a large amount of subtle tradeoffs around the bucketing scheme (log, vs. log-linear, base) and memory layout (sparse, dense, chunked) the amount of configurability in the histogram space (circllhist, DDSketch, HDRHistogram, ...). A good overview is this discussion here:
https://github.com/open-telemetry/opentelemetry-specificatio...
As for the circllhist: There are no knobs to turn. It uses base 10 and two decimal digits of precision. In the last 8 years I have not seen a single use-case in the operational domain where this was not appropriate.
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OpenTelemetry
A good place to look at is the milestones on GitHub: https://github.com/open-telemetry/opentelemetry-specificatio...
Logging is still experimental in the spec. Metrics API is feature freeze and the protocol is stable, so it's more on language SDKs to stabilize their implementations. This is a focus for several of them right now.
terraform-aws-jaeger
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OpenTelemetry in 2023
It's really not that intense. I basically set up my last co's telemetry infrastructure all by myself, using terraform, otel-python, jaeger, and AWS elasticsearch.
This TF project does most of the heavy lift. https://github.com/telia-oss/terraform-aws-jaeger
What are some alternatives?
skywalking - APM, Application Performance Monitoring System
docs - Prometheus documentation: content and static site generator
SLF4J - Simple Logging Facade for Java
proposal-async-context - Async Context for JavaScript
opentelemetry-specification - Specifications for OpenTelemetry
b3-propagation - Repository that describes and sometimes implements B3 propagation
semantic-conventions - Defines standards for generating consistent, accessible telemetry across a variety of domains
opentelemetry-lambda - Create your own Lambda Layer in each OTel language using this starter code. Add the Lambda Layer to your Lamdba Function to get tracing with OpenTelemetry.
zipkin-api - Zipkin's language independent model and HTTP Api Definitions
oteps - OpenTelemetry Enhancement Proposals
jvm-serializers - Benchmark comparing serialization libraries on the JVM
aws-otel-lambda - AWS Distro for OpenTelemetry - AWS Lambda