Global attributes + field mapping

[ewrogers]

We have a single Axiom dataset for our application, and typically use the environment field to separate dev, stage, and prod.

There are two problems I am facing currently:

1. Global attributes, I want to essentially have environment in every event logged throughout the application. I am just reading this from ENVIRONMENT env var. Since my entire application is very async via tokio, including tokio::spawn for child tasks... it's difficult to get this to "stick". I had thought about a custom layer but it seems events are immutable?

2. Mapping of fields, which seems to always be attributes.custom.[field]. In the case of environment, I want it to be top-level and not nested within custom attributes. How can I get it to be like this?

I have tried many things but nothing seems to work, and it's a bit confusing considering I am able to get it to work fairly easily with other axiomhq libs (like pino in JS).

Addendum

Turns out, #13 would solve the global attribute issue via with_tags(). The mapping of fields is due to Axiom's backend gRPC layer automatically nesting "non-blessed" attributes into attributes.custom, which is a bit annoying.

I spun up a simple HTTP proxy to compare why this works fine in JS land with pino. Turns out the JS library sends raw events as application/json to /datasets/:name/ingest which handles these differently than the /api/v1/traces gRPC one.

[darach]

Hey @ewrogers Erik,

We have merged #13 so give it a whirl and let us know if it works for your use case.

We're also looking at #12 with an eye to enhancing that as well.

Cheers,

Darach.

[ewrogers]

Thanks, I appreciate it! Will definitely be taking a look at this soon.