Have reasonable defaults for the geoipprocessor's context and attribute parameters

[bencehornak]

Component(s)

processor/geoip

Is your feature request related to a problem? Please describe.

As it came out from this discussion the current defaults for the attributes parameter of the geoipprocessor are not meaningful, because context is set to resource and attributes is set to [source.address, client.address], although these attributes are used to describe spans (i.e. records) and never resources.

Describe the solution you'd like

I would change the defaults the following way:

• context would default to record, because to me it feels like the primary use case (I think it is seldom that somebody has so many resources that they want to geo code their own IPs, instead of their clients' IPs)
• and/or attributes would have a default value based on the context:
  • if context is record, then [source.address, client.address]
  • else if context is resource, then [host.ip]

Note: these are breaking changes for users, who are relying on default values of these two fields (however, since the default values are not reasonable as discussed above, I don't think that anybody has ever relied on them).

Describe alternatives you've considered

No response

Additional context

The PR #37008 has implemented the attributes property in a way that its default value is not dependent on the context property.

[github-actions]

Pinging code owners:

• processor/geoip: @andrzej-stencel @michalpristas @rogercoll

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[crobert-1]

Removing needs triage as this issue was requested to be opened by a code owner. There will still need to be discussion to decide correct default values.