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Remove excessive istio attributes to avoid hitting the dimensions limit #765

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merged 3 commits into from
May 3, 2023
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Remove excessive istio attributes to avoid hitting the dimensions limit #765

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d609378
Remove excessive istio attributes to avoid hitting the dimensions limit
dmitryax May 2, 2023
b751ff3
Merge branch 'main' into drop-excessive-istio-attributes
dmitryax May 3, 2023
3728c1d
Update helm-charts/splunk-otel-collector/templates/config/_otel-agent…
dmitryax May 3, 2023
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
skipped when we use both `multilineConfig` AND `extraOperators` in values.yaml
- Enable retry mechanism in filelog receiver to avoid dropping logs on backpressure from the downstream
pipeline components [#764](https://github.com/signalfx/splunk-otel-collector-chart/pull/764)
- Drop excessive istio attributes to avoid running into the dimensions limit when scraping istio metrics is enabled [765](https://github.com/signalfx/splunk-otel-collector-chart/pull/765)

## [0.75.0] - 2023-04-17

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27 changes: 27 additions & 0 deletions helm-charts/splunk-otel-collector/templates/config/_otel-agent.tpl
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Expand Up @@ -586,6 +586,30 @@ processors:
new_name: container.memory.usage
{{- end }}

{{- if or .Values.autodetect.prometheus .Values.autodetect.istio }}
# This processor is used to remove excessive istio attributes to avoid running into the dimensions limit.
# This configuration assumes single cluster istio deployment. If you run istio in multi-cluster scenarios,
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# you may need to adjust this configuration.
attributes/istio:
include:
match_type: regexp
metric_names:
- istio_.*
actions:
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- action: delete
key: source_cluster
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would it make sense to add a new value and generate each action so it's more flexible as additional attributes are (un)wanted?

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@dmitryax dmitryax May 2, 2023 •
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Do you mean having another option in values.yaml for that?

I don't think we should add more configuration options to the already bloated values.yaml for this niche use case.

Overriding the set of attributes is already possible, just a bit more verbose, like:

agent:
  config:
    processors:
      attributes/istio:
        actions:
          - action: delete
            key: another_istio_attribute
          ...

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Also, the current interface to enable istio metrics is pretty unflexible.

autodetect:
  istio: true

We can probably rethink it to be able to add this list of attributes. Maybe as a follow-up effort. Let me know if you have any ideas

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Yeah, it would be great if we made this a bit more flexible. Maybe something like this?

autodetect:
  istio:
    enabled: true
    # Explain why we remove these default set of attributes
    excludeAttributes:
    - attr1
    - attr2

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The problem is the transition from bool value to the map in a backward-compatible way. We can try something out but I would rather do it as a follow-up effort not blocking the release

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Filed this #769

- action: delete
key: destination_cluster
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- action: delete
key: source_canonical_service
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- action: delete
key: destination_canonical_service
- action: delete
key: source_canonical_revision
- action: delete
key: destination_canonical_revision
{{- end }}

# By default only SAPM exporter enabled. It will be pointed to collector deployment if enabled,
# Otherwise it's pointed directly to signalfx backend based on the values provided in signalfx setting.
# These values should not be specified manually and will be set in the templates.
Expand Down Expand Up @@ -774,6 +798,9 @@ service:
processors:
- memory_limiter
- batch
{{- if or .Values.autodetect.prometheus .Values.autodetect.istio }}
- attributes/istio
{{- end }}
- resourcedetection
- resource
{{- if (and .Values.splunkPlatform.metricsEnabled .Values.environment) }}
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