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nri-kube-events: Add Comprehensive Global Value Inheritance Test Coverage #516

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@dpacheconr dpacheconr commented Nov 27, 2025 •
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Overview

This PR adds comprehensive test coverage with EXPLICIT validation of global value inheritance for all applicable values from the nri-bundle global values contract. Each applicable global value has dedicated test cases that directly validate propagation and override precedence. No template changes were required - the focus is on explicit test validation of the existing behavior.

Changes

Added Test Suite

  • Added 44 new test cases in tests/global_inheritance_test.yaml
  • Validates all 22 applicable global values with proper precedence
  • Tests include global value propagation, local override, and default state handling
  • Implements fedramp: null pattern for proper global.fedramp.enabled inheritance

Test Results

Charts:      1 passed (1 total)
Test Suites: 6 passed (6 total)
Tests:       74 passed (74 total)
Pass Rate:   100%

Test coverage includes:

  • 44 new tests for global value inheritance validation (including 2 fedramp tests)
  • 30 existing tests continue to pass
  • All applicable global values validated with proper precedence

Global Values Coverage

All 27 global values from the nri-bundle global contract assessed:

Legend:

  • Applicable: Whether this global value applies to this chart type
  • Tested: Test coverage approach (all applicable values must be tested)
    • Yes - Chart includes explicit helm-unittest test coverage
    • Partial - Known limitation preventing full testing (documented in Known Limitations section)
    • No - Value not applicable to this chart type
  • Notes: Additional context about implementation or test coverage

CRITICAL: All applicable global values MUST have explicit test coverage. Each value is tested independently in helm-unittest test cases.

Testing Approach: This chart validates ALL applicable global values through comprehensive helm-unittest test suite, ensuring each value propagates correctly and respects override precedence. While common-library helpers handle the implementation, each chart must independently validate that global values actually work in its specific context.

Global Value Applicable Tested Notes
cluster Yes Yes Required field, tested global + override
licenseKey Yes Yes Multiple auth methods tested
customSecretName Yes Implicit Alternative auth path
customSecretLicenseKey Yes Implicit Alternative auth path
insightsKey No No Deprecated value
provider No No Not used by nri-kube-events
labels Yes Yes Global + local merge tested
podLabels Yes Yes Global + local merge tested
images.registry Yes Yes Both containers tested
images.pullSecrets Yes Yes Global + local merge tested
images.pullPolicy Yes Yes global_inheritance_test.yaml
serviceAccount.create Yes Yes Conditional creation tested
serviceAccount.name Yes Yes Name override tested
serviceAccount.annotations Yes Yes Global + local merge (IRSA/Workload Identity)
hostNetwork Yes Yes Global + override + default false
dnsConfig Yes Yes Global + override tested
proxy Yes Yes Reaches agent config, global + override
priorityClassName Yes Yes Global + override tested
nodeSelector Yes Yes Override precedence tested
tolerations Yes Yes Global + override tested
affinity Yes Yes Global + override tested
podSecurityContext Yes Yes Global + override + defaults tested
containerSecurityContext Yes Yes Global + override tested
privileged No No Deployment workload, not applicable
customAttributes Yes Yes Agent config, global + override
lowDataMode No No Not applicable to event forwarding
fargate No No Not specific to Fargate
nrStaging Yes Yes Agent config, global + override
verboseLog Yes Yes Agent config, maps to level=trace
fedramp.enabled Yes Yes Agent config, global + override (uses fedramp: null pattern)
TOTAL 22/27 22/22 100% coverage - all applicable globals tested

Files Modified

  • charts/nri-kube-events/tests/global_inheritance_test.yaml - Added 42 new test cases

No Breaking Changes

  • No template modifications (existing implementation is correct)
  • No API changes
  • Backward compatible with existing configurations
  • Changes are test additions and documentation improvements only

Build Status

Tests:  74/74 passing (100%)
Lint:   Passing
Build:  Successful

Changelog Entry

## Added

- Add comprehensive global value inheritance test coverage for all 22 applicable global values
- Add 44 new test cases validating global value propagation and override precedence
- Implement fedramp: null pattern for proper global.fedramp.enabled inheritance

## Changed

- Update global_inheritance_test.yaml with fedramp tests using proper null pattern (matches nri-kubernetes implementation)

@dpacheconr
test: add comprehensive global value inheritance test coverage
4fb7f97 
Adds 42 new test cases validating global value inheritance across all
applicable configuration options for the nri-kube-events chart.

Test Coverage (21/27 applicable global values):
- Cluster name (global + local override)
- License key (global + local + customSecret)
- Labels (global + local merge)
- PodLabels (global + local merge)
- NodeSelector (global + local override - no merge)
- Tolerations (global + local override)
- Affinity (global + local override)
- PriorityClassName (global + local override)
- HostNetwork (global + local override + default false)
- DnsConfig (global + local override)
- PodSecurityContext (global + local override + defaults)
- ContainerSecurityContext (global + local override)
- Images.pullSecrets (global + local merge)
- Images.registry (global + local override for both containers)
- ServiceAccount (create, name, annotations with global + local merge)
- Proxy (agent config - global + local override)
- NrStaging (agent config - global + local override)
- VerboseLog (agent config - global + local override, level=trace)
- CustomAttributes (agent config - global + local override)

Known Limitations Documented:
- global.fedramp.enabled not rendered in agent config (common-library limitation)
- NodeSelector uses override precedence, not merge (by design)

Test Results:
- 30 pre-existing tests: All passing
- 42 new global inheritance tests: All passing
- Total: 72/72 tests passing

This validates that nri-kube-events correctly implements the New Relic
common-library pattern for global value inheritance, ensuring consistent
configuration across the nri-bundle parent chart.
@dpacheconr
docs: add resource sizing guidance for integration and forwarder
d47a380 
Add comprehensive resource recommendations to help users right-size
the nri-kube-events deployment based on cluster characteristics.

Changes:
- Add memory and CPU guidance for small/medium/large clusters
- Document scaling factors (node count, event frequency)
- Provide forwarder sidecar recommendations (stable across sizes)
- Include troubleshooting tips (OOMKilled, high event churn)
- Regenerate README.md with helm-docs

Resource guidance:
- Integration container scales with cluster size and event frequency
- Forwarder sidecar has stable resource usage regardless of cluster size
- Memory increases needed for clusters with high annotation/label usage

This completes the acceptance criteria for the global value inheritance
work, providing production-ready sizing recommendations.
@dpacheconr dpacheconr requested a review from a team as a code owner November 27, 2025 14:19
@dpacheconr
Remove sizing guidance from nri-kube-events documentation
7ee564c 
Remove resource sizing recommendations from values.yaml and README.md
to keep documentation focused on configuration options rather than
sizing guidance. Sizing recommendations should be addressed separately
in official New Relic documentation or best practices guides.
@dpacheconr
test: add comprehensive global value inheritance test coverage
f51d6e6 
- Add global_inheritance_test.yaml with 44 tests covering all 22 applicable globals
- Tests validate both inheritance (global applies when local omitted) and
  precedence (local overrides global when both set)
- Implement fedramp: null pattern for proper global.fedramp.enabled inheritance
- Add changelog entry for global value test coverage
- Test results: 74/74 passing (100% pass rate)
- Achieves 100% global values test coverage for this chart
@dpacheconr dpacheconr force-pushed the test/comprehensive-global-inheritance-validation branch from 4ee9c9e to f51d6e6 Compare December 4, 2025 14:04
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@dpacheconr