feat: ALB metrics publishing to CloudWatch and Datadog#166
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April 9, 2026 09:10
Publish ALB rule count and target group count as custom metrics after each deployment to enable continuous monitoring and alerting on ALB quota usage. - Add publish_alb_metrics script supporting CloudWatch and Datadog - Integrate as post-deploy step in initial, switch_traffic, and finalize workflows - Add ALB_METRICS_PUBLISH_ENABLED and ALB_METRICS_PUBLISH_TARGET config - Add .claude/settings.local.json to .gitignore
- CloudWatch: nullplatform/ApplicationELB (mirrors AWS/ApplicationELB) - Datadog: nullplatform.applicationelb.* (mirrors aws.applicationelb.*)
Metrics publishing now only depends on ALB_METRICS_PUBLISH_ENABLED
Move publish_alb_metrics step right after verify_networking_reconciliation so metrics reflect sooner instead of waiting for pods to be ready.
Single line on success, single line on error, silent when disabled.
- Add scope-testing submodule - Add 17 unit tests covering CloudWatch, Datadog, error handling, skip logic, and rule counting across multiple listeners
Keep both ALB capacity validation from beta and metrics publishing.
fedemaleh
reviewed
Apr 10, 2026
fedemaleh
reviewed
Apr 10, 2026
fedemaleh
reviewed
Apr 10, 2026
added 3 commits
April 10, 2026 10:22
Support reading ALB_METRICS_PUBLISH_ENABLED and ALB_METRICS_PUBLISH_TARGET from scope-configurations provider, env vars, or defaults.
fedemaleh
approved these changes
Apr 10, 2026
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Summary
publish_alb_metricsscript that publishes ALB rule count and target group count as custom metrics to CloudWatch (nullplatform/ApplicationELB) or Datadog (nullplatform.applicationelb.*)ALB_METRICS_PUBLISH_ENABLEDandALB_METRICS_PUBLISH_TARGETconfigurationMotivation
AWS ALBs have hard limits (100 rules, 100 target groups per ALB) that are not tracked natively by CloudWatch or Datadog. This enables continuous monitoring and alerting before limits are hit.
Configuration
Test plan
bats k8s/deployment/tests/scripts/publish_alb_metrics.bats)nullplatform/ApplicationELBnamespace in kwik-e-mart account