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fix(karpenter): add EBS CSI startup taints - #688

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edersonbrilhante merged 1 commit into
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fix-arc-karpenter-startup-taint
Aug 31, 2026
Merged

fix(karpenter): add EBS CSI startup taints#688
edersonbrilhante merged 1 commit into
mainfrom
fix-arc-karpenter-startup-taint

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@edersonbrilhante

@edersonbrilhante edersonbrilhante commented Aug 31, 2026

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Description

Adds the AWS EBS CSI startup taint to the shared EKS and per-tenant ARC Karpenter NodePools. Karpenter can therefore wait for EBS CSI initialization without provisioning duplicate nodes for the same pending runner workload.

Type of Change

  • Feature
  • Bug Fix
  • Documentation
  • Refactor
  • Other: __________

Testing

  • Pre-commit checks passed, including Terraform/Tofu validation and YAML validation.
  • Both NodePool templates parse as valid YAML.
  • ARC interface contract test passed.
  • EKS source inventory test requires tofu init because the local module cache is stale.
  • ARC behavior test is blocked by the existing Darwin ARM64 Kubernetes provider plugin handshake.

@edersonbrilhante
edersonbrilhante requested a review from a team as a code owner August 31, 2026 19:00
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github-actions Bot commented Aug 31, 2026

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OPA/conftest tenant-isolation gate

Result: passed

Gate Result
conftest verify --policy policy/opa passed

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Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

@github-actions

github-actions Bot commented Aug 31, 2026 •
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Mutation test critical Lambda boundaries

Result: passed

Suite Passed Failed Errors Skipped Total Duration Result
Mutation tests 17 0 0 0 17 1.46s passed

Coverage: 39.67% (1215/3063 lines)

Lowest-covered Lambda files

File Coverage Missed lines

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github-actions Bot commented Aug 31, 2026 •
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Automation gate tests

Result: passed

Suite Passed Failed Errors Skipped Total Duration Result
Automation gate tests 26 0 0 0 26 0.70s passed

Coverage: 84.81% (670/790 lines)

Lowest-covered Lambda files

File Coverage Missed lines

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github-actions Bot commented Aug 31, 2026 •
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Offline IaC contract tests

Result: passed

Suite Passed Failed Errors Skipped Total Duration Result
Offline IaC contracts 128 0 0 0 128 4.46s passed

Coverage: 95.14% (1467/1542 lines)

Lowest-covered Lambda files

File Coverage Missed lines

@edersonbrilhante
edersonbrilhante force-pushed the fix-arc-karpenter-startup-taint branch from c63a0d7 to b0ea72e Compare August 31, 2026 19:04
@edersonbrilhante
edersonbrilhante enabled auto-merge (squash) August 31, 2026 19:05
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OpenTofu module tests (latest-stable)

Result: passed

OpenTofu version: 1.12.6

Metric Count
Passed modules 72
Failed modules 0
Total modules 72
Module Result
modules/helpers/ami_policy passed
modules/helpers/ami_sharing passed
modules/helpers/aws_config_recording passed
modules/helpers/cloud_custodian passed
modules/helpers/cloud_formation passed
modules/helpers/dedicated_mac_hosts passed
modules/helpers/ecr passed
modules/helpers/forge_subscription passed
modules/helpers/microvm passed
modules/helpers/opt_in_regions passed
modules/helpers/service_linked_roles passed
modules/helpers/storage passed
modules/infra/eks passed
modules/integrations/github_webhook_relay_destination passed
modules/integrations/github_webhook_relay_destination_receivers passed
modules/integrations/github_webhook_relay_destination_receivers/webex_webhook_relay passed
modules/integrations/splunk_aws_billing passed
modules/integrations/splunk_cloud_conf_shared passed
modules/integrations/splunk_cloud_data_manager passed
modules/integrations/splunk_cloud_data_manager/data_input passed
modules/integrations/splunk_cloud_data_manager/log_group_reconciler passed
modules/integrations/splunk_cloud_data_manager/sec_meta_ec2_tags passed
modules/integrations/splunk_cloud_data_manager_common passed
modules/integrations/splunk_dependency_monitor passed
modules/integrations/splunk_o11y_aws_integration passed
modules/integrations/splunk_o11y_aws_integration_common passed
modules/integrations/splunk_o11y_conf_shared passed
modules/integrations/splunk_o11y_conf_shared/dashboards/arc_runner_operations passed
modules/integrations/splunk_o11y_conf_shared/dashboards/aws_regional_health passed
modules/integrations/splunk_o11y_conf_shared/dashboards/aws_service_limits passed
modules/integrations/splunk_o11y_conf_shared/dashboards/billing passed
modules/integrations/splunk_o11y_conf_shared/dashboards/dependency_probes passed
modules/integrations/splunk_o11y_conf_shared/dashboards/dynamodb passed
modules/integrations/splunk_o11y_conf_shared/dashboards/ebs passed
modules/integrations/splunk_o11y_conf_shared/dashboards/forge_impact passed
modules/integrations/splunk_o11y_conf_shared/dashboards/k8s_control_plane passed
modules/integrations/splunk_o11y_conf_shared/dashboards/lambda passed
modules/integrations/splunk_o11y_conf_shared/dashboards/lambda_control_plane passed
modules/integrations/splunk_o11y_conf_shared/dashboards/metric_ingest passed
modules/integrations/splunk_o11y_conf_shared/dashboards/opencost passed
modules/integrations/splunk_o11y_conf_shared/dashboards/runner_ec2 passed
modules/integrations/splunk_o11y_conf_shared/dashboards/runner_k8s passed
modules/integrations/splunk_o11y_conf_shared/dashboards/runner_usage passed
modules/integrations/splunk_o11y_conf_shared/dashboards/s3 passed
modules/integrations/splunk_o11y_conf_shared/dashboards/s3_control_plane passed
modules/integrations/splunk_o11y_conf_shared/dashboards/sqs passed
modules/integrations/splunk_o11y_conf_shared/dashboards/sqs_control_plane passed
modules/integrations/splunk_o11y_conf_shared/detectors/aws_regional_health passed
modules/integrations/splunk_o11y_conf_shared/detectors/dependency_probes passed
modules/integrations/splunk_o11y_conf_shared/detectors/ec2_runner_health passed
modules/integrations/splunk_o11y_conf_shared/detectors/k8s passed
modules/integrations/splunk_opencost_eks passed
modules/integrations/splunk_otel_eks passed
modules/integrations/splunk_secrets passed
modules/integrations/splunk_stuck_workflow_job_dispatcher passed
modules/integrations/teleport passed
modules/integrations/teleport/tenant passed
modules/platform/arc passed
modules/platform/arc/scale_set passed
modules/platform/arc/scale_set_controller passed
modules/platform/arc_deployment passed
modules/platform/ec2_deployment passed
modules/platform/ec2_deployment/ec2_update_runner_ssm_ami passed
modules/platform/ec2_deployment/ec2_update_runner_tags passed
modules/platform/forge_runners passed
modules/platform/forge_runners/forge_trust_validator passed
modules/platform/forge_runners/github_actions_job_logs passed
modules/platform/forge_runners/github_app_runner_group passed
modules/platform/forge_runners/github_global_lock passed
modules/platform/forge_runners/github_webhook_relay passed
modules/platform/forge_runners/github_webhook_relay/source passed
modules/platform/forge_runners/redrive_deadletter passed

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OpenTofu module tests (minimum-supported)

Result: passed

OpenTofu version: 1.11.0

Metric Count
Passed modules 72
Failed modules 0
Total modules 72
Module Result
modules/helpers/ami_policy passed
modules/helpers/ami_sharing passed
modules/helpers/aws_config_recording passed
modules/helpers/cloud_custodian passed
modules/helpers/cloud_formation passed
modules/helpers/dedicated_mac_hosts passed
modules/helpers/ecr passed
modules/helpers/forge_subscription passed
modules/helpers/microvm passed
modules/helpers/opt_in_regions passed
modules/helpers/service_linked_roles passed
modules/helpers/storage passed
modules/infra/eks passed
modules/integrations/github_webhook_relay_destination passed
modules/integrations/github_webhook_relay_destination_receivers passed
modules/integrations/github_webhook_relay_destination_receivers/webex_webhook_relay passed
modules/integrations/splunk_aws_billing passed
modules/integrations/splunk_cloud_conf_shared passed
modules/integrations/splunk_cloud_data_manager passed
modules/integrations/splunk_cloud_data_manager/data_input passed
modules/integrations/splunk_cloud_data_manager/log_group_reconciler passed
modules/integrations/splunk_cloud_data_manager/sec_meta_ec2_tags passed
modules/integrations/splunk_cloud_data_manager_common passed
modules/integrations/splunk_dependency_monitor passed
modules/integrations/splunk_o11y_aws_integration passed
modules/integrations/splunk_o11y_aws_integration_common passed
modules/integrations/splunk_o11y_conf_shared passed
modules/integrations/splunk_o11y_conf_shared/dashboards/arc_runner_operations passed
modules/integrations/splunk_o11y_conf_shared/dashboards/aws_regional_health passed
modules/integrations/splunk_o11y_conf_shared/dashboards/aws_service_limits passed
modules/integrations/splunk_o11y_conf_shared/dashboards/billing passed
modules/integrations/splunk_o11y_conf_shared/dashboards/dependency_probes passed
modules/integrations/splunk_o11y_conf_shared/dashboards/dynamodb passed
modules/integrations/splunk_o11y_conf_shared/dashboards/ebs passed
modules/integrations/splunk_o11y_conf_shared/dashboards/forge_impact passed
modules/integrations/splunk_o11y_conf_shared/dashboards/k8s_control_plane passed
modules/integrations/splunk_o11y_conf_shared/dashboards/lambda passed
modules/integrations/splunk_o11y_conf_shared/dashboards/lambda_control_plane passed
modules/integrations/splunk_o11y_conf_shared/dashboards/metric_ingest passed
modules/integrations/splunk_o11y_conf_shared/dashboards/opencost passed
modules/integrations/splunk_o11y_conf_shared/dashboards/runner_ec2 passed
modules/integrations/splunk_o11y_conf_shared/dashboards/runner_k8s passed
modules/integrations/splunk_o11y_conf_shared/dashboards/runner_usage passed
modules/integrations/splunk_o11y_conf_shared/dashboards/s3 passed
modules/integrations/splunk_o11y_conf_shared/dashboards/s3_control_plane passed
modules/integrations/splunk_o11y_conf_shared/dashboards/sqs passed
modules/integrations/splunk_o11y_conf_shared/dashboards/sqs_control_plane passed
modules/integrations/splunk_o11y_conf_shared/detectors/aws_regional_health passed
modules/integrations/splunk_o11y_conf_shared/detectors/dependency_probes passed
modules/integrations/splunk_o11y_conf_shared/detectors/ec2_runner_health passed
modules/integrations/splunk_o11y_conf_shared/detectors/k8s passed
modules/integrations/splunk_opencost_eks passed
modules/integrations/splunk_otel_eks passed
modules/integrations/splunk_secrets passed
modules/integrations/splunk_stuck_workflow_job_dispatcher passed
modules/integrations/teleport passed
modules/integrations/teleport/tenant passed
modules/platform/arc passed
modules/platform/arc/scale_set passed
modules/platform/arc/scale_set_controller passed
modules/platform/arc_deployment passed
modules/platform/ec2_deployment passed
modules/platform/ec2_deployment/ec2_update_runner_ssm_ami passed
modules/platform/ec2_deployment/ec2_update_runner_tags passed
modules/platform/forge_runners passed
modules/platform/forge_runners/forge_trust_validator passed
modules/platform/forge_runners/github_actions_job_logs passed
modules/platform/forge_runners/github_app_runner_group passed
modules/platform/forge_runners/github_global_lock passed
modules/platform/forge_runners/github_webhook_relay passed
modules/platform/forge_runners/github_webhook_relay/source passed
modules/platform/forge_runners/redrive_deadletter passed

@edersonbrilhante
edersonbrilhante merged commit 8cc83ac into main Aug 31, 2026
15 checks passed
@edersonbrilhante
edersonbrilhante deleted the fix-arc-karpenter-startup-taint branch August 31, 2026 19:25
@github-actions github-actions Bot mentioned this pull request Aug 31, 2026
Merged
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@Nikolaichukr Nikolaichukr Nikolaichukr approved these changes

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@edersonbrilhante @Nikolaichukr