
Over five months, Haesbaert contributed to the elastic/beats and elastic/ecs repositories by building and refining core monitoring and telemetry features. He architected provider-ready modules for Auditbeat, improved File Integrity Monitoring stability on new Linux kernels, and enhanced process tracking with a Quark-backed backend. His work involved deep system programming in Go and C, with a focus on concurrency, kernel development, and schema standardization. By addressing compatibility issues, resource management, and encoding consistency, Haesbaert delivered robust solutions that improved reliability, maintainability, and cross-environment support, demonstrating a strong grasp of backend development and Linux internals in production environments.

May 2025 monthly summary for elastic/beats focusing on Auditbeat File Integrity Monitoring (FIM) stability on newer Linux kernels. Delivered critical fixes to ebpfevents (updated to v0.7.0) and adjusted probes/logic to correctly detect the inet_csk_accept() prototype, restoring FIM reliability across updated kernel versions. This work mitigates kernel-version regressions and preserves security monitoring coverage in evolving environments. Commit 6dfa01bbd010a2b1c908968269f5ed827024ec95 included in the fix.
May 2025 monthly summary for elastic/beats focusing on Auditbeat File Integrity Monitoring (FIM) stability on newer Linux kernels. Delivered critical fixes to ebpfevents (updated to v0.7.0) and adjusted probes/logic to correctly detect the inet_csk_accept() prototype, restoring FIM reliability across updated kernel versions. This work mitigates kernel-version regressions and preserves security monitoring coverage in evolving environments. Commit 6dfa01bbd010a2b1c908968269f5ed827024ec95 included in the fix.
In 2025-03, Elastic Beats delivered a key compatibility feature by extending the seccomp policy to allow faccessat(2) in addition to faccessat2(2), addressing older glibc environments (Ubuntu 20.04) and CGO-based processes used by Beats processors. This change reduces build and runtime failures for users on legacy Linux stacks and aligns with processor workloads. No major bugs were fixed this month; focus remained on security policy coverage and stability. Overall, the update enhances portability and robustness of Beats in diverse environments, supporting broader deployment scenarios and smoother upgrades.
In 2025-03, Elastic Beats delivered a key compatibility feature by extending the seccomp policy to allow faccessat(2) in addition to faccessat2(2), addressing older glibc environments (Ubuntu 20.04) and CGO-based processes used by Beats processors. This change reduces build and runtime failures for users on legacy Linux stacks and aligns with processor workloads. No major bugs were fixed this month; focus remained on security policy coverage and stability. Overall, the update enhances portability and robustness of Beats in diverse environments, supporting broader deployment scenarios and smoother upgrades.
February 2025 monthly summary for elastic/beats: - Focused improvements in test reliability and Linux process telemetry that directly enhance engineering efficiency and production observability. - Key changes include stabilizing Filebeat tests after testify v1.10.0 updates and introducing a Quark-backed Auditbeat system/process backend for enhanced Linux process tracking. - These efforts reduce CI flakiness, shorten triage time, and provide richer ECS-aligned telemetry for critical workloads.
February 2025 monthly summary for elastic/beats: - Focused improvements in test reliability and Linux process telemetry that directly enhance engineering efficiency and production observability. - Key changes include stabilizing Filebeat tests after testify v1.10.0 updates and introducing a Quark-backed Auditbeat system/process backend for enhanced Linux process tracking. - These efforts reduce CI flakiness, shorten triage time, and provide richer ECS-aligned telemetry for critical workloads.
December 2024: Delivered provider-ready architecture for Auditbeat's system/process modules in elastic/beats, laying the groundwork for multi-backend support. Key refactors split the module into common and provider-specific components, extracted shared TTY definitions for reuse, and fixed a resource leak by ensuring bucket.Close() is invoked in New(). These changes improve maintainability, reliability, and accelerate integration with new backends/providers.
December 2024: Delivered provider-ready architecture for Auditbeat's system/process modules in elastic/beats, laying the groundwork for multi-backend support. Key refactors split the module into common and provider-specific components, extracted shared TTY definitions for reuse, and fixed a resource leak by ensuring bucket.Close() is invoked in New(). These changes improve maintainability, reliability, and accelerate integration with new backends/providers.
Month: 2024-11 Overview: - Delivered two targeted improvements across elastic/beats and elastic/ecs, focusing on reliability, standardization, and data integrity. The work emphasizes better runtime stability, more consistent data representations, and clearer governance for encoding standards, enabling smoother integrations and fewer cross-system discrepancies.
Month: 2024-11 Overview: - Delivered two targeted improvements across elastic/beats and elastic/ecs, focusing on reliability, standardization, and data integrity. The work emphasizes better runtime stability, more consistent data representations, and clearer governance for encoding standards, enabling smoother integrations and fewer cross-system discrepancies.
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