DataDog/datadog-agent
Nov 2024 – Feb 2026
9 Months active
Languages Used
GoCPythonYAMLMarkdownShell
Technical Skills
GoSystem AdministrationTestingCode OrganizationConfiguration ManagementNetwork Protocols
Daniel Lavie
PROFILE
Daniel Lavie
Daniel Lavie contributed to the DataDog/datadog-agent repository by developing and refining backend features focused on observability, performance, and reliability for eBPF-based monitoring. He implemented telemetry-enabled HTTP batch flushing, enhanced kernel buffer configurability, and introduced direct eBPF event processing with tunable fallbacks for broader Linux compatibility. Daniel also built robust debugging tools, including structured JSON eBPF map dumps and Python-based leak detection utilities, improving diagnostics and memory safety. His work leveraged Go, C, and Python, emphasizing system programming and network monitoring. Through careful refactoring, targeted bug fixes, and CI/test stabilization, Daniel delivered maintainable solutions that improved agent stability and operational insight.
Overall Statistics
Feature vs Bugs
71%Features
Repository Contributions
20Total
Bugs
5
Commits
20
Features
12
Lines of code
7,997
Activity Months9
Your Network
1100 people
Work History
February 2026
1 Commits
Feb 1, 2026February 2026 monthly summary for DataDog/datadog-agent focusing on memory management and SSL lifecycle improvements. Delivered a critical bug fix to prevent memory leaks in the fd_by_ssl_bio eBPF map by introducing a cleanup hook tied to BIO_free, ensuring map entries are deleted even if SSL_set_bio is not called. Added a regression test validating cleanup when BIO_free is invoked directly. The work enhances long-running agent stability and memory safety in SSL code paths.
1 Commits
Feb 1, 2026February 2026 monthly summary for DataDog/datadog-agent focusing on memory management and SSL lifecycle improvements. Delivered a critical bug fix to prevent memory leaks in the fd_by_ssl_bio eBPF map by introducing a cleanup hook tied to BIO_free, ensuring map entries are deleted even if SSL_set_bio is not called. Added a regression test validating cleanup when BIO_free is invoked directly. The work enhances long-running agent stability and memory safety in SSL code paths.
February 2026
January 2026
1 Commits • 1 Features
Jan 1, 2026Summary for 2026-01 (DataDog/datadog-agent): Delivered TLS traffic monitoring support for Node.js packaged installations, improving observability for deployments installed via package managers by resolving SSL symbols in libnode.so instead of static linking in the node binary.
January 2026
1 Commits • 1 Features
Jan 1, 2026Summary for 2026-01 (DataDog/datadog-agent): Delivered TLS traffic monitoring support for Node.js packaged installations, improving observability for deployments installed via package managers by resolving SSL symbols in libnode.so instead of static linking in the node binary.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 (2025-12) Monthly summary for DataDog/datadog-agent: - Key feature delivered: Python-based eBPF Map Leak Detection Tool for USM, enabling proactive detection of eBPF map leaks by validating entries against active TCP connections and running processes. Commit 52ea6663d6924febee910bbea4fdd20f6988d9bc (USMON-1502) as part of PR #43537. - Major bugs fixed: None reported this month. - Overall impact and accomplishments: Improves USM observability and reliability by reducing risk of stale or leaked eBPF map data, enabling proactive remediation and safer USM instrumentation. - Technologies/skills demonstrated: Python tooling, eBPF, USM, cross-process validation, CI/PR workflows, and integration within the DataDog agent ecosystem.
1 Commits • 1 Features
Dec 1, 2025December 2025 (2025-12) Monthly summary for DataDog/datadog-agent: - Key feature delivered: Python-based eBPF Map Leak Detection Tool for USM, enabling proactive detection of eBPF map leaks by validating entries against active TCP connections and running processes. Commit 52ea6663d6924febee910bbea4fdd20f6988d9bc (USMON-1502) as part of PR #43537. - Major bugs fixed: None reported this month. - Overall impact and accomplishments: Improves USM observability and reliability by reducing risk of stale or leaked eBPF map data, enabling proactive remediation and safer USM instrumentation. - Technologies/skills demonstrated: Python tooling, eBPF, USM, cross-process validation, CI/PR workflows, and integration within the DataDog agent ecosystem.
December 2025
November 2025
4 Commits • 3 Features
Nov 1, 2025Concise monthly summary for DataDog/datadog-agent (Month: 2025-11). Focused on delivering customer value through robust debugging capabilities, leak detection, and improved visibility for eBPF-related components.
November 2025
4 Commits • 3 Features
Nov 1, 2025Concise monthly summary for DataDog/datadog-agent (Month: 2025-11). Focused on delivering customer value through robust debugging capabilities, leak detection, and improved visibility for eBPF-related components.
October 2025
4 Commits • 3 Features
Oct 1, 2025October 2025 monthly summary for DataDog/datadog-agent: Key features delivered include USM DirectConsumer and kernel compatibility enhancements, DirectConsumer kernel fallbacks for older Linux versions, and new system-probe eBPF map inspection tooling. A major bug fix addressed PerCPU eBPF map dumping in the system-probe. These changes extend kernel compatibility, improve performance, and enhance observability, delivering tangible business value through more reliable monitoring and diagnostics across a broader set of environments.
4 Commits • 3 Features
Oct 1, 2025October 2025 monthly summary for DataDog/datadog-agent: Key features delivered include USM DirectConsumer and kernel compatibility enhancements, DirectConsumer kernel fallbacks for older Linux versions, and new system-probe eBPF map inspection tooling. A major bug fix addressed PerCPU eBPF map dumping in the system-probe. These changes extend kernel compatibility, improve performance, and enhance observability, delivering tangible business value through more reliable monitoring and diagnostics across a broader set of environments.
October 2025
July 2025
4 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for DataDog/datadog-agent focusing on stability, readability, and robustness of HTTP monitoring and User Space Monitoring (USM). Delivered three main changes: (1) Event batching mechanism readability enhancement with clarifying comment on name##_batch_events and dynamic RINGBUF switching to improve maintainability; (2) USM robustness improvements including HTTP status code validation with telemetry for invalid codes, ensuring only valid HTTP responses are processed, and disabling uretprobe-based monitoring when kernel bugs are detected, plus TLS monitoring test config updates; (3) HTTP processing stability improvement by removing http_batch_flush calls from two uprobe handlers to prevent race conditions and stabilize network monitoring. Business value: more reliable monitoring, reduced risk of segmentation faults, better diagnostics via telemetry, and easier future maintenance.
July 2025
4 Commits • 2 Features
Jul 1, 2025July 2025 monthly summary for DataDog/datadog-agent focusing on stability, readability, and robustness of HTTP monitoring and User Space Monitoring (USM). Delivered three main changes: (1) Event batching mechanism readability enhancement with clarifying comment on name##_batch_events and dynamic RINGBUF switching to improve maintainability; (2) USM robustness improvements including HTTP status code validation with telemetry for invalid codes, ensuring only valid HTTP responses are processed, and disabling uretprobe-based monitoring when kernel bugs are detected, plus TLS monitoring test config updates; (3) HTTP processing stability improvement by removing http_batch_flush calls from two uprobe handlers to prevent race conditions and stabilize network monitoring. Business value: more reliable monitoring, reduced risk of segmentation faults, better diagnostics via telemetry, and easier future maintenance.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for DataDog/datadog-agent focusing on delivering a targeted, low-risk code improvement and maintaining external behavior. No major bugs fixed this month.
1 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for DataDog/datadog-agent focusing on delivering a targeted, low-risk code improvement and maintaining external behavior. No major bugs fixed this month.
March 2025
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for DataDog/datadog-agent focusing on delivering enhanced observability and stabilizing test quality, with clear business value and technical achievements. Key features delivered: - Telemetry-enabled HTTP batch flush in eBPF and configurability for kernel buffers/pages/data channel sizes to improve observability and tunability of performance-critical paths. Major bugs fixed / maintenance: - Internal Test Helpers Refactor: Renamed helpers.go to helpers_test.go in the events package and updated the build constraint to include tests, improving test clarity and build reliability. Overall impact and accomplishments: - Elevated observability and tunability for kernel-level performance monitoring, enabling faster diagnosis and root-cause analysis of performance events. - Improved CI stability and test reliability by cleaning up test helpers and build constraints, reducing flakiness and maintenance effort. Technologies/skills demonstrated: - eBPF instrumentation, HTTP batch processing, telemetry instrumentation - Go tooling and build/test hygiene (renaming files, build tags, test scaffolding) Committed work (selected commits): - 80f82dfb0a47b74c2d77afeeff5cf32ef2791e32: USMON-1392: HTTP Batch flush with telemetry (#32358) - 03eca6c79e6126820d197593783468b30671afba: USMON-1397: Extract perf/ring buffers sizes to configuration (#32816) - 580c94726be5b6c15839ed62da9d1a6ea54f18ce: USM Refactor - Renamed helpers.go to helpers_test.go (#32913)
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for DataDog/datadog-agent focusing on delivering enhanced observability and stabilizing test quality, with clear business value and technical achievements. Key features delivered: - Telemetry-enabled HTTP batch flush in eBPF and configurability for kernel buffers/pages/data channel sizes to improve observability and tunability of performance-critical paths. Major bugs fixed / maintenance: - Internal Test Helpers Refactor: Renamed helpers.go to helpers_test.go in the events package and updated the build constraint to include tests, improving test clarity and build reliability. Overall impact and accomplishments: - Elevated observability and tunability for kernel-level performance monitoring, enabling faster diagnosis and root-cause analysis of performance events. - Improved CI stability and test reliability by cleaning up test helpers and build constraints, reducing flakiness and maintenance effort. Technologies/skills demonstrated: - eBPF instrumentation, HTTP batch processing, telemetry instrumentation - Go tooling and build/test hygiene (renaming files, build tags, test scaffolding) Committed work (selected commits): - 80f82dfb0a47b74c2d77afeeff5cf32ef2791e32: USMON-1392: HTTP Batch flush with telemetry (#32358) - 03eca6c79e6126820d197593783468b30671afba: USMON-1397: Extract perf/ring buffers sizes to configuration (#32816) - 580c94726be5b6c15839ed62da9d1a6ea54f18ce: USM Refactor - Renamed helpers.go to helpers_test.go (#32913)
November 2024
1 Commits
Nov 1, 2024November 2024 monthly summary focused on stabilizing CI/test reliability for the DataDog/datadog-agent repo. Delivered a targeted fix to Kafka TLS tests by adding a conditional skip on Ubuntu 24.10 to prevent flaky CI failures. Implemented an environment detector to identify specific Ubuntu versions and architectures and applied the skip when configurations are unsupported. This change reduces flaky test runs, shortens CI cycles, and improves overall release readiness.
1 Commits
Nov 1, 2024November 2024 monthly summary focused on stabilizing CI/test reliability for the DataDog/datadog-agent repo. Delivered a targeted fix to Kafka TLS tests by adding a conditional skip on Ubuntu 24.10 to prevent flaky CI failures. Implemented an environment detector to identify specific Ubuntu versions and architectures and applied the skip when configurations are unsupported. This change reduces flaky test runs, shortens CI cycles, and improves overall release readiness.
November 2024
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Quality Metrics
Correctness98.0%
Maintainability90.6%
Architecture96.0%
Performance85.6%
AI Usage22.0%
Skills & Technologies
Programming Languages
CGoMarkdownPythonShellYAML
Technical Skills
Backend DevelopmentCC programmingCI/CDCode OrganizationCommand-Line Interface (CLI) DevelopmentConfiguration ManagementDebuggingDebugging ToolsDebugging toolsGoGo programmingJSON SerializationJSON handlingKernel Development
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