
Yanto Johnes engineered robust CI/CD and code governance solutions across multiple Elastic repositories, including elastic/elastic-agent and elastic/apm-agent-php. He delivered cross-platform test automation, stabilized integration environments, and modernized review workflows by migrating reviewer assignments from Dependabot to CODEOWNERS, streamlining ownership and accelerating approvals. Yanto addressed CI reliability by fixing ASDF initialization under sudo and resolved Docker-based test failures by updating Dockerfiles and base images. He also implemented security hardening in GitHub Actions workflows, mitigating shell injection risks using Bash and YAML. His work demonstrated depth in build automation, DevOps, and security, resulting in more reliable, maintainable, and secure pipelines.

August 2025 highlights: CI/CD security hardening and testing improvements across four Elastic Java repositories. Key deliverables include: (1) manual test triggering via workflow_dispatch in elastic/beats; (2) shell-injection mitigations in elastic/ecs-logging-java, elastic/elastic-otel-java, and elastic/apm-agent-java by routing commands/inputs through environment variables; (3) macOS unit tests BEAT env var fix. These changes reduce security risk, enhance testing flexibility, and improve CI reliability.
August 2025 highlights: CI/CD security hardening and testing improvements across four Elastic Java repositories. Key deliverables include: (1) manual test triggering via workflow_dispatch in elastic/beats; (2) shell-injection mitigations in elastic/ecs-logging-java, elastic/elastic-otel-java, and elastic/apm-agent-java by routing commands/inputs through environment variables; (3) macOS unit tests BEAT env var fix. These changes reduce security risk, enhance testing flexibility, and improve CI reliability.
July 2025 monthly summary: CODEOWNERS-driven governance modernization across Elastic repos, migrating CI reviewer routing from Dependabot to CODEOWNERS in 15 repos, consolidating ownership, automating reviews, and accelerating CI-related changes. Repos include elastic/apm-agent-go, elastic/elastic-package, elastic/oblt-actions, elastic/apm-agent-android, elastic/apm-data, elastic/apm-server, elastic/apm-agent-php, elastic/logstash, elastic/apm-perf, elastic/apm-aws-lambda, elastic/fleet-server, elastic/apm-agent-ruby, elastic/observability-docs, elastic/opentelemetry, elastic/apm-queue. Each commit message indicates a CODEOWNERS migration (e.g., "ci: move from dependabot reviewers to CODEOWNERS"). No explicit bug fixes recorded; focus was governance and automation improvements. Impact: faster PR approvals, consistent ownership, and improved governance for CI workflows. Technologies/skills demonstrated: CODEOWNERS, GitHub CI, Dependabot configuration, per-directory ownership, YAML configurations, cross-team collaboration, and governance discipline.
July 2025 monthly summary: CODEOWNERS-driven governance modernization across Elastic repos, migrating CI reviewer routing from Dependabot to CODEOWNERS in 15 repos, consolidating ownership, automating reviews, and accelerating CI-related changes. Repos include elastic/apm-agent-go, elastic/elastic-package, elastic/oblt-actions, elastic/apm-agent-android, elastic/apm-data, elastic/apm-server, elastic/apm-agent-php, elastic/logstash, elastic/apm-perf, elastic/apm-aws-lambda, elastic/fleet-server, elastic/apm-agent-ruby, elastic/observability-docs, elastic/opentelemetry, elastic/apm-queue. Each commit message indicates a CODEOWNERS migration (e.g., "ci: move from dependabot reviewers to CODEOWNERS"). No explicit bug fixes recorded; focus was governance and automation improvements. Impact: faster PR approvals, consistent ownership, and improved governance for CI workflows. Technologies/skills demonstrated: CODEOWNERS, GitHub CI, Dependabot configuration, per-directory ownership, YAML configurations, cross-team collaboration, and governance discipline.
June 2025 monthly summary: Delivered targeted reliability and governance improvements across three repositories. In elastic/apm-agent-php, fixed CI Docker apt installation failures by updating Dockerfiles, installing apt-transport-https, and upgrading the base image to Ubuntu 22.04, improving test stability. In elastic/package-spec, adjusted Dependabot PR reviewer handling by removing the reviewers field, preserving daily updates and labeling. In elastic/package-registry, centralized code ownership by updating CODEOWNERS to include ecosystem reviewers and removing reviewers from dependabot.yml to standardize reviews. These changes reduce flaky CI runs, simplify contribution workflows, and strengthen ownership accountability.
June 2025 monthly summary: Delivered targeted reliability and governance improvements across three repositories. In elastic/apm-agent-php, fixed CI Docker apt installation failures by updating Dockerfiles, installing apt-transport-https, and upgrading the base image to Ubuntu 22.04, improving test stability. In elastic/package-spec, adjusted Dependabot PR reviewer handling by removing the reviewers field, preserving daily updates and labeling. In elastic/package-registry, centralized code ownership by updating CODEOWNERS to include ecosystem reviewers and removing reviewers from dependabot.yml to standardize reviews. These changes reduce flaky CI runs, simplify contribution workflows, and strengthen ownership accountability.
December 2024: Stabilized the CI environment for elastic/elastic-agent by addressing ASDF initialization under sudo in Buildkite, ensuring root environments access correct tool versions, and improving CI reliability and reproducibility.
December 2024: Stabilized the CI environment for elastic/elastic-agent by addressing ASDF initialization under sudo in Buildkite, ensuring root environments access correct tool versions, and improving CI reliability and reproducibility.
November 2024 monthly summary for elastic/elastic-agent focusing on business value and technical achievements. Delivered cross-platform CI/CD improvements and enhanced test analytics, strengthening release confidence and software quality. Key outcomes include enabling RHEL8 CI/CD testing via a new Buildkite pipeline configuration, applying a minor fix to the sudo integration test script to correctly set HOME for asdf, and introducing the test-collector plugin to gather JUnit results (build/TEST-*.xml) across pipelines on the main branch with debugging enabled.
November 2024 monthly summary for elastic/elastic-agent focusing on business value and technical achievements. Delivered cross-platform CI/CD improvements and enhanced test analytics, strengthening release confidence and software quality. Key outcomes include enabling RHEL8 CI/CD testing via a new Buildkite pipeline configuration, applying a minor fix to the sudo integration test script to correctly set HOME for asdf, and introducing the test-collector plugin to gather JUnit results (build/TEST-*.xml) across pipelines on the main branch with debugging enabled.
Overview of all repositories you've contributed to across your timeline