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Drew Welch

PROFILE

Drew Welch

Over nine months, contributed to the app-sre/qontract-reconcile and related repositories by building and enhancing automation for cloud resource management, certificate lifecycle, and alerting workflows. Developed features such as ERV2-based CloudWatch and RDS migration support, robust PKCS#12 certificate handling, and multi-window SLO alerting using Prometheus and Sloth. Leveraged Python, GraphQL, and Terraform to implement secure credential management, schema evolution, and containerized CI/CD pipelines. Focused on reliability and maintainability through test-driven development, refactoring, and observability improvements, while addressing operational pain points like secret versioning, migration automation, and incident prioritization across AWS, Kubernetes, and OpenShift environments.

Overall Statistics

Feature vs Bugs

84%Features

Repository Contributions

37Total
Bugs
4
Commits
37
Features
21
Lines of code
4,096
Activity Months9

Work History

March 2026

1 Commits • 1 Features

Mar 1, 2026

Month: 2026-03 Repository: app-sre/qontract-reconcile Overview: - Focused on expanding migration automation to include RDS resources within the CLI workflow. Implemented ERV2-based RDS provider support in the migration CLI, enabling import of passwords and more robust management of RDS instances during migrations. Key actions: - Added RDS Migration CLI Support (ERV2 provider) to cli migrate, enabling RDS resource handling in migration workflows. - Implemented dedicated handling for RDS resources within the migration workflow, including the ability to import passwords for RDS resources. Impact: - Improved automation and reliability of RDS migrations, reducing manual steps and potential human errors. - Strengthened security during migrations through integrated password handling for RDS resources. - Accelerated end-to-end migration timelines for RDS workloads by enabling seamless CLI-based migrations. Technologies/skills demonstrated: - CLI tooling enhancements and ERV2 provider integration - Migration workflow design for resource-specific handling - Secure handling of credentials during migration - Version control and collaboration practices (git commits) Notes: - No major bugs reported or tracked in this data for this month. Top achievements for 2026-03: 1) RDS Migration CLI Support implemented (ERV2 provider) in cli migrate; commit 10fe1b5a4a7fe2a25031252debbb30b74b1c75af 2) Dedicated RDS resource handling within the migration workflow, including password import for RDS resources 3) Enhanced end-to-end migration automation for RDS, reducing manual steps and potential errors

November 2025

6 Commits • 3 Features

Nov 1, 2025

November 2025: Strengthened security, reliability, and flexibility of the Open Source SRE tooling. Key work spanned external resources management and vault secrets reliability in qontract-reconcile, and schema/certificate capabilities in qontract-schemas, with focused improvements in PKCS#12 support, API resilience, and type safety. Delivered improvements include upgrading hashing from MD5 to SHA-256, cleaning up and safeguarding migration logic, and preventing mutation of cached vault data; defaulting None secret versions to the latest. Introduced PKCS#12 support for RHCS and OpenShift, added API request timeouts, and enhanced certificate handling with StrEnum-based type safety. Updated OpenShift resource schema to expose certificate output format (PEM or PKCS#12).

October 2025

1 Commits

Oct 1, 2025

October 2025: Delivered targeted improvements to the Sloth Ticketing alerting workflow in app-sre/qontract-reconcile. Increased the alert severity for Sloth ticketing alerts to High, and aligned the main alert generation logic and test expectations with this change. This refactor enhances incident prioritization, reduces alert fatigue for non-critical events, and improves reliability of production monitoring.

September 2025

3 Commits • 1 Features

Sep 1, 2025

2025-09 Monthly Summary for app-sre/qontract-reconcile focused on reliability, observability, and secret-management improvements. Key features delivered include enhanced SLO alert generation with annotations and default secret version handling. Major bugs fixed include making VaultClient read_all reliably default to the latest secret version. Overall impact: more robust Prometheus alert rules, improved incident guidance via runbook/dashboard annotations, and predictable secret retrieval reducing operational toil. Technologies demonstrated: Python refactoring, Jinja templating, Prometheus rule generation, end-to-end test improvements, and secret-management practices.

August 2025

9 Commits • 6 Features

Aug 1, 2025

In August 2025, delivered measurable improvements across container images, SRE schemas, and reconciliation tooling. Highlights include faster and more secure container builds, more precise SLO alerting with multi-window Prometheus rules, and robust certificate handling with Sloth-based alert generation, plus flexible templating and up-to-date base images to reduce risk.

July 2025

2 Commits • 2 Features

Jul 1, 2025

July 2025 monthly summary focusing on key features delivered, major bugs fixed, overall impact, and technology stack demonstrated across two repos: app-sre/qontract-reconcile and app-sre/container-images. Emphasis on business value delivered through automation enhancements for certificate reconciliation and ready-to-use tooling in the base image to support future reconciliation workflows.

June 2025

8 Commits • 2 Features

Jun 1, 2025

June 2025: Delivered automated RHCS certificate management enhancements and reinforced stability across the qontract-schemas and qontract-reconcile repos. Key features include RHCS certificate provisioning with new configuration options and resource types, plus provider settings improvements (added CA URL field and renamed url to issuerUrl) to clarify purpose. Implemented a GraphQL-based OpenShift RHCS certificates workflow with certificate generation/renewal logic and Vault-backed storage, alongside TLS secret creation including CA certificates and an expanded monitoring surface with renewal_threshold_days metrics. Hardened reconciliation reliability with deferred oc_map cleanup, conditional cleanup invocation, and a VaultClient singleton to address memory leaks. Added tests for the integration path and improved observability. These efforts reduce manual certificate management, strengthen security posture, and provide measurable expiry visibility across OpenShift environments.

May 2025

4 Commits • 4 Features

May 1, 2025

May 2025 monthly summary for app-sre repositories: Focused on expanding erv2 capabilities, enabling robust CloudWatch resource management, Docker-based Terraform module builds, and enhanced vulnerability reporting through expanded permission sets and schema changes. These changes deliver measurable business value by automating resource provisioning, improving migration workflows, and strengthening access controls and reporting.

April 2025

3 Commits • 2 Features

Apr 1, 2025

April 2025: Focused on advancing ERV2 readiness for CloudWatch Log Groups and strengthening template rendering reliability. Key outcomes include aligning the template renderer local copy with the GraphQL API to prevent rendering inconsistencies; adding ERV2-enabled CloudWatch Log Group support in qontract-reconcile (data model and GraphQL schema updates); and extending qontract-schemas with ERV2 fields for AWS CloudWatch Log Groups to enable lifecycle management and module overrides. The work improves reliability, governance, and migration paths for ERV2 adoption, delivering measurable business value in operational stability and resource management. Technologies demonstrated include Python-based reconciliation logic, GraphQL schema evolution, ERV2 data modeling, and commit traceability (APPSRE-11651, APPSRE-11718).

Activity

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Quality Metrics

Correctness93.8%
Maintainability90.8%
Architecture89.8%
Performance83.0%
AI Usage21.6%

Skills & Technologies

Programming Languages

DockerfileGraphQLHTMLPythonYAMLpythonyaml

Technical Skills

API IntegrationAPI developmentAPI integrationAWSAlertingBackend DevelopmentCI/CDCLI DevelopmentCertificate ManagementCloud EngineeringCloud ManagementCloud NativeCloud Resource ManagementCloudFormationConfiguration Management

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

app-sre/qontract-reconcile

Apr 2025 Mar 2026
9 Months active

Languages Used

GraphQLPythonYAMLpythonDockerfileHTMLyaml

Technical Skills

API IntegrationCloud ManagementDevOpsGitInfrastructure as CodePython

app-sre/qontract-schemas

Apr 2025 Nov 2025
5 Months active

Languages Used

YAMLyaml

Technical Skills

Cloud Resource ManagementSchema DefinitionConfiguration ManagementMonitoringObservabilityOpenShift

app-sre/container-images

Jul 2025 Aug 2025
2 Months active

Languages Used

Dockerfile

Technical Skills

ContainerizationDevOpsCI/CDDockerfile