October 2025 (2025-10) monthly summary for scylla-cluster-tests. Focused on stabilizing test infrastructure, improving logging, and modernizing the upgrade pipeline to support robust, reliable tier1 environments.

In September 2025, delivered substantial improvements in Xcloud provisioning, observability, and upgrade workflows for scylla-cluster-tests, while strengthening reliability, governance, and developer experience. The month focused on reducing provisioning friction, improving observability, and tightening security and ownership signals, contributing to faster release cycles and more predictable operations.

August 2025 focused on enhancing cloud provisioning observability, stabilizing credential workflows, and expanding test infrastructure integration. Delivered Scylla Cloud provisioning monitoring and machine connectivity, added local credential file support for scylla-cloud, enabled SSH server with none authentication for Fabric, updated the YCSB DockerHub build, and added log collection from DB nodes in XCloud. These changes improve deployment reliability, security posture, and operational visibility, enabling faster cloud adoption, more robust test coverage, and streamlined CI/CD for Scylla deployments.

July 2025 performance summary for scylla-cluster-tests focused on delivering cross-region AWS AMI management, strengthening test infrastructure and pipeline reliability, and hardening logging/artifact handling. The work accelerates test isolation across accounts, reduces flakiness in the CI pipeline, and improves observability for faster debugging and audits.

June 2025 highlights for scylladb/scylla-cluster-tests: Delivery focus centered on performance testing reliability, telemetry, code quality, and test infrastructure enhancements, aligned with business value such as stable test results, better observability, and cost-conscious cloud practices. The team delivered targeted features that streamline performance dashboards, improve test governance, and modernize the testing stack, while addressing reliability through targeted bug fixes.

May 2025 performance-focused monthly summary for scylla-cluster-tests: Strengthened CI reliability and trigger logic, stabilized test execution, and improved observability. Key outcomes include: CI workflow reliability enhancements; artifact tests stability improvements; core dump upload permission fix; longer Gemini timeouts reducing flaky tests; and Vector.dev logging with Prometheus metrics for monitoring. These changes deliver faster feedback loops, fewer flaky deployments, and better insight into test and runtime behavior. Technologies demonstrated include GitHub Actions, Hydra integration, container tooling (Podman/Docker), sudo-based permissions, and observability with Vector and Prometheus, plus Java 21 base image modernization.

April 2025: Delivered end-to-end core-dump collection and debugging infrastructure for SCT tests, enabling Docker-captured dumps with compression and automatic uploads to S3/Argus, plus systemd-coredump integration and robust handling of executable names in dumps. Enhanced test observability and reliability with a new OVERSIZED_ALLOCATION event and refined skip controls mapped to Scylla Doctor issues. Increased provisioning resilience with an AWS Dedicated Host retry across multiple Availability Zones within the same region. Fixed API parameter handling for Azure gallery image creation by using virtual_machine_id in the storage profile source. Resolved Podman tmpfs mounting issues in the Hydra environment by aligning run_in_docker tmpfs handling with Podman-supported arguments. Technologies demonstrated include Docker tooling, systemd-coredump, S3/Argus integration, observability instrumentation, cross-cloud provisioning strategies, and Podman/Hydra CI reliability.

March 2025 monthly summary for scylla-cluster-tests focusing on delivering business value through reliable CI, security-aligned images, and enhanced observability, while strengthening compatibility with Elasticsearch 7+ and modern Docker workflows.

February 2025: Scylla cluster tests repo delivered strengthened versioning/RC handling, enhanced resource lifecycle management, and multiple bug fixes that improve upgrade reliability, RF update safety, and log collection robustness. These changes reduce upgrade risk, improve cross-cloud capabilities, and demonstrate strong automation and cross-cutting engineering.

January 2025 performance summary for scylla-cluster-tests. Focused on delivering robust upgrade readiness, broader cloud support, and enhanced testing infrastructure to accelerate secure, reliable releases. Key outcomes include: Argus upgrade version reporting enhancements with improved version regex and richer branch/version metadata; Azure support added to the scylla-cluster-tests framework enabling SSH connectivity and Azure VM management; Offline installer simplified by removing python2 and Java packages to reduce maintenance overhead; Comprehensive CI/CD and testing infrastructure improvements including updating integration tests to newer ScyllaDB versions, hardening region handling for non-AWS environments, extended commit linting, Renovate scheduling updates, enabling Docker scanning for workflows, reclassifying Python driver tests as integration tests, and enabling Docker support for stress tooling; OSS-to-enterprise features consolidation in Jenkins pipelines with merging enterprise features into OSS; and log collection and release automation improvements including LogCollector switch to zstd, and Jenkinsfile automation to fetch latest Scylla release.

December 2024 monthly summary for scylla-cluster-tests focusing on business outcomes and technical excellence across two primary repositories. The month delivered tangible reliability, security and deployment improvements, while enabling scalable development workflows and clearer production configurations.

Month: 2024-11 Key focus: reliability, performance testing isolation, security, and cross-platform stability across the Scylla cluster test tooling. Delivered features to optimize resource usage and ensure safe upgrades, while tightening security and test reliability. Key features delivered: - Dedicated AWS hosts management for performance testing (scylladb/scylla-cluster-tests): added dedicated-host support with new config options (use_dedicated_host, aws_dedicated_host_ids, post_behavior_dedicated_host), plus cleanup mechanisms to release unused hosts, tag-based filtering (TestId), and integration with hydra clean-resources for precise resource management. Commits: 1247626c..., eac941fb..., d513ce74... - Stability and dependencies maintenance (scylladbbot/scylla-cluster-tests): upgraded core dependencies and improved test stability/build reliability (Paramiko, Python version pinning, test rewrites, curl usage, ARM image resolution). Commits include: 3418fb9c..., fadd8d38..., 6a52abed..., a74827f2..., 8f16d05a..., 1434c81d... Major bugs fixed: - Dynamic capacity reservation during runtime: ensure use_capacity_reservation is read from instance parameters and applied when adding nodes at runtime. Commit: 7cc3c3f3... - Rolling upgrade downgrade path fix: remove flawed downgrade procedure for scylla-cqlsh to prevent double-downgrade during rolling upgrades. Commit: 9c57e470... - Amazon Linux 2023 Java/Scylla Doctor install reliability: fixes to Java installation and Scylla Doctor collector setup to restore startup/collection. Commit: eba50550... - MySQL connector Python security patch: upgrade mysql-connector-python from 8.0.26 to 9.1.0 to address CVE-2024-21272. Commit: e1341778... - Cross-platform instance name compatibility: sanitize user_prefix by removing non-alphanumeric characters except hyphens to avoid AWS/Docker naming issues. Commit: 952a0cd5... Overall impact and accomplishments: - Increased reliability and performance isolation for performance testing through dedicated hosts, reducing interference and enabling precise lifecycle management. - Strengthened security posture with timely dependency patching (MySQL connector) and more robust build/test pipelines, improving overall product security and stability. - Improved upgrade safety and operational resilience, minimizing risk during rolling upgrades with fixes to downgrade procedures and runtime capacity logic. - Enhanced cross-platform compatibility and resilience, enabling consistent behavior across AWS and Docker deployments, with a stronger focus on automation and resource hygiene. Technologies and skills demonstrated: - AWS dedicated hosts, tag-based resource management, Hydra integration, and automated cleanup – enabling cost control and cleaner test environments. - Runtime capacity management, dynamic provisioning, and robust upgrade workflows. - Dependency management, Python ecosystem hardening (Paramiko, Python pinning), ARM/image handling, and test suite reliability improvements. - Security-minded patching and naming sanitation for cross-platform deployments.