srl-labs/containerlab
Dec 2024 – Jun 2026
14 Months active
Languages Used
GoMarkdownShellYAMLMakefileRobot Frameworkplaintext
Technical Skills
Configuration ManagementContainerizationGo DevelopmentNetwork EmulationTestingDevOps
Kaelem
PROFILE
Kaelem
Over 14 months, contributed to srl-labs/containerlab by engineering features and fixes that advanced network emulation, automation, and developer experience. Delivered robust configuration management for Cisco IOL and SR-SIM, automated lifecycle processes, and integrated Spirent TestCenter support, reducing manual intervention and improving reliability. Enhanced the VS Code extension with Telnet and Wireshark integration, expanded provider schemas, and improved onboarding through comprehensive documentation. Addressed kernel module detection, container orchestration, and real-time progress reporting using Go, Shell scripting, and YAML. Focused on accessibility, error handling, and cross-platform usability, resulting in a more stable, maintainable, and inclusive network automation platform.
Overall Statistics
Feature vs Bugs
76%Features
Repository Contributions
38Total
Bugs
7
Commits
38
Features
22
Lines of code
8,677
Activity Months14
Your Network
69 peopleShared Repositories
69
Adrian Müller (DTT)Member
Alex LuehmMember
Alexandre HassanMember
Alexandre HassanMember
asadarafatMember
asadarafatMember
Benedikt HeineMember
Jonathan KaiserMember
Biplab MalMember
Work History
June 2026
3 Commits • 2 Features
Jun 1, 2026June 2026 — srl-labs/containerlab: Consolidated reliability and UX improvements across kernel module checks, image pull progress, and topology selection. Delivered three user-facing updates that enhance stability, usability, and deploy efficiency. Key effects: - Reduced friction in diverse kernel configurations by robustly recognizing built-in modules during module checks, eliminating false error reports when a kernel builds modules-in by design. - Improved operator feedback during image pulls with a Charm-based, real-time progress UI, reducing perceived latency and troubleshooting time. - Simplified multi-topology workflows with a mini TUI for topology file selection when multiple candidates exist, accelerating configuration setup. Impact and business value: - Higher reliability and smoother deployments in varied environments, lowering support and troubleshooting costs. - Faster container orchestration cycles thanks to clearer progress visibility and easier topology selection. - Strengthened capability to handle enterprise-grade kernel configurations and multi-config scenarios. Technologies/skills demonstrated: - Kernel module loading checks and robust error handling for built-in vs. loadable modules. - Charm-based terminal UI rendering for dynamic status updates. - Lightweight TUI for topology selection to improve UX in multi-file setups. - Collaboration via co-authored commits and cross-functional review.
3 Commits • 2 Features
Jun 1, 2026June 2026 — srl-labs/containerlab: Consolidated reliability and UX improvements across kernel module checks, image pull progress, and topology selection. Delivered three user-facing updates that enhance stability, usability, and deploy efficiency. Key effects: - Reduced friction in diverse kernel configurations by robustly recognizing built-in modules during module checks, eliminating false error reports when a kernel builds modules-in by design. - Improved operator feedback during image pulls with a Charm-based, real-time progress UI, reducing perceived latency and troubleshooting time. - Simplified multi-topology workflows with a mini TUI for topology file selection when multiple candidates exist, accelerating configuration setup. Impact and business value: - Higher reliability and smoother deployments in varied environments, lowering support and troubleshooting costs. - Faster container orchestration cycles thanks to clearer progress visibility and easier topology selection. - Strengthened capability to handle enterprise-grade kernel configurations and multi-config scenarios. Technologies/skills demonstrated: - Kernel module loading checks and robust error handling for built-in vs. loadable modules. - Charm-based terminal UI rendering for dynamic status updates. - Lightweight TUI for topology selection to improve UX in multi-file setups. - Collaboration via co-authored commits and cross-functional review.
June 2026
May 2026
1 Commits • 1 Features
May 1, 2026In May 2026, delivered targeted SR-SIM lifecycle improvements within the containerlab module to enhance endpoint lifecycle automation and reliability. The work focused on practical lifecycle management enhancements, including methods to move and activate endpoints, to streamline deployment workflows and reduce manual intervention.
May 2026
1 Commits • 1 Features
May 1, 2026In May 2026, delivered targeted SR-SIM lifecycle improvements within the containerlab module to enhance endpoint lifecycle automation and reliability. The work focused on practical lifecycle management enhancements, including methods to move and activate endpoints, to streamline deployment workflows and reduce manual intervention.
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 focused on delivering containerized Spirent TestCenter support within the containerlab workflow, improving automated traffic generation capabilities and test reliability. Delivered a containerized SPSTC integration with explicit interface management, and implemented compatibility workarounds to boot Spirent STC in container environments that rely on cgroup v1. The work reduces setup friction and aligns interface naming with Spirent GUI for easier troubleshooting and reproducibility.
1 Commits • 1 Features
Mar 1, 2026March 2026 focused on delivering containerized Spirent TestCenter support within the containerlab workflow, improving automated traffic generation capabilities and test reliability. Delivered a containerized SPSTC integration with explicit interface management, and implemented compatibility workarounds to boot Spirent STC in container environments that rely on cgroup v1. The work reduces setup friction and aligns interface naming with Spirent GUI for easier troubleshooting and reproducibility.
March 2026
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 (2026-02) performance highlights for srl-labs/containerlab centered on reliability, accessibility, and code quality. The team delivered targeted fixes and a branding enhancement that together improve operational readiness and inclusivity for end users.
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 (2026-02) performance highlights for srl-labs/containerlab centered on reliability, accessibility, and code quality. The team delivered targeted fixes and a branding enhancement that together improve operational readiness and inclusivity for end users.
November 2025
3 Commits • 1 Features
Nov 1, 2025November 2025 (2025-11): Focused on improving SR-SIM observability, reliability, and network correctness within srl-labs/containerlab. Delivered container labeling to identify SR-SIM root nodes, addressed a critical networking offload issue, and hardened interface enumeration to tolerate partial failures. These changes reduce mean time to diagnose issues, improve scalability for distributed SR-SIM topologies, and strengthen overall deployment stability. Technologies demonstrated include container orchestration visibility, Linux networking (veth), TX checksum offload considerations, and robust error handling, with clear commit traceability across changes.
3 Commits • 1 Features
Nov 1, 2025November 2025 (2025-11): Focused on improving SR-SIM observability, reliability, and network correctness within srl-labs/containerlab. Delivered container labeling to identify SR-SIM root nodes, addressed a critical networking offload issue, and hardened interface enumeration to tolerate partial failures. These changes reduce mean time to diagnose issues, improve scalability for distributed SR-SIM topologies, and strengthen overall deployment stability. Technologies demonstrated include container orchestration visibility, Linux networking (veth), TX checksum offload considerations, and robust error handling, with clear commit traceability across changes.
November 2025
October 2025
5 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for srl-labs/containerlab focusing on delivering automated SR-SIM configuration generation, robust startup/deployment handling, post-deployment monitoring, and clearer IP management to improve provisioning reliability and observability.
October 2025
5 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for srl-labs/containerlab focusing on delivering automated SR-SIM configuration generation, robust startup/deployment handling, post-deployment monitoring, and clearer IP management to improve provisioning reliability and observability.
September 2025
8 Commits • 3 Features
Sep 1, 2025Concise monthly summary for 2025-09 focusing on business value and technical accomplishments across the srl-labs/containerlab repo. Highlights include branding and repository structure improvements, substantial SR-SIM component enhancements, and topology modeling enhancements that improve deployment reliability and automation.
8 Commits • 3 Features
Sep 1, 2025Concise monthly summary for 2025-09 focusing on business value and technical accomplishments across the srl-labs/containerlab repo. Highlights include branding and repository structure improvements, substantial SR-SIM component enhancements, and topology modeling enhancements that improve deployment reliability and automation.
September 2025
August 2025
2 Commits • 2 Features
Aug 1, 20252025-08 Monthly Summary for srl-labs/containerlab: Delivered two key features that enhance observability and provider extensibility. Key features: integration of Wireshark capture in the Containerlab VS Code extension with user-facing guidance and a VNC-streamed capture container (commit 053446ce2d1324b11c1205cbe13d2fa4773001d4). Added N9KV provider schema (n9kv.yaml) to lay groundwork for N9KV support (commit d61a2f92fc2e9768d727aaf9bcf78024192e873b). Major bugs fixed: none reported this month. Overall impact: Accelerates troubleshooting, simplifies local capture workflows, and expands provider ecosystem readiness. Technologies/skills demonstrated: VS Code extension development, containerized capture via VNC, YAML schema design for provider definitions, documentation and UX improvements.
August 2025
2 Commits • 2 Features
Aug 1, 20252025-08 Monthly Summary for srl-labs/containerlab: Delivered two key features that enhance observability and provider extensibility. Key features: integration of Wireshark capture in the Containerlab VS Code extension with user-facing guidance and a VNC-streamed capture container (commit 053446ce2d1324b11c1205cbe13d2fa4773001d4). Added N9KV provider schema (n9kv.yaml) to lay groundwork for N9KV support (commit d61a2f92fc2e9768d727aaf9bcf78024192e873b). Major bugs fixed: none reported this month. Overall impact: Accelerates troubleshooting, simplifies local capture workflows, and expands provider ecosystem readiness. Technologies/skills demonstrated: VS Code extension development, containerized capture via VNC, YAML schema design for provider definitions, documentation and UX improvements.
July 2025
4 Commits • 3 Features
Jul 1, 2025Delivered four targeted improvements and fixes in 2025-07 for srl-labs/containerlab, focusing on automation, reliability, and UX. Implemented machine-readable CSV export for container inspection, introduced a multi-node 'groups' feature with inheritance to simplify topology management, added real-time Docker image pull progress feedback, and fixed Fedora 42 installation in the quick-install script. These changes reduce manual configuration, improve cross-environment reliability, and enhance user feedback during long-running operations.
4 Commits • 3 Features
Jul 1, 2025Delivered four targeted improvements and fixes in 2025-07 for srl-labs/containerlab, focusing on automation, reliability, and UX. Implemented machine-readable CSV export for container inspection, introduced a multi-node 'groups' feature with inheritance to simplify topology management, added real-time Docker image pull progress feedback, and fixed Fedora 42 installation in the quick-install script. These changes reduce manual configuration, improve cross-environment reliability, and enhance user feedback during long-running operations.
July 2025
April 2025
1 Commits • 1 Features
Apr 1, 2025Month: 2025-04. Focused on expanding configurability and user guidance for the containerlab VS Code extension. Key deliverable: a new Telnet port configuration option (containerlab.node.telnetPort) documented in the extension docs, enabling users to specify the Telnet port when connecting to containers. This aligns with improving flexibility in container access and onboarding for Telnet-based workflows. No major bugs were reported this month; effort concentrated on design, documentation, and safe deployment of the new setting.
April 2025
1 Commits • 1 Features
Apr 1, 2025Month: 2025-04. Focused on expanding configurability and user guidance for the containerlab VS Code extension. Key deliverable: a new Telnet port configuration option (containerlab.node.telnetPort) documented in the extension docs, enabling users to specify the Telnet port when connecting to containers. This aligns with improving flexibility in container access and onboarding for Telnet-based workflows. No major bugs were reported this month; effort concentrated on design, documentation, and safe deployment of the new setting.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary: Delivered targeted documentation enhancements for Containerlab to improve cross-platform onboarding and DevPod integration. The updates reduce setup friction for Windows/WSL users and clarify VS Code extension configuration, enabling faster adoption and smoother development workflows.
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary: Delivered targeted documentation enhancements for Containerlab to improve cross-platform onboarding and DevPod integration. The updates reduce setup friction for Windows/WSL users and clarify VS Code extension configuration, enabling faster adoption and smoother development workflows.
March 2025
February 2025
2 Commits • 2 Features
Feb 1, 2025February 2025 summary for srl-labs/containerlab focused on developer experience enhancements and security automation to accelerate safe lab deployments. Key work includes comprehensive documentation for the Containerlab VS Code extension and automated admin provisioning during quick setup, enabling faster onboarding and reduced manual steps.
February 2025
2 Commits • 2 Features
Feb 1, 2025February 2025 summary for srl-labs/containerlab focused on developer experience enhancements and security automation to accelerate safe lab deployments. Key work includes comprehensive documentation for the Containerlab VS Code extension and automated admin provisioning during quick setup, enabling faster onboarding and reduced manual steps.
January 2025
3 Commits • 1 Features
Jan 1, 2025January 2025 performance focused on strengthening Cisco IOL support in containerlab and cleaning up documentation to prevent misconfigurations. Delivered targeted interface naming validation, improved IOL node mapping, introduced persistent configuration for Cisco IOL devices, and corrected startup example naming to reflect the true IOL node kind. These changes reduce operator error, streamline configuration workflows, and enhance deployment reliability across the repo srl-labs/containerlab.
3 Commits • 1 Features
Jan 1, 2025January 2025 performance focused on strengthening Cisco IOL support in containerlab and cleaning up documentation to prevent misconfigurations. Delivered targeted interface naming validation, improved IOL node mapping, introduced persistent configuration for Cisco IOL devices, and corrected startup example naming to reflect the true IOL node kind. These changes reduce operator error, streamline configuration workflows, and enhance deployment reliability across the repo srl-labs/containerlab.
January 2025
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024—Container Lab (srl-labs/containerlab) Key features delivered: - Cisco IOL node startup configuration and management interface updates: added flexible startup configuration options (full or partial) to be applied on first boot; refined subsequent-boot management interface IP updates to improve network stability. Major bugs fixed: - Fixed management interface and startup configs for IOL (#2347), addressing boot-time configuration reliability and reducing manual remediation. Overall impact and accomplishments: - Improved automation reliability for Cisco IOL node deployments, enabling deterministic startup behavior, more stable network configurations across reboots, and faster lab provisioning with fewer incidents during initial boot sequences. Technologies/skills demonstrated: - Networking automation, Cisco IOL provisioning, containerlab workflow enhancements, configuration management, version control traceability, and robust debugging. Commit references: - 3581550a8ded3d136c9cc656b71bc6599bb9b703
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024—Container Lab (srl-labs/containerlab) Key features delivered: - Cisco IOL node startup configuration and management interface updates: added flexible startup configuration options (full or partial) to be applied on first boot; refined subsequent-boot management interface IP updates to improve network stability. Major bugs fixed: - Fixed management interface and startup configs for IOL (#2347), addressing boot-time configuration reliability and reducing manual remediation. Overall impact and accomplishments: - Improved automation reliability for Cisco IOL node deployments, enabling deterministic startup behavior, more stable network configurations across reboots, and faster lab provisioning with fewer incidents during initial boot sequences. Technologies/skills demonstrated: - Networking automation, Cisco IOL provisioning, containerlab workflow enhancements, configuration management, version control traceability, and robust debugging. Commit references: - 3581550a8ded3d136c9cc656b71bc6599bb9b703
Activity
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Quality Metrics
Correctness90.0%
Maintainability88.2%
Architecture87.6%
Performance82.6%
AI Usage23.6%
Skills & Technologies
Programming Languages
GoMakefileMarkdownRobot FrameworkShellYAMLplaintext
Technical Skills
CI/CDCLI DevelopmentCommand Line InterfaceComponent ConfigurationConcurrencyConfiguration ManagementContainer OrchestrationContainerizationContainerlabData ExportDevOpsDockerDocumentationGoGo Development
Repositories Contributed To
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