Gardenlinux

- Configuration, deployment, and maintenance

- Troubleshooting OS-level, kernel, and package-related issues

- Debugging of custom image builds and runtime behavior

- Recommendations for performance tuning and hardening

B. KVM Virtualization Stack (Cloud Hypervisor, QEMU, and Libvirt)

- Configuration and integration of KVM-based virtualization environments

- Analysis and resolution of hypervisor or VM-level issues

- Performance optimization for compute, networking, and storage layers

- Debugging and tuning Cloud Hypervisor and Libvirt configurations

C. Gardener Kubernetes Platform

- Troubleshooting Gardener control plane and shoot cluster incidents

- Root cause analysis for provisioning, scaling, and upgrade failures

- Configuration review and optimization

- Integration support between Gardener, Gardenlinux, and KVM-based nodes   

Skills:

A. Gardenlinux Expertise

Engineers assigned to Gardenlinux-related support must possess:

- In-depth knowledge of Debian-based Linux systems and kernel configuration

- Experience with Gardenlinux image customization and build pipelines

- Strong skills in package management, systemd, and OS hardening

- Proficiency in debugging performance, boot, and kernel-level issues

- Familiarity with CI/CD integration for OS image deployment and maintenance

B. KVM / Virtualization Expertise

Engineers providing KVM and virtualization support must have:

- Advanced understanding of KVM, QEMU, and Libvirt architecture

- Experience configuring and troubleshooting Cloud Hypervisor environments

- Deep understanding of virtualization networking (bridges, VLANs, SDN) and storage (NFS)

- Knowledge of hardware virtualization and NUMA alignment

- Scripting skills for automation (Golang, Python, Bash)

- Experience with host performance tuning and low-level debugging

C. Gardener Kubernetes Expertise

Engineers supporting Gardener Kubernetes must demonstrate:

- Expert understanding of Kubernetes internals (control plane, networking, scheduling)

- Hands-on experience with Gardener architecture, shoot and seed cluster management

- Familiarity with cluster lifecycle management, upgrades, and node troubleshooting

- Strong knowledge of observability tools (Prometheus, Perses)

- Ability to conduct root cause analysis and contribute to post-mortem reviews

4. Deliverables

- Incident Troubleshooting Reports: Detailed technical documentation per incident

- Root Cause Analysis (RCA) Reports: Formal RCA for P1/P2 incidents

- Configuration Reviews and Recommendations

- Best Practices Documentation

- Knowledge Transfer Sessions