Open-source infrastructure for businesses
Open-source technologies are no longer just an “alternative” but the foundation of modern IT strategies: Linux in the data center, container platforms, automation, observability, and secure network boundaries. Today, the decisive factor is less the choice of tools than the question of whether an environment remains stable under patch pressure, supply chain changes, and team changes—and whether it can be justified in a comprehensible manner in relation to internal controls or external requirements.
Comelio GmbH supports companies in setting up and developing open-source infrastructure in such a way that operation, security, and speed are all in harmony. This ranges from practical trainings and enablement formats to project-based implementation – always with a focus on clean architecture, documented operating standards, and knowledge transfer that empowers teams to work independently.
Those who are “modernizing” today do not need PowerPoint architecture, but rather systems that can handle updates, have clear ownership, and can be reproducibly restored in the event of a failure.
Orientation
Newcomers are rarely looking for “just another tool,” but rather a clear roadmap: Where do you start, which decisions are truly business-critical, and where is it worth digging deeper before burning through money, time, or stability? The following four areas form the framework for our content. They are structured in such a way that decision-makers can quickly understand what is at stake – and technical teams can jump straight into the detailed topics if they have specific questions about operation, security, lifecycle, or automation. As a basis for terminology: Open Source Definition (OSI).
Linux
Linux is the basis of many platforms – but operational quality only comes about through standards: update and rollback capabilities, rights and identity concepts, hardening, automation, and troubleshooting routines. This is about server operation that remains delegable instead of being tied to individual knowledge.
IT infrastructure
Network, segmentation, firewall/VPN, monitoring/logging, storage – this block combines operation and security. In practice, this is where it is decided whether disruptions can be quickly contained and whether security measures can be integrated into everyday operations without friction, especially under patch and change pressure.
Virtualization
Virtualization is not just “running workloads somewhere,” but an operating model: capacity, availability, recovery, updates, and ownership. Whether KVM/Proxmox, Kubernetes, or private cloud building blocks – it is important that platforms remain maintainable and that lifecycle decisions do not become lock-ins.
Applications
Ultimately, what counts is how applications can be integrated, operated, and modified: databases, mail/collaboration, reverse proxies, DevOps tooling, documentation systems. The focus is on stable data paths, clean interfaces, and operational chains that continue to function even after updates.
Target groups
- IT management & managers: when operations need to be more predictable and decisions need to be documented in a reliable manner.
- Platform/ops teams: when standards, update paths, troubleshooting routines, and automation are lacking or need to be developed in everyday operations.
- Security/audit-related roles: when measures need to be integrated into operations and change processes in a traceable manner (depending on the environment).
Collaboration
Open-source infrastructure is rarely a single project, but rather a series of decisions: operating model, updateability, security routines, and integration into existing teams. Comelio GmbH provides support in a variety of ways – from knowledge transfer to concrete implementation. The following services provide a compact overview of how we relieve teams and simultaneously build decision-making capabilities in operations.
Trainings & Enablement
Practical training for teams that not only want to “know” open-source platforms, but also want to operate them confidently. Content is based on real operational issues: updates, hardening, observability, troubleshooting, and clean operational handoffs.
Implementation & Stabilization
Support for setting up, modernizing, and stabilizing Linux, network, and platform environments. The focus is on reproducible configurations, documented operating routines, and a handover that works in everyday life.
System Hardening & Baselines
Hardening, segmentation, IAM-related topics, and security routines that “run” alongside operations. Depending on the environment, this also includes traceable measures in the context of common standards and audit-related requirements.
Competence Call (Remote Review & Troubleshooting)
Selective support for diagnosis, review, and decision-making issues: log analysis, upgrade planning, architecture feedback, or troubleshooting. Lean format – suitable when clarity is needed quickly.
Initial consultation / Project initiation
If you would like to classify a project related to open-source infrastructure—such as modernization, lifecycle change, or stabilization in operation—it is worth having a brief initial consultation. During this consultation, we will clarify the target vision and constraints, prioritize the next steps, and outline a realistic implementation framework.
References
In the area of open-source infrastructure and platform operation, we support companies in bringing together operation, security, and lifecycle in a clean manner – from review to implementation. The examples are anonymized and deliberately kept short.
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Hardening baseline for Linux servers including Lynis scoring and deviation logic (baseline vs. exception), plus review routine for updates and hardening.
Industry / DACH
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Migration of VMware workloads to KVM/Proxmox, including migration planning, VLAN design, storage connection, and documented operating routines (backup/restore, maintenance windows).
IT service provider / North Rhine-Westphalia
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Stabilization of a Kubernetes cluster: upgrade paths, RBAC/namespaces, ingress/TLS standard, logging/monitoring, and runbooks for incident handling.
Public sector / North Rhine-Westphalia
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Segmentation and remote access with OPNsense/WireGuard: rule set reduction, traceable firewall policies, admin access concept, and VPN hardening.
Logistics & Trade / DACH
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Database migration Oracle → PostgreSQL incl. schema/query review, cutover plan, performance checks, and operational handover for backup/recovery.
Industry / DACH