Day by Day
Day by Day is an independent IT consultancy and services company in Breda, the Netherlands. We work on live Linux platforms: Kubernetes, OpenStack, Ceph storage, and the networking underneath them. No vendor agreements, nothing to resell.
Most work ends with you running the platform. If you would rather not be the only person who understands it, we stay on.
Design and migration planning for Linux platforms: Kubernetes, OpenStack, cloud and bare metal. We size for the load you actually run and name the failure domains; cost and operational risk sit in the design document, not in an appendix. The result is a plan that can be built from.
Provisioning, configuration management and delivery pipelines with Ansible and Puppet, committed to your GitLab or GitHub. Automation your team can read, change and hand over — not scripts that only work once.
Reliability work on production platforms: monitoring and alerting that only pages for things someone can act on, runbooks an on-call engineer can follow at 03:00, high-availability changes, and the production-readiness fixes that get dropped when a project runs late.
Support runs on a schedule rather than a scramble: patching and upgrades, capacity and backup checks, and someone watching the alerts — for the platforms we built, and for the ones we did not. Response times and coverage are agreed per client.
Root-cause analysis for production faults, performance regressions, failed upgrades, and the intermittent failures nobody can reproduce. We plan and run migrations the same way: VMware or bare metal onto Kubernetes on libvirt or OpenStack, an ageing OpenStack onto a current release, on-premises estates into cloud or VPS. Dependencies, sequencing, cutover and rollback are settled before anything moves.
Stability work on a multi-petabyte Ceph platform: tracing the failures to their causes until the storage was dependable enough to serve as the backend for an OpenStack cloud.
Configuration management and continuous integration introduced across several development teams. Single-node systems rebuilt as highly available clusters, so a failed node is no longer an outage.
Clusters on several continents, over a thousand servers at peak: built from scratch, and operated afterwards.
Engagements run from a single migration to years of platform support. They start with one problem or change: a platform review, a migration, an automation rollout, an upgrade, or a fault that keeps coming back. Scope and the finished result are agreed before the work starts; from there it runs through diagnosis or design, implementation, and handover.
Pricing follows the nature of the work: a fixed price per project where the result can be defined up front, or an hourly rate where it cannot.
What you get depends on the work: a written design, the change carried through, automation your team can maintain, and documentation written for the people who will use it. Where you want continuity, we stay on the platform. Where you want independence, you get that too — the work is handed over in a state your own team can run and change without us.
Day by Day was founded in 2005 by Gerben Meijer, who has been running production Linux for more than two decades: storage, platforms, automation, and the faults nobody had explained yet.
Clients are mostly mid-sized companies that run their own infrastructure, across automotive, healthcare and technology. We work on-site in the Netherlands and Belgium, and remotely worldwide. Client names stay off this page; yours would too.
For platform engineering, migration, automation, troubleshooting, or production reliability work, email or call Day by Day. If possible, include the platform involved, the problem or change required, urgency, and any known constraints.
