Skill map

Production operations

Operates distributed services safely through change and failure. As Site Reliability Engineer needs it.

Careers that require it

Concrete operational procedures from the courses on this page.

How to upgrade a production Kubernetes cluster one minor version
Moving a self-managed kubeadm cluster forward one Kubernetes minor version, including the version-skew rules and pre-flight checks that decide whether the upgrade can proceed at all.
Kubernetes Operations
How to drain and replace a worker node safely
Taking a worker node out of service for disruptive work or retirement without breaching any workload's availability guarantee, and returning it or removing it cleanly afterward.
Kubernetes Operations
How to renew expiring kubeadm control-plane certificates
Renewing the one-year kubeadm control-plane certificates before they expire, and the offline recovery path for a cluster whose certificates have already lapsed and whose API server is down.
Kubernetes Operations
How to rebuild a Kubernetes control plane from an etcd snapshot
The last-resort recovery when etcd data is lost or corrupt beyond quorum: replacing entire cluster state from a snapshot, with the data-loss and reconciliation consequences that come with it.
Kubernetes Operations
How to migrate deprecated Kubernetes API usage before an upgrade
Clearing an upgrade blocker by locating every client, manifest, and controller still calling a Kubernetes API version the next minor removes, and proving the usage is gone before the upgrade.
Kubernetes Operations