Services

A Service separates a stable discovery interface from replaceable backends. The before/after sets are model results, not a transport test. Stable discovery does not prove every request succeeds. Endpoint conditions, ports and datapaths need separate checks. The exact local model passed again; no Kubernetes or transport test was run. One address in front of many An ordinary ClusterIP Service keeps a virtual address during that object’s lifetime, and cluster DNS provides a discovery name. Callers can depend on that name while interchangeable Pods are replaced. This separates a stable client-facing contract from the lifecycle of individual backends, without requiring a config push for every replacement. ...

Linger changes when an account’s systemd user manager is kept available. With lingering enabled, logind can start that manager at boot and retain it after the account’s login sessions end. This supports unattended work owned by a normal account. The flag controls manager lifetime; individual services still have their own activation, failure, shutdown, and installation rules. ...