availability

Set instances.<namespace>.<instance>.availability to override cluster.availability.default for one instance.

instances.apps.preview = {
  package = packages.echo-server;
  availability = "none";
};

Property	Value
Type	null or none | pod | node | zone
Default	null, which uses cluster.availability.default
Upper bound	cluster.availability.substrate

An override may be higher or lower than the cluster default, provided the substrate supports it. A package’s meta.availability.max may lower the resolved level further and emits a warning when it does. A workload’s own availability.max on its builder call lowers the level for that workload only.

The resolved value is passed to the package as its availability argument and controls derived placement and PodDisruptionBudgets. Explicit instance options, including replica counts, still override package defaults derived from the level, except that a replica count above one under a none ceiling is an evaluation error.