Managed NATS Service

NATS is an open-source, simple, secure, and high performance messaging system. It provides a data layer for cloud native applications, IoT messaging, and microservices architectures.

Parameters

Common parameters

Name	Description	Value
`replicas`	Number of replicas	`2`
`resources`	Explicit CPU and memory configuration for each NATS replica. When left empty, the preset defined in `resourcesPreset` is applied.	`{}`
`resourcesPreset`	Default sizing preset used when `resources` is omitted. Allowed values: nano, micro, small, medium, large, xlarge, 2xlarge.	`nano`
`storageClass`	StorageClass used to store the data	`""`
`external`	Enable external access from outside the cluster	`false`

Application-specific parameters

Name	Description	Value
`users`	Users configuration (see example)	`{}`
`jetstream.enabled`	Enable or disable Jetstream	`true`
`jetstream.size`	Jetstream persistent storage size	`10Gi`
`config.merge`	Additional configuration to merge into NATS config (see example)	`{}`
`config.resolver`	Additional resolver configuration to merge into NATS config (see example)	`{}`

Parameter examples and reference

resources and resourcesPreset

resources sets explicit CPU and memory configurations for each replica. When left empty, the preset defined in resourcesPreset is applied.

resources:
  cpu: 4000m
  memory: 4Gi

resourcesPreset sets named CPU and memory configurations for each replica. This setting is ignored if the corresponding resources value is set.

Preset name	CPU	memory
`nano`	`250m`	`128Mi`
`micro`	`500m`	`256Mi`
`small`	`1`	`512Mi`
`medium`	`1`	`1Gi`
`large`	`2`	`2Gi`
`xlarge`	`4`	`4Gi`
`2xlarge`	`8`	`8Gi`

Last modified 2025-07-18: [docs] Unify parameters order in managed apps reference (dd1341b)