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	Type	Value
`replicas`	Number of replicas	`int`	`2`
`resources`	Explicit CPU and memory configuration for each NATS replica. When left empty, the preset defined in `resourcesPreset` is applied.	`*object`	`{}`
`resources.cpu`	CPU available to each replica	`*quantity`	`null`
`resources.memory`	Memory (RAM) available to each replica	`*quantity`	`null`
`resourcesPreset`	Default sizing preset used when `resources` is omitted. Allowed values: `nano`, `micro`, `small`, `medium`, `large`, `xlarge`, `2xlarge`.	`string`	`nano`
`storageClass`	StorageClass used to store the data	`string`	`""`
`external`	Enable external access from outside the cluster	`bool`	`false`

Application-specific parameters

Name	Description	Type	Value
`users`	Users configuration	`map[string]object`	`{...}`
`users[name].password`	Password for the user	`*string`	`null`
`jetstream`	Jetstream configuration	`object`	`{}`
`jetstream.enabled`	Enable or disable Jetstream. Set to `true` (default) to enable Jetstream for persistent messaging in NATS.	`bool`	`true`
`jetstream.size`	Jetstream persistent storage size. Specifies the size of the persistent storage for Jetstream (message store).	`quantity`	`10Gi`
`config`	NATS configuration	`object`	`{}`
`config.merge`	Additional configuration to merge into NATS config (see example)	`*object`	`{}`
`config.resolver`	Additional resolver configuration to merge into NATS config (see example)	`*object`	`{}`

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 2025-08-18: [docs] Update managed apps reference (e7ddc0f)