AtlasDeployment Custom Resource

Migration to Flex Clusters

Breaking Changes with Atlas Kubernetes Operator 2.0

About the AtlasDeployment Custom Resource

The AtlasDeployment custom resource configures your MongoDB cluster or Flex cluster in Atlas. When you create the AtlasDeployment custom resource, Atlas Kubernetes Operator tries to create or update a cluster or Flex cluster in Atlas.

Atlas Kubernetes Operator does one of the following actions depending on the values you specify in the AtlasDeployment custom resource:

• If you specify values for fields under spec.deploymentSpec, Atlas Kubernetes Operator uses the Atlas Clusters API Resource to create a new cluster or update an existing cluster.

• If you specify values for fields under spec.flexSpec, Atlas Kubernetes Operator uses the Atlas Flex Instance API Resource to create a new Flex cluster or update an existing Flex cluster.

Creating or updating a cluster or Flex cluster can take up to 10 minutes. Atlas Kubernetes Operator monitors the update process.

You can run the following command to check on the status:

kubectl get atlasdeployment -o yaml

The following example shows the status section of a cluster that is provisioning:

status:
  conditions:
  - lastTransitionTime: "2024-03-18T16:32:43Z"
    status: "False"
    type: ClusterReady
    reason: ClusterCreating
    message: Cluster is provisioning

The ClusterReady status will change to True when the cluster or Serverless instance is ready.

Examples

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: my-atlas-cluster
  namespace: mongodb-atlas-system
spec:
  projectRef:
    name: my-project
  deploymentSpec:
    name: test-cluster
    tags:
    - key: "environment"
      value: "production"
    replicationSpecs:
      - zoneName: US-Zone
        numShards: 3
        regionConfigs:
          - regionName: CENTRAL_US
            providerName: GCP
            backingProviderName: GCP
            priority: 7
            electableSpecs:
              instanceSize: M10
              nodeCount: 3
status:
  conditions:
  - lastTransitionTime: "2024-03-18T16:32:43Z"
    status: "True"
    type: Ready
  - lastTransitionTime: "2024-03-18T16:32:43Z"
    status: "True"
    type: ClusterReady
  connectionStrings:
    standard: mongodb://test-cluster-shard-00-00.kpc8f.mongodb.net:27017,test-cluster-shard-00-01.kpc8f.mongodb.net:27017,test-cluster-shard-00-02.kpc8f.mongodb.net:27017/?ssl=true&authSource=admin&replicaSet=atlas-1gm1pv-shard-0
    standardSrv: mongodb+srv://test-cluster.kpc8f.mongodb.net
  mongoDBVersion: 6.0
  mongoURIUpdated: "2024-03-12T12:21:41Z"
  observedGeneration: 1
  stateName: IDLE

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: test-cluster-name
  namespace: mongodb-atlas-system
spec:
  projectRef:
    name: development
  deploymentSpec:
    clusterType: REPLICASET
    name: service-name
    tags:
    - key: "environment"
      value: "production"
    backupEnabled: true
    replicationSpecs:
      - numShards: 1
        regionConfigs:
         - regionName: EASTERN_US
           providerName: GCP
           autoScaling:
             diskGB:
               enabled: true
             compute:
               enabled: true
               scaleDownEnabled: true
               minInstanceSize: M30
               maxInstanceSize: M40
           analyticsSpecs:
             instanceSize: M30
             nodeCount: 1
           electableSpecs:
             instanceSize: M30
             nodeCount: 3
           priority: 7
           readOnlySpecs:
             instanceSize: M30
             nodeCount: 1

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: my-atlas-cluster
spec:
  projectRef:
    name: my-project
  deploymentSpec:
    name: test-cluster
    tags:
    - key: "environment"
      value: "production"
    replicationSpecs:
      - zoneName: Zone 1
        regionConfigs:
         - electableSpecs:
             instanceSize: M10
             nodeCount: 3
           providerName: AWS
           regionName: US_EAST_1
           priority: 7
  processArgs:
    javascriptEnabled: false

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: test-cluster-name
  namespace: mongodb-atlas-system
spec:
  projectRef:
    name: my-project
  flexSpec:
    name: flex-cluster
    tags:
      - key: "environment"
        value: "production"
    providerSettings:
      backingProviderName: AWS
      regionName: US_EAST_1

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: test-cluster-name
  namespace: mongodb-atlas-system
spec:
  projectRef:
    name: development
  serverlessSpec:
    name: serverless-instance
    tags:
    - key: "environment"
      value: "production"
    providerSettings:
      providerName: AWS
      regionName: US_EAST_1

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: my-atlas-cluster
spec:
  projectRef:
    name: my-project
  deploymentSpec:
    clusterType: REPLICASET
    name: tenantCluster
    tags:
    - key: "environment"
      value: "production"
    replicationSpecs:
      - zoneName: Zone 1
        regionConfigs:
        priority: 7
        - electableSpecs:
            instanceSize: M10
            nodeCount: 3
          providerName: AWS
          regionName: US_EAST_1

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: my-atlas-cluster
spec:
  projectRef:
    name: my-project
  deploymentSpec:
    clusterType: REPLICASET
    name: tenantCluster
    tags:
    - key: "environment"
      value: "production"
    replicationSpecs:
      - regionConfigs:
        - electableSpecs:
            instanceSize: M10
            nodeCount: 3
          providerName: AWS
          regionName: US_EAST_1
          priority: 7
        - electableSpecs:
            instanceSize: M10
            nodeCount: 2
          providerName: AZURE
          regionName: US_EAST_2
          priority: 6
        - electableSpecs:
            instanceSize: M10
            nodeCount: 2
          providerName: GCP
          regionName: CENTRAL_US
          priority: 5

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: my-atlas-cluster
  namespace: mongodb-atlas-system
spec:
  deploymentSpec:
    backupEnabled: true
    clusterType: REPLICASET
    name: Test-cluster-M10
    replicationSpecs:
    - regionConfigs:
      - backingProviderName: AWS
        electableSpecs:
          instanceSize: M10
          nodeCount: 3
        priority: 7
        providerName: AWS
        regionName: US_EAST_1
      zoneName: Zone 1
    searchIndexes:
    - DBName: sample_training
      collectionName: grades
      name: test-vector-search-index
      type: vectorSearch
      vectorSearch:
        fields:
        - numDimensions: 1000
          path: student_id
          similarity: euclidean
          type: vector
    - DBName: sample_airbnb
      collectionName: listingsAndReviews
      name: my-index
      search:
        mappings:
          dynamic: true
        searchConfigurationRef:
          name: atlassearchindexconfig-sample
          namespace: mongodb-atlas-system
      type: search
    terminationProtectionEnabled: false
  projectRef:
    name: my-project
    namespace: mongodb-atlas-system

apiVersion: atlas.mongodb.com/v1
kind: AtlasDeployment
metadata:
  name: my-atlas-cluster
  namespace: mongodb-atlas-system
spec:
  deploymentSpec:
    backupEnabled: true
    clusterType: REPLICASET
    name: Test-cluster-M10
    replicationSpecs:
    - regionConfigs:
      - backingProviderName: AWS
        electableSpecs:
          instanceSize: M10
          nodeCount: 3
        priority: 7
        providerName: AWS
        regionName: US_EAST_1
      zoneName: Zone 1
    searchNodes:
    - instanceSize: S20_HIGHCPU_NVME
      nodeCount: 2

Parameters

This section describes some of the key AtlasDeployment custom resource parameters available.

• For a full list of available parameters for clusters, see the Atlas Clusters API.

• For a full list of available parameters for Flex clusters, see the Atlas Flex Clusters API.

See Notes on Transition To Flex Clusters for full information on changes.

To customize your specifications, refer to these descriptions, the available examples, and the API documentation.

spec.backupRef

Type: object

Optional

List that contains the details for the AtlasBackupSchedule Custom Resource that you want to apply. You can specify one backup schedule per cluster.

spec.backupRef.name

Type: string

Optional

metadata.name value within the AtlasBackupSchedule Custom Resource for the backup schedule that you want to apply. You can specify only one backup schedule per cluster, but you can use the same backup schedule for multiple clusters.

If you omit this parameter, Atlas doesn't apply your backup configuration to this cluster.

spec.backupRef.namespace

Type: string

Optional

String that indicates the namespace that contains the AtlasBackupSchedule Custom Resource for the backup schedule that you want to apply.

spec.configServerManagementMode

Type: string

Optional

Default: ATLAS_MANAGED

Configuration that defines the Server Management Mode for creating or updating a sharded cluster. The possible values are:

• ATLAS_MANAGED: Atlas may automatically switch the cluster's config server type for optimal performance and savings.

• FIXED_TO_DEDICATED: The cluster always uses a dedicated config server.

Learn more about MongoDB Sharded Cluster Config Servers.

spec.connectionSecret.name

Type: string

Conditional

Name of the opaque secret that contains the organization ID and API keys that Atlas Kubernetes Operator uses to connect to Atlas. If unspecified, Atlas Kubernetes Operator falls back to either:

• The spec.connectionSecretRef.name parameter of the parent atlasProject

• The default global secret, if spec.connectionSecretRef.name is undefined for the parent atlasProject

This parameter is mandatory for independent CRDs.

spec.deploymentSpec

Type: array

Conditional

List that contains the cluster parameters from the API. For a full list of available parameters, see the Atlas Clusters API.

Important

You must specify spec.deploymentSpec or spec.flexSpec in your configuration.

See Notes on Transition To Flex Clusters for full information on changes.

spec.deploymentSpec.name

Type: string

Conditional

String that identifies the name of the cluster. The name must contain only letters, numbers, and dashes and can't be modified after deployment creation.

spec.deploymentSpec.clusterType

Type: string

Conditional

Human-readable label that identifies cluster type to create.

When should you use this parameter?

Condition	Necessity
You set spec.deploymentSpec.replicationSpecs.	Required
You are deploying Global Clusters.	Required
You are deploying non-Global replica sets and sharded clusters.	Optional

Atlas accepts:

Value	Cluster Type
REPLICASET	replica set
SHARDED	sharded cluster
GEOSHARDED	global cluster

spec.deploymentSpec.customZoneMapping

Type: array

Required

List that contains Global Cluster parameters that map zones to geographic regions. For a full list of available parameters, see the Atlas Global Clusters API.

spec.deploymentSpec.customZoneMapping.location

Type: string

Required

Code that represents a location that maps to a zone in your Global Cluster.

spec.deploymentSpec.customZoneMapping.zone

Type: string

Required

Human-readable label that identifies the zone in your Global Cluster.

spec.deploymentSpec.diskSizeGB

Type: number

Optional

Capacity, in gigabytes, that indicates the host's root volume. Increase this number to add capacity, up to a maximum possible value of 4096 (4 TB). You must specify a positive number for this value.

You can't set this value for clusters with local NVMe SSDs.

Note

If you enable auto-scaling for diskGB in any region, you can't edit this option. To learn more, see spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.diskGB.enabled.

The minimum disk size for dedicated clusters is 10 GB for AWS and Google Cloud. If you specify this setting with a lower disk size, Atlas defaults to the minimum disk size value.

If your database deployment includes Azure nodes, this value must correspond to an existing Azure disk type (8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096).

Atlas calculates storage charges differently depending on whether you choose the default value or a custom value.

Atlas has disk capacity limits on single replica sets, scaling up to 4 TB for higher cluster tiers. To expand the total cluster storage beyond default limits, you can enable extended storage in the Project Settings. To accommodate further scaling in the future, we recommend that you enable sharding for long-term expansion.

If your database deployment spans cloud service providers, this value defaults to the minimum default of the providers involved.

To learn more, see Storage Capacity.

spec.deploymentSpec.encryptionAtRestProvider

Type: string

Optional

Cloud service provider that manages the customer key for this cluster. You must set this value to enable encryption at rest using customer-managed keys for this cluster, which provides an additional layer of encryption. To learn more, see Encrypt Data Using a Key Management Service.

Atlas accepts the following values:

Value	Cloud Provider
AWS	Amazon AWS
GCP	Google Cloud
AZURE	Microsoft Azure
NONE	No provider; the cluster doesn't encrypt data using customer-managed keys.

spec.deploymentSpec.managedNamespaces

Type: array

Required

List that contains information to create a managed namespace in a specified Global Cluster to create. For a full list of available parameters, see the Atlas Global Clusters API.

spec.deploymentSpec.managedNamespaces.collection

Type: string

Required

Human-readable label of the collection to manage in this Global Cluster.

spec.deploymentSpec.managedNamespaces.db

Type: string

Required

Human-readable label of the database to manage in this Global Cluster.

spec.deploymentSpec.managedNamespaces.isCustomShardKeyHashed

Type: boolean

Optional

Flag that indicates whether to hash the custom shard key for the specified collection. This parameter defaults to false.

• Set to true to enable a custom shard key for the collection.

• Set to false to disable a custom shard key for the collection. If diabled, MongoDB uses ranged sharding.

To learn more, see Hashed Shard Keys.

spec.deploymentSpec.managedNamespaces.isCustomShardKeyUnique

Type: boolean

Optional

Flag that indicates whether the custom shard key for the specified collection is unique. This parameter defaults to false.

• Set to true to enable a unique custom shard key for the collection.

• Set to false to disable a unique custom shard key for the collection.

spec.deploymentSpec.managedNamespaces.numInitialChunks

Type: integer

Optional

Minimum number of chunks to initially create when sharding an empty collection with a hashed shard key.

To learn more, see Shard a Global Collection.

spec.deploymentSpec.managedNamespaces.presplitHashedZones

Type: boolean

Optional

Flag that indicates whether MongoDB Cloud should create and distribute initial chunks for an empty or non-existing collection. This parameter defaults to false.

• Set to true to have MongoDB Cloud create and distribute initial chunks for an empty or non-existing collection.

• Set to false to not have MongoDB Cloud create and distribute initial chunks for an empty or non-existing collection..

spec.deploymentSpec.mongoDBMajorVersion

Type: string

Optional

Version of the cluster to deploy. Atlas supports the following MongoDB versions for M10+ clusters:

• 5.0

• 6.0

• 7.0

• 8.0

The following conditions produce the following results:

Condition	Result
You omit this parameter and you omit the spec.deploymentSpec.versionReleaseSystem parameter.	Atlas deploys a cluster that runs MongoDB 7.0.
You omit this parameter and you set the spec.deploymentSpec.versionReleaseSystem parameter to LTS.	Atlas deploys a cluster that runs MongoDB 7.0.
Atlas deprecated M2 and M5 clusters and Serverless instances. To learn more, see Migration to Flex Clusters. Set the spec.deploymentSpec.replicationSpecs.regionConfigs.electableSpecs.instanceSize parameter to M0, M2, or M5.	You must deploy MongoDB 7.0 or later.
You specify this parameter.	Atlas always deploys the cluster with the latest stable patch release of the specified version.
You set the spec.deploymentSpec.versionReleaseSystem parameter to CONTINUOUS.	You must omit this parameter.

spec.deploymentSpec.pitEnabled

Type: boolean

Conditional

Note

Atlas deprecated M2 and M5 clusters and Serverless instances. In the near future, Atlas will automatically migrate all M2 and M5 clusters to Flex clusters. For Serverless instances, Atlas will determine whether to migrate instances to Free clusters, Flex clusters, or Dedicated clusters according to your usage, then migrate your Serverless instances automatically.

To preserve backwards compatibility of the APIs for a period of time, Atlas will continue to allow for these migrated clusters to be managed through the same APIs (old and new APIs), including when using Atlas Kubernetes Operator. The backwards compatibility of APIs will remain in place until January 2026, when the old APIs will be removed and only APIs related to Flex clusters will remain in place.

Support for private endpoints on Serverless instances will end in March 2025. You must update your Atlas Kubernetes Operator configurations to remove private endpoints by March 2025. You must remove all remaining M2, M5, and Serverless instance features from your Atlas Kubernetes Operator configurations before January 2026.

If your workloads require Private Endpoints or Continuous Backup, switch to Atlas Dedicated Clusters. To learn more, see Migration to Flex Clusters and the Atlas Flex Migration Guide.

Configuration that enables continuous cloud backup. To enable continuous cloud backup, you must specify true for this setting.

spec.deploymentSpec.replicationSpecs

Type: array of objects

Conditional

List that contains the configurations for your cluster regions. Use this parameter for multi-region clusters. You must set either spec.deploymentSpec.replicationSpecs.regionConfigs.regionName or spec.deploymentSpec.replicationSpecs.

When should you use this parameter?

Condition	Necessity	Values
You are deploying Global Clusters.	Required	Each object in the array represents a zone where Atlas deploys your cluster's nodes.
You are deploying non-Global replica sets and sharded clusters.	Optional	This array has one object representing where Atlas deploys your cluster's nodes.

If you specify this parameter, you must also specify spec.deploymentSpec.clusterType and spec.deploymentSpec.replicationSpecs.numShards.

spec.deploymentSpec.replicationSpecs.numShards

Type: integer

Conditional

Positive integer that specifies the number of shards to deploy for a sharded cluster.

If you use the spec.deploymentSpec.replicationSpecs parameter, you must set this parameter.

Atlas accepts 1 through 50, inclusive. The default value is 1.

• If you specify a value of 1 and you set spec.deploymentSpec.clusterType to SHARDED, Atlas deploys a single-shard sharded cluster.

• If you specify 1 and you set spec.deploymentSpec.clusterType to REPLICASET, Atlas deploys a replica set.

  Don't create a sharded cluster with a single shard for production environments. Single-shard sharded clusters don't provide the same benefits as multi-shard configurations.

  Tip

  • Sharding

  • Number of Nodes

Warning

When you use a sharded cluster, MongoDB requires that your applications connect to a mongos instance to ensure that your applications interact with the shards and other components of the sharded cluster properly. If you migrate from a replica set to a sharded cluster, your applications must restart to enable the connection to the cluster's mongos. As a result, the Atlas Admin API prevents you from migrating a replica set directly to a sharded cluster with more than one shard. After you successfully migrate your replica set to a single shard cluster and reset your application connections, you can add additional shards to the cluster.

spec.deploymentSpec.replicationSpecs.regionConfigs

Type: array

Required

Hardware specifications for nodes set for a given region. Each regionConfigs object describes the region's priority in elections and the number and type of MongoDB nodes that Atlas deploys to the region.

Each regionConfigs object must have either an analyticsSpecs object, electableSpecs object, or readOnlySpecs object.

• M0, M2, or M5 clusters require only electableSpecs.

• Dedicated clusters can specify any of these specifications, but must have at least one electableSpecs object within a replicationSpec.

• Every hardware specification must use the same instanceSize.

spec.deploymentSpec.replicationSpecs.regionConfigs.analyticsSpecs

Type: object

Optional

Hardware specifications for analytics nodes needed in the region. Analytics nodes handle analytic data such as reporting queries from BI Connector for Atlas. Analytics nodes are read-only and can never become the primary.

If you don't specify this parameter, Atlas deploys no analytics to this region.

spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.diskGB.enabled

Type: boolean

Optional

Flag that indicates whether this database deployment enables disk auto-scaling. This parameter defaults to true.

• Set to true to enable disk auto-scaling.

• Set to false to disable disk auto-scaling.

The maximum amount of RAM for the selected cluster tier and the oplog size can limit storage auto-scaling. To learn more, see Customize Your Storage.

spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.enabled

Type: boolean

Optional

Flag that indicates whether instance size auto-scaling is enabled. This parameter defaults to false.

• Set to true to enable instance size auto-caling. If enabled, you must specify a value for spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.maxInstanceSize.

• Set to false to disable instance size auto-scaling.

spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.maxInstanceSize

Type: string

Conditional

String that indicates the maximum instance size to which your database deployment can automatically scale (such as M40). You must specify this parameter if you set spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.enabled to true.

Note

If you set a maximum instance size smaller than the database deployment's current instance size with auto-scaling enabled, Atlas automatically scales the current instance size to the maximum value you specify.

For example, if the database deployment's current instance size is M40 and you set the maximum instance size to M30, Atlas automatically scales the current instance size to M30.

If Atlas changes the current instance size and you don't change the spec.deploymentSpec.replicationSpecs.regionConfigs.electableSpecs.instanceSize in Atlas Kubernetes Operator to match the new instance size, Atlas Kubernetes Operator displays a warning in the logs but doesn't prevent auto-scaling.

spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.minInstanceSize

Type: string

Conditional

String that indicates the minimum instance size to which your database deployment can automatically scale (such as M10). You must specify this parameter if you set spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.enabled to true.

Note

If you set a minimum instance size larger than the database deployment's current instance size with auto-scaling enabled, Atlas automatically scales the current instance size to the minimum value you specify.

For example, if the database deployment's current instance size is M10 and you set the minimum instance size to M30, Atlas automatically scales the current instance size to M30.

If Atlas changes the current instance size and you don't change the spec.deploymentSpec.replicationSpecs.regionConfigs.electableSpecs.instanceSize in Atlas Kubernetes Operator to match the new instance size, Atlas Kubernetes Operator displays a warning in the logs but doesn't prevent auto-scaling.

spec.deploymentSpec.replicationSpecs.regionConfigs.electableSpecs

Type: object

Optional

Hardware specifications for electable nodes in the region. Electable nodes can become the primary and can enable local reads.

If you don't specify this option, Atlas deploys no electable nodes to the region.

spec.deploymentSpec.replicationSpecs.regionConfigs.electableSpecs.instanceSize

Type: string

Conditional

Hardware specification for the instance sizes in this region. Each instance size has a default storage and memory capacity. The instance size you select applies to all the data-bearing hosts in your instance size. To learn more, see the AWS, GCP, and Azure custom storage sizes.

If you deploy a sharded cluster, or global cluster, you must choose an instance size of M30 or greater.

If you change the instance size name after you deploy your cluster, Atlas changes the database deployment to the instance size you specify unless it falls outside the range you specify in spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.minInstanceSize and spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.maxInstanceSize with auto-scaling enabled. To learn more, see spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.minInstanceSize and spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.maxInstanceSize.

Note

If you have auto-scaling enabled for the compute field, you can't edit this option. To learn more, see spec.deploymentSpec.replicationSpecs.regionConfigs.autoScaling.compute.enabled.

Note

You can change this setting to upgrade an M0 or Flex cluster to an M10+ cluster. However, you can't use this setting to upgrade an M0 or a Flex cluster to another free or Flex cluster

spec.deploymentSpec.replicationSpecs.regionConfigs.electableSpecs.nodeCount

Type: integer

Conditional

Number of electable nodes for Atlas to deploy to the region. Electable nodes can become the primary and can enable local reads.

The combined electableSpecs.nodeCount across all replicationSpecs.regionConfigs objects must total 3, 5, or 7.

You can't create electable nodes if spec.deploymentSpec.replicationSpecs.regionConfigs.priority is 0.

spec.deploymentSpec.replicationSpecs.regionConfigs.priority

Type: integer

Required

Precedence is given to this region when a primary election occurs.

If your regionConfigs has only readOnlySpecs, analyticsSpecs, or both, set this value to 0.

If you have multiple regionConfigs objects (your cluster is multi-region or multi-cloud), they must have priorities in descending order. The highest priority is 7.

Example

Set your highest priority region to 7, your second-highest priority to 6, and your third-priority region to 5. If you have no electable nodes, set this value to 0.

If your region has set electableSpecs.nodeCount to 1 or higher, it must have a priority of exactly one less than another region in the replicationSpecs.regionConfigs array unless it is the primary. The highest-priority region must have a priority of 7. The lowest possible priority is 1.

The priority 7 region identifies the Preferred Region of the cluster. Atlas places the primary node in the Preferred Region. Priorities 1 through 7 are exclusive: you can't assign a given priority to more than one region per cluster.

Example

If you have three regions, their priorities would be 7, 6, and 5 respectively. If you added two more regions for supporting electable nodes, the priorities of those regions would be 4 and 3 respectively.

spec.deploymentSpec.replicationSpecs.regionConfigs.providerName

Type: string

Conditional

Cloud service provider on which Atlas provisions the hosts.

AWS	Amazon AWS
GCP	Google Cloud Platform
AZURE	Microsoft Azure

spec.deploymentSpec.replicationSpecs.regionConfigs.regionName

Type: string

Conditional

Physical location of your MongoDB cluster. The region you choose can affect network latency for clients accessing your databases.

For a complete list of region name values, refer to the cloud provider reference pages:

• AWS

• GCP

• Azure

For multi-region clusters, see spec.deploymentSpec.replicationSpecs. You must set either spec.deploymentSpec.replicationSpecs.regionConfigs.regionName or spec.deploymentSpec.replicationSpecs.

spec.deploymentSpec.replicationSpecs.regionConfigs.readOnlySpecs

Type: object

Optional

Hardware specifications for read-only nodes in the region. Read-only nodes can never become the primary member, but can enable local reads.

If you don't specify this parameter, Atlas deploys no read-only nodes to the region.

spec.deploymentSpec.replicationSpecs.zoneName

Type: string

Optional

Human-readable label that identifies the zone in a Global Cluster. Provide this value only if you set spec.deploymentSpec.clusterType to GEOSHARDED.

spec.deploymentSpec.searchIndexes

Type: array

Optional

An array of SearchIndex objects with fields that describe the search index. Each SearchIndex object contains the following fields:

Field	Type	Description
name	string	Human-readable label that identifies this index. Must be unique for a deployment.
DBName	string	Human-readable label that identifies the existing database that contains the collection with one or more Atlas Search indexes. IMPORTANT: The database that you specify must already exist. If you don't have an existing database, create one.
collectionName	string	Human-readable label that identifies the collection that contains one or more Atlas Search indexes.
type	string	Type of the index. Atlas accepts the following values: search vectorSearch
search	object	You must include this object if type is search. Otherwise, omit it.
vectorSearch	object	You must include this object if type is vectorSearch. Otherwise, omit it.

spec.deploymentSpec.searchIndexes.search

Type: object

Optional

Field	Type	Description
synonyms	array	Rule sets that map words to their synonyms in this index
mappings	object	Index specifications for the collection's fields Required
searchConfigurationRef	object	A name/namespace reference to the AtlasSearchIndexConfig custom resource, described below. Required

spec.deploymentSpec.searchIndexes.search.synonyms

Type: array

Optional

An array of Synonym objects with fields that describe rule sets that map words to their synonyms in this index. Each Synonym object contains the following fields:

Field	Type	Description
name	string	Human-readable label that identifies the synonym definition. Each name must be unique within the same index definition Required
analyzer	string	Specific pre-defined method chosen to apply to the synonyms to be searched. Possible values are: lucene.standard lucene.standard lucene.simple lucene.whitespace lucene.keyword lucene.arabic lucene.armenian lucene.basque lucene.bengali lucene.brazilian lucene.bulgarian lucene.catalan lucene.chinese lucene.cjk lucene.czech lucene.danish lucene.dutch lucene.english lucene.finnish lucene.french lucene.galician lucene.german lucene.greek lucene.hindi lucene.hungarian lucene.indonesian lucene.irish lucene.italian lucene.japanese lucene.korean lucene.kuromoji lucene.latvian lucene.lithuanian lucene.morfologik lucene.nori lucene.norwegian lucene.persian lucene.portuguese lucene.romanian lucene.russian lucene.smartcn lucene.sorani lucene.spanish lucene.swedish lucene.thai lucene.turkish lucene.ukrainian Required
source	object	Data set that stores the mapping one or more words map to one or more synonyms of those words Required

spec.deploymentSpec.searchIndexes.search.synonyms.source

Type: object

Required

Field	Type	Description
collection	string	Human-readable label that identifies the MongoDB collection that stores words and their applicable synonyms Required

spec.deploymentSpec.searchIndexes.search.mappings

Type: object

Required

An object with Index specifications for the collection's fields:

dynamic	boolean	Flag that indicates whether the index uses dynamic or static mappings. Required if mappings.fields is omitted.
fields	JSON/YAML	One or more field specifications for the Atlas Search index. Required if mappings.dynamic is omitted or set to false.

spec.deploymentSpec.searchIndexes.vectorSearch

Type: object

Optional

Field	Type	Description
fields	JSON/YAML	Array of JSON objects. See examples https://dochub.mongodb.org/core/avs-vector-type Required

spec.deploymentSpec.searchNodes

Type: array

Optional

An array of search nodes configurations. Each element contains two fields:

Field	Type	Description
nodeCount	integer	Number of search nodes in the cluster. Atlas accepts values 2 through 32, inclusive. The default number is 2.
instanceSize	string	Hardware specification for the search node instance sizes. Atlas accepts one of the following: S20_HIGHCPU_NVME S30_HIGHCPU_NVME S40_HIGHCPU_NVME S50_HIGHCPU_NVME S60_HIGHCPU_NVME S70_HIGHCPU_NVME S80_HIGHCPU_NVME S30_LOWCPU_NVME S40_LOWCPU_NVME S50_LOWCPU_NVME S60_LOWCPU_NVME S80_LOWCPU_NVME S90_LOWCPU_NVME S100_LOWCPU_NVME The default instance size is S20_HIGHCPU_NVME.

spec.deploymentSpec.tags

Type: array

Optional

List that contains tags (key-value pairs) to better understand, organize, and identify your database deployments. To learn more, see Tags on Clusters.

spec.deploymentSpec.terminationProtectionEnabled

Type: boolean

Indicates whether termination protection is enabled or disabled for your cluster. If set to true, Atlas won't delete the cluster. If set to false, Atlas will delete the cluster. The default is false.

spec.deploymentSpec.versionReleaseSystem

Type: string

Conditional

Release cadence that Atlas uses for this cluster. Atlas accepts:

• CONTINUOUS: Atlas creates your cluster using the most recent MongoDB release. Atlas automatically updates your cluster to the latest major and rapid MongoDB releases as they become available.

• LTS: Atlas creates your cluster using the latest patch release of the MongoDB version that you specify in the spec.deploymentSpec.mongoDBMajorVersion parameter. Atlas automatically updates your cluster to subsequent patch releases of this MongoDB version. Atlas doesn't update your cluster to newer rapid or major MongoDB releases as they become available.

  If omitted, defaults to LTS.

  If you set this parameter to CONTINUOUS, you must omit the spec.deploymentSpec.mongoDBMajorVersion parameter.

spec.externalProjectRef.id

Type: string

Conditional

ID of the project to which the deployment belongs. You must specify the project ID of an existing Atlas Project. This parameter is required for deployments who belong to projects managed by either:

• A different instance of Atlas Kubernetes Operator

• Tooling other than Atlas Kubernetes Operator

For deployments who belong to projects managed by the same instance of Atlas Kubernetes Operator, use spec.projectRef.name if you do not use spec.externalProjectRef.id.

spec.flexSpec

Type: array

Conditional

Note

See Notes on Transition To Flex Clusters for full information on changes.

List that contains the Flex cluster parameters from the API. For a full list of available parameters, see the Atlas Flex Clusters API.

Important

You must specify spec.deploymentSpec or spec.flexSpec in your configuration.

spec.flexSpec.name

Type: string

String that identifies the name of the Flex cluster.

spec.flexSpec.tags

Type: array

Optional

List that contains tags (key-value pairs) to better understand, organize, and identify your database deployments. To learn more, see Tags on Clusters.

spec.flexSpec.terminationProtectionEnabled

Type: boolean

Indicates whether termination protection is enabled or disabled for your Flex cluster. If set to true, Atlas won't delete the cluster. If set to false, Atlas will delete the cluster. The default is false.

spec.flexSpec.providerSettings.backingProviderName

Type: string

The name of the cloud provider for your Flex cluster. providerSettings include the configuration that specifies the settings for the provisioned hosts on which MongoDB runs.

Atlas accepts one of the following values:

• AWS

• AZURE

• GCP

spec.flexSpec.providerSettings.regionName

Type: string

Physical location of your MongoDB Flex cluster. The region you choose can affect network latency for clients accessing your databases.

For a complete list of region name values, refer to the cloud provider reference pages:

• AWS

• GCP

• Azure

spec.processArgs

Type: object

Optional

Object that contains the additional configuration options for your cluster.

spec.processArgs.defaultReadConcern

Type: string

Optional

String that indicates the default level of acknowledgment requested from MongoDB for read operations set for this cluster.

MongoDB 5.0 clusters default to local.

spec.processArgs.defaultWriteConcern

Type: string

Optional

String that indicates the default level of acknowledgment requested from MongoDB for write operations set for this cluster.

MongoDB versions 5.0 and later clusters default to majority.

spec.processArgs.failIndexKeyTooLong

Type: boolean

Optional

Flag that indicates whether to fail the operation and return an error when you insert or update documents where all indexed entries exceed 1024 bytes. If you set this to false, mongod writes documents that exceed this limit, but doesn't index them.

This option corresponds to the param.failIndexKeyTooLong mongod parameter.

spec.processArgs.javascriptEnabled

Type: boolean

Optional

Flag that indicates whether the cluster allows execution of operations that perform server-side executions of JavaScript.

• This option corresponds to modifying the security.javascriptEnabled configuration file option for each mongod and mongos in the cluster.

spec.processArgs.minimumEnabledTlsProtocol

Type: integer

Optional

String that indicates the minimum TLS version that the cluster accepts for incoming connections. Clusters using TLS 1.0 or 1.1 should consider setting TLS 1.2 as the minimum TLS protocol version.

To learn more, see What versions of TLS does Atlas support?.

This option corresponds to the net.ssl.disabledProtocols mongod configuration file option.

spec.processArgs.noTableScan

Type: boolean

Optional

Flag that indicates whether the cluster disables executing any query that requires a collection scan to return results.

This option corresponds to the notablescan mongod parameter.

spec.processArgs.oplogSizeMB

Type: integer

Optional

Number that indicates the storage limit of a cluster's oplog expressed in megabytes. A value of null indicates that the cluster uses the default oplog size that Atlas calculates.

This option corresponds to the replication.oplogSizeMB mongod configuration file option.

spec.processArgs.sampleRefreshIntervalBIConnector

Type: integer

Optional

Number that indicates the documents per database to sample when gathering schema information.

This parameter corresponds to the sampleSize mongosqld option.

spec.processArgs.sampleSizeBIConnector

Type: integer

Optional

Number that indicates the interval in seconds at which the mongosqld process re-samples data to create its relational schema.

This parameter corresponds to the sampleRefreshIntervalSecs mongosqld option.

spec.projectRef.name

Type: string

Conditional

Name of the project to which the deployment belongs. You must specify an existing AtlasProject Custom Resource. This parameter applies only to deployments that belong to projects managed by the same instance Atlas Kubernetes Operator.

For deployments that belong to projects managed by either:

• a different instance of Atlas Kubernetes Operator

• tooling other than Atlas Kubernetes Operator

use spec.externalProjectRef.id.

spec.serverlessSpec

Type: array

Conditional

Note

See Notes on Transition To Flex Clusters for full information on changes.

List that contains the Serverless instance parameters from the API. For a full list of available parameters, see the Atlas Flex Clusters API.

Important

You must specify spec.deploymentSpec or spec.flexSpec in your configuration.

spec.upgradeToDedicated

Type: boolean

Optional

Flag that, when set to true, triggers an in-place upgrade from a Flex cluster to a Dedicated cluster.

If omitted, it defaults to false. For a full walkthrough of the migration process, see Migrate a Flex cluster to a Dedicated cluster.

Important

You must also provide the full configuration for the target dedicated cluster in the spec.deploymentSpec block. This operation is one-way and irreversible.

spec.serverlessSpec.privateEndpoints

Type: array

Optional

Note

Atlas deprecated M2 and M5 clusters and Serverless instances. In the near future, Atlas will automatically migrate all M2 and M5 clusters to Flex clusters. For Serverless instances, Atlas will determine whether to migrate instances to Free clusters, Flex clusters, or Dedicated clusters according to your usage, then migrate your Serverless instances automatically.

To preserve backwards compatibility of the APIs for a period of time, Atlas will continue to allow for these migrated clusters to be managed through the same APIs (old and new APIs), including when using Atlas Kubernetes Operator. The backwards compatibility of APIs will remain in place until January 2026, when the old APIs will be removed and only APIs related to Flex clusters will remain in place.

Support for private endpoints on Serverless instances will end in March 2025. You must update your Atlas Kubernetes Operator configurations to remove private endpoints by March 2025. You must remove all remaining M2, M5, and Serverless instance features from your Atlas Kubernetes Operator configurations before January 2026.

If your workloads require Private Endpoints or Continuous Backup, switch to Atlas Dedicated Clusters. To learn more, see Migration to Flex Clusters and the Atlas Flex Migration Guide.

Deprecated. Remove this parameter if it exists. List that contains the private endpoint configurations for the Serverless instance.

spec.serverlessSpec.providerSettings

Type: Object

Conditional

Note

See Notes on Transition To Flex Clusters for full information on changes.

Configuration that specifies the settings for the provisioned hosts on which MongoDB runs. The available options are specific to the cloud service provider. To learn more, see the AWS, GCP, and Azure Serverless instance configuration options.

If you want to create or update a Serverless instance, you must specify this setting.

Important

The following settings are deprecated and will be removed in a future release:

• spec.serverlessSpec.providerSettings.DiskIOPS

• spec.serverlessSpec.providerSettings.DiskTypeName

• spec.serverlessSpec.providerSettings.EncryptEBSVolume

• spec.serverlessSpec.providerSettings.InstanceSizeName

• spec.serverlessSpec.providerSettings.VolumeType

• spec.serverlessSpec.providerSettings.AutoScaling

Providing values for any of these settings has no effect.

spec.serverlessSpec.providerSettings.providerName

Type: string

Conditional

Note

See Notes on Transition To Flex Clusters for full information on changes.

Cloud service provider on which Atlas provisions the host for a Serverless instance.

Atlas accepts the following values:

AWS	Amazon AWS
GCP	Google Cloud Platform
AZURE	Microsoft Azure

spec.serverlessSpec.providerSettings.regionName

Type: string

Conditional

Note

See Notes on Transition To Flex Clusters for full information on changes.

Physical location of your MongoDB Serverless instance. The region you choose can affect network latency for clients accessing your databases.

For a complete list of region name values, refer to the cloud provider reference pages:

• AWS

• GCP

• Azure

spec.serverlessSpec.tags

Note

See Notes on Transition To Flex Clusters for full information on changes.

Type: array

Optional

List that contains tags (key-value pairs) to better understand, organize, and identify your database deployments. To learn more, see Tags on Clusters.

status.connectionStrings

Type: array

Required

List that contains the connection URLs for accessing the cluster. This parameter appears after you create or update a cluster.

Note

.. include:: /includes/fact-ak8so-connection-strings.rst

For the configuration parameters available for a cluster from the API, see the Atlas Clusters API.