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Modify a Cluster

On this page

  • Considerations
  • Request
  • Request Path Parameters
  • Request Query Parameters
  • Request Body Parameters
  • Response
  • Example Request
  • Example Response
  • Response Header
  • Response Body
Note

Groups and projects are synonymous terms. Your {GROUP-ID} is the same as your project ID. For existing groups, your group/project ID remains the same. The resource and corresponding endpoints use the term groups.

Note
Feature unavailable in Free and Shared-Tier Clusters

This feature is not available for M0 free clusters, M2, and M5 clusters. To learn more about which features are unavailable, see Atlas M0 (Free Cluster), M2, and M5 Limitations.

The Atlas Administration API authenticates using HTTP Digest Authentication. Provide a programmatic API public key and corresponding private key as the username and password when constructing the HTTP request. To learn how to configure API access for an Atlas project, see Get Started with the Atlas Administration API.

Clusters can span regions and cloud service providers. The total number of nodes in clusters spanning across regions has a specific constraint on a per-project basis.

Atlas limits the total number of nodes in other regions in one project to a total of 40. This total excludes:

  • Google Cloud regions communicating with each other
  • Free clusters or shared clusters

The total number of nodes between any two regions must meet this constraint.

Example

If an Atlas project has nodes in clusters spread across three regions:

  • 30 nodes in Region A
  • 10 nodes in Region B
  • 5 nodes in Region C

You can only add 5 more nodes to Region C because:

  1. If you exclude Region C, Region A + Region B = 40.
  2. If you exclude Region B, Region A + Region C = 35, <= 40.
  3. If you exclude Region A, Region B + Region C = 15, <= 40.
  4. Each combination of regions with the added 5 nodes still meets the per-project constraint:

    • Region A + B = 40
    • Region A + C = 40
    • Region B + C = 20

You can't create a multi-region cluster in a project if it has one or more clusters spanning 40 or more nodes in other regions.

Contact Atlas support for questions or assistance with raising this limit.

Base URL: https://cloud.mongodb.com/api/atlas/v1.0

PATCH /groups/{GROUP-ID}/clusters/{CLUSTER-NAME}
Path Parameter
Type
Necessity
Description
GROUP-ID
string
Required
Unique identifier for the project containing the cluster.
CLUSTER-NAME
string
Required
Name of the cluster to modify.

This endpoint might use any of the HTTP request query parameters available to all Atlas Administration API resources. All of these are optional.

Name
Type
Necessity
Description
Default
pretty
boolean
Optional
Flag indicating whether the response body should be in a prettyprint format.
false
envelope
boolean
Optional

Flag indicating if Atlas should wrap the response in a JSON envelope.

This option may be needed for some API clients. These clients cannot access the HTTP response headers or status code. To remediate this, set envelope=true in the query.

For endpoints that return one result, the response body includes:

status
HTTP response code
envelope
Expected response body
false
Important

If modifying any of the providerSettings or replicationSpec values, you must specify the providerSettings.providerName. For M2 and M5 clusters, you must also specify the providerSettings.backingProviderName.

You can't modify a paused cluster other than to resume the cluster. Nor can you pause a cluster with pending changes.

You do not need to provide all parameters when modifying a cluster, only the parameters you want to change and any parameters required to make that change.

Body Parameter
Type
Necessity
Description
autoScaling
object
Optional

Collection of settings that configures auto-scaling information for the cluster.

If you specify the autoScaling object, you must also specify the providerSettings.autoScaling object.

Tip
autoScaling.compute
object
Optional

Specifies whether the cluster automatically scales its cluster tier and whether the cluster can scale down.

Important

Cluster tier auto-scaling is not available for clusters using NVME storage classes.

autoScaling.compute.enabled
boolean
Optional

Flag that indicates whether cluster tier auto-scaling is enabled. The default is false.

  • Set to true to enable cluster tier auto-scaling. If enabled, you must specify a value for providerSettings.autoScaling.compute.maxInstanceSize.
  • Set to false to disable cluster tier auto-scaling.
Note

If you disable auto-scaling for your cluster, Atlas sets your minimum and maximum autoscaling bounds to null. If you re-enable autoscaling at a later time, you must set new values for providerSettings.autoScaling.compute.minInstanceSize and providerSettings.autoScaling.compute.maxInstanceSize.

autoScaling.compute.scaleDownEnabled
boolean
Conditional

Flag that indicates whether the cluster tier may scale down. Atlas requires this parameter if "autoScaling.compute.enabled" : true.

If you enable this option, specify a value for providerSettings.autoScaling.compute.minInstanceSize.

Note

To configure this value, you must set autoScaling.compute.enabled to true. In previous versions of Atlas, you could configure this value when autoScaling.compute.enabled was false.

autoScaling.diskGBEnabled
boolean
Optional

Flag that indicates whether disk auto-scaling is enabled. The default is 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.

backupEnabled
boolean
Optional

Flag that indicates whether legacy backups have been enabled.

Set to false to disable legacy backups for the cluster. Atlas deletes any stored snapshots. See the legacy backup Snapshot Schedule for more information.

You cannot enable legacy backups if you have an existing cluster in the project with Cloud Backups enabled.

The default value is false.

Note

This option is not supported on clusters running MongoDB 4.2. Clusters running MongoDB 4.2 must use Cloud Backups.

Important

Clusters running MongoDB FCV 4.2 or later and any new Atlas clusters of any type do not support this parameter. These clusters must use Cloud Backups: providerBackupEnabled

If you create a new Atlas cluster and set "backupEnabled" : true, the API responds with an error.

This change doesn't affect existing clusters that use legacy backups.

biConnector
object
Optional

Configuration of BI Connector for Atlas on this cluster.

The MongoDB Connector for Business Intelligence for Atlas (BI Connector) is only available for M10 and larger clusters.

The BI Connector is a powerful tool which provides users SQL-based access to their MongoDB databases. As a result, the BI Connector performs operations which may be CPU and memory intensive. Given the limited hardware resources on M10 and M20 cluster tiers, you may experience performance degradation of the cluster when enabling the BI Connector. If this occurs, upgrade to an M30 or larger cluster or disable the BI Connector.

biConnector.enabled
boolean
Optional

Flag that indicates whether or not BI Connector for Atlas is enabled on the cluster.

  • Set to true to enable BI Connector for Atlas.
  • Set to false to disable BI Connector for Atlas.
biConnector.readPreference
string
Optional

Source from which the BI Connector for Atlas reads data. Each BI Connector for Atlas read preference contains a distinct combination of readPreference and readPreferenceTags options.

Value
Description
primary
BI Connector for Atlas reads data from the primary.
secondary
BI Connector for Atlas reads data from a secondary. The preference defaults to this value if there are no analytics nodes in the cluster.
analytics
BI Connector for Atlas reads data from an analytics node. Default if the cluster contains analytics nodes.
Note

To set the readPreference value to "analytics", the cluster must have at least one analytics node.

If the readPreference value is "analytics", you cannot remove all analytics nodes from the cluster.

clusterType
string
Conditional

Type of the cluster that you want to modify.

You cannot convert a sharded cluster deployment to a replica set deployment.

Note
When should you use clusterType?
Condition
Necessity
You set 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
SHARDED
GEOSHARDED
diskSizeGB
number
Conditional

Capacity, in gigabytes, of the host's root volume. Increase this number to add capacity, up to a maximum possible value of 4096 (4 TB). This value must be a positive integer.

Note
When should you use diskSizeGB?

This setting:

The minimum disk size for dedicated clusters is 10 GB for AWS and Google Cloud, and 32 GB for Azure. If you specify diskSizeGB with a lower disk size, Atlas defaults to the minimum disk size value.

Each cluster tier has its own default value. If you set a value below the cluster default, Atlas replaces it with the default value. To view default values: open the Atlas web interface; click the button to add a new cluster; view the available default sizes; close the window without saving changes.

Important

Atlas calculates storage charges differently depending on whether you choose the default value or a custom value. For details, see Storage Capacity.

The maximum value for disk storage cannot exceed 50 times the maximum RAM for the selected cluster. If you require additional storage space beyond this limitation, consider upgrading your cluster to a higher tier.

Note

When you increase the storage capacity of a cluster, Atlas increases the cluster's oplog size. Atlas scales the oplog to 5% of the cluster capacity, not to exceed 50 GB. NVMe storage requires an oplog which is 10% of the storage capacity. Atlas doesn't change the oplog size if it exceeds 5% of the new storage capacity (10% in the case of NVMe storage).

As cluster storage capacity decreases, Atlas doesn't change the oplog size unless it exceeds a certain maximum determined according to MongoDB best practices.

encryptionAtRestProvider
string
Optional

Cloud service provider that offers Encryption at Rest.

labels
array of objects
Optional

Collection of key-value pairs that tag and categorize the cluster.

Each key and value has a maximum length of 255 characters.

"labels": [
{
"key": "example key",
"value": "example value"
}
]
Note

The Atlas console doesn't display your labels. Atlas returns them in the response body when you use the Atlas Administration API to

mongoDBMajorVersion
string
Optional

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

  • 4.0
  • 4.2
  • 4.4
  • 5.0

You must deploy MongoDB 4.4 if "providerSettings.instanceSizeName" : "M2" or "M5".

Atlas always deploys the cluster with the latest stable release of the specified version. You can upgrade to a newer version of MongoDB when you modify a cluster

Note

If you are upgrading from version 4.0 to 4.2 and you have legacy backups enabled, you must set backupEnabled to false and set providerBackupEnabled to true as part of the API request. Continuous backups are no longer supported in MongoDB version 4.2. Instead, use Cloud Backups.

If mongoDBMajorVersion is set to CONTINUOUS, you must omit the mongoDBMajorVersion field. You can't modify the MongoDB version that you clusters run when you choose the continuous release cadence.

name
string
Optional
Name of the cluster as it appears in Atlas. After Atlas creates the cluster, you can't change its name.
numShards
number
Conditional

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

Important

If you use the replicationSpecs parameter, you must set numShards.

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

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

For more information on sharded clusters, see Sharding in the MongoDB manual.

For details on how this setting affects costs, see Number of Nodes.

Note

Do not include in the request body for Global Clusters.

paused
boolean
Optional

Indicates whether the cluster is paused or not. The default value is false.

You cannot create a paused cluster. Either omit the parameter or explicitly set to false.

pitEnabled
boolean
Optional
Indicates if the cluster uses continuous cloud backups. If set to true, providerBackupEnabled must also be set to true.
providerBackupEnabled
boolean
Conditional

Set true or false to enable or disable Cloud Backups for cluster backups. If providerBackupEnabled and backupEnabled are false, the cluster does not use Atlas backups.

If you disable legacy backups for the cluster, Atlas deletes all stored snapshots. See the legacy backup Snapshot Schedule for more information.

You cannot enable Cloud Backups if you have an existing cluster in the project with Legacy Backups enabled.

Important

You must set this value to true for NVMe clusters.

providerSettings
object
Optional
Configuration for the provisioned servers on which MongoDB runs. The available options are specific to the cloud service provider.
providerSettings.autoScaling
object
Conditional

Contains the minInstanceSize and maxInstanceSize parameters which specify the range of instance sizes to which your cluster can scale. Atlas requires this parameter if "autoScaling.compute.enabled" : true.

Important

To configure this value, you must set autoScaling.compute.enabled to true. In previous versions of Atlas, you could configure this value when autoScaling.compute.enabled was false.

providerSettings.autoScaling.compute
object
Conditional
Range of instance sizes to which your cluster can scale. Atlas requires this parameter if "autoScaling.compute.enabled" : true.
providerSettings.autoScaling.compute.minInstanceSize
string
Conditional
Minimum instance size to which your cluster can automatically scale (such as M10). Atlas requires this parameter if "autoScaling.compute.scaleDownEnabled" : true.
providerSettings.autoScaling.compute.maxInstanceSize
string
Conditional
Maximum instance size to which your cluster can automatically scale (such as M40). Atlas requires this parameter if "autoScaling.compute.enabled" : true.
providerSettings.backingProviderName
string
Conditional

Cloud service provider on which the server for a multi-tenant cluster is provisioned.

This setting only works when "providerSetting.providerName" : "TENANT" and "providerSetting.instanceSizeName" : M2 or M5.

Atlas accepts the following values:

AWS
Amazon AWS
GCP
Google Cloud Platform
AZURE
Microsoft Azure
providerSettings.diskIOPS
number
Conditional

Disk IOPS setting for AWS storage. Set only if you selected AWS as your cloud service provider.

Maximum input/output operations per second (IOPS) the cluster can perform. The possible values depend on the selected providerSettings.instanceSizeName and diskSizeGB.

This setting requires that providerSettings.instanceSizeName to be M30 or greater and cannot be used with clusters with local NVMe SSDs.

To view the possible range of IOPS values for the selected instance size and storage capacity:

  1. Open the Atlas web console.
  2. Select Build a New Cluster.
  3. Under Cloud Provider & Region, select AWS.
  4. Under Cloud Provider & Region, select the region corresponding to your configured providerSettings.regionName.
  5. Under Cluster Tier, select the cluster tier corresponding to your configured providerSettings.instanceSizeName.
  6. Under Cluster Tier, set the Storage Capacity slider to your configured diskSizeGB. Alternatively, input the exact value of diskSizeGB in the input box to the right of the slider.

Click Provision IOPS to see the available IOPS range.

If you set the diskIOPS value to a value higher than the default value for the selected volume size, Atlas automatically sets providerSettings.volumeType to PROVISIONED. If you manually set diskIOPS to the default value, you must specify providerSettings.volumeType to be either PROVISIONED or STANDARD.

The default value for providerSettings.diskIOPS is the same as the cluster tier's Standard IOPS value, as viewable in the Atlas console.

Changing this value affects the cost of running the cluster as described in the billing documentation.

Atlas enforces the following minimum ratios for given cluster tiers. This keeps cluster performance consistent with large datasets.

Instance sizes M10 to M40 have a ratio of disk capacity to system memory of 60:1. Instance sizes greater than M40 have a ratio of 120:1.

Example

To support 3 TB (or 3,072 GB) of disk capacity, select a cluster tier with a minimum of 32 GB of RAM. This would be M50 or greater.

providerSettings.diskTypeName
string
Conditional

Type of disk if you selected Azure as your cloud service provider.

Disk type of the server's root volume for Azure instances. If omitted, Atlas uses the default disk type for the selected providerSettings.instanceSizeName.

The following table lists the possible values for this field, and their corresponding storage size.

diskTypeName
Storage Size
P2 1
8GB
P3 2
16GB
P4 3
32GB
P6 4
64GB
P10
128GB
P15
256GB
P20
512GB
P30
1024GB
P40
2048GB
P50
4095GB

1 Default for M10 Azure clusters

2 Default for M20 Azure clusters

3 Default for M30 Azure clusters

4 Default for M40+ Azure clusters

providerSettings.encryptEBSVolume
boolean
Conditional

Flag that indicates whether the Amazon EBS encryption feature encrypts the host's root volume for both data at rest within the volume and for data moving between the volume and the cluster.

Note

This setting is always enabled for clusters with local NVMe SSDs.

The default value is true.

providerSettings.instanceSizeName
string
Required

Atlas provides different cluster tiers, each with a default storage capacity and RAM size. The cluster you select is used for all the data-bearing servers in your cluster.

Tip
See also:

M2 and M5 clusters are multi-tenant deployments. You must set providerSettings.providerName to TENANT and specify the cloud service provider in providerSettings.backingProviderName.

providerSettings.providerName
string
Conditional

Cloud service provider on which Atlas provisions the hosts.

AWS
Amazon AWS
GCP
Google Cloud Platform
AZURE
Microsoft Azure
TENANT

M2 or M5 multi-tenant cluster

Use providerSettings.backingProviderName to set the cloud service provider.

M2 and M5 clusters are multi-tenant deployments. You must set providerSettings.providerName to TENANT and specify the cloud service provider in providerSettings.backingProviderName.

providerSettings.regionName
string
Conditional
Note
Required if setting replicationSpecs array to empty

This parameter is required if you have not set any values in the replicationSpecs array.

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

Do not specify this parameter when creating a multi-region cluster using the replicationSpec document.

When Atlas deploys a dedicated cluster, Atlas checks if a VPC or VPC connection exists for that provider and region. If not, Atlas creates them as part of the deployment. Atlas assigns the VPC a CIDR block.

To limit a new VPC peering connection to one CIDR block and region, create the connection first. Deploy the cluster after the connection starts.

Google Cloud Clusters
Google Cloud Atlas clusters use a default CIDR block of /18. If your application requires a smaller block, create a network peering container first. Atlas limits the clusters you create to the regions in this new container you created.
Multi-Region Clusters
Multi-region clusters require one VPC peering connection for each region. MongoDB nodes can use only the peering connection that resides in the same region as the nodes to communicate with the peered VPC.

To learn more, see Set up a Network Peering Connection.

Select your cloud provider's tab for example cluster region names:

providerSettings.volumeType
string
Conditional

Disk IOPS setting for AWS storage. Set only if you selected AWS as your cloud service provider.

The API resource accepts STANDARD, the default, and PROVISIONED.

  • STANDARD volume types can't exceed the default IOPS rate for the selected volume size.
  • PROVISIONED volume types must fall within the allowable IOPS range for the selected volume size.
replicationFactor
number
Optional
Important
Use replicationSpecs

replicationFactor is deprecated. Use replicationSpecs.

Number of replica set members. Each member keeps a copy of your databases, providing high availability and data redundancy. Atlas accepts 3, 5, or 7. The default value is 3.

Don't specify this parameter when creating a multi-region cluster using the replicationSpec object.

If your cluster is a sharded cluster, each shard is a replica set with the specified replication factor.

Atlas ignores this value if you pass the replicationSpec object.

replicationSpec
object
Optional

Deprecated: replicationSpec is deprecated. Use replicationSpecs.

Configuration of each region in a multi-region cluster. Each element in this object represents a region where Atlas deploys your cluster.

For single-region clusters, you can either specify the providerSettings.regionName and replicationFactor, or you can use the replicationSpec object to define a single region.

For multi-region clusters, omit the providerSettings.regionName parameter.

For Global Clusters, specify the replicationSpecs parameter rather than a replicationSpec parameter.

Important

If you use replicationSpec, you must specify a minimum of one replicationSpec.<region> object.

Use the replicationSpecs parameter to modify a Global Cluster.

Note

You cannot specify both the replicationSpec and replicationSpecs parameters in the same request body.

replicationSpec.<region>
object
Conditional
Important
Use replicationSpecs[n].<region>

replicationSpec.<region> is deprecated. Use replicationSpecs[n].<region>.

Physical location of the region. Replace <region> with the name of the region. Each <region> object describes the region's priority in elections and the number and type of MongoDB nodes Atlas deploys to the region.

Important

If you use replicationSpec, you must specify a minimum of one replicationSpec.<region> object.

Select your cloud service provider's tab for example cluster region names:

For each <region> object, you must specify the analyticsNodes, electableNodes, priority, and readOnlyNodes parameters.

Tip
See also:

When Atlas deploys a dedicated cluster, Atlas checks if a VPC or VPC connection exists for that provider and region. If not, Atlas creates them as part of the deployment. Atlas assigns the VPC a CIDR block.

To limit a new VPC peering connection to one CIDR block and region, create the connection first. Deploy the cluster after the connection starts.

Google Cloud Clusters
Google Cloud Atlas clusters use a default CIDR block of /18. If your application requires a smaller block, create a network peering container first. Atlas limits the clusters you create to the regions in this new container you created.
Multi-Region Clusters
Multi-region clusters require one VPC peering connection for each region. MongoDB nodes can use only the peering connection that resides in the same region as the nodes to communicate with the peered VPC.

To learn more, see Set up a Network Peering Connection.

replicationSpec.<region>.analyticsNodes
number
Optional
Important
Use replicationSpecs[n].<region>.analyticsNodes

replicationSpec.<region>.analyticsNodes is deprecated. Use replicationSpecs[n].<region>.analyticsNodes.

Number of analytics nodes for Atlas to deploy to the region. Analytics nodes are useful for handling analytic data such as reporting queries from BI Connector for Atlas. Analytics nodes are read-only, and can never become the primary.

replicationSpec.<region>.electableNodes
number
Optional
Important
Use replicationSpecs[n].<region>.electableNodes

replicationSpec.<region>.electableNodes is deprecated. Use replicationSpecs[n].<region>.electableNodes.

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

The total number of electableNodes across all replicationSpec.<region> object must be 3, 5, or 7.

Specify 0 if you do not want any electable nodes in the region.

You cannot create electable nodes if the replicationSpec.<region>.priority is 0.

replicationSpec.<region>.priority
number
Optional
Important
Use replicationSpecs[n].<region>.priority

replicationSpec.<region>.priority is deprecated. Use replicationSpecs[n].<region>.priority.

Election priority of the region. For regions with only replicationSpec.<region>.readOnlyNodes, set this value to 0.

For regions where replicationSpec.<region>.electableNodes is at least 1, each replicationSpec.<region> must have a priority of exactly one (1) less than the previous region. The first 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.

replicationSpec.<region>.readOnlyNodes
number
Optional
Important
Use replicationSpecs[n].<region>.readOnlyNodes

replicationSpec.<region>.readOnlyNodes is deprecated. Use replicationSpecs[n].<region>.readOnlyNodes.

Number of read-only nodes for Atlas to deploy to the region. Read-only nodes can never become the primary, but can facilitate local-reads.

Specify 0 if you do not want any read-only nodes in the region.

replicationSpecs
array of objects
Conditional

Configuration for cluster regions.

Note
When should you use replicationSpecs?
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.

You must specify all parameters in replicationSpecs object array.

Tip
What parameters depend on replicationSpecs?

If you set replicationSpecs, you must:

  • Set clusterType
  • Set numShards
  • Not set replicationSpec
  • Not use clusters with local NVMe SSDs
  • Not use Azure clusters
replicationSpecs[n].id
string
Conditional

Unique identifier of the replication object for a zone in a Global Cluster. Must be exactly 24 hexadecimal digits in length.

Condition
Necessity
Existing zones included in a cluster modification request body.
Required
Adding a new zone to an existing Global Cluster.
Optional
Warning

Atlas deletes any existing zones in a Global Cluster that are not included in a cluster modification request.

replicationSpecs[n].numShards
number
Required
Number of shards to deploy in each specified zone. The default value is 1.
replicationSpecs[n].regionsConfig
object
Optional

Configuration for a region. Each regionsConfig object describes the region's priority in elections and the number and type of MongoDB nodes that Atlas deploys to the region.

Important

If you use replicationSpecs, you must specify a minimum of one replicationSpecs[n].regionsConfig.<region> string.

replicationSpecs[n].regionsConfig.<region>
object
Required

Physical location of the region. Replace <region> with the name of the region. Each <region> object describes the region's priority in elections and the number and type of MongoDB nodes Atlas deploys to the region.

Select your cloud service provider's tab for example cluster region names:

For each <region> object, you must specify the analyticsNodes, electableNodes, priority, and readOnlyNodes parameters.

Tip
See also:

When Atlas deploys a dedicated cluster, Atlas checks if a VPC or VPC connection exists for that provider and region. If not, Atlas creates them as part of the deployment. Atlas assigns the VPC a CIDR block.

To limit a new VPC peering connection to one CIDR block and region, create the connection first. Deploy the cluster after the connection starts.

Google Cloud Clusters
Google Cloud Atlas clusters use a default CIDR block of /18. If your application requires a smaller block, create a network peering container first. Atlas limits the clusters you create to the regions in this new container you created.
Multi-Region Clusters
Multi-region clusters require one VPC peering connection for each region. MongoDB nodes can use only the peering connection that resides in the same region as the nodes to communicate with the peered VPC.

To learn more, see Set up a Network Peering Connection.

replicationSpecs[n].regionsConfig.<region>.analyticsNodes
number
Optional

Number of analytics nodes for Atlas to deploy to the region. Analytics nodes are useful for handling analytic data such as reporting queries from BI Connector for Atlas. Analytics nodes are read-only, and can never become the primary.

replicationSpecs[n].regionsConfig.<region>.electableNodes
number
Optional

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

The total number of electableNodes across all replicationSpecs[n].regionsConfig.<region> object must be 3, 5, or 7.

Specify 0 if you do not want any electable nodes in the region.

You cannot create electable nodes if the replicationSpecs[n].regionsConfig.<region>.priority is 0.

replicationSpecs[n].regionsConfig.<region>.priority
number
Optional

Election priority of the region. For regions with only replicationSpecs[n].regionsConfig.<region>.readOnlyNodes, set this value to 0.

For regions where replicationSpecs[n].regionsConfig.<region>.electableNodes is at least 1, each replicationSpecs[n].regionsConfig.<region> must have a priority of exactly one (1) less than the previous region. The first 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.

replicationSpecs[n].regionsConfig.<region>.readOnlyNodes
number
Optional

Number of read-only nodes for Atlas to deploy to the region. Read-only nodes can never become the primary, but can facilitate local-reads.

Specify 0 if you do not want any read-only nodes in the region.

replicationSpecs[n].zoneName
string
Optional
Name for the zone in a Global Cluster. Don't provide this value if clusterType is not GEOSHARDED.
rootCertType
string
Optional
Important
Feature unavailable in Free and Shared-Tier Clusters

This feature is not available for M0 free clusters, M2, and M5 clusters. To learn more about which features are unavailable, see Atlas M0 (Free Cluster), M2, and M5 Limitations.

Certificate Authority that MongoDB Atlas clusters use. You can specify ISRGROOTX1 (for ISRG Root X1).

Note

Beginning on 1 May 2021, new TLS certificates that MongoDB Atlas creates use ISRG instead of IdenTrust for their root Certificate Authority in line with Let's Encrypt's announcement of this transition.

versionReleaseSystem
string
Conditional

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

  • CONTINUOUS: Atlas automatically updates your cluster to the latest major and rapid MongoDB releases as they become available.
  • LTS: 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 you set this field to CONTINUOUS, you must omit the mongoDBMajorVersion field.

You can change from LTS to CONTINUOUS only if your cluster runs the most recent MongoDB major release.

You can change from CONTINUOUS to LTS only if the most recent MongoDB release is a major version. For example, if the most recent MongoDB release is 5.0, you can switch from CONTINUOUS to LTS. If the most recent MongoDB release is 5.1, you must wait until MongoDB 6.0 is released to switch from CONTINUOUS to LTS.

Name
Type
Description
autoScaling
object

Collection of settings that configures auto-scaling information for the cluster.

Tip
autoScaling.compute
object
Collection of settings that configure how a cluster might scale its cluster tier and whether the cluster can scale down.
autoScaling.compute.enabled
boolean
Flag that indicates whether cluster tier auto-scaling is enabled.
autoScaling.compute.scaleDownEnabled
boolean
Flag that indicates whether the cluster tier can scale down.
autoScaling.diskGBEnabled
boolean
Flag that indicates whether disk auto-scaling is enabled.
backupEnabled
boolean

Flag that indicates whether legacy backup has been enabled.

Important

Clusters running MongoDB FCV 4.2 or later and any new Atlas clusters of any type do not support this parameter. These clusters must use Cloud Backups: providerBackupEnabled

This change doesn't affect existing Atlas clusters that use legacy backups.

biConnector
object

Collection of settings that configure a BI Connector for Atlas for the cluster.

The MongoDB Connector for Business Intelligence for Atlas (BI Connector) is only available for M10 and larger clusters.

The BI Connector is a powerful tool which provides users SQL-based access to their MongoDB databases. As a result, the BI Connector performs operations which may be CPU and memory intensive. Given the limited hardware resources on M10 and M20 cluster tiers, you may experience performance degradation of the cluster when enabling the BI Connector. If this occurs, upgrade to an M30 or larger cluster or disable the BI Connector.

biConnector.enabled
boolean
Flag that indicates whether Atlas enabled the BI Connector for Atlas for this cluster.
biConnector.readPreference
string

Source from which the BI Connector for Atlas reads data.

Value
Description
primary
BI Connector for Atlas reads data from the primary.
secondary
BI Connector for Atlas reads data from a secondary.
analytics
BI Connector for Atlas reads data from an
analytics node.
clusterType
string

Type of the cluster:

Value
Description
REPLICASET
SHARDED
GEOSHARDED
connectionStrings
object

Set of connection strings that your applications use to connect to this cluster.

Use the parameters in this object to connect your applications to this cluster.

Atlas returns the contents of this object after the cluster is operational, not while it builds the cluster.

connectionStrings.privateEndpoint
array of objects
Private endpoint connection strings. Each object describes the connection strings you can use to connect to this cluster through a private endpoint. Atlas returns this parameter only if you deployed a private endpoint to all regions to which you deployed this cluster's nodes.
connectionStrings.privateEndpoint[n].connectionString
string
Private-endpoint-aware mongodb://connection string for this private endpoint.
connectionStrings.privateEndpoint[n].endpoints
array of objects
Private endpoint through which you connect to Atlas when you use connectionStrings.privateEndpoint[n].connectionString or connectionStrings.privateEndpoint[n].srvConnectionString.
connectionStrings.privateEndpoint[n].endpoints[n].endpointId
string
Unique identifier of the private endpoint.
connectionStrings.privateEndpoint[n].endpoints[n].providerName
string
Cloud provider to which you deployed the private endpoint. Atlas returns AWS, AZURE, or GCP.
connectionStrings.privateEndpoint[n].endpoints[n].region
string
Region to which you deployed the private endpoint.
connectionStrings.privateEndpoint[n].srvConnectionString
string

Private-endpoint-aware mongodb+srv:// connection string for this private endpoint.

The mongodb+srv protocol tells the driver to look up the seed list of hosts in DNS. Atlas synchronizes this list with the nodes in a cluster. If the connection string uses this URI format, you don't need to:

  • Append the seed list or
  • Change the URI if the nodes change.

Use this URI format if your driver supports it. If it doesn't, use connectionStrings.privateEndpoint[n].connectionString.

Tip
See also:
connectionStrings.privateEndpoint[n].type
string

Type of MongoDB process that you connect to with the connection strings. Atlas returns:

  • MONGOD for replica sets, or
  • MONGOS for sharded clusters.
connectionStrings.standard
string
Public mongodb:// connection string for this cluster.
connectionStrings.standardSrv
string

Public mongodb+srv:// connection string for this cluster.

Tip
See also:
connectionStrings.private
string

Network-peering-endpoint-aware mongodb://connection strings for each interface VPC endpoint you configured to connect to this cluster. Atlas returns this parameter only if you created a network peering connection to this cluster.

Note

For AWS clusters, Atlas doesn't return this parameter unless you enable custom DNS.

connectionStrings.privateSrv
string

Network-peering-endpoint-aware mongodb+srv:// connection strings for each interface VPC endpoint you configured to connect to this cluster. Atlas returns this parameter only if you created a network peering connection to this cluster.

The mongodb+srv protocol tells the driver to look up the seed list of hosts in DNS. Atlas synchronizes this list with the nodes in a cluster. If the connection string uses this URI format, you don't need to:

  • Append the seed list or
  • Change the URI if the nodes change.

Use this URI format if your driver supports it. If it doesn't, use connectionStrings.private.

Tip
See also:
Note

For AWS clusters, Atlas doesn't return this parameter unless you enable custom DNS.

connectionStrings.awsPrivateLink
object
Important

This field is deprecated. Use connectionStrings.privateEndpoint[n].connectionString instead.

Note

Atlas returns this parameter only if:

  • the cluster is deployed to AWS, and
  • you deployed a AWS PrivateLink private endpoint to the same regions as all of this cluster's nodes.

Private-endpoint-aware mongodb://connection strings for each AWS PrivateLink private endpoint. Atlas returns this parameter only if you deployed a AWS PrivateLink private endpoint to the same regions as all of this cluster's nodes.

In this object:

  • Each key is the unique identifier of an interface endpoint.
  • Each value is the mongodb:// connection string you use to connect to Atlas through the interface endpoint the key names.
connectionStrings.awsPrivateLinkSrv
object
Important

This field is deprecated. Use connectionStrings.privateEndpoint[n].srvConnectionString instead.

Note

Atlas returns this parameter only if:

  • the cluster is deployed to AWS, and
  • you deployed a AWS PrivateLink private endpoint to the same regions as all of this cluster's nodes.

Private-endpoint-aware mongodb+srv:// connection strings for each AWS PrivateLink private endpoint.

In this object:

  • Each key is the unique identifier of an interface endpoint.
  • Each value is the mongodb+srv:// connection string you use to connect to Atlas through the interface endpoint the key names.

The mongodb+srv protocol tells the driver to look up the seed list of hosts in DNS. Atlas synchronizes this list with the nodes in a cluster. If the connection string uses this URI format, you don't need to:

  • Append the seed list or
  • Change the URI if the nodes change.

Use this URI format if your driver supports it. If it doesn't, use connectionStrings.awsPrivateLink.

Tip
See also:
createDate
string
Timestamp in ISO 8601 date and time format in UTC when Atlas created the cluster.
diskSizeGB
number

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

Note
When should you use diskSizeGB?

This setting:

The minimum disk size for dedicated clusters is 10 GB for AWS and Google Cloud, and 32 GB for Azure. If you specify diskSizeGB with a lower disk size, Atlas defaults to the minimum disk size value.

Important

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

Tip
See also:

The maximum value for disk storage cannot exceed 50 times the maximum RAM for the selected cluster. If you require additional storage space beyond this limitation, consider upgrading your cluster to a higher tier.

encryptionAtRestProvider
string

Cloud service provider that offers Encryption at Rest.

groupId
string
Unique identifier of the project to which the cluster belongs.
id
string
Unique identifier of the cluster.
labels
array of documents
Collection of key-value pairs that tag and categorize the cluster.
mongoDBVersion
string
Version of MongoDB the cluster runs, in <major version>.<minor version>.<patch version> format.
mongoDBMajorVersion
string

Major version of MongoDB the cluster runs:

  • 4.0
  • 4.2
  • 4.4
  • 5.0
mongoURI
string

Base connection string for the cluster.

Atlas only displays this parameter after the cluster is operational, not while it builds the cluster.

mongoURIUpdated
string
Timestamp in ISO 8601 date and time format in UTC when the connection string was last updated. The connection string changes if you update any of the other values.
mongoURIWithOptions
string

connection string for connecting to the Atlas cluster. Includes the replicaSet, ssl, and authSource query parameters in the connection string with values appropriate for the cluster.

To review the connection string format, see the connection string format documentation. To add database users to a Atlas project, see Configure Database Users.

Atlas only displays this parameter after the cluster is operational, not while it builds the cluster.

name
string
Name of the cluster as it appears in Atlas.
numShards
number

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

If this is set to 1, the cluster is a replica set.

If this is set to 2 or higher, the cluster is a sharded cluster with the number of shards specified.

Tip
See also:

Atlas might return values between 1 and 50.

Note

Atlas doesn't return this value in the response body for Global Clusters.

paused
boolean
Flag that indicates whether the cluster is paused.
pitEnabled
boolean
Flag that indicates if the cluster uses Continuous Cloud Backup backups.
providerBackupEnabled
boolean

This applies to dedicated clusters, M10 or greater, only.

Flag that indicates if the cluster uses Cloud Backups for backups.

If true, the cluster uses Cloud Backups for backups. If providerBackupEnabled and backupEnabled are false, the cluster does not use Atlas backups.

providerSettings
object
Configuration for the provisioned hosts on which MongoDB runs. The available options are specific to the cloud service provider.
providerSettings.autoScaling
object

Range of instance sizes to which your cluster can scale.

Important

You can't specify the providerSettings.autoScaling object if "autoScaling.compute.enabled" : false.

providerSettings.autoScaling.compute
object
Range of instance sizes to which your cluster can scale. Atlas requires this parameter if "autoScaling.compute.enabled" : true.
providerSettings.autoScaling.compute.minInstanceSize
string
Minimum instance size to which your cluster can automatically scale.
providerSettings.autoScaling.compute.maxInstanceSize
string
Maximum instance size to which your cluster can automatically scale.
providerSettings.backingProviderName
string

Cloud service provider on which the multi-tenant host is provisioned. Atlas returns this parameter only if "providerSettings.providerName" : "TENANT".

Atlas can return:

AWS
Amazon AWS
GCP
Google Cloud Platform
AZURE
Microsoft Azure
TENANT

M2 or M5 multi-tenant cluster

Use providerSettings.backingProviderName to set the cloud service provider.

providerSettings.providerName
string

Cloud service provider on which Atlas provisioned the hosts.

Atlas can return:

AWS
Amazon AWS
GCP
Google Cloud Platform
AZURE
Microsoft Azure
TENANT

M2 or M5 multi-tenant cluster

Use providerSettings.backingProviderName to set the cloud service provider.

TENANT

M2 or M5 multi-tenant cluster.

See providerSettings.backingProviderName for the cloud service provider where Atlas provisioned the host serving the cluster.

providerSettings.regionName
string

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 the cloud provider reference pages:

For multi-region clusters, see replicationSpec.<region>.

providerSettings.diskIOPS
number
Maximum IOPS the system can perform.
providerSettings.diskTypeName
string

Disk type of the host's root volume for Azure instances.

The following table lists the possible values for this parameter, and their corresponding storage size.

diskTypeName
Storage Size
P2 [1]
8GB
P3 [2]
16GB
P4 [3]
32GB
P6 [4]
64GB
P10
128GB
P15
256GB
P20
512GB
P30
1024GB
P40
2048GB
P50
4095GB
[1] Default for M10 Azure clusters
[2] Default for M20 Azure clusters
[3] Default for M30 Azure clusters
[4] Default for M40+ Azure clusters
providerSettings.encryptEBSVolume
boolean
Flag that indicates whether the Amazon EBS encryption feature encrypts the host's root volume for both data at rest within the volume and for data moving between the volume and the cluster.
providerSettings.instanceSizeName
string

Name of the cluster tier used for the Atlas cluster.

Atlas supports the following cluster tiers. Atlas supports deploying M2 and M5 tiers into a subset of available regions. The documentation for providersettings.regionName includes a list of these regions.

Note
Cluster Tier Naming Conventions

Cluster tier names that are:

  • Appended with _NVME (M40_NVME for example) use direct attached NVMe storage for exceptional performance with the most I/O-intensive workloads.
  • Prepended with R instead of an M (R40 for example) run a low CPU version of the cluster.

M2 and M5 clusters are multi-tenant deployments. You must set providerSettings.providerName to TENANT and specify the cloud service provider in providerSettings.backingProviderName.

replicationFactor
number

Number of replica set members. Each member keeps a copy of your databases, providing high availability and data redundancy.

For multi-region clusters, add the total number of replicationSpec.<region>.electableNodes to calculate the replication factor of the cluster.

If your cluster is a sharded cluster, each shard is a replica set with the specified replication factor.

Atlas may return 3, 5, or 7.

replicationSpec
object
Configuration of each region in the cluster. Each element in this object represents a region where Atlas deploys your cluster.
replicationSpec.<region>
object

Physical location of the region. The <region> string corresponds to a region where Atlas deploys your cluster.

Each <region> object describes the region's priority in elections and the number and type of MongoDB nodes Atlas deploys to the region.

replicationSpec.<region>.analyticsNodes
number
Number of analytics nodes in the region. Analytics nodes are useful for handling analytic data such as reporting queries from BI Connector for Atlas. Analytics nodes are read-only, and can never become the primary.
replicationSpec.<region>.electableNodes
number
Number of electable nodes in the region. Electable nodes can become the primary and can facilitate local reads.
replicationSpec.<region>.priority
number

Election priority of the region. The highest possible priority is 7, which identifies the Preferred Region of the cluster. Atlas places the primary node in the Preferred Region. The lowest possible priority is 0, which identifies a read-only region.

You can have any number of priority 0 read only regions. Priorities 1 through 7 are exclusive: only one region per cluster can be assigned a given priority.

replicationSpec.<region>.readOnlyNodes
number
Number of read-only nodes in the region. Read-only nodes can never become the primary member, but can facilitate local reads.
replicationSpecs
array
Configuration for each zone in a Global Cluster. Each object in this array represents a zone where Atlas deploys nodes for your Global Cluster.
replicationSpecs[n].id
string
Unique identifier of the replication object.
replicationSpecs[n].zoneName
string
Name for the zone.
replicationSpecs[n].numShards
number
Number of shards to deploy in the specified zone.
replicationSpecs[n].regionsConfig
object
Physical location of the region. Each regionsConfig object describes the region's priority in elections and the number and type of MongoDB nodes that Atlas deploys to the region.
replicationSpecs[n].regionsConfig.<region>.analyticsNodes
number

Number of analytics nodes for Atlas to deploy to the region. Analytics nodes are useful for handling analytic data such as reporting queries from BI Connector for Atlas. Analytics nodes are read-only, and can never become the primary.

replicationSpecs[n].regionsConfig.<region>.electableNodes
number
Number of electable nodes for Atlas to deploy to the region. Electable nodes can become the primary and can facilitate local reads.
replicationSpecs[n].regionsConfig.<region>.readOnlyNodes
number

Number of read-only nodes for Atlas to deploy to the region. Read-only nodes can never become the primary, but can facilitate local-reads.

Specify 0 if you do not want any read-only nodes in the region.

replicationSpecs[n].regionsConfig.<region>.priority
number
Election priority of the region. If you have regions with only read-only nodes, set this value to 0.
replicationSpecs[n].zoneName
string
Name for the zone in a Global Cluster. Do not provide this value if clusterType is not GEOSHARDED.
rootCertType
string

Certificate Authority that MongoDB Atlas clusters use. Value can be ISRGROOTX1 (for ISRG Root X1).

Note

Beginning on 1 May 2021, new TLS certificates that MongoDB Atlas creates use ISRG instead of IdenTrust for their root Certificate Authority in line with Let's Encrypt's announcement of this transition.

srvAddress
string
Connection string for connecting to the Atlas cluster. The +srv modifier forces the connection to use TLS. The mongoURI parameter lists additional options.
stateName
string

Current state of the cluster. The possible states are:

  • IDLE
  • CREATING
  • UPDATING
  • DELETING
  • DELETED
  • REPAIRING
versionReleaseSystem
string

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

  • CONTINUOUS: Atlas automatically updates your cluster to the latest major and rapid MongoDB releases as they become available.
  • LTS: 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.
HTTP/1.1 401 Unauthorized
Content-Type: application/json;charset=ISO-8859-1
Date: {dateInUnixFormat}
WWW-Authenticate: Digest realm="MMS Public API", domain="", nonce="{nonce}", algorithm=MD5, op="auth", stale=false
Content-Length: {requestLengthInBytes}
Connection: keep-alive
HTTP/1.1 200 OK
Vary: Accept-Encoding
Content-Type: application/json
Strict-Transport-Security: max-age=300
Date: {dateInUnixFormat}
Connection: keep-alive
Content-Length: {requestLengthInBytes}
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