The NodeGroupControllerService provides methods to manage node groups of Compute Engine managed instances.
Equality
Instances of this class created via copy-construction or copy-assignment always compare equal. Instances created with equal std::shared_ptr<*Connection> objects compare equal. Objects that compare equal share the same underlying resources.
Performance
Creating a new instance of this class is a relatively expensive operation, new objects establish new connections to the service. In contrast, copy-construction, move-construction, and the corresponding assignment operations are relatively efficient as the copies share all underlying resources.
Thread Safety
Concurrent access to different instances of this class, even if they compare equal, is guaranteed to work. Two or more threads operating on the same instance of this class is not guaranteed to work. Since copy-construction and move-construction is a relatively efficient operation, consider using such a copy when using this class from multiple threads.
Required. The parent resource where this node group will be created. Format: projects/{project}/regions/{region}/clusters/{cluster}
node_group
google::cloud::dataproc::v1::NodeGroup const &
Required. The node group to create.
node_group_id
std::string const &
Optional. An optional node group ID. Generated if not specified.
The ID must contain only letters (a-z, A-Z), numbers (0-9), underscores (_), and hyphens (-). Cannot begin or end with underscore or hyphen. Must consist of from 3 to 33 characters.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
A future that becomes satisfied when the LRO (Long Running Operation) completes or the polling policy in effect for this call is exhausted. The future is satisfied with an error if the LRO completes with an error or the polling policy is exhausted. In this case the StatusOr returned by the future contains the error. If the LRO completes successfully the value of the future contains the LRO's result. For this RPC the result is a google.cloud.dataproc.v1.NodeGroup proto message. The C++ class representing this message is created by Protobuf, using the Protobuf mapping rules.
Specifying the NoAwaitTag immediately returns the [google::longrunning::Operation] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.
Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.dataproc.v1.CreateNodeGroupRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
A future that becomes satisfied when the LRO (Long Running Operation) completes or the polling policy in effect for this call is exhausted. The future is satisfied with an error if the LRO completes with an error or the polling policy is exhausted. In this case the StatusOr returned by the future contains the error. If the LRO completes successfully the value of the future contains the LRO's result. For this RPC the result is a google.cloud.dataproc.v1.NodeGroup proto message. The C++ class representing this message is created by Protobuf, using the Protobuf mapping rules.
Specifying the NoAwaitTag immediately returns the [google::longrunning::Operation] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.
This method accepts a google::longrunning::Operation that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.
Required. The name of the node group to resize. Format: projects/{project}/regions/{region}/clusters/{cluster}/nodeGroups/{nodeGroup}
size
std::int32_t
Required. The number of running instances for the node group to maintain. The group adds or removes instances to maintain the number of instances specified by this parameter.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
A future that becomes satisfied when the LRO (Long Running Operation) completes or the polling policy in effect for this call is exhausted. The future is satisfied with an error if the LRO completes with an error or the polling policy is exhausted. In this case the StatusOr returned by the future contains the error. If the LRO completes successfully the value of the future contains the LRO's result. For this RPC the result is a google.cloud.dataproc.v1.NodeGroup proto message. The C++ class representing this message is created by Protobuf, using the Protobuf mapping rules.
Specifying the NoAwaitTag immediately returns the [google::longrunning::Operation] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.
Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.dataproc.v1.ResizeNodeGroupRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
A future that becomes satisfied when the LRO (Long Running Operation) completes or the polling policy in effect for this call is exhausted. The future is satisfied with an error if the LRO completes with an error or the polling policy is exhausted. In this case the StatusOr returned by the future contains the error. If the LRO completes successfully the value of the future contains the LRO's result. For this RPC the result is a google.cloud.dataproc.v1.NodeGroup proto message. The C++ class representing this message is created by Protobuf, using the Protobuf mapping rules.
Specifying the NoAwaitTag immediately returns the [google::longrunning::Operation] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.
This method accepts a google::longrunning::Operation that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.
Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.dataproc.v1.GetNodeGroupRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-03 UTC."],[[["\u003cp\u003eThis page details the \u003ccode\u003eNodeGroupControllerClient\u003c/code\u003e, which manages node groups for Compute Engine instances, specifically focusing on the C++ client library for Google Cloud Dataproc.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the C++ client for \u003ccode\u003eNodeGroupControllerClient\u003c/code\u003e is 2.37.0-rc, with previous versions available, including 2.30.0 and others down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eNodeGroupControllerClient\u003c/code\u003e supports operations like creating, resizing, and retrieving node groups within a cluster, which includes setting the number of instances or using a pre-existing \u003ccode\u003egoogle::longrunning::Operation\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eCopying and moving instances of \u003ccode\u003eNodeGroupControllerClient\u003c/code\u003e is relatively efficient, as they share underlying resources, while creating a new instance is more resource-intensive.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eNodeGroupControllerClient\u003c/code\u003e provides multiple functions that can be used when interacting with the \u003ccode\u003eNodeGroup\u003c/code\u003e objects, and each function has a description, parameters, and returns value section, and may or may not utilize the \u003ccode\u003eNoAwaitTag\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,["# Class NodeGroupControllerClient (2.30.0)\n\nVersion 2.30.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/dataproc/latest/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.41.0](/cpp/docs/reference/dataproc/2.41.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.40.0](/cpp/docs/reference/dataproc/2.40.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.39.0](/cpp/docs/reference/dataproc/2.39.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.38.0](/cpp/docs/reference/dataproc/2.38.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.37.0](/cpp/docs/reference/dataproc/2.37.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.36.0](/cpp/docs/reference/dataproc/2.36.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.35.0](/cpp/docs/reference/dataproc/2.35.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.34.0](/cpp/docs/reference/dataproc/2.34.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.33.0](/cpp/docs/reference/dataproc/2.33.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.32.0](/cpp/docs/reference/dataproc/2.32.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.31.0](/cpp/docs/reference/dataproc/2.31.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.30.0](/cpp/docs/reference/dataproc/2.30.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.29.0](/cpp/docs/reference/dataproc/2.29.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.28.0](/cpp/docs/reference/dataproc/2.28.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.27.0](/cpp/docs/reference/dataproc/2.27.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.26.0](/cpp/docs/reference/dataproc/2.26.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.25.1](/cpp/docs/reference/dataproc/2.25.1/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.24.0](/cpp/docs/reference/dataproc/2.24.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.23.0](/cpp/docs/reference/dataproc/2.23.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.22.1](/cpp/docs/reference/dataproc/2.22.1/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.21.0](/cpp/docs/reference/dataproc/2.21.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.20.0](/cpp/docs/reference/dataproc/2.20.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.19.0](/cpp/docs/reference/dataproc/2.19.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.18.0](/cpp/docs/reference/dataproc/2.18.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.17.0](/cpp/docs/reference/dataproc/2.17.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.16.0](/cpp/docs/reference/dataproc/2.16.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.15.1](/cpp/docs/reference/dataproc/2.15.1/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.14.0](/cpp/docs/reference/dataproc/2.14.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.13.0](/cpp/docs/reference/dataproc/2.13.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.12.0](/cpp/docs/reference/dataproc/2.12.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient)\n- [2.11.0](/cpp/docs/reference/dataproc/2.11.0/classgoogle_1_1cloud_1_1dataproc__v1_1_1NodeGroupControllerClient) \nThe `NodeGroupControllerService` provides methods to manage node groups of Compute Engine managed instances. \n\n###### Equality\n\nInstances of this class created via copy-construction or copy-assignment always compare equal. Instances created with equal `std::shared_ptr\u003c*Connection\u003e` objects compare equal. Objects that compare equal share the same underlying resources.\n\n###### Performance\n\nCreating a new instance of this class is a relatively expensive operation, new objects establish new connections to the service. In contrast, copy-construction, move-construction, and the corresponding assignment operations are relatively efficient as the copies share all underlying resources.\n\n###### Thread Safety\n\nConcurrent access to different instances of this class, even if they compare equal, is guaranteed to work. Two or more threads operating on the same instance of this class is not guaranteed to work. Since copy-construction and move-construction is a relatively efficient operation, consider using such a copy when using this class from multiple threads.\n\nConstructors\n------------\n\n### NodeGroupControllerClient(NodeGroupControllerClient const \\&)\n\nCopy and move support\n\n### NodeGroupControllerClient(NodeGroupControllerClient \\&\\&)\n\nCopy and move support\n\n### NodeGroupControllerClient(std::shared_ptr\\\u003c NodeGroupControllerConnection \\\u003e, Options)\n\nOperators\n---------\n\n### operator=(NodeGroupControllerClient const \\&)\n\nCopy and move support\n\n### operator=(NodeGroupControllerClient \\&\\&)\n\nCopy and move support\n\nFunctions\n---------\n\n### CreateNodeGroup(std::string const \\&, google::cloud::dataproc::v1::NodeGroup const \\&, std::string const \\&, Options)\n\nCreates a node group in a cluster. \nThe returned [Operation.metadata](https://github.com/googleapis/googleapis/blob/69e9dff10df4fa1e338712d38dc26b46791a6e94/google/longrunning/operations.proto#L138) is [NodeGroupOperationMetadata](https://cloud.google.com/dataproc/docs/reference/rpc/google.cloud.dataproc.v1#nodegroupoperationmetadata).\n\n### CreateNodeGroup(NoAwaitTag, std::string const \\&, google::cloud::dataproc::v1::NodeGroup const \\&, std::string const \\&, Options)\n\nCreates a node group in a cluster. \nSpecifying the [`NoAwaitTag`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1NoAwaitTag.html) immediately returns the \\[`google::longrunning::Operation`\\] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.\n\n### CreateNodeGroup(google::cloud::dataproc::v1::CreateNodeGroupRequest const \\&, Options)\n\nCreates a node group in a cluster. \nThe returned [Operation.metadata](https://github.com/googleapis/googleapis/blob/69e9dff10df4fa1e338712d38dc26b46791a6e94/google/longrunning/operations.proto#L138) is [NodeGroupOperationMetadata](https://cloud.google.com/dataproc/docs/reference/rpc/google.cloud.dataproc.v1#nodegroupoperationmetadata).\n\n### CreateNodeGroup(NoAwaitTag, google::cloud::dataproc::v1::CreateNodeGroupRequest const \\&, Options)\n\nCreates a node group in a cluster. \nSpecifying the [`NoAwaitTag`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1NoAwaitTag.html) immediately returns the \\[`google::longrunning::Operation`\\] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.\n\n### CreateNodeGroup(google::longrunning::Operation const \\&, Options)\n\nCreates a node group in a cluster. \nThis method accepts a `google::longrunning::Operation` that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.\n\n### ResizeNodeGroup(std::string const \\&, std::int32_t, Options)\n\nResizes a node group in a cluster. \nThe returned [Operation.metadata](https://github.com/googleapis/googleapis/blob/69e9dff10df4fa1e338712d38dc26b46791a6e94/google/longrunning/operations.proto#L138) is [NodeGroupOperationMetadata](https://cloud.google.com/dataproc/docs/reference/rpc/google.cloud.dataproc.v1#nodegroupoperationmetadata).\n\n### ResizeNodeGroup(NoAwaitTag, std::string const \\&, std::int32_t, Options)\n\nResizes a node group in a cluster. \nSpecifying the [`NoAwaitTag`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1NoAwaitTag.html) immediately returns the \\[`google::longrunning::Operation`\\] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.\n\n### ResizeNodeGroup(google::cloud::dataproc::v1::ResizeNodeGroupRequest const \\&, Options)\n\nResizes a node group in a cluster. \nThe returned [Operation.metadata](https://github.com/googleapis/googleapis/blob/69e9dff10df4fa1e338712d38dc26b46791a6e94/google/longrunning/operations.proto#L138) is [NodeGroupOperationMetadata](https://cloud.google.com/dataproc/docs/reference/rpc/google.cloud.dataproc.v1#nodegroupoperationmetadata).\n\n### ResizeNodeGroup(NoAwaitTag, google::cloud::dataproc::v1::ResizeNodeGroupRequest const \\&, Options)\n\nResizes a node group in a cluster. \nSpecifying the [`NoAwaitTag`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1NoAwaitTag.html) immediately returns the \\[`google::longrunning::Operation`\\] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.\n\n### ResizeNodeGroup(google::longrunning::Operation const \\&, Options)\n\nResizes a node group in a cluster. \nThis method accepts a `google::longrunning::Operation` that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.\n\n### GetNodeGroup(std::string const \\&, Options)\n\nGets the resource representation for a node group in a cluster.\n\n### GetNodeGroup(google::cloud::dataproc::v1::GetNodeGroupRequest const \\&, Options)\n\nGets the resource representation for a node group in a cluster."]]
