Google Cloud Dataproc: Node.js Client

Google Cloud Dataproc API client for Node.js

Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in Client Libraries Explained.

Table of contents:

Quickstart
Samples
Versioning
Contributing
License

Quickstart

Before you begin

Select or create a Cloud Platform project.
Enable billing for your project.
Enable the Google Cloud Dataproc API.
Set up authentication with a service account so you can access the API from your local workstation.

Installing the client library

npm install @google-cloud/dataproc

Using the client library

// This quickstart sample walks a user through creating a Cloud Dataproc
// cluster, submitting a PySpark job from Google Cloud Storage to the
// cluster, reading the output of the job and deleting the cluster, all
// using the Node.js client library.

'use strict';

function main(projectId, region, clusterName, jobFilePath) {
  const dataproc = require('@google-cloud/dataproc');
  const {Storage} = require('@google-cloud/storage');

  // Create a cluster client with the endpoint set to the desired cluster region
  const clusterClient = new dataproc.v1.ClusterControllerClient({
    apiEndpoint: `${region}-dataproc.googleapis.com`,
    projectId: projectId,
  });

  // Create a job client with the endpoint set to the desired cluster region
  const jobClient = new dataproc.v1.JobControllerClient({
    apiEndpoint: `${region}-dataproc.googleapis.com`,
    projectId: projectId,
  });

  async function quickstart() {
    // Create the cluster config
    const cluster = {
      projectId: projectId,
      region: region,
      cluster: {
        clusterName: clusterName,
        config: {
          masterConfig: {
            numInstances: 1,
            machineTypeUri: 'n1-standard-1',
          },
          workerConfig: {
            numInstances: 2,
            machineTypeUri: 'n1-standard-1',
          },
        },
      },
    };

    // Create the cluster
    const [operation] = await clusterClient.createCluster(cluster);
    const [response] = await operation.promise();

    // Output a success message
    console.log(`Cluster created successfully: ${response.clusterName}`);

    const job = {
      projectId: projectId,
      region: region,
      job: {
        placement: {
          clusterName: clusterName,
        },
        pysparkJob: {
          mainPythonFileUri: jobFilePath,
        },
      },
    };

    let [jobResp] = await jobClient.submitJob(job);
    const jobId = jobResp.reference.jobId;

    console.log(`Submitted job "${jobId}".`);

    // Terminal states for a job
    const terminalStates = new Set(['DONE', 'ERROR', 'CANCELLED']);

    // Create a timeout such that the job gets cancelled if not
    // in a termimal state after a fixed period of time.
    const timeout = 600000;
    const start = new Date();

    // Wait for the job to finish.
    const jobReq = {
      projectId: projectId,
      region: region,
      jobId: jobId,
    };

    while (!terminalStates.has(jobResp.status.state)) {
      if (new Date() - timeout > start) {
        await jobClient.cancelJob(jobReq);
        console.log(
          `Job ${jobId} timed out after threshold of ` +
            `${timeout / 60000} minutes.`
        );
        break;
      }
      await sleep(1);
      [jobResp] = await jobClient.getJob(jobReq);
    }

    const clusterReq = {
      projectId: projectId,
      region: region,
      clusterName: clusterName,
    };

    const [clusterResp] = await clusterClient.getCluster(clusterReq);

    const storage = new Storage();

    const output = await storage
      .bucket(clusterResp.config.configBucket)
      .file(
        `google-cloud-dataproc-metainfo/${clusterResp.clusterUuid}/` +
          `jobs/${jobId}/driveroutput.000000000`
      )
      .download();

    // Output a success message.
    console.log(
      `Job ${jobId} finished with state ${jobResp.status.state}:\n${output}`
    );

    // Delete the cluster once the job has terminated.
    const [deleteOperation] = await clusterClient.deleteCluster(clusterReq);
    await deleteOperation.promise();

    // Output a success message
    console.log(`Cluster ${clusterName} successfully deleted.`);
  }

  quickstart();
}

// Helper function to sleep for the given number of seconds
function sleep(seconds) {
  return new Promise(resolve => setTimeout(resolve, seconds * 1000));
}

const args = process.argv.slice(2);

if (args.length !== 4) {
  console.log(
    'Insufficient number of parameters provided. Please make sure a ' +
      'PROJECT_ID, REGION, CLUSTER_NAME and JOB_FILE_PATH are provided, in this order.'
  );
}

main(...args);

Samples

Samples are in the samples/ directory. The samples' README.md has instructions for running the samples.

Sample	Source Code	Try it
Create Cluster	source code
Instantiate an inline workflow template	source code
Quickstart	source code

The Google Cloud Dataproc Node.js Client API Reference documentation also contains samples.

Supported Node.js Versions

Our client libraries follow the Node.js release schedule. Libraries are compatible with all current active and maintenance versions of Node.js.

Client libraries targetting some end-of-life versions of Node.js are available, and can be installed via npm dist-tags. The dist-tags follow the naming convention legacy-(version).

Legacy Node.js versions are supported as a best effort:

Legacy versions will not be tested in continuous integration.
Some security patches may not be able to be backported.
Dependencies will not be kept up-to-date, and features will not be backported.

Legacy tags available

legacy-8: install client libraries from this dist-tag for versions compatible with Node.js 8.

Versioning

This library follows Semantic Versioning.

This library is considered to be General Availability (GA). This means it is stable; the code surface will not change in backwards-incompatible ways unless absolutely necessary (e.g. because of critical security issues) or with an extensive deprecation period. Issues and requests against GA libraries are addressed with the highest priority.

More Information: Google Cloud Platform Launch Stages

Contributing

Contributions welcome! See the Contributing Guide.

Please note that this README.md, the samples/README.md, and a variety of configuration files in this repository (including .nycrc and tsconfig.json) are generated from a central template. To edit one of these files, make an edit to its template in this directory.

License

Apache Version 2.0

See LICENSE