airflow.providers.amazon.aws.hooks.emr

Module Contents

Classes

EmrHook

Interact with AWS EMR. emr_conn_id is only necessary for using the

EmrContainerHook

Interact with AWS EMR Virtual Cluster to run, poll jobs and return job status
class airflow.providers.amazon.aws.hooks.emr.EmrHook(emr_conn_id=default_conn_name, *args, **kwargs)[source]

Bases: airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook

Interact with AWS EMR. emr_conn_id is only necessary for using the create_job_flow method.

Additional arguments (such as aws_conn_id) may be specified and are passed down to the underlying AwsBaseHook.

See also

AwsBaseHook

conn_name_attr = emr_conn_id[source]
default_conn_name = emr_default[source]
conn_type = emr[source]
hook_name = Amazon Elastic MapReduce[source]
get_cluster_id_by_name(self, emr_cluster_name, cluster_states)[source]

Fetch id of EMR cluster with given name and (optional) states. Will return only if single id is found.

Parameters

  • emr_cluster_name (str) – Name of a cluster to find

  • cluster_states (List[str]) – State(s) of cluster to find

Returns

id of the EMR cluster

Return type

Optional[str]

create_job_flow(self, job_flow_overrides)[source]

Creates a job flow using the config from the EMR connection. Keys of the json extra hash may have the arguments of the boto3 run_job_flow method. Overrides for this config may be passed as the job_flow_overrides.

class airflow.providers.amazon.aws.hooks.emr.EmrContainerHook(*args, virtual_cluster_id=None, **kwargs)[source]

Bases: airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook

Interact with AWS EMR Virtual Cluster to run, poll jobs and return job status Additional arguments (such as aws_conn_id) may be specified and are passed down to the underlying AwsBaseHook.

See also

AwsBaseHook

Parameters

virtual_cluster_id (Optional[str]) – Cluster ID of the EMR on EKS virtual cluster

INTERMEDIATE_STATES = ['PENDING', 'SUBMITTED', 'RUNNING'][source]
FAILURE_STATES = ['FAILED', 'CANCELLED', 'CANCEL_PENDING'][source]
SUCCESS_STATES = ['COMPLETED'][source]
TERMINAL_STATES = ['COMPLETED', 'FAILED', 'CANCELLED', 'CANCEL_PENDING'][source]
submit_job(self, name, execution_role_arn, release_label, job_driver, configuration_overrides=None, client_request_token=None, tags=None)[source]

Submit a job to the EMR Containers API and return the job ID. A job run is a unit of work, such as a Spark jar, PySpark script, or SparkSQL query, that you submit to Amazon EMR on EKS. See: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/emr-containers.html#EMRContainers.Client.start_job_run # noqa: E501

Parameters

  • name (str) – The name of the job run.

  • execution_role_arn (str) – The IAM role ARN associated with the job run.

  • release_label (str) – The Amazon EMR release version to use for the job run.

  • job_driver (dict) – Job configuration details, e.g. the Spark job parameters.

  • configuration_overrides (Optional[dict]) – The configuration overrides for the job run, specifically either application configuration or monitoring configuration.

  • client_request_token (Optional[str]) – The client idempotency token of the job run request. Use this if you want to specify a unique ID to prevent two jobs from getting started.

  • tags (Optional[dict]) – The tags assigned to job runs.

Returns

Job ID

Return type

str

get_job_failure_reason(self, job_id)[source]

Fetch the reason for a job failure (e.g. error message). Returns None or reason string.

Parameters

job_id (str) – Id of submitted job run

Returns

str

Return type

Optional[str]

check_query_status(self, job_id)[source]

Fetch the status of submitted job run. Returns None or one of valid query states. See: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/emr-containers.html#EMRContainers.Client.describe_job_run # noqa: E501 :param job_id: Id of submitted job run :return: str

poll_query_status(self, job_id, max_tries=None, poll_interval=30)[source]

Poll the status of submitted job run until query state reaches final state. Returns one of the final states.

Parameters

  • job_id (str) – Id of submitted job run

  • max_tries (Optional[int]) – Number of times to poll for query state before function exits

  • poll_interval (int) – Time (in seconds) to wait between calls to check query status on EMR

Returns

str

Return type

Optional[str]

stop_query(self, job_id)[source]

Cancel the submitted job_run

Parameters

job_id (str) – Id of submitted job_run

Returns

dict

Return type

Dict

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