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Resume an AWS Redshift Cluster

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Resuming an AWS Redshift cluster is the process of reactivating a previously paused cluster, bringing it back to its full operational state. This task resumes a cluster which means that computational capabilities are restored, and users can immediately execute queries, access data, and perform other database tasks. Resuming is swift, ensuring minimal downtime and enabling seamless transitions between paused and available/active states. This feature is invaluable for organizations that pause their clusters during off-peak hours to save costs and need to promptly reactivate them when demand surges, ensuring optimal resource utilization and cost efficiency.

import boto3 creds = _get_creds(cred_label)['creds'] access_key = creds['username'] secret_key = creds['password'] # Check if 'cluster_identifier' has been provided from the parent task. If not, initialize it to an empty string. cluster_identifier = cluster_identifier if 'cluster_identifier' in locals() else "" def resume_redshift_cluster(cluster_id, region): # Check if the cluster_id is empty or not if not cluster_id: print("No Redshift Cluster provided for resuming.") return try: redshift = boto3.client('redshift',aws_access_key_id=access_key,aws_secret_access_key=secret_key, region_name = region) # Attempt to resume the specified Redshift cluster response = redshift.resume_cluster(ClusterIdentifier=cluster_id) # Check the cluster status to confirm the resume operation if response['Cluster']['ClusterStatus'] == 'resuming': print(f"Resuming cluster {cluster_id}.") return True else: print(f"Unexpected status {response['Cluster']['ClusterStatus']} for cluster {cluster_id}.") return False # Handle specific exceptions except redshift.exceptions.ClusterNotFoundFault: print(f"Cluster {cluster_id} not found.") return False except redshift.exceptions.InvalidClusterStateFault: print(f"Cluster {cluster_id} is in an invalid state for resuming. Ensure it is currently paused.") return False except redshift.exceptions.UnauthorizedOperation: print(f"Unauthorized to resume cluster {cluster_id}. Check your AWS IAM permissions.") return False # Handle general exceptions except Exception as e: print(f"Error resuming cluster {cluster_id}: {e}") return False # Try resuming the cluster and print feedback success = resume_redshift_cluster(cluster_identifier, resume_cluster_region) if success is not None: if success: print("Resume operation initiated successfully.") else: print("Failed to initiate resume operation.")
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