使用Lambda将文件从S3复制到EMR本地 [英] Copy files from S3 to EMR local using Lambda
问题描述
我需要使用Lambda以编程方式将文件从S3移到EMR的本地目录/home/hadoop.
I need to move the files from S3 to EMR's local dir /home/hadoop programmatically using Lambda.
S3DistCp复制到HDFS.然后,我登录EMR并在命令行上运行CopyToLocal hdfs命令,以将文件获取到/home/hadoop.
S3DistCp copies over to HDFS. I then login into EMR and run a CopyToLocal hdfs command on commandline to get the files to /home/hadoop.
是否存在使用Lambda中的boto3从S3复制到Emr的本地目录的编程方式?
Is there a programmatic way using boto3 in Lambda to copy from S3 to Emr's local dir?
推荐答案
我编写了一个测试Lambda函数,以将作业步骤提交给EMR,该步骤将文件从S3复制到EMR的本地目录.这行得通.
I wrote a test Lambda function to submit a job step to EMR that copies files from S3 to EMR's local dir. This worked.
emrclient = boto3.client('emr', region_name='us-west-2')
def lambda_handler(event, context):
EMRS = emrclient.list_clusters( ClusterStates = ['STARTING', 'RUNNING', 'WAITING'] )
clusters = EMRS["Clusters"]
print(clusters)
for cluster in clusters:
ID = cluster["Id"]
response = emrclient.add_job_flow_steps(JobFlowId=ID,
Steps=[
{
'Name': 'AWS S3 Copy',
'ActionOnFailure': 'CONTINUE',
'HadoopJarStep': {
'Jar': 'command-runner.jar',
'Args':["aws","s3","cp","s3://XXX/","/home/hadoop/copy/","--recursive"],
}
}
],
)
如果有更好的复制方法,请告诉我.
If there are better ways to do the copy, please do let me know.
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