Through this series we see how to extract information from the Elastic MapReduce ruby client, and use it to create the same command using the AWS CLI tool. In this article, we will look specifically at creating a job flow using a custom jar file.

Elastic MapReduce ruby client

Credentials

~/.aws/credentials.json

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{
"access_id": "C99F5C7EE00F1EXAMPLE",
"private_key": "a63xWEj9ZFbigxqA7wI3Nuwj3mte3RDBdEXAMPLE",
"keypair": "my-key",
"key-pair-file": "~/.ssh/my-key.pem",
"log_uri": "s3n://my-bucket/hadoop/",
"region": "us-east-1"
}

Create Job Flow

Console - user@hostname ~ $

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elastic-mapreduce -v \
--create \
--name "Test custom JAR" \
--instance-group MASTER \
--bid-price 0.06 \
--instance-count 1 \
--instance-type m1.small \
--instance-group CORE \
--bid-price 0.06 \
--instance-count 2 \
--instance-type m1.small \
--jar s3n://elasticmapreduce/samples/cloudburst/cloudburst.jar \
--arg s3n://elasticmapreduce/samples/cloudburst/input/s_suis.br \
--arg s3n://elasticmapreduce/samples/cloudburst/input/100k.br \
--arg s3n://my-bucket/cloud \
--arg 36 \
--arg 3 \
--arg 0 \
--arg 1 \
--arg 240 \
--arg 48 \
--arg 24 \
--arg 24 \
--arg 128 \
--arg 16 \
-c ~/.aws/credentials.json

Output

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Requesting URL:
https://us-east-1.elasticmapreduce.amazonaws.com/
Query string:
Steps.member.1.HadoopJarStep.Args.member.7=1&Instances.KeepJobFlowAliveWhenNoSteps=false&LogUri=s3n%3A%2F%2Fmy-bucket%2Fhadoop%2F&Steps.member.1.HadoopJarStep.Args.member.5=3&Steps.member.1.HadoopJarStep.Args.member.4=36&Instances.Ec2KeyName=my-key&Instances.InstanceGroups.member.1.InstanceRole=MASTER&Instances.InstanceGroups.member.2.InstanceType=m1.small&Name=Test%20custom%20JAR&Steps.member.1.HadoopJarStep.Args.member.3=s3n%3A%2F%2Fmy-bucket%2Fcloud&Steps.member.1.HadoopJarStep.Jar=s3n%3A%2F%2Felasticmapreduce%2Fsamples%2Fcloudburst%2Fcloudburst.jar&Steps.member.1.HadoopJarStep.Args.member.9=48&Instances.InstanceGroups.member.1.Market=SPOT&Timestamp=2013-05-16T00%3A10%3A56%2B00%3A00&Instances.InstanceGroups.member.1.BidPrice=0.06&Instances.InstanceGroups.member.2.Market=SPOT&VisibleToAllUsers=false&Steps.member.1.HadoopJarStep.Args.member.10=24&SignatureVersion=2&AWSAccessKeyId=C99F5C7EE00F1EXAMPLE&Steps.member.1.HadoopJarStep.Args.member.8=240&Instances.InstanceGroups.member.2.InstanceRole=CORE&Instances.TerminationProtected=false&Instances.InstanceGroups.member.1.InstanceCount=1&Steps.member.1.HadoopJarStep.Args.member.11=24&Steps.member.1.ActionOnFailure=CANCEL_AND_WAIT&Steps.member.1.Name=Example%20Jar%20Step&Steps.member.1.HadoopJarStep.Args.member.13=16&Instances.InstanceGroups.member.1.InstanceType=m1.small&ContentType=JSON&Steps.member.1.HadoopJarStep.Args.member.2=s3n%3A%2F%2Felasticmapreduce%2Fsamples%2Fcloudburst%2Finput%2F100k.br&Signature=wRJJpbGJBTsm4dkAoCBzthsLriWoVwY9igX%2BrSp47dI%3D&Instances.InstanceGroups.member.2.InstanceCount=2&Action=RunJobFlow&Instances.InstanceGroups.member.2.BidPrice=0.06&Steps.member.1.HadoopJarStep.Args.member.1=s3n%3A%2F%2Felasticmapreduce%2Fsamples%2Fcloudburst%2Finput%2Fs_suis.br&Steps.member.1.HadoopJarStep.Args.member.12=128&Instances.InstanceGroups.member.1.Name=Master%20Instance%20Group&Steps.member.1.HadoopJarStep.Args.member.6=0&AmiVersion=latest&SignatureMethod=HmacSHA256&Instances.InstanceGroups.member.2.Name=Core%20Instance%20Group
Headers:
x-amzn-RequestId4e95ac98-20db-445f-b8ad-883f26b10007Hostus-east-1.elasticmapreduce.amazonaws.com:443User-Agentruby-client
Created job flow j-NRW49YLR1JJEN

Formatted Output

Output - Requesting URL

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https://us-east-1.elasticmapreduce.amazonaws.com/

Output - Parameters

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AWSAccessKeyId=C99F5C7EE00F1EXAMPLE
Action=RunJobFlow
AmiVersion=latest
ContentType=JSON
Instances.Ec2KeyName=my-key
Instances.InstanceGroups.member.1.BidPrice=0.06
Instances.InstanceGroups.member.1.InstanceCount=1
Instances.InstanceGroups.member.1.InstanceRole=MASTER
Instances.InstanceGroups.member.1.InstanceType=m1.small
Instances.InstanceGroups.member.1.Market=SPOT
Instances.InstanceGroups.member.1.Name=Master Instance Group
Instances.InstanceGroups.member.2.BidPrice=0.06
Instances.InstanceGroups.member.2.InstanceCount=2
Instances.InstanceGroups.member.2.InstanceRole=CORE
Instances.InstanceGroups.member.2.InstanceType=m1.small
Instances.InstanceGroups.member.2.Market=SPOT
Instances.InstanceGroups.member.2.Name=Core Instance Group
Instances.KeepJobFlowAliveWhenNoSteps=false
Instances.TerminationProtected=false
LogUri=s3n://my-bucket/hadoop/
Name=Test custom JAR
Signature=wRJJpbGJBTsm4dkAoCBzthsLriWoVwY9igX+rSp47dI=
SignatureMethod=HmacSHA256
SignatureVersion=2
Steps.member.1.ActionOnFailure=CANCEL_AND_WAIT
Steps.member.1.HadoopJarStep.Args.member.1=s3n://elasticmapreduce/samples/cloudburst/input/s_suis.br
Steps.member.1.HadoopJarStep.Args.member.10=24
Steps.member.1.HadoopJarStep.Args.member.11=24
Steps.member.1.HadoopJarStep.Args.member.12=128
Steps.member.1.HadoopJarStep.Args.member.13=16
Steps.member.1.HadoopJarStep.Args.member.2=s3n://elasticmapreduce/samples/cloudburst/input/100k.br
Steps.member.1.HadoopJarStep.Args.member.3=s3n://my-bucket/cloud
Steps.member.1.HadoopJarStep.Args.member.4=36
Steps.member.1.HadoopJarStep.Args.member.5=3
Steps.member.1.HadoopJarStep.Args.member.6=0
Steps.member.1.HadoopJarStep.Args.member.7=1
Steps.member.1.HadoopJarStep.Args.member.8=240
Steps.member.1.HadoopJarStep.Args.member.9=48
Steps.member.1.HadoopJarStep.Jar=s3n://elasticmapreduce/samples/cloudburst/cloudburst.jar
Steps.member.1.Name=Example Jar Step
Timestamp=2013-05-16T00:10:56+00:00
VisibleToAllUsers=false

Output - Headers

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Host: us-east-1.elasticmapreduce.amazonaws.com:443
User-Agent: ruby-client
x-amzn-RequestId: 4e95ac98-20db-445f-b8ad-883f26b10007

Output - Non-verbose output

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Created job flow j-NRW49YLR1JJEN

API Request

Example API Request

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https://us-east-1.elasticmapreduce.amazonaws.com/
?Action=RunJobFlow
&Name=Test custom JAR
&Instances.Ec2KeyName=my-key
&Instances.InstanceGroups.member.1.Name=Master Instance Group
&Instances.InstanceGroups.member.1.InstanceRole=MASTER
&Instances.InstanceGroups.member.1.InstanceType=m1.small
&Instances.InstanceGroups.member.1.InstanceCount=1
&Instances.InstanceGroups.member.1.Market=SPOT
&Instances.InstanceGroups.member.1.BidPrice=0.06
&Instances.InstanceGroups.member.2.Name=Core Instance Group
&Instances.InstanceGroups.member.2.InstanceRole=CORE
&Instances.InstanceGroups.member.2.InstanceType=m1.small
&Instances.InstanceGroups.member.2.InstanceCount=2
&Instances.InstanceGroups.member.2.Market=SPOT
&Instances.InstanceGroups.member.2.BidPrice=0.06
&Instances.KeepJobFlowAliveWhenNoSteps=false
&Instances.TerminationProtected=false
&Steps.member.1.Name=Example Jar Step
&Steps.member.1.ActionOnFailure=CANCEL_AND_WAIT
&Steps.member.1.HadoopJarStep.Jar=s3n://elasticmapreduce/samples/cloudburst/cloudburst.jar
&Steps.member.1.HadoopJarStep.Args.member.1=s3n://elasticmapreduce/samples/cloudburst/input/s_suis.br
&Steps.member.1.HadoopJarStep.Args.member.2=s3n://elasticmapreduce/samples/cloudburst/input/100k.br
&Steps.member.1.HadoopJarStep.Args.member.3=s3n://my-bucket/cloud
&Steps.member.1.HadoopJarStep.Args.member.4=36
&Steps.member.1.HadoopJarStep.Args.member.5=3
&Steps.member.1.HadoopJarStep.Args.member.6=0
&Steps.member.1.HadoopJarStep.Args.member.7=1
&Steps.member.1.HadoopJarStep.Args.member.8=240
&Steps.member.1.HadoopJarStep.Args.member.9=48
&Steps.member.1.HadoopJarStep.Args.member.10=24
&Steps.member.1.HadoopJarStep.Args.member.11=24
&Steps.member.1.HadoopJarStep.Args.member.12=128
&Steps.member.1.HadoopJarStep.Args.member.13=16
&LogUri=s3n://my-bucket/hadoop/
&AmiVersion=latest
&VisibleToAllUsers=false
&*AUTHPARAMS*

AWS CLI

Console - user@hostname ~ $

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aws --region us-east-1 emr \
run-job-flow \
--name "Test custom JAR" \
--instances "{
    \"ec_2_key_name\": \"my-key\",
    \"instance_groups\": [
        {
            \"name\": \"Master Instance Group\",
            \"instance_role\": \"MASTER\",
            \"instance_type\": \"m1.small\",
            \"instance_count\": 1,
            \"market\": \"SPOT\",
            \"bid_price\": \"0.06\"
        },
        {
            \"name\": \"Core Instance Group\",
            \"instance_role\": \"CORE\",
            \"instance_type\": \"m1.small\",
            \"instance_count\": 2,
            \"market\": \"SPOT\",
            \"bid_price\": \"0.06\"
        }
    ],
    \"keep_job_flow_alive_when_no_steps\": false,
    \"termination_protected\": false
}" \
--steps "[
    {
        \"name\": \"Example Jar Step\",
        \"action_on_failure\": \"CANCEL_AND_WAIT\",
        \"hadoop_jar_step\": {
            \"jar\": \"s3n://elasticmapreduce/samples/cloudburst/cloudburst.jar\",
            \"args\": [
                \"s3n://elasticmapreduce/samples/cloudburst/input/s_suis.br\",
                \"s3n://elasticmapreduce/samples/cloudburst/input/100k.br\",
                \"s3n://my-bucket/cloud\",
                \"36\",
                \"3\",
                \"0\",
                \"1\",
                \"240\",
                \"48\",
                \"24\",
                \"24\",
                \"128\",
                \"16\"
            ]
        }
    }
]" \
--log-uri "s3n://my-bucket/hadoop/" \
--ami-version "latest"

Output

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{
    "ResponseMetadata": {
        "RequestId": "a2a9fe89-82e5-4bd6-be65-f243e37826cb"
    }, 
    "JobFlowId": "j-8VY74ZRDWZ7O8"
}

Resources

Parts in this series

Comments