The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using a simple programming model.
This charm deploys version 2.7.3 of the ResourceManager component from Apache Bigtop.
This charm requires Juju 2.0 or greater. If Juju is not yet set up, please follow the getting-started instructions prior to deploying this charm.
This charm is intended to be deployed via one of the apache bigtop bundles. For example:
juju deploy hadoop-processing
This will deploy an Apache Bigtop cluster with this charm acting as the ResourceManager. More information about this deployment can be found in the bundle readme.
Charms can be deployed in environments with limited network access. To deploy in this environment, configure a Juju model with appropriate proxy and/or mirror options. See Configuring Models for more information.
Apache Bigtop charms provide extended status reporting to indicate when they are ready:
juju status
This is particularly useful when combined with watch to track the on-going progress of the deployment:
watch -n 2 juju status
The message column will provide information about a given unit's state. This charm is ready for use once the status message indicates that it is ready with nodemanagers.
This charm provides a smoke-test action that can be used to verify the application is functioning as expected. This action executes the ‘yarn’ smoke tests provided by Apache Bigtop and may take up to 10 minutes to complete. Run the action as follows:
juju run-action resourcemanager/0 smoke-test
Watch the progress of the smoke test actions with:
watch -n 2 juju show-action-status
Eventually, the action should settle to status: completed. If it reports status: failed, the application is not working as expected. Get more information about a specific smoke test with:
juju show-action-output <action-id>
This charm includes Hadoop command line and web utilities that can be used to verify information about the cluster.
Show the running nodes on the command line with the following:
juju run --application resourcemanager "su yarn -c 'yarn node -list'"
To access the Resource Manager web consoles, find the PUBLIC-ADDRESS of the resourcemanager application and expose it:
juju status resourcemanager juju expose resourcemanager
The YARN and Job History web interfaces will be available at the following URLs:
http://RESOURCEMANAGER_PUBLIC_IP:8088 http://RESOURCEMANAGER_PUBLIC_IP:19888
This charm provides several benchmarks to gauge the performance of the cluster. Each benchmark is an action that can be run with juju run-action:
$ juju actions resourcemanager
ACTION DESCRIPTION
mrbench Mapreduce benchmark for small jobs
nnbench Load test the NameNode hardware and configuration
smoke-test Run an Apache Bigtop smoke test.
teragen Generate data with teragen
terasort Runs teragen to generate sample data, and then runs terasort to sort that data
testdfsio DFS IO Testing
$ juju run-action resourcemanager/0 nnbench
Action queued with id: 55887b40-116c-4020-8b35-1e28a54cc622
$ juju show-action-output 55887b40-116c-4020-8b35-1e28a54cc622
results:
meta:
composite:
direction: asc
units: secs
value: "128"
start: 2016-02-04T14:55:39Z
stop: 2016-02-04T14:57:47Z
results:
raw: '{"BAD_ID": "0", "FILE: Number of read operations": "0", "Reduce input groups":
"8", "Reduce input records": "95", "Map output bytes": "1823", "Map input records":
"12", "Combine input records": "0", "HDFS: Number of bytes read": "18635", "FILE:
Number of bytes written": "32999982", "HDFS: Number of write operations": "330",
"Combine output records": "0", "Total committed heap usage (bytes)": "3144749056",
"Bytes Written": "164", "WRONG_LENGTH": "0", "Failed Shuffles": "0", "FILE:
Number of bytes read": "27879457", "WRONG_MAP": "0", "Spilled Records": "190",
"Merged Map outputs": "72", "HDFS: Number of large read operations": "0", "Reduce
shuffle bytes": "2445", "FILE: Number of large read operations": "0", "Map output
materialized bytes": "2445", "IO_ERROR": "0", "CONNECTION": "0", "HDFS: Number
of read operations": "567", "Map output records": "95", "Reduce output records":
"8", "WRONG_REDUCE": "0", "HDFS: Number of bytes written": "27412", "GC time
elapsed (ms)": "603", "Input split bytes": "1610", "Shuffled Maps ": "72", "FILE:
Number of write operations": "0", "Bytes Read": "1490"}'
status: completed
timing:
completed: 2016-02-04 14:57:48 +0000 UTC
enqueued: 2016-02-04 14:55:14 +0000 UTC
started: 2016-02-04 14:55:27 +0000 UTC
Apache Bigtop tracks issues using JIRA (Apache account required). File an issue for this charm at:
https://issues.apache.org/jira/secure/CreateIssue!default.jspa
Ensure Bigtop is selected as the project. Typically, charm issues are filed in the deployment component with the latest stable release selected as the affected version. Any uncertain fields may be left blank.