An Ambari Service for Hue
Ambari service for easily installing and managing Hue on HDP cluster.
Authors:
- Kyle Joe: Hue Install/Config/Start/Stop via Ambari
Version
- Hue v3.11.0+
- Ambari v2.4.0+
Setup
Deploy Hue on existing cluster
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(Optional) To see Hue metrics in Ambari, login to Ambari (admin/admin) and start Ambari Metrics service http://$AMBARI_HOST:8080
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To download the Hue service folder, run below
VERSION=`hdp-select status hadoop-client | sed 's/hadoop-client - \([0-9]\.[0-9]\).*/\1/'` rm -rf /var/lib/ambari-server/resources/stacks/HDP/$VERSION/services/HUE sudo git clone https://github.com/EsharEditor/ambari-hue-service.git /var/lib/ambari-server/resources/stacks/HDP/$VERSION/services/HUE -
Restart Ambari
service ambari-server restart -
Then you can click on 'Add Service' from the 'Actions' dropdown menu in the bottom left of the Ambari dashboard:
On bottom left -> Actions -> Add service -> check Hue server -> Next -> Next -> Change any config you like (e.g. install dir, port) -> Next -> Deploy
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Also ensure that the install location you are choosing (/usr/local/hue by default) does not exist
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On successful deployment you will see the Hue service as part of Ambari stack and will be able to start/stop the service from here:
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You can see the parameters you configured under 'Configs' tab
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One benefit to wrapping the component in Ambari service is that you can now monitor/manage this service remotely via REST API
export SERVICE=HUE export PASSWORD=admin export AMBARI_HOST=localhost export CLUSTER=DCenter
get service status
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X GET http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE
start service
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start $SERVICE via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE
stop service
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Stop $SERVICE via REST"}, "Body": {"ServiceInfo": {"state": "INSTALLED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE
#### Configuring Cluster and HUE
Hue uses a configuration file to understand information about Hadoop cluster and where to connect to. We’ll need to configure our Hadoop cluster to accept connections from HUE, and add our cluster information to the HUE configuration file. We’ll need to reconfigure our HDFS, Hive (WebHcatalog), and Oozie services to take advantage of HUE’s features.[tutorials from Hue](http://gethue.com/hadoop-hue-3-on-hdp-installation-tutorial/?replytocom=50032)
- http://gethue.com/hadoop-hue-3-on-hdp-installation-tutorial/?replytocom=50032
#### Hue Service Action
- UserSync: synchronize users from the current system or Ldap server
- DatabaseSync: synchronize metastore from SQLite
#### Use Hue
- The Hue webUI login page should come up at the below link:
http://$HUE_HOSTNAME:8888
#### Remove service
- To remove the Hue service:
- Stop the service via Ambari
- Unregister the service by running below from Ambari node
export SERVICE=HUE export PASSWORD=admin export AMBARI_HOST=localhost
detect name of cluster
output=curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' http://$AMBARI_HOST:8080/api/v1/clusters
CLUSTER=echo $output | sed -n 's/.*"cluster_name" : "\([^\"]*\)".*/\1/p'
unregister service from ambari
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X DELETE http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE
if above errors out, run below first to fully stop the service
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Stop $SERVICE via REST"}, "Body": {"ServiceInfo": {"state": "INSTALLED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE
- Remove artifacts
rm -rf /usr/local/hue* rm -rf /var/log/hue rm -rf /var/run/hue rm /usr/hdp/current/hadoop-client/lib/hue-plugins-3.11.0-SNAPSHOT.jar