This initialization action installs Apache Livy on a master node within a Google Cloud Dataproc cluster.

⚠️ NOTICE: See best practices of using initialization actions in production.

You can use this initialization action to create a new Dataproc cluster with Livy installed:

1. Use the gcloud command to create a new cluster with this initialization action.

   REGION=<region>
   CLUSTER_NAME=<cluster_name>
   gcloud dataproc clusters create ${CLUSTER_NAME} \
       --region ${REGION} \
       --initialization-actions gs://goog-dataproc-initialization-actions-${REGION}/livy/livy.sh

2. To change installed Livy version, use livy-version metadata value:

   REGION=<region>
   CLUSTER_NAME=<cluster_name>
   gcloud dataproc clusters create ${CLUSTER_NAME} \
       --region ${REGION} \
       --initialization-actions gs://goog-dataproc-initialization-actions-${REGION}/livy/livy.sh \
       --metadata livy-version=0.7.0

3. To change version of scala against which livy is linked, use scala-version metadata value:

   REGION=<region>
   CLUSTER_NAME=<cluster_name>
   gcloud dataproc clusters create ${CLUSTER_NAME} \
       --region ${REGION} \
       --initialization-actions gs://goog-dataproc-initialization-actions-${REGION}/livy/livy.sh \
       --metadata scala-version=2.12

4. To change timeout for Livy session, use livy-timeout-session metadata value:

   REGION=<region>
   CLUSTER_NAME=<cluster_name>
   gcloud dataproc clusters create ${CLUSTER_NAME} \
       --region ${REGION} \
       --initialization-actions gs://goog-dataproc-initialization-actions-${REGION}/livy/livy.sh \
       --metadata livy-timeout-session='3h'

5. Once the cluster has been created, Livy is configured to run on port 8998 on the master node in a Dataproc cluster.

6. To learn about how to use Livy read the documentation for the Rest API