We are using ElasticSearch 1.5.2 version on production. On daily basis we take backup of data on Amazon S3 using plugin https://github.com/elasticsearch/elasticsearch-cloud-aws#s3-repository.
We are moving form AWS to Google cloud so we need to take backup of data on GCS(Google Cloud Storage).
There is support of GCS in ElasticSearch 5.0.0.alpha4 version (Reference https://www.elastic.co/guide/en/elasticsearch/plugins/master/repository-gcs.html) But I am not able to find anything for ES 1.5.2 version.
Please let me know how we can take data backup in ES 1.5.2 on GCS(Google Cloud Storage).