Elasticsearch version upgrade

Current Version

• Elastic Server: 6.8.1
• Elastic Client version(OSDU Indexer service): 6.6.1

Proposed Version upgrade

• Elastic Server: 7
• Elastic Client version(OSDU Indexer service): 7

we need to upgrade the client and elastic server version, this would require the following changes...

• Update the Indexer service, code change + lib version upgrade.
• Upgraded Elastic server in all clouds(AWS, Azure, Google, and IBM..etc).

Updates:

• MRs for Indexer and Search service changes are created and published
• New version of Elastic Search JDK 7.8.1

Important:

CSPs needs to plan migration of indexes on a new version of Elastic. There are several options:

• Move indexes from instance Elastic 6 to instance of Elastic 7
• Reload data
• Do reindex