[OAK-8593] Enable a transient cluster-node to connect as invisible to oak discovery

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.20.0
• Component/s: documentmk
• Assignee: Amit Jain
• Reporter: Amit Jain
• Created: 05/Sep/19 08:51
• Updated: 25/Nov/19 06:28
• Resolved: 26/Sep/19 10:51

Description

Currently, if Oak is initialized with read-write access to the DocumentStore (Mongo/RDB) e.g through oak-run, it is made visible to upper layers (e.g. sling discovery) via the oak discovery cluster view. This can cause problems in the actual cluster with the differing topology view and the capabilities advertised and in some circumstances being made a leader.

In an offline discussion with mreutegg and stefanegli it was decided that its best to expose a flag invisible in the cluserNodes collection/table with which these instances can connect and then these would be ignored by the oak discovery.