HA Cluster

This is a source that takes one or more downstream sources, sends the same query to each, then merge the results before sending them upstream. Use it when you write the same data to multiple clusters for high availability.

TODO - talk about the config.

Fields that can be set at query time include:

Name	Data Type	Required	Description	Default	Example
dataSources	List	Optional	A means of overriding the configured data sources by, for example, selecting a subset of sources or different sources entirely.	null	[“s1”, “s2”]
dataSourceConfigs	List	Optional	An optional list of complete data source config nodes to execute downstream. This allows for custom configurations per source, e.g. maybe disable caching on one.	null	TODO
mergeAggregator	String	Optional	An optional override of the configured aggregator	null	max
primaryTimeout	String	Optional	An optional override of the configured primary timeout (i.e. how long to wait for the primary source when a secondary source has responded). In the TSDB duration format.	null	10s
secondaryTimeout	String	Optional	An optional override of the configured secondary timeout (i.e. how long to wait for at least one secondary source when the primary source has responded). In the TSDB duration format.	null	5s