availabilityType

'Availability type of an Instance. Defaults to REGIONAL for both primary and read instances. Note that primary and read instances can have different availability types. Primary instances can be either ZONAL or REGIONAL. Read Pool instances can also be either ZONAL or REGIONAL. Read pools of size 1 can only have zonal availability. Read pools with a node count of 2 or more can have regional availability (nodes are present in 2 or more zones in a region). Possible values are: AVAILABILITY_TYPE_UNSPECIFIED, ZONAL, REGIONAL.' Possible values are: AVAILABILITY_TYPE_UNSPECIFIED, ZONAL, REGIONAL.