I am trying to deploy the Elasticsearch cluster on Azure. On the cluster settings page, I am able to select an existing Virtual network but none of the subsets appear.
A pane appears to select the subnet (tried creating new subnets in advance)
The Azure Marketplace constrains the available existing subnets to those that have a prefix size of /25 i.e. 128 addresses or more. The prefix size must be large enough to be able to accommodate the largest size cluster/deployment that the Marketplace offering can deploy, and the prefix size chosen is the smallest that meets this requirement. The ability to dynamically adjust the prefix size based on the cluster topology to be deployed is not possible.
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