Metadata Migration Tool
The Metadata Migration Tool migrates templates and indices in a specified snapshot of a source cluster to a target cluster. It parses the contents of the snapshot to extract the settings and configuration of the templates, aliases, and indices in the snapshot. Then it migrates the settings and configuration to the target cluster. The user can apply allowlists to filter which templates and indices are migrated. If a template or index of the same name already exists on the target cluster, this tool doesn’t overwrite the existing one on the target. Instead, the tool leaves the pre-existing index and template settings as-is without modifications.
The tool also applies basic transformations to the template and index settings to handle upgrades between version-specific behavior. See the Metadata Migration Tool README
