migration_prefix

If the destination index is set to MIGRATION, Curator will reindex all selected indices one by one until they have all been reindexed. By configuring migration_prefix, a value can prepend each of those index names. For example, if I were reindexing index1, index2, and index3, and migration_prefix were set to new-, then the reindexed indices would be named new-index1, new-index2, and new-index3:

actions:
  1:
    description: >-
      Reindex index1, index2, and index3 with a prefix of new-, resulting in
      indices named new-index1, new-index2, and new-index3
    action: reindex
    options:
      wait_interval: 9
      max_wait: -1
      migration_prefix: new-
      request_body:
        source:
          index: ["index1", "index2", "index3"]
        dest:
          index: MIGRATION
    filters:
    - filtertype: none

migration_prefix can be used in conjunction with migration_suffix