Migration assistance API

The Migration Assistance API analyzes existing indices in the cluster and returns the information about indices that require some changes before the cluster can be upgraded to the next major version.

GET /_xpack/migration/assistance

GET /_xpack/migration/assistance/<index_name>

To see a list of indices that needs to be upgraded or reindexed, submit a GET request to the /_xpack/migration/assistance endpoint:

GET /_xpack/migration/assistance

A successful call returns a list of indices that need to be updated or reindexed:

{
  "indices" : {
    ".watches" : {
      "action_required" : "upgrade"
    },
    ".security" : {
      "action_required" : "upgrade"
    },
    "my_old_index": {
      "action_required" : "reindex"
    },
    "my_other_old_index": {
      "action_required" : "reindex"
    }
  }
}

To check a particular index or set of indices, specify this index name or mask as the last part of the /_xpack/migration/assistance/index_name endpoint:

GET /_xpack/migration/assistance/my_*

A successful call returns a list of indices that needs to be updated or reindexed and match the index specified on the endpoint:

{
  "indices" : {
    "my_old_index": {
      "action_required" : "reindex"
    },
    "my_other_old_index": {
      "action_required" : "reindex"
    }
  }
}