GET /_migration/deprecations

GET /<target>/_migration/deprecations

You can use the following settings to control the behavior of the deprecation info API:

deprecation.skip_deprecated_settings (Dynamic) Defaults to an empty list. Set to a list of setting names to be ignored by the deprecation info API. Any deprecations related to settings in this list will not be returned by the API. Simple wildcard matching is supported.

To see the list of offenders in your cluster, submit a GET request to the _migration/deprecations endpoint:

GET /_migration/deprecations

Example response:

{
  "cluster_settings" : [
    {
      "level" : "critical",
      "message" : "Cluster name cannot contain ':'",
      "url" : "https://www.elastic.co/guide/en/elasticsearch/reference/7.0/breaking-changes-7.0.html#_literal_literal_is_no_longer_allowed_in_cluster_name",
      "details" : "This cluster is named [mycompany:logging], which contains the illegal character ':'."
    }
  ],
  "node_settings" : [ ],
  "index_settings" : {
    "logs:apache" : [
      {
        "level" : "warning",
        "message" : "Index name cannot contain ':'",
        "url" : "https://www.elastic.co/guide/en/elasticsearch/reference/7.0/breaking-changes-7.0.html#_literal_literal_is_no_longer_allowed_in_index_name",
        "details" : "This index is named [logs:apache], which contains the illegal character ':'."
      }
    ]
  },
  "ml_settings" : [ ]
}

The response breaks down all the specific forward-incompatible settings that you should resolve before upgrading your cluster. Any offending settings are represented as a deprecation warning.

The following is an example deprecation warning:

{
  "level" : "warning",
  "message" : "This is the generic descriptive message of the breaking change",
  "url" : "https://www.elastic.co/guide/en/elasticsearch/reference/6.0/breaking_60_indices_changes.html",
  "details" : "more information, like which nodes, indices, or settings are to blame"
}

As is shown, there is a level property that describes the significance of the issue.

The message property and the optional details property provide descriptive information about the deprecation warning. The url property provides a link to the Breaking Changes Documentation, where you can find more information about this change.

Any cluster-level deprecation warnings can be found under the cluster_settings key. Similarly, any node-level warnings are found under node_settings. Since only a select subset of your nodes might incorporate these settings, it is important to read the details section for more information about which nodes are affected. Index warnings are sectioned off per index and can be filtered using an index-pattern in the query. This section includes warnings for the backing indices of data streams specified in the request path. Machine Learning related deprecation warnings can be found under the ml_settings key.

The following example request shows only index-level deprecations of all logstash-* indices:

GET /logstash-*/_migration/deprecations