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Deprecation info APIs

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Deprecation info APIs

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Use this API to check for deprecated configuration before performing a major version upgrade. You should run it on the the last minor version of the major version you are upgrading from, as earlier minor versions may not include all deprecations.

The deprecation API is to be used to retrieve information about different cluster, node, and index level settings that use deprecated features that will be removed or changed in the next major version.

Request

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GET /_migration/deprecations

GET /<index_name>/_migration/deprecations

Path parameters

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index_name: (Optional, string) Identifier for the index. It can be an index name or a wildcard expression. When you specify this parameter, only index-level deprecations for the specified indices are returned.

Examples

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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/7.7/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/7.7/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.

warning	You can upgrade directly, but you are using deprecated functionality which will not be available or behave differently in the next major version.
critical	You cannot upgrade without fixing this problem.

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. 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

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