[role="xpack"]
[testenv="basic"]
[[ilm-put-lifecycle]]
=== Create lifecycle policy API
++++
<titleabbrev>Create policy</titleabbrev>
++++

Creates or updates lifecycle policy. See <<ilm-policy-definition,Policy phases and actions>>
for definitions of policy components.

==== Request

`PUT _ilm/policy/<policy_id>`

==== Description

Creates a lifecycle policy. If the specified policy exists, the policy is
replaced and the policy version is incremented.

NOTE: Only the latest version of the policy is stored, you cannot revert to
previous versions.

==== Path Parameters

`policy` (required)::
  (string) Identifier for the policy.

==== Request Parameters

include::{docdir}/rest-api/common-parms.asciidoc[tag=timeoutparms]

==== Authorization

You must have the `manage_ilm` cluster privilege to use this API. You must
also have the `manage` index privilege on all indices being managed by `policy`.
All operations executed by {ilm} for a policy are executed as the user that
put the latest version of a policy.
For more information, see {stack-ov}/security-privileges.html[Security Privileges].

==== Examples

The following example creates a new policy named `my_policy`:

[source,console]
--------------------------------------------------
PUT _ilm/policy/my_policy
{
  "policy": {
    "phases": {
      "warm": {
        "min_age": "10d",
        "actions": {
          "forcemerge": {
            "max_num_segments": 1
          }
        }
      },
      "delete": {
        "min_age": "30d",
        "actions": {
          "delete": {}
        }
      }
    }
  }
}
--------------------------------------------------

If the request succeeds, you receive the following result:

[source,console-result]
----
{
  "acknowledged": true
}
----