# "Custom Rollover" index name in ILM policy configuration

**URL:** <https://discuss.elastic.co/t/custom-rollover-index-name-in-ilm-policy-configuration/179003>\
**Category:** Elasticsearch\
**Tags:** ilm-index-lifecycle-management\
**Created:** [April 30, 2019, 2:47am UTC](https://discuss.elastic.co/t/custom-rollover-index-name-in-ilm-policy-configuration/179003 "2019-04-30T02:47:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Hitesh\_Baldaniya1](https://avatars.discourse-cdn.com/v4/letter/h/45deac/32.png) [@Hitesh\_Baldaniya1](https://discuss.elastic.co/u/Hitesh_Baldaniya1)\
**Post date:** [April 30, 2019, 2:47am UTC](https://discuss.elastic.co/t/custom-rollover-index-name-in-ilm-policy-configuration/179003/1 "2019-04-30T02:47:28Z")

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Hi Team,

I wanted to know if there is any way where I can specify the roll\_over index name in the ILM policy. I see only condition parameter supported.

```
"logs-hotwarm-policy" : {
  "version" : 2,
  "modified_date" : "xxxx-xx-xxT12:18:03.706Z",
  "policy" : {
    "phases" : {
      "hot" : {
        "min_age" : "0ms",
        "actions" : {
         "rollover" : {
            "max_age" : "30d"
          },
          "set_priority" : {
            "priority" : 100
          }
        }
      },
      "warm" : {
        "min_age" : "1d",
        "actions" : {
          "allocate" : {
            "number_of_replicas" : 1,
            "include" : { },
            "exclude" : { },
            "require" : { }
          },
          "forcemerge" : {
            "max_num_segments" : 1
          },
          "readonly" : { },
          "set_priority" : {
            "priority" : 75
          },
          "shrink" : {
            "number_of_shards" : 1
          }
        }
      }
   }
}

```

}

I have the case, where I want to keep all the logs of the last 30 days into the "active" alias. Which I will be able to do with date-index-pattern ingest pipeline to create index based on incoming document field value so the index name will be like "logs-2019-04". And all the active "logs-\*" indexes will point to "active-logs" alias.

So, for the next month the logs will automatically going to create new index based on ingest pipeline. Now I want to shift my "active-logs" alias to next month's index which will be like "logs-2019-05" and one more alias of "inactive-logs" which is going to point to "logs-2019-04".

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**Author:** ![dakrone](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dakrone/32/23351_2.png) [@dakrone](https://discuss.elastic.co/u/dakrone)\
**Post date:** [April 30, 2019, 2:52pm UTC](https://discuss.elastic.co/t/custom-rollover-index-name-in-ilm-policy-configuration/179003/2 "2019-04-30T14:52:24Z")

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Hi Hitesh,

You can control the name of the rolled over index by using index date math when you first create the index, for example:

```auto
// This is an escaped version of "/<logs-{now/m{yyyy-MM}}-1>"
PUT /%3Clogs-%7Bnow%2Fm%7Byyyy-MM%7D%7D-1%3E
{
  "aliases": {
    "your-alias":{
      "is_write_index": true
    }
  }
}

```

So it will create `logs-2019-04-1` and then `logs-2019-05-000002`, then `logs-2019-06-000003` (etc, assuming you roll over every month) when ILM rolls over the index.

You can see an example at [https://www.elastic.co/guide/en/elasticsearch/reference/7.x/indices-rollover-index.html#\_using\_date\_math\_with\_the\_rollover\_api](https://www.elastic.co/guide/en/elasticsearch/reference/7.x/indices-rollover-index.html#_using_date_math_with_the_rollover_api)

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<div class="post-metadata">

**Author:** ![Hitesh\_Baldaniya1](https://avatars.discourse-cdn.com/v4/letter/h/45deac/32.png) [@Hitesh\_Baldaniya1](https://discuss.elastic.co/u/Hitesh_Baldaniya1)\
**Post date:** [April 30, 2019, 2:55pm UTC](https://discuss.elastic.co/t/custom-rollover-index-name-in-ilm-policy-configuration/179003/3 "2019-04-30T14:55:44Z")

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thanks @dakrone. I will definately check this.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [May 28, 2019, 2:55pm UTC](https://discuss.elastic.co/t/custom-rollover-index-name-in-ilm-policy-configuration/179003/4 "2019-05-28T14:55:50Z")

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