ILM policies conditions are getting exceeded to rollover the indices

Elastic Stack Kibana
1

Hello Elastic Team,

I have applied ILM policy(test) to my Index(timeseries) where I have defined ONLY hot phase with conditions max_age(15m) & max_docs(5).
My index is getting rollover but not following/matching above conditions strictly.
It always exceeds the max_age & max_docs with indices name as 00001,00002,00003...so on
Expected behavior: Any of the conditions(either max_age or max_docs) should match and once it matched it should rollover the index.

#==> ILM policy <============================
PUT _ilm/policy/test
{
  "policy": {
    "phases": {
      "hot": {
        "min_age": "0ms",
        "actions": {
          "rollover": {
            "max_age": "15m",
            "max_docs":5
          },
          "set_priority": {
            "priority": 100
          }
        }
      }
    }
  }
}
#==> Index Template <=========================
PUT _index_template/timeseries_template
{
  "index_patterns": ["timeseries-*"], 
  "template":{
    "settings": {
      "number_of_shards": 1,
      "number_of_replicas": 1,
      "index.lifecycle.name": "test",      
      "index.lifecycle.rollover_alias": "timeseries"
  }
}
}
#==> Write aliases<===========================

PUT timeseries-000001
{
  "aliases": {
    "timeseries": {
      "is_write_index": true
    }
  }
}
#==> To check the ILM actions<=================

GET timeseries-*/_ilm/explain

#==> sending data into Index <=================
POST timeseries/_doc
{
"name":"mangesh",
"birthdate":"1993-06-01"
}

POST timeseries/_doc
{
"name":"pankaj",
"birthdate":"1994-10-01"
}
==============================================

Is there any default minimum value for the fields max_age & max_docs in elasticsearch? If not then please suggest on this.
Help me to correct if there is anything wrong with my queries.

Thank you!

2

Welcome to our community! :smiley:

ILM runs a check every 10 minutes, by default, to see if indices need actions applied to them. Your conditions are too small to be able to accurately rollover unfortunately.

3

Understood. Thank you!

4

Can you please tell me , what if I want to rollover my indices on monthly basis.
I want to generate rollover indices for SEPT...OCT...NOV...DEC
I know we can use "max_age":"30d" for that , but it will create problem for the months having 31 days & 28 days in a year.

 "actions": {
          "rollover": {
            "max_age": "(Monthly)",
5

ILM doesn't support that type of date math, you might want to make a feature request for it though.

6

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