创建策略

本文介绍索引生命周期创建策略。

curl -X PUT "localhost:9200/_ilm/policy/myl_policy?pretty" -H 'Content-Type: application/json' -d'
{
  "policy": {
    "phases": {
      "hot": {
        "actions": {
          "rollover": {
            "max_age": "7d",
            "max_size": "50G"
          }
        }
      },
      "warm": {
        "min_age": "30d",
        "actions": {
          "forcemerge": {
            "max_num_segments": 1
          },
          "shrink": {
            "number_of_shards": 1
          },
          "allocate": {
            "number_of_replicas": 2
          }
        }
      },
      "cold": {
        "min_age": "60d",
        "actions": {
          "allocate": {
            "require": {
              "type": "cold"
            }
          }
        }
      },
      "delete": {
        "min_age": "90d",
        "actions": {
          "delete": {}
        }
      }
    }
  }
}
'

这个策略包含4个阶段。

• 索引首先进入hot阶段，当7天或者索引达到50G将会触发roll_over。
• 再过30天，索引进入warm阶段，然后进行三个操作，增加副本数，forcemerge，减少分片数shrink。
• 60天后，进入cold阶段，数据分片会被迁移到cold node。
• 90天后，索引被删除。