elastic search 自动删除index policy

当然, 可以使用rest接口方式,进行指定index 删除操作, 但是使用自带的 policy , 可以多余的crontab等操作

创建policy 后, 输入下面内容, 大意: 指定index 状态迁移, 并指定相应的 有效时长.
活动时间 15天, 冷数据时间 1天, 然后转入 删除状态(删除数据, 释放磁盘空间)

{
    "policy": {
        "description": "A simple default policy that changes the replica count between hot and cold states.",
        "default_state": "hot",
        "states": [
            {
                "name": "hot",
                "actions": [
                    {
                        "replica_count": {
                            "number_of_replicas": 5
                        }
                    }
                ],
                "transitions": [
                    {
                        "state_name": "cold",
                        "conditions": {
                            "min_index_age": "15d"
                        }
                    }
                ]
            },
            {
                "name": "cold",
                "actions": [
                    {
                        "replica_count": {
                            "number_of_replicas": 2
                        }
                    }
                ],
                "transitions": [
                    {
                        "state_name": "delete",
                        "conditions": {
                            "min_index_age": "1d"
                        }
                    }
                ]
            },
            {
                "name": "delete",
                "actions": [
                    {
                        "delete": {}
                    }
                ],
                "transitions": []
            }
        ],
        "ism_template": {
            "index_patterns": [
                "log-*"
            ]
        }
    }
}