大家好，我是好學(xué)的小師弟，今天和大家討論下更新es索引生命周期策略后，策略何時(shí)對(duì)索引生效

結(jié)論:

若當(dāng)前索引已應(yīng)用策略A(舊)，更新完策略A后，新的策略A會(huì)立即對(duì)原來(lái)的已經(jīng)應(yīng)用該策略的索引生效；若當(dāng)前索引符合新策略A的生命周期變化條件，則會(huì)自動(dòng)進(jìn)入下一階段(hot-warm-cold-delete)

舉例:

比方說(shuō)原來(lái)策略是10g就滾動(dòng)索引，你現(xiàn)在索引大小為8G，不符合滾動(dòng)條件，但是你更新的策略為4G，那么更新策略完成后，等待一段時(shí)間(10分鐘左右)，索引即可完成滾動(dòng)，因?yàn)?G符合4g的滾動(dòng)條件

具體細(xì)節(jié):

1.幾個(gè)關(guān)鍵字段??

以下字段value均是時(shí)間戳，通過(guò)觀察三張圖里的這些時(shí)間戳，即可得出結(jié)論:更新后的策略對(duì)原來(lái)已經(jīng)應(yīng)用該策略的索引，立即生效

lifecycle_date_millis: 指的是索引創(chuàng)建的時(shí)間戳，這里的索引指的是一開始創(chuàng)建這個(gè)索引的時(shí)間，或者是滾動(dòng)后新索引的創(chuàng)建時(shí)間

phase_time_millis: 索引進(jìn)入當(dāng)前生命周期階段的時(shí)間戳，以毫秒為單位

action: 當(dāng)前生命周期階段執(zhí)行的操作，可能的值包括：complete、delete、rollover。

action_time_millis: 執(zhí)行當(dāng)前操作的時(shí)間戳，跟action字段對(duì)應(yīng)

step_time_millis: 執(zhí)行當(dāng)前子步驟的時(shí)間戳，跟step字段對(duì)應(yīng)

modified_date_in_millis: 索引生命周期策略的修改時(shí)間戳

2.更新完索引生命周期策略后，新策略已經(jīng)對(duì)索引生效，索引目前處于check policy狀態(tài)

{
	"indices": {
		"test_2023.03.21-000001": {
			"index": "test_2023.03.21-000001",
			"managed": true,
			"policy": "test",
			"lifecycle_date_millis": 1679394264357, //2023-03-21 18:24:24
			"age": "203.41d",
			"phase": "hot",
			"phase_time_millis": 1693479366940, //2023-08-31 18:56:06
			"action": "rollover",
			"action_time_millis": 1679394338025, //2023-03-21 18:25:38
			"step": "check-rollover-ready",
			"step_time_millis": 1693479366940, //2023-08-31 18:56:06
			"is_auto_retryable_error": true,
			"failed_step_retry_count": 2,
			"phase_execution": {
				"policy": "test",
				"phase_definition": {
					"min_age": "3ms",
					"actions": {
						"rollover": {
							"max_size": "4831838208b"
						},
						"set_priority": {
							"priority": 100
						}
					}
				},
				"version": 5,
				"modified_date_in_millis": 1696969009629 //2023-10-11 04:16:49
			}
		}
	}
}

3.更新完索引生命周期策略后，新策略已經(jīng)對(duì)索引生效，索引符合新的策略的滾動(dòng)條件，滾動(dòng)中

{
	"indices": {
		"test_2023.03.21-000001": {
			"index": "test_2023.03.21-000001",
			"managed": true,
			"policy": "test",
			"lifecycle_date_millis": 1679394264357, //2023-03-21 18:24:24
			"age": "203.41d",
			"phase": "hot",
			"phase_time_millis": 1693479366940, //2023-08-31 18:56:06
			"action": "rollover",
			"action_time_millis": 1679394338025, //2023-03-21 18:25:38
			"step": "attempt-rollover", //這里已經(jīng)開始嘗試滾動(dòng)
			"step_time_millis": 1696969116221, //2023-10-11 04:18:36
			"phase_execution": {
				"policy": "test",
				"phase_definition": {
					"min_age": "3ms",
					"actions": {
						"rollover": {
							"max_size": "4831838208b"   //這里已經(jīng)適配了最新的策略4.5G
						},
						"set_priority": {
							"priority": 100
						}
					}
				},
				"version": 5,
				"modified_date_in_millis": 1696969009629 //2023-10-11 04:16:49
			}
		}
	}
}

4.下面的是策略生效，索引滾動(dòng)完畢,已經(jīng)進(jìn)入warm階段

{
	"indices": {
		"test_2023.03.21-000001": {
			"index": "test_2023.03.21-000001",
			"managed": true,
			"policy": "test",
			"lifecycle_date_millis": 1696969219587, //2023-10-11 04:20:19
			"age": "13.12h",
			"phase": "warm",
			"phase_time_millis": 1696969755909, //2023-10-11 04:29:15
			"action": "complete",
			"action_time_millis": 1696972068230, //2023-10-11 05:07:48
			"step": "complete",
			"step_time_millis": 1696972068230, //2023-10-11 05:07:48
			"phase_execution": {
				"policy": "test",
				"phase_definition": {
					"min_age": "5ms",
					"actions": {
						"allocate": {
							"number_of_replicas": 0,
							"include": {},
							"exclude": {
								"box_type": "cold,hot"
							},
							"require": {
								"box_type": "warm"
							}
						},
						"forcemerge": {
							"max_num_segments": 1
						},
						"set_priority": {
							"priority": 50
						},
						"shrink": {
							"number_of_shards": 1
						}
					}
				},
				"version": 5,
				"modified_date_in_millis": 1696969009629 //2023-10-11 04:16:49
			}
		}
	}
}

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