使用 Amazon SDK 描述 CloudWatch 告警的历史记录 - Amazon CloudWatch
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使用 Amazon SDK 描述 CloudWatch 告警的历史记录

以下代码示例展示如何描述 Amazon CloudWatch 告警的历史记录。

操作示例是大型程序的代码摘录,必须在上下文中运行。在以下代码示例中,您可以查看此操作的上下文:

.NET
Amazon SDK for .NET
注意

在 GitHub 上查看更多内容。在 Amazon 代码示例存储库中查找完整示例,了解如何进行设置和运行。

/// <summary> /// Describe the history of an alarm for a number of days in the past. /// </summary> /// <param name="alarmName">The name of the alarm.</param> /// <param name="historyDays">The number of days in the past.</param> /// <returns>The list of alarm history data.</returns> public async Task<List<AlarmHistoryItem>> DescribeAlarmHistory(string alarmName, int historyDays) { List<AlarmHistoryItem> alarmHistory = new List<AlarmHistoryItem>(); var paginatedAlarmHistory = _amazonCloudWatch.Paginators.DescribeAlarmHistory( new DescribeAlarmHistoryRequest() { AlarmName = alarmName, EndDateUtc = DateTime.UtcNow, HistoryItemType = HistoryItemType.StateUpdate, StartDateUtc = DateTime.UtcNow.AddDays(-historyDays) }); await foreach (var data in paginatedAlarmHistory.AlarmHistoryItems) { alarmHistory.Add(data); } return alarmHistory; }
  • 有关 API 详细信息,请参阅《Amazon SDK for .NET API 参考》中的 DescribeAlarmHistory

CLI
Amazon CLI

检索警报的历史记录

以下示例使用 describe-alarm-history 命令检索名为“myalarm”的 Amazon CloudWatch 警报的历史记录:

aws cloudwatch describe-alarm-history --alarm-name "myalarm" --history-item-type StateUpdate

输出:

{ "AlarmHistoryItems": [ { "Timestamp": "2014-04-09T18:59:06.442Z", "HistoryItemType": "StateUpdate", "AlarmName": "myalarm", "HistoryData": "{\"version\":\"1.0\",\"oldState\":{\"stateValue\":\"ALARM\",\"stateReason\":\"testing purposes\"},\"newState\":{\"stateValue\":\"OK\",\"stateReason\":\"Threshold Crossed: 2 datapoints were not greater than the threshold (70.0). The most recent datapoints: [38.958, 40.292].\",\"stateReasonData\":{\"version\":\"1.0\",\"queryDate\":\"2014-04-09T18:59:06.419+0000\",\"startDate\":\"2014-04-09T18:44:00.000+0000\",\"statistic\":\"Average\",\"period\":300,\"recentDatapoints\":[38.958,40.292],\"threshold\":70.0}}}", "HistorySummary": "Alarm updated from ALARM to OK" }, { "Timestamp": "2014-04-09T18:59:05.805Z", "HistoryItemType": "StateUpdate", "AlarmName": "myalarm", "HistoryData": "{\"version\":\"1.0\",\"oldState\":{\"stateValue\":\"OK\",\"stateReason\":\"Threshold Crossed: 2 datapoints were not greater than the threshold (70.0). The most recent datapoints: [38.839999999999996, 39.714].\",\"stateReasonData\":{\"version\":\"1.0\",\"queryDate\":\"2014-03-11T22:45:41.569+0000\",\"startDate\":\"2014-03-11T22:30:00.000+0000\",\"statistic\":\"Average\",\"period\":300,\"recentDatapoints\":[38.839999999999996,39.714],\"threshold\":70.0}},\"newState\":{\"stateValue\":\"ALARM\",\"stateReason\":\"testing purposes\"}}", "HistorySummary": "Alarm updated from OK to ALARM" } ] }
  • 有关 API 详细信息,请参阅《Amazon CLI Command Reference》中的 DescribeAlarmHistory

Java
SDK for Java 2.x
注意

查看 GitHub,了解更多信息。在 Amazon 代码示例存储库中查找完整示例,了解如何进行设置和运行。

public static void getAlarmHistory(CloudWatchClient cw, String fileName, String date) { try { // Read values from the JSON file. JsonParser parser = new JsonFactory().createParser(new File(fileName)); com.fasterxml.jackson.databind.JsonNode rootNode = new ObjectMapper().readTree(parser); String alarmName = rootNode.findValue("exampleAlarmName").asText(); Instant start = Instant.parse(date); Instant endDate = Instant.now(); DescribeAlarmHistoryRequest historyRequest = DescribeAlarmHistoryRequest.builder() .startDate(start) .endDate(endDate) .alarmName(alarmName) .historyItemType(HistoryItemType.ACTION) .build(); DescribeAlarmHistoryResponse response = cw.describeAlarmHistory(historyRequest); List<AlarmHistoryItem> historyItems = response.alarmHistoryItems(); if (historyItems.isEmpty()) { System.out.println("No alarm history data found for " + alarmName + "."); } else { for (AlarmHistoryItem item : historyItems) { System.out.println("History summary: " + item.historySummary()); System.out.println("Time stamp: " + item.timestamp()); } } } catch (CloudWatchException | IOException e) { System.err.println(e.getMessage()); System.exit(1); } }
  • 有关 API 详细信息,请参阅《Amazon SDK for Java 2.x API 参考》中的 DescribeAlarmHistory

Kotlin
适用于 Kotlin 的 SDK
注意

查看 GitHub,了解更多信息。在 Amazon 代码示例存储库中查找完整示例,了解如何进行设置和运行。

suspend fun getAlarmHistory(fileName: String, date: String) { // Read values from the JSON file. val parser = JsonFactory().createParser(File(fileName)) val rootNode = ObjectMapper().readTree<JsonNode>(parser) val alarmNameVal = rootNode.findValue("exampleAlarmName").asText() val start = Instant.parse(date) val endDateVal = Instant.now() val historyRequest = DescribeAlarmHistoryRequest { startDate = aws.smithy.kotlin.runtime.time.Instant(start) endDate = aws.smithy.kotlin.runtime.time.Instant(endDateVal) alarmName = alarmNameVal historyItemType = HistoryItemType.Action } CloudWatchClient { credentialsProvider = EnvironmentCredentialsProvider(); region = "us-east-1" }.use { cwClient -> val response = cwClient.describeAlarmHistory(historyRequest) val historyItems = response.alarmHistoryItems if (historyItems != null) { if (historyItems.isEmpty()) { println("No alarm history data found for $alarmNameVal.") } else { for (item in historyItems) { println("History summary ${item.historySummary}") println("Time stamp: ${item.timestamp}") } } } } }

有关 Amazon SDK 开发人员指南和代码示例的完整列表,请参阅 将 CloudWatch 与 Amazon SDK 结合使用。本主题还包括有关入门的信息以及有关先前的 SDK 版本的详细信息。