CloudWatch 使用适用于 Ruby 的 SDK 的示例 - Amazon 适用于 Ruby 的 SDK
Amazon Web Services 文档中描述的 Amazon Web Services 服务或功能可能因区域而异。要查看适用于中国区域的差异,请参阅 中国的 Amazon Web Services 服务入门 (PDF)

本文属于机器翻译版本。若本译文内容与英语原文存在差异,则一律以英文原文为准。

CloudWatch 使用适用于 Ruby 的 SDK 的示例

以下代码示例向您展示了如何使用with来执行操作和实现常见场景 CloudWatch。 Amazon SDK for Ruby

操作是大型程序的代码摘录,必须在上下文中运行。您可以通过操作了解如何调用单个服务函数,还可以通过函数相关场景和跨服务示例的上下文查看操作。

场景 是展示如何通过在同一服务中调用多个函数来完成特定任务的代码示例。

每个示例都包含一个指向的链接 GitHub,您可以在其中找到有关如何在上下文中设置和运行代码的说明。

主题

操作

以下代码示例演示了如何使用 DescribeAlarms

适用于 Ruby 的 SDK
注意

还有更多相关信息 GitHub。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。

require "aws-sdk-cloudwatch" # Lists the names of available Amazon CloudWatch alarms. # # @param cloudwatch_client [Aws::CloudWatch::Client] # An initialized CloudWatch client. # @example # list_alarms(Aws::CloudWatch::Client.new(region: 'us-east-1')) def list_alarms(cloudwatch_client) response = cloudwatch_client.describe_alarms if response.metric_alarms.count.positive? response.metric_alarms.each do |alarm| puts alarm.alarm_name end else puts "No alarms found." end rescue StandardError => e puts "Error getting information about alarms: #{e.message}" end
  • 有关 API 的详细信息,请参阅 Amazon SDK for Ruby API 参考DescribeAlarms中的。

以下代码示例演示了如何使用 DescribeAlarmsForMetric

适用于 Ruby 的 SDK
注意

还有更多相关信息 GitHub。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。

# # @param cloudwatch_client [Aws::CloudWatch::Client] # An initialized CloudWatch client. # @example # describe_metric_alarms(Aws::CloudWatch::Client.new(region: 'us-east-1')) def describe_metric_alarms(cloudwatch_client) response = cloudwatch_client.describe_alarms if response.metric_alarms.count.positive? response.metric_alarms.each do |alarm| puts "-" * 16 puts "Name: " + alarm.alarm_name puts "State value: " + alarm.state_value puts "State reason: " + alarm.state_reason puts "Metric: " + alarm.metric_name puts "Namespace: " + alarm.namespace puts "Statistic: " + alarm.statistic puts "Period: " + alarm.period.to_s puts "Unit: " + alarm.unit.to_s puts "Eval. periods: " + alarm.evaluation_periods.to_s puts "Threshold: " + alarm.threshold.to_s puts "Comp. operator: " + alarm.comparison_operator if alarm.key?(:ok_actions) && alarm.ok_actions.count.positive? puts "OK actions:" alarm.ok_actions.each do |a| puts " " + a end end if alarm.key?(:alarm_actions) && alarm.alarm_actions.count.positive? puts "Alarm actions:" alarm.alarm_actions.each do |a| puts " " + a end end if alarm.key?(:insufficient_data_actions) && alarm.insufficient_data_actions.count.positive? puts "Insufficient data actions:" alarm.insufficient_data_actions.each do |a| puts " " + a end end puts "Dimensions:" if alarm.key?(:dimensions) && alarm.dimensions.count.positive? alarm.dimensions.each do |d| puts " Name: " + d.name + ", Value: " + d.value end else puts " None for this alarm." end end else puts "No alarms found." end rescue StandardError => e puts "Error getting information about alarms: #{e.message}" end # Example usage: def run_me region = "" # Print usage information and then stop. if ARGV[0] == "--help" || ARGV[0] == "-h" puts "Usage: ruby cw-ruby-example-show-alarms.rb REGION" puts "Example: ruby cw-ruby-example-show-alarms.rb us-east-1" exit 1 # If no values are specified at the command prompt, use these default values. elsif ARGV.count.zero? region = "us-east-1" # Otherwise, use the values as specified at the command prompt. else region = ARGV[0] end cloudwatch_client = Aws::CloudWatch::Client.new(region: region) puts "Available alarms:" describe_metric_alarms(cloudwatch_client) end run_me if $PROGRAM_NAME == __FILE__

以下代码示例演示了如何使用 DisableAlarmActions

适用于 Ruby 的 SDK
注意

还有更多相关信息 GitHub。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。

# Disables an alarm in Amazon CloudWatch. # # Prerequisites. # # - The alarm to disable. # # @param cloudwatch_client [Aws::CloudWatch::Client] # An initialized CloudWatch client. # @param alarm_name [String] The name of the alarm to disable. # @return [Boolean] true if the alarm was disabled; otherwise, false. # @example # exit 1 unless alarm_actions_disabled?( # Aws::CloudWatch::Client.new(region: 'us-east-1'), # 'ObjectsInBucket' # ) def alarm_actions_disabled?(cloudwatch_client, alarm_name) cloudwatch_client.disable_alarm_actions(alarm_names: [alarm_name]) return true rescue StandardError => e puts "Error disabling alarm actions: #{e.message}" return false end # Example usage: def run_me alarm_name = "ObjectsInBucket" alarm_description = "Objects exist in this bucket for more than 1 day." metric_name = "NumberOfObjects" # Notify this Amazon Simple Notification Service (Amazon SNS) topic when # the alarm transitions to the ALARM state. alarm_actions = ["arn:aws:sns:us-east-1:111111111111:Default_CloudWatch_Alarms_Topic"] namespace = "AWS/S3" statistic = "Average" dimensions = [ { name: "BucketName", value: "doc-example-bucket" }, { name: "StorageType", value: "AllStorageTypes" } ] period = 86_400 # Daily (24 hours * 60 minutes * 60 seconds = 86400 seconds). unit = "Count" evaluation_periods = 1 # More than one day. threshold = 1 # One object. comparison_operator = "GreaterThanThreshold" # More than one object. # Replace us-west-2 with the AWS Region you're using for Amazon CloudWatch. region = "us-east-1" cloudwatch_client = Aws::CloudWatch::Client.new(region: region) if alarm_created_or_updated?( cloudwatch_client, alarm_name, alarm_description, metric_name, alarm_actions, namespace, statistic, dimensions, period, unit, evaluation_periods, threshold, comparison_operator ) puts "Alarm '#{alarm_name}' created or updated." else puts "Could not create or update alarm '#{alarm_name}'." end if alarm_actions_disabled?(cloudwatch_client, alarm_name) puts "Alarm '#{alarm_name}' disabled." else puts "Could not disable alarm '#{alarm_name}'." end end run_me if $PROGRAM_NAME == __FILE__
  • 有关 API 的详细信息,请参阅 Amazon SDK for Ruby API 参考DisableAlarmActions中的。

以下代码示例演示了如何使用 ListMetrics

适用于 Ruby 的 SDK
注意

还有更多相关信息 GitHub。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。

# Lists available metrics for a metric namespace in Amazon CloudWatch. # # @param cloudwatch_client [Aws::CloudWatch::Client] # An initialized CloudWatch client. # @param metric_namespace [String] The namespace of the metric. # @example # list_metrics_for_namespace( # Aws::CloudWatch::Client.new(region: 'us-east-1'), # 'SITE/TRAFFIC' # ) def list_metrics_for_namespace(cloudwatch_client, metric_namespace) response = cloudwatch_client.list_metrics(namespace: metric_namespace) if response.metrics.count.positive? response.metrics.each do |metric| puts " Metric name: #{metric.metric_name}" if metric.dimensions.count.positive? puts " Dimensions:" metric.dimensions.each do |dimension| puts " Name: #{dimension.name}, Value: #{dimension.value}" end else puts "No dimensions found." end end else puts "No metrics found for namespace '#{metric_namespace}'. " \ "Note that it could take up to 15 minutes for recently-added metrics " \ "to become available." end end # Example usage: def run_me metric_namespace = "SITE/TRAFFIC" # Replace us-west-2 with the AWS Region you're using for Amazon CloudWatch. region = "us-east-1" cloudwatch_client = Aws::CloudWatch::Client.new(region: region) # Add three datapoints. puts "Continuing..." unless datapoint_added_to_metric?( cloudwatch_client, metric_namespace, "UniqueVisitors", "SiteName", "example.com", 5_885.0, "Count" ) puts "Continuing..." unless datapoint_added_to_metric?( cloudwatch_client, metric_namespace, "UniqueVisits", "SiteName", "example.com", 8_628.0, "Count" ) puts "Continuing..." unless datapoint_added_to_metric?( cloudwatch_client, metric_namespace, "PageViews", "PageURL", "example.html", 18_057.0, "Count" ) puts "Metrics for namespace '#{metric_namespace}':" list_metrics_for_namespace(cloudwatch_client, metric_namespace) end run_me if $PROGRAM_NAME == __FILE__
  • 有关 API 的详细信息,请参阅 Amazon SDK for Ruby API 参考ListMetrics中的。

以下代码示例演示了如何使用 PutMetricAlarm

适用于 Ruby 的 SDK
注意

还有更多相关信息 GitHub。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。

# Creates or updates an alarm in Amazon CloudWatch. # # @param cloudwatch_client [Aws::CloudWatch::Client] # An initialized CloudWatch client. # @param alarm_name [String] The name of the alarm. # @param alarm_description [String] A description about the alarm. # @param metric_name [String] The name of the metric associated with the alarm. # @param alarm_actions [Array] A list of Strings representing the # Amazon Resource Names (ARNs) to execute when the alarm transitions to the # ALARM state. # @param namespace [String] The namespace for the metric to alarm on. # @param statistic [String] The statistic for the metric. # @param dimensions [Array] A list of dimensions for the metric, specified as # Aws::CloudWatch::Types::Dimension. # @param period [Integer] The number of seconds before re-evaluating the metric. # @param unit [String] The unit of measure for the statistic. # @param evaluation_periods [Integer] The number of periods over which data is # compared to the specified threshold. # @param theshold [Float] The value against which the specified statistic is compared. # @param comparison_operator [String] The arithmetic operation to use when # comparing the specified statistic and threshold. # @return [Boolean] true if the alarm was created or updated; otherwise, false. # @example # exit 1 unless alarm_created_or_updated?( # Aws::CloudWatch::Client.new(region: 'us-east-1'), # 'ObjectsInBucket', # 'Objects exist in this bucket for more than 1 day.', # 'NumberOfObjects', # ['arn:aws:sns:us-east-1:111111111111:Default_CloudWatch_Alarms_Topic'], # 'AWS/S3', # 'Average', # [ # { # name: 'BucketName', # value: 'doc-example-bucket' # }, # { # name: 'StorageType', # value: 'AllStorageTypes' # } # ], # 86_400, # 'Count', # 1, # 1, # 'GreaterThanThreshold' # ) def alarm_created_or_updated?( cloudwatch_client, alarm_name, alarm_description, metric_name, alarm_actions, namespace, statistic, dimensions, period, unit, evaluation_periods, threshold, comparison_operator ) cloudwatch_client.put_metric_alarm( alarm_name: alarm_name, alarm_description: alarm_description, metric_name: metric_name, alarm_actions: alarm_actions, namespace: namespace, statistic: statistic, dimensions: dimensions, period: period, unit: unit, evaluation_periods: evaluation_periods, threshold: threshold, comparison_operator: comparison_operator ) return true rescue StandardError => e puts "Error creating alarm: #{e.message}" return false end
  • 有关 API 的详细信息,请参阅 Amazon SDK for Ruby API 参考PutMetricAlarm中的。

以下代码示例演示了如何使用 PutMetricData

适用于 Ruby 的 SDK
注意

还有更多相关信息 GitHub。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。

require "aws-sdk-cloudwatch" # Adds a datapoint to a metric in Amazon CloudWatch. # # @param cloudwatch_client [Aws::CloudWatch::Client] # An initialized CloudWatch client. # @param metric_namespace [String] The namespace of the metric to add the # datapoint to. # @param metric_name [String] The name of the metric to add the datapoint to. # @param dimension_name [String] The name of the dimension to add the # datapoint to. # @param dimension_value [String] The value of the dimension to add the # datapoint to. # @param metric_value [Float] The value of the datapoint. # @param metric_unit [String] The unit of measurement for the datapoint. # @return [Boolean] # @example # exit 1 unless datapoint_added_to_metric?( # Aws::CloudWatch::Client.new(region: 'us-east-1'), # 'SITE/TRAFFIC', # 'UniqueVisitors', # 'SiteName', # 'example.com', # 5_885.0, # 'Count' # ) def datapoint_added_to_metric?( cloudwatch_client, metric_namespace, metric_name, dimension_name, dimension_value, metric_value, metric_unit ) cloudwatch_client.put_metric_data( namespace: metric_namespace, metric_data: [ { metric_name: metric_name, dimensions: [ { name: dimension_name, value: dimension_value } ], value: metric_value, unit: metric_unit } ] ) puts "Added data about '#{metric_name}' to namespace " \ "'#{metric_namespace}'." return true rescue StandardError => e puts "Error adding data about '#{metric_name}' to namespace " \ "'#{metric_namespace}': #{e.message}" return false end
  • 有关 API 的详细信息,请参阅 Amazon SDK for Ruby API 参考PutMetricData中的。