使用Ruby SDK for AWS/CloudWatch。我试图简单地获取特定RDS实例的平均CPU利用率。Ruby AWS SDK CloudWatch
metric = AWS::CloudWatch::Metric.new('AWS/RDS', 'CPUUtilization', :dimensions => {[ :name => 'DBInstanceIdentifier'], [:value => 'my_db_instance' ] })
puts metric.metric_name # shows the right name
puts metric.namespace # shows the right namespace
stats = metric.statistics(:start_time => Time.now - 300, :statistics => ['Average'])
最后一行失败:
/Library/Ruby/Gems/1.8/gems/aws-sdk-1.12.0/lib/aws/core/option_grammar.rb:337:in `validate': expected hash value for member 1 of option dimensions (AWS::Core::OptionGrammar::FormatError)
我也试过:
stats = metric.statistics(:options => {[:start_time => Time.now - 300], [:statistics => ['Average']]})
,并得到了同样的错误。
stats = metric.statistics({[:start_time => Time.now - 300], [:statistics => ['Average']]})
给出:
/Library/Ruby/Gems/1.8/gems/aws-sdk-1.12.0/lib/aws/core/option_grammar.rb:588:in `validate': unexpected option start_timeSat Jul 20 11:27:14 -0400 2013 (ArgumentError)
继AWS文档,我能够从代码中找回数据是这样的:
metric = CloudWatch::Metric.new('AWS/RDS', 'CPUUtilization')
stats = metric.statistics(:start_time => Time.now - 3600, :end_time => Time.now, :statistics => ['Average'])
stats.label #=> 'some-label'
stats.each do |datapoint|
puts datapoint
end
但我不明白如何缩小这个到我感兴趣的特定实例,因为数据点哈希没有说明它来自哪个实例。
我对Ruby很新,但使用SDK的EC2,ELB,AutoScaling部分已经取得成功。 CloudWatch正在困扰着我。
我很欣赏任何人都可以提供的帮助。
彼得
感谢kino1。花了我一段时间来测试,但你的解决方案让我过了一会儿。我还注意到它可以在没有大括号的情况下工作: :dimensions => [:name =>'DBInstanceIdentifier',:value =>'my_db_instance'] – Peter
没有大括号,它更干,很棒。我只是想知道Ruby现在实际构造的是什么......我决定不要编辑帖子来反映@peter评论,但是因为我认为对于2维尺寸,您需要再次使用大括号,即'[{:name =>'dim1 ',:value =>'val1'},{:name =>'dim2',:value =>'val2'}]' – kino1