Module: PgHero::Methods::System

Included in:
Database
Defined in:
lib/pghero/methods/system.rb

Instance Method Summary collapse

Instance Method Details

#access_key_id ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 64

def access_key_id
  ENV["PGHERO_ACCESS_KEY_ID"] || ENV["AWS_ACCESS_KEY_ID"]
end

#connection_stats(options = {}) ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 8

def connection_stats(options = {})
  rds_stats("DatabaseConnections", options)
end

#cpu_usage(options = {}) ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 4

def cpu_usage(options = {})
  rds_stats("CPUUtilization", options)
end

#db_instance_identifier ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 76

def db_instance_identifier
  databases[current_database].db_instance_identifier
end

#rds_stats(metric_name, options = {}) ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 24

def rds_stats(metric_name, options = {})
  if system_stats_enabled?
    client =
      if defined?(Aws)
        Aws::CloudWatch::Client.new(access_key_id: access_key_id, secret_access_key: secret_access_key, region: region)
      else
        AWS::CloudWatch.new(access_key_id: access_key_id, secret_access_key: secret_access_key, region: region).client
      end

    duration = (options[:duration] || 1.hour).to_i
    period = (options[:period] || 1.minute).to_i
    offset = (options[:offset] || 0).to_i

    end_time = (Time.now - offset)
    # ceil period
    end_time = Time.at((end_time.to_f / period).ceil * period)

    resp = client.get_metric_statistics(
      namespace: "AWS/RDS",
      metric_name: metric_name,
      dimensions: [{name: "DBInstanceIdentifier", value: db_instance_identifier}],
      start_time: (end_time - duration).iso8601,
      end_time: end_time.iso8601,
      period: period,
      statistics: ["Average"]
    )
    data = {}
    resp[:datapoints].sort_by { |d| d[:timestamp] }.each do |d|
      data[d[:timestamp]] = d[:average]
    end
    data
  else
    {}
  end
end

#read_iops_stats(options = {}) ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 16

def read_iops_stats(options = {})
  rds_stats("ReadIOPS", options)
end

#region ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 72

def region
  ENV["PGHERO_REGION"] || ENV["AWS_REGION"] || (defined?(Aws) && Aws.config[:region]) || "us-east-1"
end

#replication_lag_stats(options = {}) ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 12

def replication_lag_stats(options = {})
  rds_stats("ReplicaLag", options)
end

#secret_access_key ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 68

def secret_access_key
  ENV["PGHERO_SECRET_ACCESS_KEY"] || ENV["AWS_SECRET_ACCESS_KEY"]
end

#system_stats_enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pghero/methods/system.rb', line 60

def system_stats_enabled?
  !!((defined?(Aws) || defined?(AWS)) && access_key_id && secret_access_key && db_instance_identifier)
end

#write_iops_stats(options = {}) ⇒ Object 



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# File 'lib/pghero/methods/system.rb', line 20

def write_iops_stats(options = {})
  rds_stats("WriteIOPS", options)
end