check-rds.rb in sensu-plugins-aws-3.0.0

- old
+ new

@@ -26,10 +26,13 @@
 #   check-rds -i sensu-admin-db --cpu-critical-over 90 --statistics maximum --period 3600
 #
 #   Warning if DatabaseConnections are over 100, critical over 120
 #   check-rds -i sensu-admin-db --connections-critical-over 120 --connections-warning-over 100 --statistics maximum --period 3600
 #
+#   Warning if IOPS are over 100, critical over 200
+#   check-rds -i sensu-admin-db --iops-critical-over 200 --iops-warning-over 100 --period 300
+#
 #   Warning if memory usage is over 80%, maximum of last 2 hour
 #   specifying "minimum" is intended actually since memory usage is calculated from CloudWatch "FreeableMemory" metric.
 #   check-rds -i sensu-admin-db --memory-warning-over 80 --statistics minimum --period 7200
 #
 #   Disk usage, same as memory
@@ -108,11 +111,11 @@
   %w(warning critical).each do |severity|
     option :"availability_zone_#{severity}",
            long:        "--availability-zone-#{severity} AZ",
            description: "Trigger a #{severity} if availability zone is different than given argument"
 
-    %w(cpu memory disk connections).each do |item|
+    %w(cpu memory disk connections iops).each do |item|
       option :"#{item}_#{severity}_over",
              long:        "--#{item}-#{severity}-over N",
              proc:        proc(&:to_f),
              description: "Trigger a #{severity} if #{item} usage is over a percentage"
     end
@@ -244,10 +247,20 @@
     @connections_metric_value ||= latest_value @connections_metric
     return if @connections_metric_value < expected_lower_than
     flag_alert severity, "; DatabaseConnections are #{sprintf '%d', @connections_metric_value} (expected lower than #{expected_lower_than})"
   end
 
+  def check_iops(severity, expected_lower_than)
+    @read_iops_metric ||= cloud_watch_metric 'ReadIOPS', 'Count/Second'
+    @read_iops_metric_value ||= latest_value @read_iops_metric
+    @write_iops_metric ||= cloud_watch_metric 'WriteIOPS', 'Count/Second'
+    @write_iops_metric_value ||= latest_value @write_iops_metric
+    @iops_metric_value ||= @read_iops_metric_value + @write_iops_metric_value
+    return if @iops_metric_value < expected_lower_than
+    flag_alert severity, "; IOPS are #{sprintf '%d', @iops_metric_value} (expected lower than #{expected_lower_than})"
+  end
+
   def run
     if config[:db_instance_id].nil? || config[:db_instance_id].empty?
       unknown 'No DB instance provided.  See help for usage details'
     end
 
@@ -259,15 +272,15 @@
     }
 
     @severities.keys.each do |severity|
       check_az severity, config[:"availability_zone_#{severity}"] if config[:"availability_zone_#{severity}"]
 
-      %w(cpu memory disk connections).each do |item|
+      %w(cpu memory disk connections iops).each do |item|
         send "check_#{item}", severity, config[:"#{item}_#{severity}_over"] if config[:"#{item}_#{severity}_over"]
       end
     end
 
-    if %w(cpu memory disk connections).any? { |item| %w(warning critical).any? { |severity| config[:"#{item}_#{severity}_over"] } }
+    if %w(cpu memory disk connections iops).any? { |item| %w(warning critical).any? { |severity| config[:"#{item}_#{severity}_over"] } }
       @message += "(#{config[:statistics].to_s.capitalize} within #{config[:period]}s "
       @message += "between #{config[:end_time] - config[:period]} to #{config[:end_time]})"
     end
 
     if @severities[:critical]