Class: Fluent::PrometheusOutputMonitorInput
- Inherits:
-
Input
- Object
- Input
- Fluent::PrometheusOutputMonitorInput
- Defined in:
- lib/fluent/plugin/in_prometheus_output_monitor.rb
Defined Under Namespace
Classes: TimerWatcher
Constant Summary collapse
- MONITOR_IVARS =
[ :retry, :num_errors, :emit_count, # for v0.12 :last_retry_time, # from v0.14 :emit_records, :write_count, :rollback_count, ]
Instance Attribute Summary collapse
-
#registry ⇒ Object
readonly
Returns the value of attribute registry.
Instance Method Summary collapse
- #configure(conf) ⇒ Object
-
#initialize ⇒ PrometheusOutputMonitorInput
constructor
A new instance of PrometheusOutputMonitorInput.
- #labels(plugin_info) ⇒ Object
- #run ⇒ Object
- #shutdown ⇒ Object
- #start ⇒ Object
- #update_monitor_info ⇒ Object
Constructor Details
#initialize ⇒ PrometheusOutputMonitorInput
Returns a new instance of PrometheusOutputMonitorInput.
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 27 def initialize super @registry = ::Prometheus::Client.registry end |
Instance Attribute Details
#registry ⇒ Object (readonly)
Returns the value of attribute registry.
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 10 def registry @registry end |
Instance Method Details
#configure(conf) ⇒ Object
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 32 def configure(conf) super hostname = Socket.gethostname = Fluent::Prometheus.(log) placeholders = .prepare_placeholders({'hostname' => hostname}) @base_labels = Fluent::Prometheus.parse_labels_elements(conf) @base_labels.each do |key, value| @base_labels[key] = .(value, placeholders) end if defined?(Fluent::Plugin) && defined?(Fluent::Plugin::MonitorAgentInput) # from v0.14.6 @monitor_agent = Fluent::Plugin::MonitorAgentInput.new else @monitor_agent = Fluent::MonitorAgentInput.new end @metrics = { buffer_queue_length: @registry.gauge( :fluentd_output_status_buffer_queue_length, 'Current buffer queue length.'), buffer_total_queued_size: @registry.gauge( :fluentd_output_status_buffer_total_bytes, 'Current total size of queued buffers.'), retry_counts: @registry.gauge( :fluentd_output_status_retry_count, 'Current retry counts.'), num_errors: @registry.gauge( :fluentd_output_status_num_errors, 'Current number of errors.'), emit_count: @registry.gauge( :fluentd_output_status_emit_count, 'Current emit counts.'), emit_records: @registry.gauge( :fluentd_output_status_emit_records, 'Current emit records.'), write_count: @registry.gauge( :fluentd_output_status_write_count, 'Current write counts.'), rollback_count: @registry.gauge( :fluentd_output_status_rollback_count, 'Current rollback counts.'), retry_wait: @registry.gauge( :fluentd_output_status_retry_wait, 'Current retry wait'), } end |
#labels(plugin_info) ⇒ Object
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 175 def labels(plugin_info) @base_labels.merge( plugin_id: plugin_info["plugin_id"], type: plugin_info["type"], ) end |
#run ⇒ Object
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 110 def run @loop.run rescue log.error "unexpected error", :error=>$!.to_s log.error_backtrace end |
#shutdown ⇒ Object
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 103 def shutdown super @loop.watchers.each {|w| w.detach } @loop.stop @thread.join end |
#start ⇒ Object
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 95 def start super @loop = Coolio::Loop.new @timer = TimerWatcher.new(@interval, true, log, &method(:update_monitor_info)) @loop.attach(@timer) @thread = Thread.new(&method(:run)) end |
#update_monitor_info ⇒ Object
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# File 'lib/fluent/plugin/in_prometheus_output_monitor.rb', line 117 def update_monitor_info opts = { ivars: MONITOR_IVARS, with_retry: true, } agent_info = @monitor_agent.plugins_info_all(opts).select {|info| info['plugin_category'] == 'output'.freeze } monitor_info = { 'buffer_queue_length' => @metrics[:buffer_queue_length], 'buffer_total_queued_size' => @metrics[:buffer_total_queued_size], 'retry_count' => @metrics[:retry_counts], } instance_vars_info = { num_errors: @metrics[:num_errors], write_count: @metrics[:write_count], emit_count: @metrics[:emit_count], emit_records: @metrics[:emit_records], rollback_count: @metrics[:rollback_count], } agent_info.each do |info| label = labels(info) monitor_info.each do |name, metric| if info[name] metric.set(label, info[name]) end end if info['instance_variables'] instance_vars_info.each do |name, metric| if info['instance_variables'][name] metric.set(label, info['instance_variables'][name]) end end end # compute current retry_wait if info['retry'] next_time = info['retry']['next_time'] start_time = info['retry']['start'] if start_time.nil? && info['instance_variables'] # v0.12 does not include start, use last_retry_time instead start_time = info['instance_variables'][:last_retry_time] end wait = 0 if next_time && start_time wait = next_time - start_time end @metrics[:retry_wait].set(label, wait.to_f) end end end |