gems: include vendored metrisk without hitime dependency

hitime is only needed for Metriks::Timer and requires native extensions.
Those do not compile with default settings under Ubuntu 26.04 or Alpine 3.24.

.rubocop.yml

@@ -2,9 +2,15 @@ plugins:
 - rubocop-rake
 - rubocop-rspec
 
+inherit_mode:
+  merge: [Exclude]
+
 AllCops:
   TargetRubyVersion: '3.0'
   NewCops: enable
+  Exclude:
+  - 'lib/metriks/**/*'
+  - 'lib/metriks.rb'
 
 Gemspec/DevelopmentDependencies:
   EnforcedStyle: gemspec

dyndnsd.gemspec

@@ -31,7 +31,6 @@ Gem::Specification.new do |s|
   s.add_dependency 'async-dns', '~> 1.3.0'
   s.add_dependency 'base64', '~> 0.3.0' # needed for async
   s.add_dependency 'logger', '>= 1.6', '< 1.8'
-  s.add_dependency 'metriks'
   s.add_dependency 'opentelemetry-exporter-jaeger', '~> 0.22.0'
   s.add_dependency 'opentelemetry-instrumentation-rack', '~> 0.22.0'
   s.add_dependency 'opentelemetry-sdk', '~> 1.2.0'

lib/dyndnsd/textfile_reporter.rb

@@ -58,34 +58,6 @@ module Dyndnsd
               :count, :one_minute_rate, :five_minute_rate,
               :fifteen_minute_rate, :mean_rate
             ]
-          when Metriks::Counter
-            write_metric f, name, metric, [
-              :count
-            ]
-          when Metriks::UtilizationTimer
-            write_metric f, name, metric, [
-              :count, :one_minute_rate, :five_minute_rate,
-              :fifteen_minute_rate, :mean_rate,
-              :min, :max, :mean, :stddev,
-              :one_minute_utilization, :five_minute_utilization,
-              :fifteen_minute_utilization, :mean_utilization
-            ], [
-              :median, :get_95th_percentile
-            ]
-          when Metriks::Timer
-            write_metric f, name, metric, [
-              :count, :one_minute_rate, :five_minute_rate,
-              :fifteen_minute_rate, :mean_rate,
-              :min, :max, :mean, :stddev
-            ], [
-              :median, :get_95th_percentile
-            ]
-          when Metriks::Histogram
-            write_metric f, name, metric, [
-              :count, :min, :max, :mean, :stddev
-            ], [
-              :median, :get_95th_percentile
-            ]
           end
         end
       end

lib/metriks.rb

@@ -0,0 +1,27 @@
+# Vendored from metriks 0.9.9.8 — https://github.com/eric/metriks
+# Copyright (c) 2012 Eric Lindvall, MIT licensed.
+# Trimmed to the subset dyndnsd uses (meters + registry + reporters);
+# counter/gauge/timer/utilization_timer/histogram support was removed,
+# and the 'atomic'/'avl_tree'/'hitimes' dependencies were replaced or dropped.
+
+module Metriks
+  VERSION = '0.9.9.8'
+
+  def self.get(name)
+    Registry.default.get(name)
+  end
+
+  def self.meter(name)
+    Registry.default.meter(name)
+  end
+
+  def self.registry
+    Registry.default
+  end
+end
+
+require 'metriks/atomic'
+require 'metriks/ewma'
+require 'metriks/meter'
+require 'metriks/registry'
+require 'metriks/reporter/proc_title'

lib/metriks/atomic.rb

@@ -0,0 +1,34 @@
+# Minimal pure-Ruby replacement for the 'atomic' gem, covering the exact API
+# the vendored metriks code uses (Atomic.new, #value, #value=, #update,
+# #compare_and_swap). Mutex-guarded instead of relying on a native extension.
+module Metriks
+  class Atomic
+    def initialize(value = nil)
+      @value = value
+      @mutex = Mutex.new
+    end
+
+    def value
+      @mutex.synchronize { @value }
+    end
+
+    def value=(new_value)
+      @mutex.synchronize { @value = new_value }
+    end
+
+    def update
+      @mutex.synchronize { @value = yield(@value) }
+    end
+
+    def compare_and_swap(expected, new_value)
+      @mutex.synchronize do
+        if @value == expected
+          @value = new_value
+          true
+        else
+          false
+        end
+      end
+    end
+  end
+end

lib/metriks/ewma.rb

@@ -0,0 +1,66 @@
+# Vendored from metriks 0.9.9.8 — https://github.com/eric/metriks
+# Copyright (c) 2012 Eric Lindvall, MIT licensed.
+# Trimmed to the subset dyndnsd uses (meters + registry + reporters).
+
+
+module Metriks
+  class EWMA
+    INTERVAL = 5.0
+    SECONDS_PER_MINUTE = 60.0
+
+    ONE_MINUTE      = 1
+    FIVE_MINUTES    = 5
+    FIFTEEN_MINUTES = 15
+
+    M1_ALPHA  = 1 - Math.exp(-INTERVAL / SECONDS_PER_MINUTE / ONE_MINUTE)
+    M5_ALPHA  = 1 - Math.exp(-INTERVAL / SECONDS_PER_MINUTE / FIVE_MINUTES)
+    M15_ALPHA = 1 - Math.exp(-INTERVAL / SECONDS_PER_MINUTE / FIFTEEN_MINUTES)
+
+    def self.new_m1
+      new(M1_ALPHA, INTERVAL)
+    end
+
+    def self.new_m5
+      new(M5_ALPHA, INTERVAL)
+    end
+
+    def self.new_m15
+      new(M15_ALPHA, INTERVAL)
+    end
+
+    def initialize(alpha, interval)
+      @alpha    = alpha
+      @interval = interval
+
+      @initialized = false
+      @rate        = Atomic.new(0.0)
+      @uncounted   = Atomic.new(0)
+    end
+
+    def clear
+      @initialized = false
+      @rate.value = 0.0
+      @uncounted.value = 0
+    end
+
+    def update(value)
+      @uncounted.update { |v| v + value }
+    end
+
+    def tick
+      count = @uncounted.swap(0)
+      instant_rate = count / @interval.to_f
+
+      if @initialized
+        @rate.update { |v| v + @alpha * (instant_rate - v) }
+      else
+        @rate.value = instant_rate
+        @initialized = true
+      end
+    end
+
+    def rate
+      @rate.value
+    end
+  end
+end

lib/metriks/meter.rb

@@ -0,0 +1,88 @@
+# Vendored from metriks 0.9.9.8 — https://github.com/eric/metriks
+# Copyright (c) 2012 Eric Lindvall, MIT licensed.
+# Trimmed to the subset dyndnsd uses (meters + registry + reporters).
+
+
+require 'metriks/ewma'
+
+module Metriks
+  class Meter
+    TICK_INTERVAL = 5.0
+
+    def initialize(averager_klass = Metriks::EWMA)
+      @count = Atomic.new(0)
+      @start_time = Time.now.to_f
+      @last_tick = Atomic.new(@start_time)
+
+      @m1_rate  = averager_klass.new_m1
+      @m5_rate  = averager_klass.new_m5
+      @m15_rate = averager_klass.new_m15
+    end
+
+    def clear
+      @count.value = 0
+      @start_time = Time.now.to_f
+      @last_tick.value = @start_time
+      @m1_rate.clear
+      @m5_rate.clear
+      @m15_rate.clear
+    end
+
+    def tick
+      @m1_rate.tick
+      @m5_rate.tick
+      @m15_rate.tick
+    end
+
+    def tick_if_nessesary
+      old_tick = @last_tick.value
+      new_tick = Time.new.to_f
+      age = new_tick - old_tick
+      if age > TICK_INTERVAL && @last_tick.compare_and_swap(old_tick, new_tick)
+        required_ticks = age / TICK_INTERVAL
+        required_ticks.to_i.times do
+          tick
+        end
+      end
+    end
+
+    def mark(val = 1)
+      tick_if_nessesary
+      @count.update { |v| v + val }
+      @m1_rate.update(val)
+      @m5_rate.update(val)
+      @m15_rate.update(val)
+    end
+
+    def count
+      @count.value
+    end
+
+    def one_minute_rate
+      tick_if_nessesary
+      @m1_rate.rate
+    end
+
+    def five_minute_rate
+      tick_if_nessesary
+      @m5_rate.rate
+    end
+
+    def fifteen_minute_rate
+      tick_if_nessesary
+      @m15_rate.rate
+    end
+
+    def mean_rate
+      if count == 0
+        return 0.0
+      else
+        elapsed = Time.now.to_f - @start_time
+        count / elapsed
+      end
+    end
+
+    def stop
+    end
+  end
+end

lib/metriks/registry.rb

@@ -0,0 +1,127 @@
+# Vendored from metriks 0.9.9.8 — https://github.com/eric/metriks
+# Copyright (c) 2012 Eric Lindvall, MIT licensed.
+# Trimmed to the subset dyndnsd uses (meters + registry + reporters).
+
+require 'metriks/meter'
+
+module Metriks
+  # Public: A collection of metrics
+  class Registry
+    # Public: The default registry for the process.
+    #
+    # Returns the default Registry for the process.
+    def self.default
+      @default ||= new
+    end
+
+    # Public: Initializes a new Registry.
+    def initialize
+      @mutex = Mutex.new
+      @metrics = {}
+    end
+
+    # Public: Clear all of the metrics in the Registry. This ensures all
+    # metrics that have been added are stopped.
+    #
+    # Returns nothing.
+    def clear
+      @mutex.synchronize do
+        @metrics.each do |key, metric|
+          metric.stop if metric.respond_to?(:stop)
+        end
+
+        @metrics = {}
+      end
+    end
+
+    # Public: Clear all of the metrics in the Registry. This has the same
+    # effect as calling #clear.
+    #
+    # Returns nothing.
+    def stop
+      clear
+    end
+
+    # Public: Iterate over all of the counters.
+    #
+    # Examples
+    #
+    #   registry.each do |name, metric|
+    #     puts name
+    #   end
+    #
+    # Returns nothing.
+    def each(&block)
+      metrics = @mutex.synchronize do
+        @metrics.dup
+      end
+
+      metrics.each(&block)
+    end
+
+    # Public: Fetch or create a new meter metric. Meters are a counter that
+    # tracks throughput along with the count.
+    #
+    # name - The String name of the metric to define or fetch
+    #
+    # Examples
+    #
+    #   registry.meter('resque.calls')
+    #
+    # Returns the Metriks::Meter identified by the name.
+    def meter(name)
+      add_or_get(name, Metriks::Meter)
+    end
+
+    # Public: Fetch an existing metric.
+    #
+    # name - The String name of the metric to fetch
+    #
+    # Examples
+    #
+    #   registry.get('rack.utilization')
+    #
+    # Returns the metric or nil.
+    def get(name)
+      @mutex.synchronize do
+        @metrics[name]
+      end
+    end
+
+    # Public: Add a new metric.
+    #
+    # name - The String name of the metric to add
+    # metric - The metric instance to add
+    #
+    # Examples
+    #
+    #   registry.add('method.calls', Metriks::Counter.new)
+    #
+    # Returns nothing.
+    # Raises RuntimeError if the metric name is already defined
+    def add(name, metric)
+      @mutex.synchronize do
+        if @metrics[name]
+          raise "Metric '#{name}' already defined"
+        else
+          @metrics[name] = metric
+        end
+      end
+    end
+
+    protected
+    def add_or_get(name, klass, &create_metric)
+      @mutex.synchronize do
+        if metric = @metrics[name]
+          if !metric.is_a?(klass)
+            raise "Metric already defined as '#{metric.class}'"
+          else
+            return metric
+          end
+        else
+          @metrics[name] = create_metric ? create_metric.call : klass.new
+        end
+      end
+    end
+  end
+end

lib/metriks/reporter/graphite.rb

@@ -0,0 +1,91 @@
+# Vendored from metriks 0.9.9.8 — https://github.com/eric/metriks
+# Copyright (c) 2012 Eric Lindvall, MIT licensed.
+# Trimmed to the subset dyndnsd uses (meters + registry + reporters).
+
+require 'socket'
+
+module Metriks::Reporter
+  class Graphite
+    attr_reader :host, :port
+
+    def initialize(host, port, options = {})
+      @host = host
+      @port = port
+
+      @prefix = options[:prefix]
+
+      @registry  = options[:registry] || Metriks::Registry.default
+      @interval  = options[:interval] || 60
+      @on_error  = options[:on_error] || proc { |ex| }
+    end
+
+    def socket
+      @socket = nil if @socket && @socket.closed?
+      @socket ||= TCPSocket.new(@host, @port)
+    end
+
+    def start
+      @thread ||= Thread.new do
+        loop do
+          sleep @interval
+
+          Thread.new do
+            begin
+              write
+            rescue Exception => ex
+              @on_error[ex] rescue nil
+            end
+          end
+        end
+      end
+    end
+
+    def stop
+      @thread.kill if @thread
+      @thread = nil
+    end
+
+    def restart
+      stop
+      start
+    end
+
+    def write
+      @registry.each do |name, metric|
+        case metric
+        when Metriks::Meter
+          write_metric name, metric, [
+            :count, :one_minute_rate, :five_minute_rate,
+            :fifteen_minute_rate, :mean_rate
+          ]
+        end
+      end
+    end
+
+    def write_metric(base_name, metric, keys, snapshot_keys = [])
+      time = Time.now.to_i
+
+      base_name = base_name.to_s.gsub(/ +/, '_')
+      if @prefix
+        base_name = "#{@prefix}.#{base_name}"
+      end
+
+      keys.flatten.each do |key|
+        name = key.to_s.gsub(/^get_/, '')
+        value = metric.send(key)
+        socket.write("#{base_name}.#{name} #{value} #{time}\n")
+      end
+
+      unless snapshot_keys.empty?
+        snapshot = metric.snapshot
+        snapshot_keys.flatten.each do |key|
+          name = key.to_s.gsub(/^get_/, '')
+          value = snapshot.send(key)
+          socket.write("#{base_name}.#{name} #{value} #{time}\n")
+        end
+      end
+    rescue Errno::EPIPE
+      socket.close
+    end
+  end
+end

lib/metriks/reporter/proc_title.rb

@@ -0,0 +1,63 @@
+# Vendored from metriks 0.9.9.8 — https://github.com/eric/metriks
+# Copyright (c) 2012 Eric Lindvall, MIT licensed.
+# Trimmed to the subset dyndnsd uses (meters + registry + reporters).
+
+module Metriks::Reporter
+  class ProcTitle
+    def initialize(options = {})
+      @rounding = options[:rounding] || 1
+      @prefix   = options[:prefix]   || $0.dup
+
+      @interval  = options[:interval] || 5
+      @on_error  = options[:on_error] || proc { |ex| }
+
+      @metrics  = []
+    end
+
+    def add(name, suffix = nil, &block)
+      @metrics << [ name, suffix, block ]
+    end
+
+    def empty?
+      @metrics.empty?
+    end
+
+    def start
+      @thread ||= Thread.new do
+        loop do
+          begin
+            unless @metrics.empty?
+              title = generate_title
+              if title && !title.empty?
+                $0 = "#{@prefix} #{title}"
+              end
+            end
+          rescue Exception => ex
+            @on_error[ex] rescue nil
+          end
+          sleep @interval
+        end
+      end
+    end
+
+    def stop
+      @thread.kill if @thread
+      @thread = nil
+    end
+
+    def restart
+      stop
+      start
+    end
+
+    protected
+    def generate_title
+      @metrics.collect do |name, suffix, block|
+        val = block.call
+        val = "%.#{@rounding}f" % val if val.is_a?(Float)
+
+        "#{name}: #{val}#{suffix}"
+      end.join(' ')
+    end
+  end
+end