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62 lines
2.1 KiB
Ruby
62 lines
2.1 KiB
Ruby
# frozen_string_literal: true
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# Puma can serve each request in a thread from an internal thread pool.
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# The `threads` method setting takes two numbers: a minimum and maximum.
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# Any libraries that use thread pools should be configured to match
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# the maximum value specified for Puma. Default is set to 5 threads for minimum
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# and maximum; this matches the default thread size of Active Record.
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#
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threads_count = ENV.fetch('RAILS_MAX_THREADS', 5)
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threads threads_count, threads_count
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# Specifies the `worker_timeout` threshold that Puma will use to wait before
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# terminating a worker in development environments.
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#
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worker_timeout 3600 if ENV.fetch('RAILS_ENV', 'development') == 'development'
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# Specifies the `port` that Puma will listen on to receive requests; default is 3000.
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#
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port ENV.fetch('PORT', 3000)
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# Specifies the `environment` that Puma will run in.
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#
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environment ENV.fetch('RAILS_ENV', 'development')
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# Specifies the `pidfile` that Puma will use.
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pidfile ENV.fetch('PIDFILE', 'tmp/pids/server.pid')
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# Specifies the number of `workers` to boot in clustered mode.
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# Workers are forked web server processes. If using threads and workers together
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# the concurrency of the application would be max `threads` * `workers`.
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# Workers do not work on JRuby or Windows (both of which do not support
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# processes).
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#
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workers ENV.fetch('WEB_CONCURRENCY', 2)
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# Use the `preload_app!` method when specifying a `workers` number.
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# This directive tells Puma to first boot the application and load code
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# before forking the application. This takes advantage of Copy On Write
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# process behavior so workers use less memory.
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#
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preload_app!
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# Allow puma to be restarted by `bin/rails restart` command.
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plugin :tmp_restart
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# Prometheus exporter
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if ENV['PROMETHEUS_EXPORTER_ENABLED'].to_s == 'true'
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require 'prometheus_exporter/instrumentation'
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before_fork do
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PrometheusExporter::Client.default = PrometheusExporter::Client.new(
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host: ENV.fetch('PROMETHEUS_EXPORTER_HOST', 'ANY'),
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port: ENV.fetch('PROMETHEUS_EXPORTER_PORT', 9394)
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)
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end
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on_worker_boot do
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require 'prometheus_exporter/instrumentation'
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PrometheusExporter::Instrumentation::Puma.start
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end
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end
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