46 lines
1.8 KiB
Ruby
46 lines
1.8 KiB
Ruby
require 'prometheus_exporter/instrumentation'
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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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max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
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min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
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threads min_threads_count, max_threads_count
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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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PrometheusExporter::Instrumentation::ActiveRecord.start(
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custom_labels: { type: "puma_single_mode" }, #optional params
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config_labels: [:database, :host] #optional params
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)
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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 `rails restart` command.
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plugin :tmp_restart
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