256 lines
8.1 KiB
Ruby
256 lines
8.1 KiB
Ruby
# frozen_string_literal: true
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# See http://unicorn.bogomips.org/Unicorn/Configurator.html
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if (ENV["LOGSTASH_UNICORN_URI"] || "").length > 0
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require_relative '../lib/discourse_logstash_logger'
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logger DiscourseLogstashLogger.logger(uri: ENV['LOGSTASH_UNICORN_URI'], type: :unicorn)
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end
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discourse_path = File.expand_path(File.expand_path(File.dirname(__FILE__)) + "/../")
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# tune down if not enough ram
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worker_processes (ENV["UNICORN_WORKERS"] || 3).to_i
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working_directory discourse_path
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# listen "#{discourse_path}/tmp/sockets/unicorn.sock"
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listen "#{(ENV["UNICORN_BIND_ALL"] ? "" : "127.0.0.1:")}#{(ENV["UNICORN_PORT"] || 3000).to_i}"
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if !File.exist?("#{discourse_path}/tmp/pids")
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FileUtils.mkdir_p("#{discourse_path}/tmp/pids")
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end
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# feel free to point this anywhere accessible on the filesystem
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pid (ENV["UNICORN_PID_PATH"] || "#{discourse_path}/tmp/pids/unicorn.pid")
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if ENV["RAILS_ENV"] == "development" || !ENV["RAILS_ENV"]
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logger Logger.new($stdout)
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# we want a longer timeout in dev cause first request can be really slow
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timeout (ENV["UNICORN_TIMEOUT"] && ENV["UNICORN_TIMEOUT"].to_i || 60)
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else
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# By default, the Unicorn logger will write to stderr.
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# Additionally, some applications/frameworks log to stderr or stdout,
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# so prevent them from going to /dev/null when daemonized here:
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stderr_path "#{discourse_path}/log/unicorn.stderr.log"
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stdout_path "#{discourse_path}/log/unicorn.stdout.log"
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# nuke workers after 30 seconds instead of 60 seconds (the default)
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timeout 30
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end
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# important for Ruby 2.0
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preload_app true
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# Enable this flag to have unicorn test client connections by writing the
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# beginning of the HTTP headers before calling the application. This
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# prevents calling the application for connections that have disconnected
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# while queued. This is only guaranteed to detect clients on the same
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# host unicorn runs on, and unlikely to detect disconnects even on a
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# fast LAN.
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check_client_connection false
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initialized = false
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before_fork do |server, worker|
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unless initialized
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Discourse.preload_rails!
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# V8 does not support forking, make sure all contexts are disposed
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ObjectSpace.each_object(MiniRacer::Context) { |c| c.dispose }
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# get rid of rubbish so we don't share it
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# longer term we will use compact! here
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GC.start
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GC.start
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GC.start
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initialized = true
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supervisor = ENV['UNICORN_SUPERVISOR_PID'].to_i
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if supervisor > 0
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Thread.new do
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while true
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unless File.exists?("/proc/#{supervisor}")
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puts "Kill self supervisor is gone"
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Process.kill "TERM", Process.pid
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end
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sleep 2
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end
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end
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end
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sidekiqs = ENV['UNICORN_SIDEKIQS'].to_i
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if sidekiqs > 0
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puts "Starting up #{sidekiqs} supervised sidekiqs"
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require 'demon/sidekiq'
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Demon::Sidekiq.after_fork do
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DiscourseEvent.trigger(:sidekiq_fork_started)
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end
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Demon::Sidekiq.start(sidekiqs)
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Signal.trap("SIGTSTP") do
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STDERR.puts "#{Time.now}: Issuing stop to sidekiq"
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Demon::Sidekiq.stop
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end
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# Trap USR1, so we can re-issue to sidekiq workers
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# but chain the default unicorn implementation as well
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old_handler = Signal.trap("USR1") do
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Demon::Sidekiq.kill("USR1")
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old_handler.call
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end
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end
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puts "Starting up email sync"
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Demon::EmailSync.start
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Signal.trap("SIGTSTP") do
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STDERR.puts "#{Time.now}: Issuing stop to email_sync"
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Demon::EmailSync.stop
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end
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class ::Unicorn::HttpServer
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alias :master_sleep_orig :master_sleep
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def max_sidekiq_rss
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rss = `ps -eo rss,args | grep sidekiq | grep -v grep | awk '{print $1}'`
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.split("\n")
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.map(&:to_i)
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.max
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rss ||= 0
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rss * 1024
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end
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def max_allowed_sidekiq_rss
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[ENV['UNICORN_SIDEKIQ_MAX_RSS'].to_i, 500].max.megabytes
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end
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def force_kill_rogue_sidekiq
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info = `ps -eo pid,rss,args | grep sidekiq | grep -v grep | awk '{print $1,$2}'`
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info.split("\n").each do |row|
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pid, mem = row.split(" ").map(&:to_i)
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if pid > 0 && (mem * 1024) > max_allowed_sidekiq_rss
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Rails.logger.warn "Detected rogue Sidekiq pid #{pid} mem #{mem * 1024}, killing"
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Process.kill("KILL", pid) rescue nil
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end
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end
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end
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def check_sidekiq_heartbeat
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@sidekiq_heartbeat_interval ||= 30.minutes
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@sidekiq_next_heartbeat_check ||= Time.now.to_i + @sidekiq_heartbeat_interval
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if @sidekiq_next_heartbeat_check < Time.now.to_i
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last_heartbeat = Jobs::RunHeartbeat.last_heartbeat
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restart = false
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sidekiq_rss = max_sidekiq_rss
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if sidekiq_rss > max_allowed_sidekiq_rss
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Rails.logger.warn("Sidekiq is consuming too much memory (using: %0.2fM) for '%s', restarting" % [(sidekiq_rss.to_f / 1.megabyte), ENV["DISCOURSE_HOSTNAME"]])
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restart = true
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end
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if last_heartbeat < Time.now.to_i - @sidekiq_heartbeat_interval
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STDERR.puts "Sidekiq heartbeat test failed, restarting"
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Rails.logger.warn "Sidekiq heartbeat test failed, restarting"
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restart = true
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end
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@sidekiq_next_heartbeat_check = Time.now.to_i + @sidekiq_heartbeat_interval
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if restart
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Demon::Sidekiq.restart
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sleep 10
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force_kill_rogue_sidekiq
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end
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Discourse.redis.close
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end
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end
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def max_email_sync_rss
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return 0 if Demon::EmailSync.demons.empty?
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email_sync_pids = Demon::EmailSync.demons.map { |uid, demon| demon.pid }
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return 0 if email_sync_pids.empty?
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rss = `ps -eo pid,rss,args | grep '#{email_sync_pids.join('|')}' | grep -v grep | awk '{print $2}'`
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.split("\n")
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.map(&:to_i)
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.max
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(rss || 0) * 1024
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end
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def max_allowed_email_sync_rss
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[ENV['UNICORN_EMAIL_SYNC_MAX_RSS'].to_i, 500].max.megabytes
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end
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def check_email_sync_heartbeat
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# Skip first check to let process warm up
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@email_sync_next_heartbeat_check ||= (Time.now + Demon::EmailSync::HEARTBEAT_INTERVAL).to_i
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return if @email_sync_next_heartbeat_check > Time.now.to_i
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@email_sync_next_heartbeat_check = (Time.now + Demon::EmailSync::HEARTBEAT_INTERVAL).to_i
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restart = false
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# Restart process if it does not respond anymore
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last_heartbeat_ago = Time.now.to_i - Discourse.redis.get(Demon::EmailSync::HEARTBEAT_KEY).to_i
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if last_heartbeat_ago > Demon::EmailSync::HEARTBEAT_INTERVAL.to_i
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STDERR.puts("EmailSync heartbeat test failed (last heartbeat was #{last_heartbeat_ago}s ago), restarting")
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restart = true
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end
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# Restart process if memory usage is too high
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email_sync_rss = max_email_sync_rss
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if email_sync_rss > max_allowed_email_sync_rss
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STDERR.puts("EmailSync is consuming too much memory (using: %0.2fM) for '%s', restarting" % [(email_sync_rss.to_f / 1.megabyte), ENV["DISCOURSE_HOSTNAME"]])
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restart = true
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end
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Demon::EmailSync.restart if restart
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end
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def master_sleep(sec)
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sidekiqs = ENV['UNICORN_SIDEKIQS'].to_i
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if sidekiqs > 0
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Demon::Sidekiq.ensure_running
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check_sidekiq_heartbeat
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end
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Demon::EmailSync.ensure_running
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check_email_sync_heartbeat
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master_sleep_orig(sec)
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end
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end
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end
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Discourse.redis.close
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# Throttle the master from forking too quickly by sleeping. Due
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# to the implementation of standard Unix signal handlers, this
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# helps (but does not completely) prevent identical, repeated signals
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# from being lost when the receiving process is busy.
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sleep 1
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end
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after_fork do |server, worker|
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DiscourseEvent.trigger(:web_fork_started)
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# warm up v8 after fork, that way we do not fork a v8 context
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# it may cause issues if bg threads in a v8 isolate randomly stop
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# working due to fork
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Discourse.after_fork
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begin
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PrettyText.cook("warm up **pretty text**")
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rescue => e
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Rails.logger.error("Failed to warm up pretty text: #{e}")
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end
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end
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