Sidekiq 的启动与重启

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# Usage: bundle exec rake sidekiq:restart RAILS_ENV=<environment name>

namespace :sidekiq do
  sidekiq_pid_file = Rails.root+'tmp/pids/sidekiq.pid'

  desc "Sidekiq stop"
  task :stop do
    puts "#### Trying to stop Sidekiq Now !!! ####"
    if File.exist?(sidekiq_pid_file)
      puts "Stopping sidekiq now #PID-#{File.readlines(sidekiq_pid_file).first}..."
      system "sidekiqctl stop tmp/pids/sidekiq.pid" # stops sidekiq process here
    else
      puts "--- Sidekiq Not Running !!!"
    end
  end

  desc "Sidekiq start"
  task :start do
    puts "Starting Sidekiq..."
    system "bundle exec sidekiq -e production -C config/sidekiq.yml -P tmp/pids/sidekiq.pid -d -L log/sidekiq.log" # starts sidekiq process here
    sleep(2)
    puts "Sidekiq started #PID-#{File.readlines(sidekiq_pid_file).first}."
  end

  desc "Sidekiq restart"
  task :restart do
    puts "#### Trying to restart Sidekiq Now !!! ####"
    Rake::Task['sidekiq:stop'].invoke
    Rake::Task['sidekiq:start'].invoke
    puts "#### Sidekiq restarted successfully !!! ####"
  end
end

更多sidekiq操作见这里：https://github.com/mperham/sidekiq/wiki/API#retries，可以清除重试的任务