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|
# frozen_string_literal: true
require 'optparse'
require 'logger'
require 'time'
module Gitlab
module SidekiqCluster
class CLI
CHECK_TERMINATE_INTERVAL_SECONDS = 1
# How long to wait when asking for a clean termination.
# It maps the Sidekiq default timeout:
# https://github.com/mperham/sidekiq/wiki/Signals#term
#
# This value is passed to Sidekiq's `-t` if none
# is given through arguments.
DEFAULT_SOFT_TIMEOUT_SECONDS = 25
# After surpassing the soft timeout.
DEFAULT_HARD_TIMEOUT_SECONDS = 5
CommandError = Class.new(StandardError)
def initialize(log_output = STDERR)
require_relative '../../../lib/gitlab/sidekiq_logging/json_formatter'
# As recommended by https://github.com/mperham/sidekiq/wiki/Advanced-Options#concurrency
@max_concurrency = 50
@min_concurrency = 0
@environment = ENV['RAILS_ENV'] || 'development'
@pid = nil
@interval = 5
@alive = true
@processes = []
@logger = Logger.new(log_output)
@logger.formatter = ::Gitlab::SidekiqLogging::JSONFormatter.new
@rails_path = Dir.pwd
@dryrun = false
end
def run(argv = ARGV)
if argv.empty?
raise CommandError,
'You must specify at least one queue to start a worker for'
end
option_parser.parse!(argv)
all_queues = SidekiqConfig::CliMethods.all_queues(@rails_path)
queue_names = SidekiqConfig::CliMethods.worker_queues(@rails_path)
queue_groups = argv.map do |queues|
next queue_names if queues == '*'
# When using the experimental queue query syntax, we treat
# each queue group as a worker attribute query, and resolve
# the queues for the queue group using this query.
if @experimental_queue_selector
SidekiqConfig::CliMethods.query_workers(queues, all_queues)
else
SidekiqConfig::CliMethods.expand_queues(queues.split(','), queue_names)
end
end
if @negate_queues
queue_groups.map! { |queues| queue_names - queues }
end
if queue_groups.all?(&:empty?)
raise CommandError,
'No queues found, you must select at least one queue'
end
unless @dryrun
@logger.info("Starting cluster with #{queue_groups.length} processes")
end
@processes = SidekiqCluster.start(
queue_groups,
env: @environment,
directory: @rails_path,
max_concurrency: @max_concurrency,
min_concurrency: @min_concurrency,
dryrun: @dryrun,
timeout: soft_timeout_seconds
)
return if @dryrun
write_pid
trap_signals
start_loop
end
def write_pid
SidekiqCluster.write_pid(@pid) if @pid
end
def soft_timeout_seconds
@soft_timeout_seconds || DEFAULT_SOFT_TIMEOUT_SECONDS
end
# The amount of time it'll wait for killing the alive Sidekiq processes.
def hard_timeout_seconds
soft_timeout_seconds + DEFAULT_HARD_TIMEOUT_SECONDS
end
def monotonic_time
Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_second)
end
def continue_waiting?(deadline)
SidekiqCluster.any_alive?(@processes) && monotonic_time < deadline
end
def hard_stop_stuck_pids
SidekiqCluster.signal_processes(SidekiqCluster.pids_alive(@processes), "-KILL")
end
def wait_for_termination
deadline = monotonic_time + hard_timeout_seconds
sleep(CHECK_TERMINATE_INTERVAL_SECONDS) while continue_waiting?(deadline)
hard_stop_stuck_pids
end
def trap_signals
SidekiqCluster.trap_terminate do |signal|
@alive = false
SidekiqCluster.signal_processes(@processes, signal)
wait_for_termination
end
SidekiqCluster.trap_forward do |signal|
SidekiqCluster.signal_processes(@processes, signal)
end
end
def start_loop
while @alive
sleep(@interval)
unless SidekiqCluster.all_alive?(@processes)
# If a child process died we'll just terminate the whole cluster. It's up to
# runit and such to then restart the cluster.
@logger.info('A worker terminated, shutting down the cluster')
SidekiqCluster.signal_processes(@processes, :TERM)
break
end
end
end
def option_parser
OptionParser.new do |opt|
opt.banner = "#{File.basename(__FILE__)} [QUEUE,QUEUE] [QUEUE] ... [OPTIONS]"
opt.separator "\nOptions:\n"
opt.on('-h', '--help', 'Shows this help message') do
abort opt.to_s
end
opt.on('-m', '--max-concurrency INT', 'Maximum threads to use with Sidekiq (default: 50, 0 to disable)') do |int|
@max_concurrency = int.to_i
end
opt.on('--min-concurrency INT', 'Minimum threads to use with Sidekiq (default: 0)') do |int|
@min_concurrency = int.to_i
end
opt.on('-e', '--environment ENV', 'The application environment') do |env|
@environment = env
end
opt.on('-P', '--pidfile PATH', 'Path to the PID file') do |pid|
@pid = pid
end
opt.on('-r', '--require PATH', 'Location of the Rails application') do |path|
@rails_path = path
end
opt.on('--experimental-queue-selector', 'EXPERIMENTAL: Run workers based on the provided selector') do |experimental_queue_selector|
@experimental_queue_selector = experimental_queue_selector
end
opt.on('-n', '--negate', 'Run workers for all queues in sidekiq_queues.yml except the given ones') do
@negate_queues = true
end
opt.on('-i', '--interval INT', 'The number of seconds to wait between worker checks') do |int|
@interval = int.to_i
end
opt.on('-t', '--timeout INT', 'Graceful timeout for all running processes') do |timeout|
@soft_timeout_seconds = timeout.to_i
end
opt.on('-d', '--dryrun', 'Print commands that would be run without this flag, and quit') do |int|
@dryrun = true
end
end
end
end
end
end
|
