mastodon-glitch/lib/mastodon/redis_configuration.rb

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# frozen_string_literal: true
class Mastodon::RedisConfiguration
DEFAULTS = {
host: 'localhost',
port: 6379,
db: 0,
}.freeze
def base
@base ||= setup_config(prefix: nil, defaults: DEFAULTS)
.merge(namespace: base_namespace)
end
def sidekiq
@sidekiq ||= setup_config(prefix: 'SIDEKIQ_')
.merge(namespace: sidekiq_namespace)
end
def cache
@cache ||= setup_config(prefix: 'CACHE_')
.merge({
namespace: cache_namespace,
expires_in: 10.minutes,
connect_timeout: 5,
pool: {
size: Sidekiq.server? ? Sidekiq[:concurrency] : Integer(ENV['MAX_THREADS'] || 5),
timeout: 5,
},
})
end
private
def driver
ENV['REDIS_DRIVER'] == 'ruby' ? :ruby : :hiredis
end
def namespace
@namespace ||= ENV.fetch('REDIS_NAMESPACE', nil)
end
def base_namespace
return "mastodon_test#{ENV.fetch('TEST_ENV_NUMBER', nil)}" if Rails.env.test?
namespace
end
def sidekiq_namespace
namespace
end
def cache_namespace
namespace ? "#{namespace}_cache" : 'cache'
end
def setup_config(prefix: nil, defaults: {})
prefix = "#{prefix}REDIS_"
url = ENV.fetch("#{prefix}URL", nil)
user = ENV.fetch("#{prefix}USER", nil)
password = ENV.fetch("#{prefix}PASSWORD", nil)
host = ENV.fetch("#{prefix}HOST", defaults[:host])
port = ENV.fetch("#{prefix}PORT", defaults[:port])
db = ENV.fetch("#{prefix}DB", defaults[:db])
return { url:, driver: } if url
sentinel_options = setup_sentinels(prefix, default_user: user, default_password: password)
if sentinel_options.present?
host = sentinel_options[:name]
port = nil
db ||= 0
end
url = construct_uri(host, port, db, user, password)
if url.present?
{ url:, driver: }.merge(sentinel_options)
else
# Fall back to base config, which has defaults for the URL
# so this cannot lead to endless recursion.
base
end
end
def setup_sentinels(prefix, default_user: nil, default_password: nil)
name = ENV.fetch("#{prefix}SENTINEL_MASTER", nil)
sentinel_port = ENV.fetch("#{prefix}SENTINEL_PORT", 26_379)
sentinel_list = ENV.fetch("#{prefix}SENTINELS", nil)
sentinel_username = ENV.fetch("#{prefix}SENTINEL_USERNAME", default_user)
sentinel_password = ENV.fetch("#{prefix}SENTINEL_PASSWORD", default_password)
sentinels = parse_sentinels(sentinel_list, default_port: sentinel_port)
if name.present? && sentinels.present?
{ name:, sentinels:, sentinel_username:, sentinel_password: }
else
{}
end
end
def construct_uri(host, port, db, user, password)
return nil if host.blank?
Addressable::URI.parse("redis://#{host}:#{port}/#{db}").tap do |uri|
uri.user = user if user.present?
uri.password = password if password.present?
end.normalize.to_str
end
def parse_sentinels(sentinels_string, default_port: 26_379)
(sentinels_string || '').split(',').map do |sentinel|
host, port = sentinel.split(':')
port = (port || default_port).to_i
{ host: host, port: port }
end.presence
end
end