mastodon/config/initializers/chewy.rb

enabled         = ENV['ES_ENABLED'] == 'true'
host            = ENV.fetch('ES_HOST') { 'localhost' }
port            = ENV.fetch('ES_PORT') { 9200 }
fallback_prefix = ENV.fetch('REDIS_NAMESPACE') { nil }
prefix          = ENV.fetch('ES_PREFIX') { fallback_prefix }

Chewy.settings = {
  host: "#{host}:#{port}",
  prefix: prefix,
  enabled: enabled,
  journal: false,
}

Chewy.root_strategy    = enabled ? :sidekiq : :bypass
Chewy.request_strategy = enabled ? :sidekiq : :bypass

module Chewy
  class << self
    def enabled?
      settings[:enabled]
    end
  end
end