Class: Gitlab::Middleware::BasicHealthCheck

Inherits:
Object
  • Object
show all
Defined in:
lib/gitlab/middleware/basic_health_check.rb

Constant Summary collapse

OK_RESPONSE =

This can’t be frozen because Rails::Rack::Logger wraps the body rubocop:disable Style/MutableConstant

[200, { 'Content-Type' => 'text/plain' }, ["GitLab OK"]]
EMPTY_RESPONSE = 
[404, { 'Content-Type' => 'text/plain' }, [""]]
HEALTH_PATH =

rubocop:enable Style/MutableConstant

'/-/health'

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ BasicHealthCheck

Returns a new instance of BasicHealthCheck.



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# File 'lib/gitlab/middleware/basic_health_check.rb', line 20

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/gitlab/middleware/basic_health_check.rb', line 24

def call(env)
  return @app.call(env) unless env['PATH_INFO'] == HEALTH_PATH

  # We should be using ActionDispatch::Request instead of
  # Rack::Request to be consistent with Rails, but due to a Rails
  # bug described in
  # https://gitlab.com/gitlab-org/gitlab-foss/issues/58573#note_149799010
  # hosts behind a load balancer will only see 127.0.0.1 for the
  # load balancer's IP.
  request = Rack::Request.new(env)

  return OK_RESPONSE if client_ip_whitelisted?(request)

  EMPTY_RESPONSE
end

#client_ip_whitelisted?(request) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gitlab/middleware/basic_health_check.rb', line 40

def client_ip_whitelisted?(request)
  ip_whitelist.any? { |e| e.include?(request.ip) }
end

#ip_whitelist ⇒ Object 



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# File 'lib/gitlab/middleware/basic_health_check.rb', line 44

def ip_whitelist
  @ip_whitelist ||= Settings.monitoring.ip_whitelist.map(&IPAddr.method(:new))
end