gitlab-org--gitlab-foss/lib/gitlab/request_context.rb
Stan Hu 01203e7188 Fix health checks not working behind load balancers
The change in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24199 caused
requests coming from a load balancer to arrive as 127.0.0.1 instead of
the actual IP.

`Rack::Request#ip` behaves slightly differently different than
`ActionDispatch::Request#remote_ip`: the former will return the first
X-Forwarded-For IP if all of the IPs are trusted proxies, while the
second one filters out all proxies and falls back to REMOTE_ADDR, which
is 127.0.0.1.

For now, we can revert back to using `Rack::Request` because these
middlewares don't manipulate parameters. The actual fix problem involves
fixing Rails: https://github.com/rails/rails/issues/28436.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/58573
2019-03-12 12:46:40 -07:00

29 lines
696 B
Ruby

# frozen_string_literal: true
module Gitlab
class RequestContext
class << self
def client_ip
Gitlab::SafeRequestStore[:client_ip]
end
end
def initialize(app)
@app = app
end
def call(env)
# 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-ce/issues/58573#note_149799010
# hosts behind a load balancer will only see 127.0.0.1 for the
# load balancer's IP.
req = Rack::Request.new(env)
Gitlab::SafeRequestStore[:client_ip] = req.ip
@app.call(env)
end
end
end