How to disable “Cannot Render Console from…” on Rails

Question

I\'m using Ubuntu/vagrant as my development environment. I\'m getting these messages on rails console:

Started GET \"/assets/home-fcec5b5a277ac7c20cc9f45a209         


        

Answer 1

For development environment: Detect if it's docker, then determine the IP address and whitelist it

# config/environments/development.rb
require 'socket'
require 'ipaddr'

Rails.application.configure do
  ...

  # When inside a docker container
  if File.file?('/.dockerenv')
    # Whitelist docker ip for web console
    # Cannot render console from 172.27.0.1! Allowed networks: 127.0.0.1
    Socket.ip_address_list.each do |addrinfo|
      next unless addrinfo.ipv4?
      next if addrinfo.ip_address == "127.0.0.1" # Already whitelisted

      ip = IPAddr.new(addrinfo.ip_address).mask(24)

      Logger.new(STDOUT).info "Adding #{ip.inspect} to config.web_console.whitelisted_ips"

      config.web_console.whitelisted_ips << ip
    end
  end
end

For me this prints the following and the warning goes away