module Chef::Formatters::APIErrorFormatting

Constants

NETWORK_ERROR_CLASSES

Public Instance Methods

api_key() click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 154
def api_key
  config[:client_key]
end
clock_skew?() click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 162
def clock_skew?
  exception.response.body =~ /synchronize the clock/i
end
describe_400_error(error_description) click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 100
      def describe_400_error(error_description)
        error_description.section("Invalid Request Data:", <<~E)
          The data in your request was invalid (HTTP 400).
        E
        error_description.section("Server Response:", format_rest_error)
      end
describe_401_error(error_description) click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 76
      def describe_401_error(error_description)
        if clock_skew?
          error_description.section("Authentication Error:", <<~E)
            Failed to authenticate to the chef server (http 401).
            The request failed because your clock has drifted by more than 15 minutes.
            Syncing your clock to an NTP Time source should resolve the issue.
          E
        else
          error_description.section("Authentication Error:", <<~E)
            Failed to authenticate to the chef server (http 401).
          E

          error_description.section("Server Response:", format_rest_error)
          error_description.section("Relevant Config Settings:", <<~E)
            chef_server_url   "#{server_url}"
            node_name         "#{username}"
            client_key        "#{api_key}"

            If these settings are correct, your client_key may be invalid, or
            you may have a chef user with the same client name as this node.
          E
        end
      end
describe_406_error(error_description, response) click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 107
      def describe_406_error(error_description, response)
        if response["x-ops-server-api-version"]
          version_header = Chef::JSONCompat.from_json(response["x-ops-server-api-version"])
          client_api_version = version_header["request_version"]
          min_server_version = version_header["min_version"]
          max_server_version = version_header["max_version"]

          error_description.section("Incompatible server API version:", <<~E)
            This version of the API that this request specified is not supported by the server you sent this request to.
            The server supports a min API version of #{min_server_version} and a max API version of #{max_server_version}.
            #{Chef::Dist::PRODUCT} just made a request with an API version of #{client_api_version}.
            Please either update your #{Chef::Dist::PRODUCT} or the server to be a compatible set.
          E
        else
          describe_http_error(error_description)
        end
      end
describe_500_error(error_description) click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 125
      def describe_500_error(error_description)
        error_description.section("Unknown Server Error:", <<~E)
          The server had a fatal error attempting to load the node data.
        E
        error_description.section("Server Response:", format_rest_error)
      end
describe_503_error(error_description) click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 132
def describe_503_error(error_description)
  error_description.section("Server Unavailable", "The #{Chef::Dist::SERVER_PRODUCT} is temporarily unavailable")
  error_description.section("Server Response:", format_rest_error)
end
describe_eof_error(error_description) click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 40
      def describe_eof_error(error_description)
        error_description.section("Authentication Error:", <<~E)
          Received an EOF on transport socket.  This almost always indicates a network
          error external to #{Chef::Dist::CLIENT}.  Some causes include:

            - Blocking ICMP Dest Unreachable (breaking Path MTU Discovery)
            - IPsec or VPN tunnelling / TCP Encapsulation MTU issues
            - Jumbo frames configured only on one side (breaking Path MTU)
            - Jumbo frames configured on a LAN that does not support them
            - Proxies or Load Balancers breaking large POSTs
            - Broken TCP offload in network drivers/hardware

          Try sending large pings to the destination:

             windows:  ping server.example.com -f -l 9999
             unix:  ping server.example.com -s 9999

          Try sending large POSTs to the destination (any HTTP code returned is success):

             e.g.:  curl http://server.example.com/`printf '%*s' 9999 '' | tr ' ' 'a'`

          Try disabling TCP Offload Engines (TOE) in your ethernet drivers.

            windows:
              Disable-NetAdapterChecksumOffload * -TcpIPv4 -UdpIPv4 -IpIPv4 -NoRestart
              Disable-NetAdapterLso * -IPv4 -NoRestart
              Set-NetAdapterAdvancedProperty * -DisplayName "Large Receive Offload (IPv4)" -DisplayValue Disabled –NoRestart
              Restart-NetAdapter *
            unix(bash):
              for i in rx tx sg tso ufo gso gro lro rxvlan txvlan rxhash; do /sbin/ethtool -K eth0 $i off; done

          In some cases the underlying virtualization layer (Xen, VMware, KVM, Hyper-V, etc) may have
          broken virtual networking code.
        E
      end
describe_http_error(error_description) click to toggle source

Fallback for unexpected/uncommon http errors

# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 138
def describe_http_error(error_description)
  error_description.section("Unexpected API Request Failure:", format_rest_error)
end
describe_network_errors(error_description) click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 29
      def describe_network_errors(error_description)
        error_description.section("Networking Error:", <<~E)
          #{exception.message}

          Your chef_server_url may be misconfigured, or the network could be down.
        E
        error_description.section("Relevant Config Settings:", <<~E)
          chef_server_url  "#{server_url}"
        E
      end
format_rest_error() click to toggle source

Parses JSON from the error response sent by Chef Server and returns the error message

# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 144
def format_rest_error
  Array(Chef::JSONCompat.from_json(exception.response.body)["error"]).join("; ")
rescue Exception
  safe_format_rest_error
end
safe_format_rest_error() click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 166
def safe_format_rest_error
  # When we get 504 from the server, sometimes the response body is non-readable.
  #
  # Stack trace:
  #
  # NoMethodError: undefined method `closed?' for nil:NilClass
  # .../lib/ruby/1.9.1/net/http.rb:2789:in `stream_check'
  # .../lib/ruby/1.9.1/net/http.rb:2709:in `read_body'
  # .../lib/ruby/1.9.1/net/http.rb:2736:in `body'
  # .../lib/chef/formatters/error_inspectors/api_error_formatting.rb:91:in `rescue in format_rest_error'

  exception.response.body
rescue Exception
  "Cannot fetch the contents of the response."
end
server_url() click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 158
def server_url
  config[:chef_server_url]
end
username() click to toggle source
# File lib/chef/formatters/error_inspectors/api_error_formatting.rb, line 150
def username
  config[:node_name]
end