Module: Chef::Formatters::APIErrorFormatting

Constant Summary collapse

NETWORK_ERROR_CLASSES =
[Errno::ECONNREFUSED, Timeout::Error, Errno::ETIMEDOUT, SocketError].freeze

Instance Method Summary collapse

Instance Method Details

#api_keyObject


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 155

def api_key
  config[:client_key]
end

#clock_skew?Boolean

Returns:

  • (Boolean)

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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 163

def clock_skew?
  exception.response.body =~ /synchronize the clock/i
end

#describe_400_error(error_description) ⇒ Object


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 101

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) ⇒ Object


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 77

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) ⇒ Object


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 108

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}.
      #{ChefUtils::Dist::Infra::PRODUCT} just made a request with an API version of #{client_api_version}.
      Please either update your #{ChefUtils::Dist::Infra::PRODUCT} or the server to be a compatible set.
    E
  else
    describe_http_error(error_description)
  end
end

#describe_500_error(error_description) ⇒ Object


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 126

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) ⇒ Object


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 133

def describe_503_error(error_description)
  error_description.section("Server Unavailable", "The #{ChefUtils::Dist::Server::PRODUCT} is temporarily unavailable")
  error_description.section("Server Response:", format_rest_error)
end

#describe_eof_error(error_description) ⇒ Object


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 41

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 #{ChefUtils::Dist::Infra::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) ⇒ Object

Fallback for unexpected/uncommon http errors


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 139

def describe_http_error(error_description)
  error_description.section("Unexpected API Request Failure:", format_rest_error)
end

#describe_network_errors(error_description) ⇒ Object


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 30

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_errorObject

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


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 145

def format_rest_error
  Array(Chef::JSONCompat.from_json(exception.response.body)["error"]).join("; ")
rescue Exception
  safe_format_rest_error
end

#safe_format_rest_errorObject


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 167

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_urlObject


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 159

def server_url
  config[:chef_server_url]
end

#usernameObject


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# File 'lib/chef/formatters/error_inspectors/api_error_formatting.rb', line 151

def username
  config[:node_name]
end