forked from mirror/go-ethereum
cmd, ethstats, les, mobile, params: native netstats (#3336)
Péter Szilágyi
8 years ago
committed by
Felix Lange
parent
d1a95c643e
commit
4c8c5e2f74
@ -0,0 +1,452 @@ |
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// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package ethstats implements the network stats reporting service.
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package ethstats |
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import ( |
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"encoding/json" |
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"errors" |
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"fmt" |
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"math/big" |
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"regexp" |
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"runtime" |
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"strconv" |
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"time" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/core" |
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"github.com/ethereum/go-ethereum/core/types" |
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"github.com/ethereum/go-ethereum/eth" |
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"github.com/ethereum/go-ethereum/event" |
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"github.com/ethereum/go-ethereum/les" |
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"github.com/ethereum/go-ethereum/logger" |
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"github.com/ethereum/go-ethereum/logger/glog" |
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"github.com/ethereum/go-ethereum/node" |
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"github.com/ethereum/go-ethereum/p2p" |
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"github.com/ethereum/go-ethereum/rpc" |
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"golang.org/x/net/websocket" |
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) |
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// Service implements an Ethereum netstats reporting daemon that pushes local
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// chain statistics up to a monitoring server.
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type Service struct { |
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stack *node.Node // Temporary workaround, remove when API finalized
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server *p2p.Server // Peer-to-peer server to retrieve networking infos
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eth *eth.Ethereum // Full Ethereum service if monitoring a full node
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les *les.LightEthereum // Light Ethereum service if monitoring a light node
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node string // Name of the node to display on the monitoring page
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pass string // Password to authorize access to the monitoring page
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host string // Remote address of the monitoring service
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} |
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// New returns a monitoring service ready for stats reporting.
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func New(url string, ethServ *eth.Ethereum, lesServ *les.LightEthereum) (*Service, error) { |
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// Parse the netstats connection url
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re := regexp.MustCompile("([^:@]*)(:([^@]*))?@(.+)") |
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parts := re.FindStringSubmatch(url) |
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if len(parts) != 5 { |
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return nil, fmt.Errorf("invalid netstats url: \"%s\", should be nodename:secret@host:port", url) |
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} |
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// Assemble and return the stats service
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return &Service{ |
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eth: ethServ, |
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les: lesServ, |
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node: parts[1], |
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pass: parts[3], |
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host: parts[4], |
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}, nil |
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} |
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// Protocols implements node.Service, returning the P2P network protocols used
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// by the stats service (nil as it doesn't use the devp2p overlay network).
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func (s *Service) Protocols() []p2p.Protocol { return nil } |
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// APIs implements node.Service, returning the RPC API endpoints provided by the
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// stats service (nil as it doesn't provide any user callable APIs).
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func (s *Service) APIs() []rpc.API { return nil } |
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// Start implements node.Service, starting up the monitoring and reporting daemon.
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func (s *Service) Start(server *p2p.Server) error { |
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s.server = server |
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go s.loop() |
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glog.V(logger.Info).Infoln("Stats daemon started") |
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return nil |
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} |
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// Stop implements node.Service, terminating the monitoring and reporting daemon.
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func (s *Service) Stop() error { |
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glog.V(logger.Info).Infoln("Stats daemon stopped") |
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return nil |
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} |
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// loop keeps trying to connect to the netstats server, reporting chain events
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// until termination.
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func (s *Service) loop() { |
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// Subscribe tso chain events to execute updates on
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var emux *event.TypeMux |
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if s.eth != nil { |
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emux = s.eth.EventMux() |
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} else { |
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emux = s.les.EventMux() |
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} |
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headSub := emux.Subscribe(core.ChainHeadEvent{}) |
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defer headSub.Unsubscribe() |
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txSub := emux.Subscribe(core.TxPreEvent{}) |
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defer txSub.Unsubscribe() |
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// Loop reporting until termination
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for { |
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// Establish a websocket connection to the server and authenticate the node
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conn, err := websocket.Dial(fmt.Sprintf("wss://%s/api", s.host), "", "http://localhost/") |
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if err != nil { |
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glog.V(logger.Warn).Infof("Stats server unreachable: %v", err) |
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time.Sleep(10 * time.Second) |
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continue |
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} |
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in := json.NewDecoder(conn) |
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out := json.NewEncoder(conn) |
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if err = s.login(in, out); err != nil { |
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glog.V(logger.Warn).Infof("Stats login failed: %v", err) |
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conn.Close() |
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time.Sleep(10 * time.Second) |
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continue |
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} |
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if err = s.report(in, out); err != nil { |
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glog.V(logger.Warn).Infof("Initial stats report failed: %v", err) |
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conn.Close() |
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continue |
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} |
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// Keep sending status updates until the connection breaks
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fullReport := time.NewTicker(15 * time.Second) |
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for err == nil { |
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select { |
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case <-fullReport.C: |
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if err = s.report(in, out); err != nil { |
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glog.V(logger.Warn).Infof("Full stats report failed: %v", err) |
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} |
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case <-headSub.Chan(): |
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// Exhaust events to avoid reporting too frequently
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for exhausted := false; !exhausted; { |
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select { |
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case <-headSub.Chan(): |
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default: |
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exhausted = true |
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} |
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} |
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if err = s.reportBlock(out); err != nil { |
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glog.V(logger.Warn).Infof("Block stats report failed: %v", err) |
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} |
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case <-txSub.Chan(): |
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// Exhaust events to avoid reporting too frequently
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for exhausted := false; !exhausted; { |
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select { |
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case <-headSub.Chan(): |
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default: |
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exhausted = true |
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} |
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} |
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if err = s.reportPending(out); err != nil { |
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glog.V(logger.Warn).Infof("Transaction stats report failed: %v", err) |
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} |
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} |
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} |
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// Make sure the connection is closed
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conn.Close() |
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} |
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} |
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// nodeInfo is the collection of metainformation about a node that is displayed
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// on the monitoring page.
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type nodeInfo struct { |
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Name string `json:"name"` |
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Node string `json:"node"` |
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Port int `json:"port"` |
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Network string `json:"net"` |
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Protocol string `json:"protocol"` |
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API string `json:"api"` |
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Os string `json:"os"` |
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OsVer string `json:"os_v"` |
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Client string `json:"client"` |
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} |
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// authMsg is the authentication infos needed to login to a monitoring server.
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type authMsg struct { |
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Id string `json:"id"` |
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Info nodeInfo `json:"info"` |
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Secret string `json:"secret"` |
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} |
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// login tries to authorize the client at the remote server.
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func (s *Service) login(in *json.Decoder, out *json.Encoder) error { |
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// Construct and send the login authentication
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infos := s.server.NodeInfo() |
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var network, protocol string |
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if info := infos.Protocols["eth"]; info != nil { |
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network = strconv.Itoa(info.(*eth.EthNodeInfo).Network) |
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protocol = fmt.Sprintf("eth/%d", eth.ProtocolVersions[0]) |
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} else { |
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network = strconv.Itoa(infos.Protocols["les"].(*eth.EthNodeInfo).Network) |
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protocol = fmt.Sprintf("les/%d", les.ProtocolVersions[0]) |
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} |
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auth := &authMsg{ |
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Id: s.node, |
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Info: nodeInfo{ |
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Name: s.node, |
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Node: infos.Name, |
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Port: infos.Ports.Listener, |
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Network: network, |
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Protocol: protocol, |
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API: "No", |
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Os: runtime.GOOS, |
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OsVer: runtime.GOARCH, |
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Client: "0.1.1", |
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}, |
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Secret: s.pass, |
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} |
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login := map[string][]interface{}{ |
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"emit": []interface{}{"hello", auth}, |
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} |
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if err := out.Encode(login); err != nil { |
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return err |
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} |
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// Retrieve the remote ack or connection termination
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var ack map[string][]string |
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if err := in.Decode(&ack); err != nil || len(ack["emit"]) != 1 || ack["emit"][0] != "ready" { |
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return errors.New("unauthorized") |
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} |
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return nil |
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} |
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// report collects all possible data to report and send it to the stats server.
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// This should only be used on reconnects or rarely to avoid overloading the
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// server. Use the individual methods for reporting subscribed events.
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func (s *Service) report(in *json.Decoder, out *json.Encoder) error { |
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if err := s.reportLatency(in, out); err != nil { |
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return err |
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} |
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if err := s.reportBlock(out); err != nil { |
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return err |
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} |
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if err := s.reportPending(out); err != nil { |
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return err |
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} |
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if err := s.reportStats(out); err != nil { |
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return err |
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} |
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return nil |
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} |
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// reportLatency sends a ping request to the server, measures the RTT time and
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// finally sends a latency update.
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func (s *Service) reportLatency(in *json.Decoder, out *json.Encoder) error { |
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// Send the current time to the ethstats server
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start := time.Now() |
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ping := map[string][]interface{}{ |
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"emit": []interface{}{"node-ping", map[string]string{ |
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"id": s.node, |
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"clientTime": start.String(), |
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}}, |
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} |
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if err := out.Encode(ping); err != nil { |
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return err |
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} |
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// Wait for the pong request to arrive back
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var pong map[string][]interface{} |
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if err := in.Decode(&pong); err != nil || len(pong["emit"]) != 2 || pong["emit"][0].(string) != "node-pong" { |
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return errors.New("unexpected ping reply") |
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} |
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// Send back the measured latency
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latency := map[string][]interface{}{ |
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"emit": []interface{}{"latency", map[string]string{ |
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"id": s.node, |
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"latency": strconv.Itoa(int((time.Since(start) / time.Duration(2)).Nanoseconds() / 1000000)), |
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}}, |
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} |
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if err := out.Encode(latency); err != nil { |
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return err |
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} |
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return nil |
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} |
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// blockStats is the information to report about individual blocks.
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type blockStats struct { |
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Number *big.Int `json:"number"` |
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Hash common.Hash `json:"hash"` |
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Diff string `json:"difficulty"` |
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TotalDiff string `json:"totalDifficulty"` |
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Txs txStats `json:"transactions"` |
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Uncles uncleStats `json:"uncles"` |
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} |
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// txStats is a custom wrapper around a transaction array to force serializing
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// empty arrays instead of returning null for them.
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type txStats []*types.Transaction |
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func (s txStats) MarshalJSON() ([]byte, error) { |
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if txs := ([]*types.Transaction)(s); len(txs) > 0 { |
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return json.Marshal(txs) |
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} |
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return []byte("[]"), nil |
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} |
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// uncleStats is a custom wrapper around an uncle array to force serializing
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// empty arrays instead of returning null for them.
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type uncleStats []*types.Header |
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func (s uncleStats) MarshalJSON() ([]byte, error) { |
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if uncles := ([]*types.Header)(s); len(uncles) > 0 { |
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return json.Marshal(uncles) |
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} |
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return []byte("[]"), nil |
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} |
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// reportBlock retrieves the current chain head and repors it to the stats server.
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func (s *Service) reportBlock(out *json.Encoder) error { |
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// Gather the head block infos from the local blockchain
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var ( |
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head *types.Header |
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td *big.Int |
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txs []*types.Transaction |
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uncles []*types.Header |
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) |
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if s.eth != nil { |
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// Full nodes have all needed information available
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block := s.eth.BlockChain().CurrentBlock() |
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head = s.eth.BlockChain().CurrentHeader() |
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td = s.eth.BlockChain().GetTd(head.Hash(), head.Number.Uint64()) |
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txs = block.Transactions() |
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uncles = block.Uncles() |
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} else { |
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// Light nodes would need on-demand lookups for transactions/uncles, skip
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head = s.les.BlockChain().CurrentHeader() |
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td = s.les.BlockChain().GetTd(head.Hash(), head.Number.Uint64()) |
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} |
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// Assemble the block stats report and send it to the server
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stats := map[string]interface{}{ |
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"id": s.node, |
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"block": &blockStats{ |
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Number: head.Number, |
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Hash: head.Hash(), |
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Diff: head.Difficulty.String(), |
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TotalDiff: td.String(), |
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Txs: txs, |
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Uncles: uncles, |
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}, |
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} |
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report := map[string][]interface{}{ |
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"emit": []interface{}{"block", stats}, |
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} |
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if err := out.Encode(report); err != nil { |
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return err |
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} |
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return nil |
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} |
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// pendStats is the information to report about pending transactions.
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type pendStats struct { |
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Pending int `json:"pending"` |
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} |
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// reportPending retrieves the current number of pending transactions and reports
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// it to the stats server.
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func (s *Service) reportPending(out *json.Encoder) error { |
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// Retrieve the pending count from the local blockchain
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var pending int |
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if s.eth != nil { |
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pending, _ = s.eth.TxPool().Stats() |
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} else { |
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pending = s.les.TxPool().Stats() |
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} |
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// Assemble the transaction stats and send it to the server
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stats := map[string]interface{}{ |
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"id": s.node, |
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"stats": &pendStats{ |
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Pending: pending, |
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}, |
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} |
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report := map[string][]interface{}{ |
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"emit": []interface{}{"pending", stats}, |
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} |
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if err := out.Encode(report); err != nil { |
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return err |
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} |
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return nil |
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} |
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// blockStats is the information to report about the local node.
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type nodeStats struct { |
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Active bool `json:"active"` |
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Syncing bool `json:"syncing"` |
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Mining bool `json:"mining"` |
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Hashrate int `json:"hashrate"` |
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Peers int `json:"peers"` |
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GasPrice int `json:"gasPrice"` |
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Uptime int `json:"uptime"` |
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} |
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// reportPending retrieves various stats about the node at the networking and
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// mining layer and reports it to the stats server.
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func (s *Service) reportStats(out *json.Encoder) error { |
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// Gather the syncing and mining infos from the local miner instance
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var ( |
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mining bool |
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hashrate int |
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syncing bool |
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gasprice int |
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) |
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if s.eth != nil { |
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mining = s.eth.Miner().Mining() |
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hashrate = int(s.eth.Miner().HashRate()) |
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sync := s.eth.Downloader().Progress() |
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syncing = s.eth.BlockChain().CurrentHeader().Number.Uint64() >= sync.HighestBlock |
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gasprice = int(s.eth.Miner().GasPrice().Uint64()) |
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} else { |
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sync := s.les.Downloader().Progress() |
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syncing = s.les.BlockChain().CurrentHeader().Number.Uint64() >= sync.HighestBlock |
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} |
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stats := map[string]interface{}{ |
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"id": s.node, |
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"stats": &nodeStats{ |
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Active: true, |
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Mining: mining, |
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Hashrate: hashrate, |
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Peers: s.server.PeerCount(), |
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GasPrice: gasprice, |
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Syncing: syncing, |
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Uptime: 100, |
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}, |
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} |
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report := map[string][]interface{}{ |
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"emit": []interface{}{"stats", stats}, |
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} |
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if err := out.Encode(report); err != nil { |
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return err |
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} |
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return nil |
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} |
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