279 lines
8.5 KiB
Go
279 lines
8.5 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// go-ethereum 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package main
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import (
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"encoding/json"
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"os"
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"sort"
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"strings"
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"sync"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/log"
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"github.com/olekukonko/tablewriter"
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)
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// networkStats verifies the status of network components and generates a protip
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// configuration set to give users hints on how to do various tasks.
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func (w *wizard) networkStats() {
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if len(w.servers) == 0 {
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log.Info("No remote machines to gather stats from")
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return
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}
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// Clear out some previous configs to refill from current scan
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w.conf.ethstats = ""
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w.conf.bootnodes = w.conf.bootnodes[:0]
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// Iterate over all the specified hosts and check their status
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var pend sync.WaitGroup
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stats := make(serverStats)
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for server, pubkey := range w.conf.Servers {
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pend.Add(1)
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// Gather the service stats for each server concurrently
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go func(server string, pubkey []byte) {
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defer pend.Done()
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stat := w.gatherStats(server, pubkey, w.servers[server])
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// All status checks complete, report and check next server
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w.lock.Lock()
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defer w.lock.Unlock()
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delete(w.services, server)
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for service := range stat.services {
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w.services[server] = append(w.services[server], service)
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}
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stats[server] = stat
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}(server, pubkey)
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}
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pend.Wait()
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// Print any collected stats and return
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stats.render()
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}
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// gatherStats gathers service statistics for a particular remote server.
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func (w *wizard) gatherStats(server string, pubkey []byte, client *sshClient) *serverStat {
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// Gather some global stats to feed into the wizard
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var (
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genesis string
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ethstats string
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bootnodes []string
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)
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// Ensure a valid SSH connection to the remote server
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logger := log.New("server", server)
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logger.Info("Starting remote server health-check")
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stat := &serverStat{
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address: client.address,
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services: make(map[string]map[string]string),
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}
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if client == nil {
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conn, err := dial(server, pubkey)
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if err != nil {
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logger.Error("Failed to establish remote connection", "err", err)
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stat.failure = err.Error()
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return stat
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}
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client = conn
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}
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// Client connected one way or another, run health-checks
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logger.Debug("Checking for nginx availability")
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if infos, err := checkNginx(client, w.network); err != nil {
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if err != ErrServiceUnknown {
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stat.services["nginx"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["nginx"] = infos.Report()
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}
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logger.Debug("Checking for ethstats availability")
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if infos, err := checkEthstats(client, w.network); err != nil {
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if err != ErrServiceUnknown {
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stat.services["ethstats"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["ethstats"] = infos.Report()
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ethstats = infos.config
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}
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logger.Debug("Checking for bootnode availability")
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if infos, err := checkNode(client, w.network, true); err != nil {
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if err != ErrServiceUnknown {
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stat.services["bootnode"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["bootnode"] = infos.Report()
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genesis = string(infos.genesis)
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bootnodes = append(bootnodes, infos.enode)
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}
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logger.Debug("Checking for sealnode availability")
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if infos, err := checkNode(client, w.network, false); err != nil {
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if err != ErrServiceUnknown {
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stat.services["sealnode"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["sealnode"] = infos.Report()
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genesis = string(infos.genesis)
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}
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logger.Debug("Checking for explorer availability")
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if infos, err := checkExplorer(client, w.network); err != nil {
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if err != ErrServiceUnknown {
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stat.services["explorer"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["explorer"] = infos.Report()
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}
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logger.Debug("Checking for wallet availability")
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if infos, err := checkWallet(client, w.network); err != nil {
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if err != ErrServiceUnknown {
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stat.services["wallet"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["wallet"] = infos.Report()
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}
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logger.Debug("Checking for faucet availability")
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if infos, err := checkFaucet(client, w.network); err != nil {
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if err != ErrServiceUnknown {
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stat.services["faucet"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["faucet"] = infos.Report()
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}
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logger.Debug("Checking for dashboard availability")
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if infos, err := checkDashboard(client, w.network); err != nil {
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if err != ErrServiceUnknown {
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stat.services["dashboard"] = map[string]string{"offline": err.Error()}
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}
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} else {
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stat.services["dashboard"] = infos.Report()
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}
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// Feed and newly discovered information into the wizard
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w.lock.Lock()
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defer w.lock.Unlock()
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if genesis != "" && w.conf.Genesis == nil {
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g := new(core.Genesis)
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if err := json.Unmarshal([]byte(genesis), g); err != nil {
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log.Error("Failed to parse remote genesis", "err", err)
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} else {
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w.conf.Genesis = g
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}
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}
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if ethstats != "" {
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w.conf.ethstats = ethstats
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}
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w.conf.bootnodes = append(w.conf.bootnodes, bootnodes...)
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return stat
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}
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// serverStat is a collection of service configuration parameters and health
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// check reports to print to the user.
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type serverStat struct {
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address string
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failure string
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services map[string]map[string]string
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}
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// serverStats is a collection of server stats for multiple hosts.
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type serverStats map[string]*serverStat
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// render converts the gathered statistics into a user friendly tabular report
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// and prints it to the standard output.
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func (stats serverStats) render() {
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// Start gathering service statistics and config parameters
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table := tablewriter.NewWriter(os.Stdout)
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table.SetHeader([]string{"Server", "Address", "Service", "Config", "Value"})
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table.SetAlignment(tablewriter.ALIGN_LEFT)
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table.SetColWidth(100)
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// Find the longest lines for all columns for the hacked separator
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separator := make([]string, 5)
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for server, stat := range stats {
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if len(server) > len(separator[0]) {
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separator[0] = strings.Repeat("-", len(server))
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}
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if len(stat.address) > len(separator[1]) {
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separator[1] = strings.Repeat("-", len(stat.address))
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}
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for service, configs := range stat.services {
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if len(service) > len(separator[2]) {
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separator[2] = strings.Repeat("-", len(service))
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}
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for config, value := range configs {
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if len(config) > len(separator[3]) {
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separator[3] = strings.Repeat("-", len(config))
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}
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if len(value) > len(separator[4]) {
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separator[4] = strings.Repeat("-", len(value))
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}
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}
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}
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}
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// Fill up the server report in alphabetical order
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servers := make([]string, 0, len(stats))
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for server := range stats {
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servers = append(servers, server)
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}
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sort.Strings(servers)
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for i, server := range servers {
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// Add a separator between all servers
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if i > 0 {
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table.Append(separator)
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}
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// Fill up the service report in alphabetical order
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services := make([]string, 0, len(stats[server].services))
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for service := range stats[server].services {
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services = append(services, service)
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}
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sort.Strings(services)
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if len(services) == 0 {
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table.Append([]string{server, stats[server].address, "", "", ""})
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}
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for j, service := range services {
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// Add an empty line between all services
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if j > 0 {
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table.Append([]string{"", "", "", separator[3], separator[4]})
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}
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// Fill up the config report in alphabetical order
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configs := make([]string, 0, len(stats[server].services[service]))
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for service := range stats[server].services[service] {
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configs = append(configs, service)
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}
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sort.Strings(configs)
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for k, config := range configs {
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switch {
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case j == 0 && k == 0:
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table.Append([]string{server, stats[server].address, service, config, stats[server].services[service][config]})
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case k == 0:
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table.Append([]string{"", "", service, config, stats[server].services[service][config]})
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default:
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table.Append([]string{"", "", "", config, stats[server].services[service][config]})
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}
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}
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}
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}
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table.Render()
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}
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