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// Copyright 2017 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"bytes"
"fmt"
"math/rand"
"path/filepath"
"strconv"
"strings"
"text/template"
"github.com/ethereum/go-ethereum/log"
)
// nodeDockerfile is the Dockerfile required to run an Ethereum node.
var nodeDockerfile = `
FROM ethereum/client-go:alpine-develop
ADD genesis.json /genesis.json
{{if .Unlock}}
ADD signer.json /signer.json
ADD signer.pass /signer.pass
{{end}}
RUN \
echo '/geth init /genesis.json' > geth.sh && \{{if .Unlock}}
echo 'mkdir -p /root/.ethereum/keystore/ && cp /signer.json /root/.ethereum/keystore/' >> geth.sh && \{{end}}
echo $'/geth --networkid {{.NetworkID}} --cache 512 --port {{.Port}} --maxpeers {{.Peers}} {{.LightFlag}} --ethstats \'{{.Ethstats}}\' {{if .Bootnodes}}--bootnodes {{.Bootnodes}}{{end}} {{if .Etherbase}}--etherbase {{.Etherbase}} --mine{{end}}{{if .Unlock}}--unlock 0 --password /signer.pass --mine{{end}}' >> geth.sh
ENTRYPOINT ["/bin/sh", "geth.sh"]
`
// nodeComposefile is the docker-compose.yml file required to deploy and maintain
// an Ethereum node (bootnode or miner for now).
var nodeComposefile = `
version: '2'
services:
{{.Type}}:
build: .
image: {{.Network}}/{{.Type}}
ports:
- "{{.FullPort}}:{{.FullPort}}"
- "{{.FullPort}}:{{.FullPort}}/udp"{{if .Light}}
- "{{.LightPort}}:{{.LightPort}}/udp"{{end}}
volumes:
- {{.Datadir}}:/root/.ethereum
environment:
- FULL_PORT={{.FullPort}}/tcp
- LIGHT_PORT={{.LightPort}}/udp
- TOTAL_PEERS={{.TotalPeers}}
- LIGHT_PEERS={{.LightPeers}}
- STATS_NAME={{.Ethstats}}
- MINER_NAME={{.Etherbase}}
restart: always
`
// deployNode deploys a new Ethereum node container to a remote machine via SSH,
// docker and docker-compose. If an instance with the specified network name
// already exists there, it will be overwritten!
func deployNode(client *sshClient, network string, bootnodes []string, config *nodeInfos) ([]byte, error) {
kind := "sealnode"
if config.keyJSON == "" && config.etherbase == "" {
kind = "bootnode"
bootnodes = make([]string, 0)
}
// Generate the content to upload to the server
workdir := fmt.Sprintf("%d", rand.Int63())
files := make(map[string][]byte)
lightFlag := ""
if config.peersLight > 0 {
lightFlag = fmt.Sprintf("--lightpeers=%d --lightserv=50", config.peersLight)
}
dockerfile := new(bytes.Buffer)
template.Must(template.New("").Parse(nodeDockerfile)).Execute(dockerfile, map[string]interface{}{
"NetworkID": config.network,
"Port": config.portFull,
"Peers": config.peersTotal,
"LightFlag": lightFlag,
"Bootnodes": strings.Join(bootnodes, ","),
"Ethstats": config.ethstats,
"Etherbase": config.etherbase,
"Unlock": config.keyJSON != "",
})
files[filepath.Join(workdir, "Dockerfile")] = dockerfile.Bytes()
composefile := new(bytes.Buffer)
template.Must(template.New("").Parse(nodeComposefile)).Execute(composefile, map[string]interface{}{
"Type": kind,
"Datadir": config.datadir,
"Network": network,
"FullPort": config.portFull,
"TotalPeers": config.peersTotal,
"Light": config.peersLight > 0,
"LightPort": config.portFull + 1,
"LightPeers": config.peersLight,
"Ethstats": config.ethstats[:strings.Index(config.ethstats, ":")],
"Etherbase": config.etherbase,
})
files[filepath.Join(workdir, "docker-compose.yaml")] = composefile.Bytes()
//genesisfile, _ := json.MarshalIndent(config.genesis, "", " ")
files[filepath.Join(workdir, "genesis.json")] = []byte(config.genesis)
if config.keyJSON != "" {
files[filepath.Join(workdir, "signer.json")] = []byte(config.keyJSON)
files[filepath.Join(workdir, "signer.pass")] = []byte(config.keyPass)
}
// Upload the deployment files to the remote server (and clean up afterwards)
if out, err := client.Upload(files); err != nil {
return out, err
}
defer client.Run("rm -rf " + workdir)
// Build and deploy the bootnode service
return nil, client.Stream(fmt.Sprintf("cd %s && docker-compose -p %s up -d --build", workdir, network))
}
// nodeInfos is returned from a boot or seal node status check to allow reporting
// various configuration parameters.
type nodeInfos struct {
genesis []byte
network int64
datadir string
ethstats string
portFull int
portLight int
enodeFull string
enodeLight string
peersTotal int
peersLight int
etherbase string
keyJSON string
keyPass string
}
// String implements the stringer interface.
func (info *nodeInfos) String() string {
discv5 := ""
if info.peersLight > 0 {
discv5 = fmt.Sprintf(", portv5=%d", info.portLight)
}
return fmt.Sprintf("port=%d%s, datadir=%s, peers=%d, lights=%d, ethstats=%s", info.portFull, discv5, info.datadir, info.peersTotal, info.peersLight, info.ethstats)
}
// checkNode does a health-check against an boot or seal node server to verify
// whether it's running, and if yes, whether it's responsive.
func checkNode(client *sshClient, network string, boot bool) (*nodeInfos, error) {
kind := "bootnode"
if !boot {
kind = "sealnode"
}
// Inspect a possible bootnode container on the host
infos, err := inspectContainer(client, fmt.Sprintf("%s_%s_1", network, kind))
if err != nil {
return nil, err
}
if !infos.running {
return nil, ErrServiceOffline
}
// Resolve a few types from the environmental variables
totalPeers, _ := strconv.Atoi(infos.envvars["TOTAL_PEERS"])
lightPeers, _ := strconv.Atoi(infos.envvars["LIGHT_PEERS"])
// Container available, retrieve its node ID and its genesis json
var out []byte
if out, err = client.Run(fmt.Sprintf("docker exec %s_%s_1 /geth --exec admin.nodeInfo.id attach", network, kind)); err != nil {
return nil, ErrServiceUnreachable
}
id := bytes.Trim(bytes.TrimSpace(out), "\"")
if out, err = client.Run(fmt.Sprintf("docker exec %s_%s_1 cat /genesis.json", network, kind)); err != nil {
return nil, ErrServiceUnreachable
}
genesis := bytes.TrimSpace(out)
keyJSON, keyPass := "", ""
if out, err = client.Run(fmt.Sprintf("docker exec %s_%s_1 cat /signer.json", network, kind)); err == nil {
keyJSON = string(bytes.TrimSpace(out))
}
if out, err = client.Run(fmt.Sprintf("docker exec %s_%s_1 cat /signer.pass", network, kind)); err == nil {
keyPass = string(bytes.TrimSpace(out))
}
// Run a sanity check to see if the devp2p is reachable
port := infos.portmap[infos.envvars["FULL_PORT"]]
if err = checkPort(client.server, port); err != nil {
log.Warn(fmt.Sprintf("%s devp2p port seems unreachable", strings.Title(kind)), "server", client.server, "port", port, "err", err)
}
// Assemble and return the useful infos
stats := &nodeInfos{
genesis: genesis,
datadir: infos.volumes["/root/.ethereum"],
portFull: infos.portmap[infos.envvars["FULL_PORT"]],
portLight: infos.portmap[infos.envvars["LIGHT_PORT"]],
peersTotal: totalPeers,
peersLight: lightPeers,
ethstats: infos.envvars["STATS_NAME"],
etherbase: infos.envvars["MINER_NAME"],
keyJSON: keyJSON,
keyPass: keyPass,
}
stats.enodeFull = fmt.Sprintf("enode://%s@%s:%d", id, client.address, stats.portFull)
if stats.portLight != 0 {
stats.enodeLight = fmt.Sprintf("enode://%s@%s:%d?discport=%d", id, client.address, stats.portFull, stats.portLight)
}
return stats, nil
}
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