107 lines
3.5 KiB
Go
107 lines
3.5 KiB
Go
|
// 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"
|
||
|
|
"html/template"
|
||
|
|
"math/rand"
|
||
|
|
"path/filepath"
|
||
|
|
|
||
|
|
"github.com/ethereum/go-ethereum/log"
|
||
|
|
)
|
||
|
|
|
||
|
|
// nginxDockerfile is theis the Dockerfile required to build an nginx reverse-
|
||
|
|
// proxy.
|
||
|
|
var nginxDockerfile = `FROM jwilder/nginx-proxy`
|
||
|
|
|
||
|
|
// nginxComposefile is the docker-compose.yml file required to deploy and maintain
|
||
|
|
// an nginx reverse-proxy. The proxy is responsible for exposing one or more HTTP
|
||
|
|
// services running on a single host.
|
||
|
|
var nginxComposefile = `
|
||
|
|
version: '2'
|
||
|
|
services:
|
||
|
|
nginx:
|
||
|
|
build: .
|
||
|
|
image: {{.Network}}/nginx
|
||
|
|
ports:
|
||
|
|
- "{{.Port}}:80"
|
||
|
|
volumes:
|
||
|
|
- /var/run/docker.sock:/tmp/docker.sock:ro
|
||
|
|
restart: always
|
||
|
|
`
|
||
|
|
|
||
|
|
// deployNginx deploys a new nginx reverse-proxy container to expose one or more
|
||
|
|
// HTTP services running on a single host. If an instance with the specified
|
||
|
|
// network name already exists there, it will be overwritten!
|
||
|
|
func deployNginx(client *sshClient, network string, port int) ([]byte, error) {
|
||
|
|
log.Info("Deploying nginx reverse-proxy", "server", client.server, "port", port)
|
||
|
|
|
||
|
|
// Generate the content to upload to the server
|
||
|
|
workdir := fmt.Sprintf("%d", rand.Int63())
|
||
|
|
files := make(map[string][]byte)
|
||
|
|
|
||
|
|
dockerfile := new(bytes.Buffer)
|
||
|
|
template.Must(template.New("").Parse(nginxDockerfile)).Execute(dockerfile, nil)
|
||
|
|
files[filepath.Join(workdir, "Dockerfile")] = dockerfile.Bytes()
|
||
|
|
|
||
|
|
composefile := new(bytes.Buffer)
|
||
|
|
template.Must(template.New("").Parse(nginxComposefile)).Execute(composefile, map[string]interface{}{
|
||
|
|
"Network": network,
|
||
|
|
"Port": port,
|
||
|
|
})
|
||
|
|
files[filepath.Join(workdir, "docker-compose.yaml")] = composefile.Bytes()
|
||
|
|
|
||
|
|
// 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 ethstats service
|
||
|
|
return nil, client.Stream(fmt.Sprintf("cd %s && docker-compose -p %s up -d --build", workdir, network))
|
||
|
|
}
|
||
|
|
|
||
|
|
// nginxInfos is returned from an nginx reverse-proxy status check to allow
|
||
|
|
// reporting various configuration parameters.
|
||
|
|
type nginxInfos struct {
|
||
|
|
port int
|
||
|
|
}
|
||
|
|
|
||
|
|
// String implements the stringer interface.
|
||
|
|
func (info *nginxInfos) String() string {
|
||
|
|
return fmt.Sprintf("port=%d", info.port)
|
||
|
|
}
|
||
|
|
|
||
|
|
// checkNginx does a health-check against an nginx reverse-proxy to verify whether
|
||
|
|
// it's running, and if yes, gathering a collection of useful infos about it.
|
||
|
|
func checkNginx(client *sshClient, network string) (*nginxInfos, error) {
|
||
|
|
// Inspect a possible nginx container on the host
|
||
|
|
infos, err := inspectContainer(client, fmt.Sprintf("%s_nginx_1", network))
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
if !infos.running {
|
||
|
|
return nil, ErrServiceOffline
|
||
|
|
}
|
||
|
|
// Container available, assemble and return the useful infos
|
||
|
|
return &nginxInfos{
|
||
|
|
port: infos.portmap["80/tcp"],
|
||
|
|
}, nil
|
||
|
|
}
|