mirror of
https://github.com/Luzifer/repo-template.git
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302 lines
8.5 KiB
Go
302 lines
8.5 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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package main
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import (
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"bufio"
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"bytes"
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"encoding/json"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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"strings"
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"time"
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"golang.org/x/oauth2"
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"golang.org/x/oauth2/google"
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compute "google.golang.org/api/compute/v1"
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)
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var (
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proj = flag.String("project", "symbolic-datum-552", "name of Project")
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zone = flag.String("zone", "us-central1-a", "GCE zone")
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mach = flag.String("machinetype", "n1-standard-1", "Machine type")
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instName = flag.String("instance_name", "http2-demo", "Name of VM instance.")
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sshPub = flag.String("ssh_public_key", "", "ssh public key file to authorize. Can modify later in Google's web UI anyway.")
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staticIP = flag.String("static_ip", "130.211.116.44", "Static IP to use. If empty, automatic.")
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writeObject = flag.String("write_object", "", "If non-empty, a VM isn't created and the flag value is Google Cloud Storage bucket/object to write. The contents from stdin.")
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publicObject = flag.Bool("write_object_is_public", false, "Whether the object created by --write_object should be public.")
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)
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func readFile(v string) string {
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slurp, err := ioutil.ReadFile(v)
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if err != nil {
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log.Fatalf("Error reading %s: %v", v, err)
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}
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return strings.TrimSpace(string(slurp))
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}
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var config = &oauth2.Config{
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// The client-id and secret should be for an "Installed Application" when using
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// the CLI. Later we'll use a web application with a callback.
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ClientID: readFile("client-id.dat"),
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ClientSecret: readFile("client-secret.dat"),
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Endpoint: google.Endpoint,
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Scopes: []string{
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compute.DevstorageFullControlScope,
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compute.ComputeScope,
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"https://www.googleapis.com/auth/sqlservice",
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"https://www.googleapis.com/auth/sqlservice.admin",
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},
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RedirectURL: "urn:ietf:wg:oauth:2.0:oob",
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}
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const baseConfig = `#cloud-config
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coreos:
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units:
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- name: h2demo.service
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command: start
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content: |
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[Unit]
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Description=HTTP2 Demo
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[Service]
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ExecStartPre=/bin/bash -c 'mkdir -p /opt/bin && curl -s -o /opt/bin/h2demo http://storage.googleapis.com/http2-demo-server-tls/h2demo && chmod +x /opt/bin/h2demo'
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ExecStart=/opt/bin/h2demo --prod
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RestartSec=5s
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Restart=always
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Type=simple
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[Install]
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WantedBy=multi-user.target
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`
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func main() {
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flag.Parse()
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if *proj == "" {
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log.Fatalf("Missing --project flag")
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}
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prefix := "https://www.googleapis.com/compute/v1/projects/" + *proj
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machType := prefix + "/zones/" + *zone + "/machineTypes/" + *mach
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const tokenFileName = "token.dat"
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tokenFile := tokenCacheFile(tokenFileName)
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tokenSource := oauth2.ReuseTokenSource(nil, tokenFile)
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token, err := tokenSource.Token()
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if err != nil {
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if *writeObject != "" {
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log.Fatalf("Can't use --write_object without a valid token.dat file already cached.")
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}
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log.Printf("Error getting token from %s: %v", tokenFileName, err)
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log.Printf("Get auth code from %v", config.AuthCodeURL("my-state"))
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fmt.Print("\nEnter auth code: ")
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sc := bufio.NewScanner(os.Stdin)
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sc.Scan()
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authCode := strings.TrimSpace(sc.Text())
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token, err = config.Exchange(oauth2.NoContext, authCode)
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if err != nil {
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log.Fatalf("Error exchanging auth code for a token: %v", err)
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}
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if err := tokenFile.WriteToken(token); err != nil {
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log.Fatalf("Error writing to %s: %v", tokenFileName, err)
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}
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tokenSource = oauth2.ReuseTokenSource(token, nil)
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}
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oauthClient := oauth2.NewClient(oauth2.NoContext, tokenSource)
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if *writeObject != "" {
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writeCloudStorageObject(oauthClient)
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return
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}
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computeService, _ := compute.New(oauthClient)
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natIP := *staticIP
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if natIP == "" {
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// Try to find it by name.
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aggAddrList, err := computeService.Addresses.AggregatedList(*proj).Do()
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if err != nil {
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log.Fatal(err)
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}
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// http://godoc.org/code.google.com/p/google-api-go-client/compute/v1#AddressAggregatedList
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IPLoop:
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for _, asl := range aggAddrList.Items {
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for _, addr := range asl.Addresses {
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if addr.Name == *instName+"-ip" && addr.Status == "RESERVED" {
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natIP = addr.Address
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break IPLoop
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}
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}
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}
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}
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cloudConfig := baseConfig
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if *sshPub != "" {
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key := strings.TrimSpace(readFile(*sshPub))
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cloudConfig += fmt.Sprintf("\nssh_authorized_keys:\n - %s\n", key)
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}
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if os.Getenv("USER") == "bradfitz" {
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cloudConfig += fmt.Sprintf("\nssh_authorized_keys:\n - %s\n", "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAwks9dwWKlRC+73gRbvYtVg0vdCwDSuIlyt4z6xa/YU/jTDynM4R4W10hm2tPjy8iR1k8XhDv4/qdxe6m07NjG/By1tkmGpm1mGwho4Pr5kbAAy/Qg+NLCSdAYnnE00FQEcFOC15GFVMOW2AzDGKisReohwH9eIzHPzdYQNPRWXE= bradfitz@papag.bradfitz.com")
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}
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const maxCloudConfig = 32 << 10 // per compute API docs
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if len(cloudConfig) > maxCloudConfig {
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log.Fatalf("cloud config length of %d bytes is over %d byte limit", len(cloudConfig), maxCloudConfig)
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}
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instance := &compute.Instance{
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Name: *instName,
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Description: "Go Builder",
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MachineType: machType,
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Disks: []*compute.AttachedDisk{instanceDisk(computeService)},
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Tags: &compute.Tags{
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Items: []string{"http-server", "https-server"},
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},
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Metadata: &compute.Metadata{
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Items: []*compute.MetadataItems{
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{
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Key: "user-data",
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Value: &cloudConfig,
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},
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},
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},
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NetworkInterfaces: []*compute.NetworkInterface{
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{
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AccessConfigs: []*compute.AccessConfig{
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{
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Type: "ONE_TO_ONE_NAT",
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Name: "External NAT",
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NatIP: natIP,
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},
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},
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Network: prefix + "/global/networks/default",
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},
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},
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ServiceAccounts: []*compute.ServiceAccount{
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{
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Email: "default",
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Scopes: []string{
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compute.DevstorageFullControlScope,
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compute.ComputeScope,
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},
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},
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},
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}
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log.Printf("Creating instance...")
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op, err := computeService.Instances.Insert(*proj, *zone, instance).Do()
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if err != nil {
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log.Fatalf("Failed to create instance: %v", err)
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}
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opName := op.Name
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log.Printf("Created. Waiting on operation %v", opName)
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OpLoop:
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for {
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time.Sleep(2 * time.Second)
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op, err := computeService.ZoneOperations.Get(*proj, *zone, opName).Do()
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if err != nil {
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log.Fatalf("Failed to get op %s: %v", opName, err)
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}
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switch op.Status {
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case "PENDING", "RUNNING":
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log.Printf("Waiting on operation %v", opName)
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continue
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case "DONE":
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if op.Error != nil {
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for _, operr := range op.Error.Errors {
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log.Printf("Error: %+v", operr)
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}
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log.Fatalf("Failed to start.")
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}
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log.Printf("Success. %+v", op)
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break OpLoop
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default:
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log.Fatalf("Unknown status %q: %+v", op.Status, op)
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}
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}
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inst, err := computeService.Instances.Get(*proj, *zone, *instName).Do()
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if err != nil {
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log.Fatalf("Error getting instance after creation: %v", err)
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}
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ij, _ := json.MarshalIndent(inst, "", " ")
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log.Printf("Instance: %s", ij)
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}
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func instanceDisk(svc *compute.Service) *compute.AttachedDisk {
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const imageURL = "https://www.googleapis.com/compute/v1/projects/coreos-cloud/global/images/coreos-stable-444-5-0-v20141016"
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diskName := *instName + "-disk"
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return &compute.AttachedDisk{
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AutoDelete: true,
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Boot: true,
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Type: "PERSISTENT",
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InitializeParams: &compute.AttachedDiskInitializeParams{
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DiskName: diskName,
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SourceImage: imageURL,
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DiskSizeGb: 50,
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},
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}
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}
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func writeCloudStorageObject(httpClient *http.Client) {
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content := os.Stdin
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const maxSlurp = 1 << 20
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var buf bytes.Buffer
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n, err := io.CopyN(&buf, content, maxSlurp)
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if err != nil && err != io.EOF {
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log.Fatalf("Error reading from stdin: %v, %v", n, err)
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}
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contentType := http.DetectContentType(buf.Bytes())
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req, err := http.NewRequest("PUT", "https://storage.googleapis.com/"+*writeObject, io.MultiReader(&buf, content))
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if err != nil {
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log.Fatal(err)
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}
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req.Header.Set("x-goog-api-version", "2")
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if *publicObject {
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req.Header.Set("x-goog-acl", "public-read")
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}
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req.Header.Set("Content-Type", contentType)
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res, err := httpClient.Do(req)
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if err != nil {
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log.Fatal(err)
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}
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if res.StatusCode != 200 {
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res.Write(os.Stderr)
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log.Fatalf("Failed.")
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}
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log.Printf("Success.")
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os.Exit(0)
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}
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type tokenCacheFile string
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func (f tokenCacheFile) Token() (*oauth2.Token, error) {
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slurp, err := ioutil.ReadFile(string(f))
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if err != nil {
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return nil, err
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}
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t := new(oauth2.Token)
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if err := json.Unmarshal(slurp, t); err != nil {
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return nil, err
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}
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return t, nil
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}
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func (f tokenCacheFile) WriteToken(t *oauth2.Token) error {
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jt, err := json.Marshal(t)
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if err != nil {
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return err
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}
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return ioutil.WriteFile(string(f), jt, 0600)
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}
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