mirror of
https://github.com/apricote/hcloud-upload-image.git
synced 2026-02-07 10:17:03 +00:00
feat: log output
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parent
4f57df5b66
commit
904e5e0bed
8 changed files with 133 additions and 23 deletions
86
snapshot.go
86
snapshot.go
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@ -3,12 +3,12 @@ package hcloud_upload_image
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import (
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"context"
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"fmt"
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"log"
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"time"
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"github.com/hetznercloud/hcloud-go/v2/hcloud"
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"golang.org/x/crypto/ssh"
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"github.com/apricote/hcloud-upload-image/util/contextlogger"
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"github.com/apricote/hcloud-upload-image/util/control"
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"github.com/apricote/hcloud-upload-image/util/randomid"
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"github.com/apricote/hcloud-upload-image/util/sshkey"
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@ -50,15 +50,21 @@ type snapshotClient struct {
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}
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func (s snapshotClient) Upload(ctx context.Context, options UploadOptions) (*hcloud.Image, error) {
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logger := contextlogger.From(ctx).With(
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"library", "hcloud-upload-image",
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"method", "upload",
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)
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id, err := randomid.Generate()
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if err != nil {
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return nil, err
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}
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logger = logger.With("run-id", id)
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// For simplicity, we use the name random name for SSH Key + Server
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resourceName := resourcePrefix + id
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// 1. Create SSH Key
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log.Print("Step 1: Generating SSH Key")
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logger.InfoContext(ctx, "# Step 1: Generating SSH Key")
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publicKey, privateKey, err := sshkey.GenerateKeyPair()
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if err != nil {
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return nil, fmt.Errorf("failed to generate temporary ssh key pair: %w", err)
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@ -72,25 +78,35 @@ func (s snapshotClient) Upload(ctx context.Context, options UploadOptions) (*hcl
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if err != nil {
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return nil, fmt.Errorf("failed to submit temporary ssh key to API: %w", err)
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}
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logger.DebugContext(ctx, "Uploaded ssh key", "ssh-key-id", key.ID)
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defer func() {
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// Cleanup SSH Key
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if options.DebugSkipResourceCleanup {
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logger.InfoContext(ctx, "Cleanup: Skipping cleanup of temporary ssh key")
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return
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}
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logger.InfoContext(ctx, "Cleanup: Deleting temporary ssh key")
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_, err := s.client.SSHKey.Delete(ctx, key)
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if err != nil {
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logger.WarnContext(ctx, "Cleanup: ssh key could not be deleted", "error", err)
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// TODO
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}
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}()
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// 2. Create Server
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log.Print("Step 2: Creating Server")
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logger.InfoContext(ctx, "# Step 2: Creating Server")
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serverType, ok := serverTypePerArchitecture[options.Architecture]
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if !ok {
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return nil, fmt.Errorf("unknown architecture %q, valid options: %q, %q", options.Architecture, hcloud.ArchitectureX86, hcloud.ArchitectureARM)
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}
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logger.DebugContext(ctx, "creating server with config",
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"image", defaultImage.Name,
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"location", defaultLocation.Name,
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"serverType", serverType.Name,
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)
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serverCreateResult, _, err := s.client.Server.Create(ctx, hcloud.ServerCreateOpts{
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Name: resourceName,
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ServerType: serverType,
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@ -108,27 +124,34 @@ func (s snapshotClient) Upload(ctx context.Context, options UploadOptions) (*hcl
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if err != nil {
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return nil, fmt.Errorf("creating the temporary server failed: %w", err)
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}
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logger = logger.With("server", serverCreateResult.Server.ID)
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logger.DebugContext(ctx, "Created Server")
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_, err = s.client.Action.WaitForActions(ctx, append(serverCreateResult.NextActions, serverCreateResult.Action)...)
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logger.DebugContext(ctx, "waiting on actions")
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err = s.client.Action.WaitFor(ctx, append(serverCreateResult.NextActions, serverCreateResult.Action)...)
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if err != nil {
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return nil, fmt.Errorf("creating the temporary server failed: %w", err)
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}
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logger.DebugContext(ctx, "actions finished")
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server := serverCreateResult.Server
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defer func() {
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// Cleanup Server
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if options.DebugSkipResourceCleanup {
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logger.InfoContext(ctx, "Cleanup: Skipping cleanup of temporary server")
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return
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}
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logger.InfoContext(ctx, "Cleanup: Deleting temporary server")
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_, _, err := s.client.Server.DeleteWithResult(ctx, server)
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if err != nil {
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// TODO
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logger.WarnContext(ctx, "Cleanup: server could not be deleted", "error", err)
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}
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}()
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// 3. Activate Rescue System
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log.Print("Step 3: Activating Rescue System")
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logger.InfoContext(ctx, "# Step 4: Activating Rescue System")
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enableRescueResult, _, err := s.client.Server.EnableRescue(ctx, server, hcloud.ServerEnableRescueOpts{
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Type: defaultRescueType,
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SSHKeys: []*hcloud.SSHKey{key},
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@ -137,25 +160,31 @@ func (s snapshotClient) Upload(ctx context.Context, options UploadOptions) (*hcl
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return nil, fmt.Errorf("enabling the rescue system on the temporary server failed: %w", err)
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}
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_, err = s.client.Action.WaitForAction(ctx, enableRescueResult.Action)
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logger.DebugContext(ctx, "rescue system requested, waiting on action")
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err = s.client.Action.WaitFor(ctx, enableRescueResult.Action)
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if err != nil {
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return nil, fmt.Errorf("enabling the rescue system on the temporary server failed: %w", err)
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}
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logger.DebugContext(ctx, "action finished, rescue system enabled")
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// 4. Boot Server
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log.Print("Step 4: Booting Server")
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logger.InfoContext(ctx, "# Step 4: Booting Server")
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powerOnAction, _, err := s.client.Server.Poweron(ctx, server)
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if err != nil {
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return nil, fmt.Errorf("starting the temporary server failed: %w", err)
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}
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_, err = s.client.Action.WaitForAction(ctx, powerOnAction)
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logger.DebugContext(ctx, "boot requested, waiting on action")
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err = s.client.Action.WaitFor(ctx, powerOnAction)
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if err != nil {
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return nil, fmt.Errorf("starting the temporary server failed: %w", err)
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}
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logger.DebugContext(ctx, "action finished, server is booting")
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// 5. Open SSH Session
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log.Print("Step 5: Opening SSH Connection")
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logger.InfoContext(ctx, "# Step 5: Opening SSH Connection")
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signer, err := ssh.ParsePrivateKey(privateKey)
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if err != nil {
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return nil, fmt.Errorf("parsing the automatically generated temporary private key failed: %w", err)
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@ -174,18 +203,23 @@ func (s snapshotClient) Upload(ctx context.Context, options UploadOptions) (*hcl
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// the server needs some time until its properly started and ssh is available
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var sshClient *ssh.Client
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err = control.Retry(ctx, 10, func() error {
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var err error
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sshClient, err = ssh.Dial("tcp", server.PublicNet.IPv4.IP.String()+":ssh", sshClientConfig)
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return err
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})
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err = control.Retry(
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contextlogger.New(ctx, logger.With("operation", "ssh")),
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10,
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func() error {
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var err error
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logger.DebugContext(ctx, "trying to connect to server", "ip", server.PublicNet.IPv4.IP)
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sshClient, err = ssh.Dial("tcp", server.PublicNet.IPv4.IP.String()+":ssh", sshClientConfig)
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return err
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},
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)
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if err != nil {
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return nil, fmt.Errorf("failed to ssh into temporary server: %w", err)
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}
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defer sshClient.Close()
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// 6. SSH On Server: Download Image, Decompress, Write to Root Disk
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log.Print("Step 6: Downloading image and writing to disk")
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logger.InfoContext(ctx, "# Step 6: Downloading image and writing to disk")
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decompressionCommand := ""
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if options.ImageCompression != CompressionNone {
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switch options.ImageCompression {
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@ -196,22 +230,26 @@ func (s snapshotClient) Upload(ctx context.Context, options UploadOptions) (*hcl
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}
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}
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output, err := sshsession.Run(sshClient, fmt.Sprintf("wget --no-verbose -O - %q %s | dd of=/dev/sda && sync", options.ImageURL.String(), decompressionCommand))
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log.Print(string(output))
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fullCmd := fmt.Sprintf("wget --no-verbose -O - %q %s | dd of=/dev/sda bs=4M && sync", options.ImageURL.String(), decompressionCommand)
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logger.DebugContext(ctx, "running download, decompress and write to disk command", "cmd", fullCmd)
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output, err := sshsession.Run(sshClient, fullCmd)
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logger.InfoContext(ctx, "# Step 6: Finished writing image to disk")
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logger.DebugContext(ctx, string(output))
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if err != nil {
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return nil, fmt.Errorf("failed to download and write the image: %w", err)
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}
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// 7. SSH On Server: Shutdown
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log.Print("Step 7: Shutting down server")
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logger.InfoContext(ctx, "# Step 7: Shutting down server")
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_, err = sshsession.Run(sshClient, "shutdown now")
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if err != nil {
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// TODO Verify if shutdown error, otherwise return
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fmt.Printf("shutdown error: %+v", err)
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logger.WarnContext(ctx, "shutdown returned error", "err", err)
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}
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// 8. Create Image from Server
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log.Print("Step 7: Creating Image")
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logger.InfoContext(ctx, "# Step 8: Creating Image")
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createImageResult, _, err := s.client.Server.CreateImage(ctx, server, &hcloud.ServerCreateImageOpts{
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Type: hcloud.ImageTypeSnapshot,
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Description: options.Description,
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@ -220,12 +258,16 @@ func (s snapshotClient) Upload(ctx context.Context, options UploadOptions) (*hcl
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if err != nil {
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return nil, fmt.Errorf("failed to create snapshot: %w", err)
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}
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_, err = s.client.Action.WaitForAction(ctx, createImageResult.Action)
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logger.DebugContext(ctx, "image creation requested, waiting on action")
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err = s.client.Action.WaitFor(ctx, createImageResult.Action)
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if err != nil {
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return nil, fmt.Errorf("failed to create snapshot: %w", err)
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}
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logger.DebugContext(ctx, "action finished, image was created")
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image := createImageResult.Image
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logger.InfoContext(ctx, "# Image was created", "image", image.ID)
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// Resource cleanup is happening in `defer`
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return image, nil
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