mirror of
https://github.com/offen/docker-volume-backup.git
synced 2024-11-14 02:25:49 +01:00
287 lines
8.6 KiB
Go
287 lines
8.6 KiB
Go
// Copyright 2022 - offen.software <hioffen@posteo.de>
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// SPDX-License-Identifier: MPL-2.0
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package main
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import (
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"bytes"
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"fmt"
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"log/slog"
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"os"
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"path"
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"text/template"
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"time"
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"github.com/offen/docker-volume-backup/internal/errwrap"
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"github.com/offen/docker-volume-backup/internal/storage"
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"github.com/offen/docker-volume-backup/internal/storage/azure"
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"github.com/offen/docker-volume-backup/internal/storage/dropbox"
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"github.com/offen/docker-volume-backup/internal/storage/local"
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"github.com/offen/docker-volume-backup/internal/storage/s3"
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"github.com/offen/docker-volume-backup/internal/storage/ssh"
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"github.com/offen/docker-volume-backup/internal/storage/webdav"
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"github.com/containrrr/shoutrrr"
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"github.com/containrrr/shoutrrr/pkg/router"
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"github.com/docker/docker/client"
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"github.com/leekchan/timeutil"
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)
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// script holds all the stateful information required to orchestrate a
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// single backup run.
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type script struct {
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cli *client.Client
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storages []storage.Backend
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logger *slog.Logger
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sender *router.ServiceRouter
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template *template.Template
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hooks []hook
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hookLevel hookLevel
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file string
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stats *Stats
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encounteredLock bool
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c *Config
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}
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// newScript creates all resources needed for the script to perform actions against
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// remote resources like the Docker engine or remote storage locations. All
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// reading from env vars or other configuration sources is expected to happen
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// in this method.
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func newScript(c *Config) *script {
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stdOut, logBuffer := buffer(os.Stdout)
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return &script{
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c: c,
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logger: slog.New(slog.NewTextHandler(stdOut, nil)),
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stats: &Stats{
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StartTime: time.Now(),
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LogOutput: logBuffer,
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Storages: map[string]StorageStats{
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"S3": {},
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"WebDAV": {},
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"SSH": {},
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"Local": {},
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"Azure": {},
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"Dropbox": {},
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},
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},
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}
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}
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func (s *script) init() error {
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s.registerHook(hookLevelPlumbing, func(error) error {
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s.stats.EndTime = time.Now()
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s.stats.TookTime = s.stats.EndTime.Sub(s.stats.StartTime)
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return nil
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})
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s.file = path.Join("/tmp", s.c.BackupFilename)
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tmplFileName, tErr := template.New("extension").Parse(s.file)
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if tErr != nil {
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return errwrap.Wrap(tErr, "unable to parse backup file extension template")
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}
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var bf bytes.Buffer
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if tErr := tmplFileName.Execute(&bf, map[string]string{
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"Extension": fmt.Sprintf("tar.%s", s.c.BackupCompression),
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}); tErr != nil {
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return errwrap.Wrap(tErr, "error executing backup file extension template")
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}
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s.file = bf.String()
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if s.c.BackupFilenameExpand {
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s.file = os.ExpandEnv(s.file)
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s.c.BackupLatestSymlink = os.ExpandEnv(s.c.BackupLatestSymlink)
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s.c.BackupPruningPrefix = os.ExpandEnv(s.c.BackupPruningPrefix)
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}
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s.file = timeutil.Strftime(&s.stats.StartTime, s.file)
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_, err := os.Stat("/var/run/docker.sock")
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_, dockerHostSet := os.LookupEnv("DOCKER_HOST")
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if !os.IsNotExist(err) || dockerHostSet {
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cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
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if err != nil {
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return errwrap.Wrap(err, "failed to create docker client")
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}
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s.cli = cli
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s.registerHook(hookLevelPlumbing, func(err error) error {
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if err := s.cli.Close(); err != nil {
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return errwrap.Wrap(err, "failed to close docker client")
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}
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return nil
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})
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}
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logFunc := func(logType storage.LogLevel, context string, msg string, params ...any) {
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switch logType {
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case storage.LogLevelWarning:
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s.logger.Warn(fmt.Sprintf(msg, params...), "storage", context)
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default:
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s.logger.Info(fmt.Sprintf(msg, params...), "storage", context)
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}
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}
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if s.c.AwsS3BucketName != "" {
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s3Config := s3.Config{
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Endpoint: s.c.AwsEndpoint,
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AccessKeyID: s.c.AwsAccessKeyID,
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SecretAccessKey: s.c.AwsSecretAccessKey,
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IamRoleEndpoint: s.c.AwsIamRoleEndpoint,
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EndpointProto: s.c.AwsEndpointProto,
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EndpointInsecure: s.c.AwsEndpointInsecure,
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RemotePath: s.c.AwsS3Path,
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BucketName: s.c.AwsS3BucketName,
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StorageClass: s.c.AwsStorageClass,
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CACert: s.c.AwsEndpointCACert.Cert,
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PartSize: s.c.AwsPartSize,
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}
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s3Backend, err := s3.NewStorageBackend(s3Config, logFunc)
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if err != nil {
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return errwrap.Wrap(err, "error creating s3 storage backend")
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}
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s.storages = append(s.storages, s3Backend)
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}
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if s.c.WebdavUrl != "" {
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webDavConfig := webdav.Config{
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URL: s.c.WebdavUrl,
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URLInsecure: s.c.WebdavUrlInsecure,
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Username: s.c.WebdavUsername,
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Password: s.c.WebdavPassword,
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RemotePath: s.c.WebdavPath,
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}
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webdavBackend, err := webdav.NewStorageBackend(webDavConfig, logFunc)
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if err != nil {
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return errwrap.Wrap(err, "error creating webdav storage backend")
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}
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s.storages = append(s.storages, webdavBackend)
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}
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if s.c.SSHHostName != "" {
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sshConfig := ssh.Config{
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HostName: s.c.SSHHostName,
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Port: s.c.SSHPort,
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User: s.c.SSHUser,
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Password: s.c.SSHPassword,
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IdentityFile: s.c.SSHIdentityFile,
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IdentityPassphrase: s.c.SSHIdentityPassphrase,
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RemotePath: s.c.SSHRemotePath,
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}
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sshBackend, err := ssh.NewStorageBackend(sshConfig, logFunc)
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if err != nil {
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return errwrap.Wrap(err, "error creating ssh storage backend")
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}
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s.storages = append(s.storages, sshBackend)
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}
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if _, err := os.Stat(s.c.BackupArchive); !os.IsNotExist(err) {
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localConfig := local.Config{
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ArchivePath: s.c.BackupArchive,
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LatestSymlink: s.c.BackupLatestSymlink,
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}
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localBackend := local.NewStorageBackend(localConfig, logFunc)
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s.storages = append(s.storages, localBackend)
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}
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if s.c.AzureStorageAccountName != "" {
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azureConfig := azure.Config{
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ContainerName: s.c.AzureStorageContainerName,
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AccountName: s.c.AzureStorageAccountName,
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PrimaryAccountKey: s.c.AzureStoragePrimaryAccountKey,
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Endpoint: s.c.AzureStorageEndpoint,
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RemotePath: s.c.AzureStoragePath,
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ConnectionString: s.c.AzureStorageConnectionString,
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}
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azureBackend, err := azure.NewStorageBackend(azureConfig, logFunc)
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if err != nil {
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return errwrap.Wrap(err, "error creating azure storage backend")
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}
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s.storages = append(s.storages, azureBackend)
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}
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if s.c.DropboxRefreshToken != "" && s.c.DropboxAppKey != "" && s.c.DropboxAppSecret != "" {
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dropboxConfig := dropbox.Config{
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Endpoint: s.c.DropboxEndpoint,
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OAuth2Endpoint: s.c.DropboxOAuth2Endpoint,
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RefreshToken: s.c.DropboxRefreshToken,
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AppKey: s.c.DropboxAppKey,
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AppSecret: s.c.DropboxAppSecret,
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RemotePath: s.c.DropboxRemotePath,
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ConcurrencyLevel: s.c.DropboxConcurrencyLevel.Int(),
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}
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dropboxBackend, err := dropbox.NewStorageBackend(dropboxConfig, logFunc)
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if err != nil {
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return errwrap.Wrap(err, "error creating dropbox storage backend")
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}
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s.storages = append(s.storages, dropboxBackend)
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}
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if s.c.EmailNotificationRecipient != "" {
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emailURL := fmt.Sprintf(
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"smtp://%s:%s@%s:%d/?from=%s&to=%s",
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s.c.EmailSMTPUsername,
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s.c.EmailSMTPPassword,
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s.c.EmailSMTPHost,
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s.c.EmailSMTPPort,
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s.c.EmailNotificationSender,
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s.c.EmailNotificationRecipient,
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)
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s.c.NotificationURLs = append(s.c.NotificationURLs, emailURL)
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s.logger.Warn(
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"Using EMAIL_* keys for providing notification configuration has been deprecated and will be removed in the next major version.",
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)
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s.logger.Warn(
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"Please use NOTIFICATION_URLS instead. Refer to the README for an upgrade guide.",
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)
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}
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hookLevel, ok := hookLevels[s.c.NotificationLevel]
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if !ok {
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return errwrap.Wrap(nil, fmt.Sprintf("unknown NOTIFICATION_LEVEL %s", s.c.NotificationLevel))
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}
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s.hookLevel = hookLevel
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if len(s.c.NotificationURLs) > 0 {
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sender, senderErr := shoutrrr.CreateSender(s.c.NotificationURLs...)
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if senderErr != nil {
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return errwrap.Wrap(senderErr, "error creating sender")
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}
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s.sender = sender
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tmpl := template.New("")
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tmpl.Funcs(templateHelpers)
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tmpl, err = tmpl.Parse(defaultNotifications)
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if err != nil {
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return errwrap.Wrap(err, "unable to parse default notifications templates")
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}
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if fi, err := os.Stat("/etc/dockervolumebackup/notifications.d"); err == nil && fi.IsDir() {
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tmpl, err = tmpl.ParseGlob("/etc/dockervolumebackup/notifications.d/*.*")
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if err != nil {
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return errwrap.Wrap(err, "unable to parse user defined notifications templates")
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}
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}
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s.template = tmpl
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// To prevent duplicate notifications, ensure the regsistered callbacks
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// run mutually exclusive.
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s.registerHook(hookLevelError, func(err error) error {
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if err == nil {
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return nil
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}
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return s.notifyFailure(err)
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})
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s.registerHook(hookLevelInfo, func(err error) error {
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if err != nil {
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return nil
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}
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return s.notifySuccess()
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})
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}
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return nil
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}
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