package internal import ( "fmt" "io/ioutil" "os" "path/filepath" "strings" "time" "github.com/cupcakearmy/autorestic/internal/colors" "github.com/cupcakearmy/autorestic/internal/lock" "github.com/cupcakearmy/autorestic/internal/metadata" "github.com/robfig/cron" ) type LocationType string const ( TypeLocal LocationType = "local" TypeVolume LocationType = "volume" ) type HookArray = []string type Hooks struct { Dir string `yaml:"dir"` Before HookArray `yaml:"before,omitempty"` After HookArray `yaml:"after,omitempty"` Success HookArray `yaml:"success,omitempty"` Failure HookArray `yaml:"failure,omitempty"` } type Location struct { name string `yaml:",omitempty"` From []string `yaml:"from,omitempty"` Type string `yaml:"type,omitempty"` To []string `yaml:"to,omitempty"` Hooks Hooks `yaml:"hooks,omitempty"` Cron string `yaml:"cron,omitempty"` Options Options `yaml:"options,omitempty"` } func GetLocation(name string) (Location, bool) { l, ok := GetConfig().Locations[name] l.name = name return l, ok } func (l Location) validate() error { if len(l.From) == 0 { return fmt.Errorf(`Location "%s" is missing "from" key`, l.name) } t, err := l.getType() if err != nil { return err } switch t { case TypeLocal: for _, path := range l.From { if from, err := GetPathRelativeToConfig(path); err != nil { return err } else { if stat, err := os.Stat(from); err != nil { return err } else { if !stat.IsDir() { return fmt.Errorf("\"%s\" is not valid directory for location \"%s\"", from, l.name) } } } } case TypeVolume: if len(l.From) > 1 { return fmt.Errorf(`location "%s" has more than one docker volume`, l.name) } } if len(l.To) == 0 { return fmt.Errorf(`Location "%s" has no "to" targets`, l.name) } // Check if backends are all valid for _, to := range l.To { _, ok := GetBackend(to) if !ok { return fmt.Errorf("invalid backend `%s`", to) } } return nil } func (l Location) ExecuteHooks(commands []string, options ExecuteOptions) error { if len(commands) == 0 { return nil } if l.Hooks.Dir != "" { if dir, err := GetPathRelativeToConfig(l.Hooks.Dir); err != nil { return err } else { options.Dir = dir } } colors.Secondary.Println("\nRunning hooks") for _, command := range commands { colors.Body.Println("> " + command) out, err := ExecuteCommand(options, "-c", command) if err != nil { colors.Error.Println(out) return err } if VERBOSE { colors.Faint.Println(out) } } colors.Body.Println("") return nil } func (l Location) getType() (LocationType, error) { t := strings.ToLower(l.Type) if t == "" || t == "local" { return TypeLocal, nil } else if t == "volume" { return TypeVolume, nil } return "", fmt.Errorf("invalid location type \"%s\"", l.Type) } func (l Location) getTag(parts ...string) string { parts = append([]string{"ar"}, parts...) return strings.Join(parts, ":") } func (l Location) getLocationTag() string { return l.getTag("location", l.name) } func (l Location) Backup(cron bool, specificBackend string) []error { var errors []error var backends []string colors.PrimaryPrint(" Backing up location \"%s\" ", l.name) t, err := l.getType() if err != nil { errors = append(errors, err) return errors } cwd, _ := GetPathRelativeToConfig(".") options := ExecuteOptions{ Command: "bash", Dir: cwd, Envs: map[string]string{ "AUTORESTIC_LOCATION": l.name, }, } if err := l.validate(); err != nil { errors = append(errors, err) goto after } // Hooks if err := l.ExecuteHooks(l.Hooks.Before, options); err != nil { errors = append(errors, err) goto after } // Backup if specificBackend == "" { backends = l.To } else { if l.hasBackend(specificBackend) { backends = []string{specificBackend} } else { errors = append(errors, fmt.Errorf("backup location \"%s\" has no backend \"%s\"", l.name, specificBackend)) return errors } } for i, to := range backends { backend, _ := GetBackend(to) colors.Secondary.Printf("Backend: %s\n", backend.name) env, err := backend.getEnv() if err != nil { errors = append(errors, err) continue } lFlags := getOptions(l.Options, "backup") bFlags := getOptions(backend.Options, "backup") cmd := []string{"backup"} cmd = append(cmd, lFlags...) cmd = append(cmd, bFlags...) if cron { cmd = append(cmd, "--tag", l.getTag("cron")) } cmd = append(cmd, "--tag", l.getLocationTag()) backupOptions := ExecuteOptions{ Envs: env, } var out string switch t { case TypeLocal: for _, from := range l.From { path, err := GetPathRelativeToConfig(from) if err != nil { errors = append(errors, err) goto after } cmd = append(cmd, path) } out, err = ExecuteResticCommand(backupOptions, cmd...) case TypeVolume: ok := CheckIfVolumeExists(l.From[0]) if !ok { errors = append(errors, fmt.Errorf("volume \"%s\" does not exist", l.From[0])) continue } cmd = append(cmd, "/data") out, err = backend.ExecDocker(l, cmd) } if err != nil { errors = append(errors, err) continue } md := metadata.ExtractMetadataFromBackupLog(out) mdEnv := metadata.MakeEnvFromMetadata(&md) for k, v := range mdEnv { options.Envs[k+"_"+fmt.Sprint(i)] = v options.Envs[k+"_"+strings.ToUpper(backend.name)] = v } if VERBOSE { colors.Faint.Println(out) } } // After hooks if err := l.ExecuteHooks(l.Hooks.After, options); err != nil { errors = append(errors, err) } after: var commands []string if len(errors) > 0 { commands = l.Hooks.Failure } else { commands = l.Hooks.Success } if err := l.ExecuteHooks(commands, options); err != nil { errors = append(errors, err) } if len(errors) == 0 { colors.Success.Println("Done") } return errors } func (l Location) Forget(prune bool, dry bool) error { colors.PrimaryPrint("Forgetting for location \"%s\"", l.name) for _, to := range l.To { backend, _ := GetBackend(to) colors.Secondary.Printf("For backend \"%s\"\n", backend.name) env, err := backend.getEnv() if err != nil { return nil } options := ExecuteOptions{ Envs: env, } lFlags := getOptions(l.Options, "forget") bFlags := getOptions(backend.Options, "forget") cmd := []string{"forget", "--tag", l.getLocationTag()} if prune { cmd = append(cmd, "--prune") } if dry { cmd = append(cmd, "--dry-run") } cmd = append(cmd, lFlags...) cmd = append(cmd, bFlags...) out, err := ExecuteResticCommand(options, cmd...) if VERBOSE { colors.Faint.Println(out) } if err != nil { return err } } colors.Success.Println("Done") return nil } func (l Location) hasBackend(backend string) bool { for _, b := range l.To { if b == backend { return true } } return false } func (l Location) Restore(to, from string, force bool, snapshot string) error { if from == "" { from = l.To[0] } else if !l.hasBackend(from) { return fmt.Errorf("invalid backend: \"%s\"", from) } to, err := filepath.Abs(to) if err != nil { return err } if snapshot == "" { snapshot = "latest" } colors.PrimaryPrint("Restoring location \"%s\"", l.name) backend, _ := GetBackend(from) colors.Secondary.Printf("Restoring %s@%s → %s\n", snapshot, backend.name, to) t, err := l.getType() if err != nil { return err } switch t { case TypeLocal: // Check if target is empty if !force { notEmptyError := fmt.Errorf("target %s is not empty", to) _, err = os.Stat(to) if err == nil { files, err := ioutil.ReadDir(to) if err != nil { return err } if len(files) > 0 { return notEmptyError } } else { if !os.IsNotExist(err) { return err } } } err = backend.Exec([]string{"restore", "--target", to, "--tag", l.getLocationTag(), snapshot}) case TypeVolume: _, err = backend.ExecDocker(l, []string{"restore", "--target", "/", "--tag", l.getLocationTag(), snapshot}) } if err != nil { return err } colors.Success.Println("Done") return nil } func (l Location) RunCron() error { if l.Cron == "" { return nil } schedule, err := cron.ParseStandard(l.Cron) if err != nil { return err } last := time.Unix(lock.GetCron(l.name), 0) next := schedule.Next(last) now := time.Now() if now.After(next) { lock.SetCron(l.name, now.Unix()) l.Backup(true, "") } else { if !CRON_LEAN { colors.Body.Printf("Skipping \"%s\", not due yet.\n", l.name) } } return nil }