Add health apis

job.go

@@ -225,12 +225,25 @@ func (j Job) Healthy() (bool, error) {
 }
 
 func (j Job) Run() {
+	result := JobResult{
+		JobName:   j.Name,
+		JobType:   "backup",
+		Success:   true,
+		LastError: nil,
+		Message:   "",
+	}
+
 	if err := j.RunBackup(); err != nil {
 		j.healthy = false
 		j.lastErr = err
 
-		j.Logger().Printf("ERROR: Backup failed: %v", err)
+		j.Logger().Printf("ERROR: Backup failed: %s", err.Error())
+
+		result.Success = false
+		result.LastError = err
 	}
+
+	JobComplete(result)
 }
 
 func (j Job) NewRestic() *Restic {

main.go

@@ -136,6 +136,7 @@ func main() {
 	backup := flag.String("backup", "", "Run backup jobs now. Names are comma separated and `all` will run all.")
 	restore := flag.String("restore", "", "Run restore jobs now. Names are comma separated and `all` will run all.")
 	once := flag.Bool("once", false, "Run jobs specified using -backup and -restore once and exit")
+	healthCheckAddr := flag.String("addr", "0.0.0.0:8080", "address to bind health check API")
 	flag.StringVar(&JobBaseDir, "base-dir", JobBaseDir, "Base dir to create intermediate job files like SQL dumps.")
 	flag.Parse()
 
@@ -174,6 +175,10 @@ func main() {
 		return
 	}
 
+	go func() {
+		_ = RunHTTPHandlers(*healthCheckAddr)
+	}()
+
 	// TODO: Add healthcheck handler using Job.Healthy()
 	if err := ScheduleAndRunJobs(jobs); err != nil {
 		log.Fatalf("failed running jobs: %v", err)

restic.go

@@ -241,6 +241,33 @@ func (rcmd Restic) BuildEnv() []string {
 	return envList
 }
 
+type ResticError struct {
+	OriginalError error
+	Command       string
+	Output        []string
+}
+
+func NewResticError(command string, output []string, originalError error) *ResticError {
+	return &ResticError{
+		OriginalError: originalError,
+		Command:       command,
+		Output:        output,
+	}
+}
+
+func (e *ResticError) Error() string {
+	return fmt.Sprintf(
+		"error running restic %s: %s\nOutput:\n%s",
+		e.Command,
+		e.OriginalError,
+		strings.Join(e.Output, "\n"),
+	)
+}
+
+func (e *ResticError) Unwrap() error {
+	return e.OriginalError
+}
+
 func (rcmd Restic) RunRestic(command string, options CommandOptions, commandArgs ...string) ([]string, error) {
 	args := []string{}
 	if rcmd.GlobalOpts != nil {
@@ -265,7 +292,7 @@ func (rcmd Restic) RunRestic(command string, options CommandOptions, commandArgs
 			responseErr = ErrRepoNotFound
 		}
 
-		return output.Lines, fmt.Errorf("error running restic %s: %w", command, responseErr)
+		return output.Lines, NewResticError(command, output.Lines, responseErr)
 	}
 
 	return output.Lines, nil

scheduler.go

@@ -1,40 +1,102 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
+	"net/http"
 	"os"
 	"os/signal"
+	"sync"
 	"syscall"
 
 	"github.com/robfig/cron/v3"
 )
 
+var jobResultsLock = sync.Mutex{}
+var jobResults = map[string]JobResult{}
+
+type JobResult struct {
+	JobName   string
+	JobType   string
+	Success   bool
+	LastError error
+	Message   string
+}
+
+func (r JobResult) Format() string {
+	return fmt.Sprintf("%s %s ok? %v\n\n%+v", r.JobName, r.JobType, r.Success, r.LastError)
+}
+
+func JobComplete(result JobResult) {
+	fmt.Printf("Completed job %+v\n", result)
+
+	jobResultsLock.Lock()
+	jobResults[result.JobName] = result
+	jobResultsLock.Unlock()
+}
+
+func writeJobResult(writer http.ResponseWriter, jobName string) {
+	if jobResult, ok := jobResults[jobName]; ok {
+		if !jobResult.Success {
+			writer.WriteHeader(http.StatusServiceUnavailable)
+		}
+
+		jobResult.Message = jobResult.LastError.Error()
+		if err := json.NewEncoder(writer).Encode(jobResult); err != nil {
+			_, _ = writer.Write([]byte(fmt.Sprintf("failed writing json for %s", jobResult.Format())))
+		}
+
+		writer.Header().Set("Content-Type", "application/json")
+	} else {
+		writer.WriteHeader(http.StatusNotFound)
+		_, _ = writer.Write([]byte("{\"Message\": \"Unknown job\"}"))
+	}
+}
+
+func healthHandleFunc(writer http.ResponseWriter, request *http.Request) {
+	query := request.URL.Query()
+	if jobName, ok := query["job"]; ok {
+		writeJobResult(writer, jobName[0])
+
+		return
+	}
+
+	_, _ = writer.Write([]byte("ok"))
+}
+
+func RunHTTPHandlers(addr string) error {
+	http.HandleFunc("/health", healthHandleFunc)
+
+	return fmt.Errorf("error on healthcheck: %w", http.ListenAndServe(addr, nil))
+}
+
 func ScheduleAndRunJobs(jobs []Job) error {
 	signalChan := make(chan os.Signal, 1)
 
-	signal.Notify(signalChan,
+	signal.Notify(
+		signalChan,
 		syscall.SIGINT,
 		syscall.SIGTERM,
 		syscall.SIGQUIT,
 	)
 
-	runner := cron.New()
+	scheduler := cron.New()
 
 	for _, job := range jobs {
 		fmt.Println("Scheduling", job.Name)
 
-		if _, err := runner.AddJob(job.Schedule, job); err != nil {
+		if _, err := scheduler.AddJob(job.Schedule, job); err != nil {
-			return fmt.Errorf("Error scheduling job %s: %w", job.Name, err)
+			return fmt.Errorf("error scheduling job %s: %w", job.Name, err)
 		}
 	}
 
-	runner.Start()
+	scheduler.Start()
 
 	switch <-signalChan {
 	case syscall.SIGINT:
 		fmt.Println("Stopping now...")
 
-		defer runner.Stop()
+		defer scheduler.Stop()
 
 		return nil
 	case syscall.SIGTERM:
@@ -44,7 +106,7 @@ func ScheduleAndRunJobs(jobs []Job) error {
 		fmt.Println("Stopping after running jobs complete...")
 
 		defer func() {
-			ctx := runner.Stop()
+			ctx := scheduler.Stop()
 			<-ctx.Done()
 		}()
 

tasks.go

@@ -223,7 +223,7 @@ func (t BackupFilesTask) RunBackup(cfg TaskConfig) error {
 
 	if err := cfg.Restic.Backup(cfg.BackupPaths, *t.BackupOpts); err != nil {
 		err = fmt.Errorf("failed backing up paths: %w", err)
-		cfg.Logger.Fatal(err)
+		cfg.Logger.Print(err)
 
 		return err
 	}
@@ -239,7 +239,7 @@ func (t BackupFilesTask) RunRestore(cfg TaskConfig) error {
 	// TODO: Make the snapshot configurable
 	if err := cfg.Restic.Restore("latest", *t.RestoreOpts); err != nil {
 		err = fmt.Errorf("failed restoring paths: %w", err)
-		cfg.Logger.Fatal(err)
+		cfg.Logger.Print(err)
 
 		return err
 	}

test/test.hcl

@@ -1,40 +1,37 @@
 job "TestBackup" {
-  schedule = "1 * * * *"
+  schedule = "* * * * *"
 
   config {
-    repo = "./backups"
+    repo = "test/data/backups"
     passphrase = "supersecret"
 
     options {
-      CacheDir = "./cache"
+      CacheDir = "test/data/cache"
     }
   }
 
-  task "before script" {
+  task "create test data" {
-    script {
+    pre_script {
-      on_backup = "echo before backup!"
+      on_backup = "echo test > test/data/data/test.txt"
     }
   }
 
-  task "backup" {
+  task "backup phases" {
-    backup {
+    pre_script {
-      files = [
+      on_backup = "echo 'pre-backup'"
-        "./data"
+      on_restore = "echo 'pre-restore'"
-      ]
+    }
 
-      backup_opts {
+    post_script {
-        Tags = ["foo"]
+      on_backup = "echo 'post-backup'"
-      }
+      on_restore = "echo 'post-restore'"
-
-      restore_opts {
-        Target = "."
-      }
     }
   }
 
-  task "after script" {
+  backup {
-    script {
+    paths = ["./test/data/data"]
-      on_backup = "echo after backup!"
+    restore_opts {
+      Target = "."
     }
   }