Adding force snapshot and force backup APIs (#73)

* Adding force snapshot and force backup APIs.

examples/client.go

@@ -644,12 +644,28 @@ func main() {
 		fmt.Println("GetJobs...role: ", role)
 		_, result, err := r.GetJobs(role)
 		if err != nil {
-			fmt.Print("error: %+v\n", err.Error())
+			fmt.Printf("error: %+v\n", err.Error())
 			os.Exit(1)
 		}
 		fmt.Println("map size: ", len(result.Configs))
 		fmt.Println(result.String())
 
+	case "snapshot":
+		fmt.Println("Forcing scheduler to write snapshot to mesos replicated log")
+		err := r.Snapshot()
+		if err != nil {
+			fmt.Printf("error: %+v\n", err.Error())
+			os.Exit(1)
+		}
+
+	case "performBackup":
+		fmt.Println("Writing Backup of Snapshot to file system")
+		err := r.PerformBackup()
+		if err != nil {
+			fmt.Printf("error: %+v\n", err.Error())
+			os.Exit(1)
+		}
+
 	default:
 		fmt.Println("Command not supported")
 		os.Exit(1)

realis.go

@@ -75,6 +75,8 @@ type Realis interface {
 	MaintenanceStatus(hosts ...string) (*aurora.Response, *aurora.MaintenanceStatusResult_, error)
 	SetQuota(role string, cpu *float64, ram *int64, disk *int64) (*aurora.Response, error)
 	GetQuota(role string) (*aurora.Response, error)
+	Snapshot() error
+	PerformBackup() error
 }
 
 type realisClient struct {
@@ -940,6 +942,10 @@ func (r *realisClient) RollbackJobUpdate(key aurora.JobUpdateKey, message string
 	return resp, nil
 }
 
+/* Admin functions */
+// TODO(rdelvalle): Consider moving these functions to another interface. It would be a backwards incompatible change,
+// but would add safety.
+
 // Set a list of nodes to DRAINING. This means nothing will be able to be scheduled on them and any existing
 // tasks will be killed and re-scheduled elsewhere in the cluster. Tasks from DRAINING nodes are not guaranteed
 // to return to running unless there is enough capacity in the cluster to run them.
@@ -1078,3 +1084,31 @@ func (r *realisClient) GetQuota(role string) (*aurora.Response, error) {
 
 	return resp, retryErr
 }
+
+// Force Aurora Scheduler to perform a snapshot and write to Mesos log
+func (r *realisClient) Snapshot() error {
+
+	_, retryErr := r.thriftCallWithRetries(func() (*aurora.Response, error) {
+		return r.adminClient.Snapshot()
+	})
+
+	if retryErr != nil {
+		return errors.Wrap(retryErr, "Unable to recover connection")
+	}
+
+	return nil
+}
+
+// Force Aurora Scheduler to write backup file to a file in the backup directory
+func (r *realisClient) PerformBackup() error {
+
+	_, retryErr := r.thriftCallWithRetries(func() (*aurora.Response, error) {
+		return r.adminClient.PerformBackup()
+	})
+
+	if retryErr != nil {
+		return errors.Wrap(retryErr, "Unable to recover connection")
+	}
+
+	return nil
+}

realis_e2e_test.go

@@ -143,12 +143,24 @@ func TestRealisClient_CreateJob_Thermos(t *testing.T) {
 	assert.True(t, success)
 	assert.NoError(t, err)
 
-	//Fetch all obs
+	//Fetch all Jobs
 	_, result, err := r.GetJobs(role)
 	fmt.Printf("GetJobs length: %+v \n", len(result.Configs))
 	assert.Equal(t, len(result.Configs), 1)
 	assert.NoError(t, err)
 
+	// Test asking the scheduler to perform a Snpshot
+	t.Run("TestRealisClient_Snapshot", func(t *testing.T) {
+		err := r.Snapshot()
+		assert.NoError(t, err)
+	})
+
+	// Test asking the scheduler to backup a Snapshot
+	t.Run("TestRealisClient_PerformBackup", func(t *testing.T) {
+		err := r.PerformBackup()
+		assert.NoError(t, err)
+	})
+
 	// Tasks must exist for it to, be killed
 	t.Run("TestRealisClient_KillJob_Thermos", func(t *testing.T) {
 		start := time.Now()