provisiond: sort the workloads from a reservation before sending it to

provisiond engine

fixes #683

pkg/provision/source.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"sort"
 	"sync"
 	"time"
 
@@ -39,6 +40,17 @@ type reservationPoller struct {
 	wl client.Workloads
 }
 
+// provisionOrder is used to sort the workload type
+// in the right order for provisiond
+var provisionOrder = map[ReservationType]int{
+	DebugReservation:      0,
+	NetworkReservation:    1,
+	ZDBReservation:        2,
+	VolumeReservation:     3,
+	ContainerReservation:  4,
+	KubernetesReservation: 5,
+}
+
 func (r *reservationPoller) Poll(nodeID pkg.Identifier, from uint64) ([]*Reservation, error) {
 	list, err := r.wl.Workloads(nodeID.Identity(), from)
 	if err != nil {
@@ -55,6 +67,11 @@ func (r *reservationPoller) Poll(nodeID pkg.Identifier, from uint64) ([]*Reserva
 		result = append(result, r)
 	}
 
+	// sorts the workloads in the oder they need to be processed by provisiond
+	sort.Slice(result, func(i int, j int) bool {
+		return provisionOrder[result[i].Type] < provisionOrder[result[j].Type]
+	})
+
 	return result, nil
 }