コード例 #1
0
ファイル: procurement.go プロジェクト: XbinZh/kubernetes
// NewExecutorResourceProcurer returns a Procurement procuring executor resources
// If a given offer has no executor IDs set, the given prototype executor resources are considered for procurement.
// If a given offer has one executor ID set, only pod resources are being procured.
// An offer with more than one executor ID implies an invariant violation and the first executor ID is being considered.
func NewExecutorResourceProcurer(rs []*mesos.Resource, registry executorinfo.Registry) Procurement {
	return ProcurementFunc(func(t *T, _ *api.Node, ps *ProcureState) error {
		eids := len(ps.offer.GetExecutorIds())
		switch {
		case eids == 0:
			wantedCpus := resources.Sum(resources.Filter(rs, resources.IsScalar, resources.HasName("cpus")))
			wantedMem := resources.Sum(resources.Filter(rs, resources.IsScalar, resources.HasName("mem")))

			procuredCpu, remaining := procureScalarResources("cpus", wantedCpus, t.FrameworkRoles, ps.offer.GetResources())
			if procuredCpu == nil {
				return fmt.Errorf("not enough cpu resources for executor: want=%v", wantedCpus)
			}

			procuredMem, remaining := procureScalarResources("mem", wantedMem, t.FrameworkRoles, remaining)
			if procuredMem == nil {
				return fmt.Errorf("not enough mem resources for executor: want=%v", wantedMem)
			}

			ps.offer.Resources = remaining
			ps.spec.Executor = registry.New(ps.offer.GetHostname(), append(procuredCpu, procuredMem...))
			return nil

		case eids == 1:
			e, err := registry.Get(ps.offer.GetHostname())
			if err != nil {
				return err
			}
			ps.spec.Executor = e
			return nil

		default:
			// offers with more than 1 ExecutorId should be rejected by the
			// framework long before they arrive here.
			return fmt.Errorf("got offer with more than 1 executor id: %v", ps.offer.GetExecutorIds())
		}
	})
}
コード例 #2
0
ファイル: procurement.go プロジェクト: XbinZh/kubernetes
// procureScalarResources procures offered resources that
// 1. Match the given name
// 2. Match the given roles
// 3. The given wanted scalar value can be fully consumed by offered resources
// Roles are being considered in the specified roles slice ordering.
func procureScalarResources(
	name string,
	want float64,
	roles []string,
	offered []*mesos.Resource,
) (procured, remaining []*mesos.Resource) {
	sorted := resources.ByRoles(roles...).Sort(offered)
	procured = make([]*mesos.Resource, 0, len(sorted))
	remaining = make([]*mesos.Resource, 0, len(sorted))

	for _, r := range sorted {
		if want >= epsilon && resources.MatchesAll(r, resources.HasName(name), resources.IsScalar) {
			left, role := r.GetScalar().GetValue(), r.Role
			consumed := math.Min(want, left)

			want -= consumed
			left -= consumed

			if left >= epsilon {
				r = mesosutil.NewScalarResource(name, left)
				r.Role = role
				remaining = append(remaining, r)
			}

			consumedRes := mesosutil.NewScalarResource(name, consumed)
			consumedRes.Role = role
			procured = append(procured, consumedRes)
		} else {
			remaining = append(remaining, r)
		}
	}

	// demanded value (want) was not fully consumed violating invariant 3.
	// thus no resources must be procured
	if want >= epsilon {
		return nil, offered
	}

	return
}