Golang Allocation.EvalID方法代码示例

// inplaceUpdate attempts to update allocations in-place where possible.
func inplaceUpdate(ctx Context, eval *structs.Evaluation, job *structs.Job,
	stack Stack, updates []allocTuple) []allocTuple {

	n := len(updates)
	inplace := 0
	for i := 0; i < n; i++ {
		// Get the update
		update := updates[i]

		// Check if the task drivers or config has changed, requires
		// a rolling upgrade since that cannot be done in-place.
		existing := update.Alloc.Job.LookupTaskGroup(update.TaskGroup.Name)
		if tasksUpdated(update.TaskGroup, existing) {
			continue
		}

		// Get the existing node
		node, err := ctx.State().NodeByID(update.Alloc.NodeID)
		if err != nil {
			ctx.Logger().Printf("[ERR] sched: %#v failed to get node '%s': %v",
				eval, update.Alloc.NodeID, err)
			continue
		}
		if node == nil {
			continue
		}

		// Set the existing node as the base set
		stack.SetNodes([]*structs.Node{node})

		// Stage an eviction of the current allocation. This is done so that
		// the current allocation is discounted when checking for feasability.
		// Otherwise we would be trying to fit the tasks current resources and
		// updated resources. After select is called we can remove the evict.
		ctx.Plan().AppendUpdate(update.Alloc, structs.AllocDesiredStatusStop,
			allocInPlace)

		// Attempt to match the task group
		option, size := stack.Select(update.TaskGroup)

		// Pop the allocation
		ctx.Plan().PopUpdate(update.Alloc)

		// Skip if we could not do an in-place update
		if option == nil {
			continue
		}

		// Restore the network offers from the existing allocation.
		// We do not allow network resources (reserved/dynamic ports)
		// to be updated. This is guarded in taskUpdated, so we can
		// safely restore those here.
		for task, resources := range option.TaskResources {
			existing := update.Alloc.TaskResources[task]
			resources.Networks = existing.Networks
		}

		// Create a shallow copy
		newAlloc := new(structs.Allocation)
		*newAlloc = *update.Alloc

		// Update the allocation
		newAlloc.EvalID = eval.ID
		newAlloc.Job = job
		newAlloc.Resources = size
		newAlloc.TaskResources = option.TaskResources
		newAlloc.Metrics = ctx.Metrics()
		newAlloc.DesiredStatus = structs.AllocDesiredStatusRun
		newAlloc.ClientStatus = structs.AllocClientStatusPending
		ctx.Plan().AppendAlloc(newAlloc)

		// Remove this allocation from the slice
		updates[i] = updates[n-1]
		i--
		n--
		inplace++
	}
	if len(updates) > 0 {
		ctx.Logger().Printf("[DEBUG] sched: %#v: %d in-place updates of %d", eval, inplace, len(updates))
	}
	return updates[:n]
}