d38b8fa2c4
We use two different Node types in `overlay` and `uploadnodeselection` and converting back and forth. Using the same object would allow us to use a unified node selection interface everywhere. Change-Id: Ie71e29d60184ee0e5b4547eb54325f09c418f73c
139 lines
3.6 KiB
Go
139 lines
3.6 KiB
Go
// Copyright (C) 2020 Storj Labs, Inc.
|
|
// See LICENSE for copying information.
|
|
|
|
package uploadselection
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
|
|
"github.com/zeebo/errs"
|
|
|
|
"storj.io/common/storj"
|
|
"storj.io/common/storj/location"
|
|
)
|
|
|
|
// ErrNotEnoughNodes is when selecting nodes failed with the given parameters.
|
|
var ErrNotEnoughNodes = errs.Class("not enough nodes")
|
|
|
|
// State defines a node selector state that allows for selection.
|
|
type State struct {
|
|
mu sync.RWMutex
|
|
|
|
stats Stats
|
|
// netByID returns subnet based on storj.NodeID
|
|
netByID map[storj.NodeID]string
|
|
// distinct contains selectors for distinct selection.
|
|
distinct struct {
|
|
Reputable SelectBySubnet
|
|
New SelectBySubnet
|
|
}
|
|
}
|
|
|
|
// Stats contains state information.
|
|
type Stats struct {
|
|
New int
|
|
Reputable int
|
|
}
|
|
|
|
// Selector defines interface for selecting nodes.
|
|
type Selector interface {
|
|
// Count returns the number of maximum number of nodes that it can return.
|
|
Count() int
|
|
// Select selects up-to n nodes which are included by the criteria.
|
|
// empty criteria includes all the nodes
|
|
Select(n int, criteria Criteria) []*SelectedNode
|
|
}
|
|
|
|
// NewState returns a state based on the input.
|
|
func NewState(reputableNodes, newNodes []*SelectedNode) *State {
|
|
state := &State{}
|
|
|
|
state.netByID = map[storj.NodeID]string{}
|
|
for _, node := range reputableNodes {
|
|
state.netByID[node.ID] = node.LastNet
|
|
}
|
|
for _, node := range newNodes {
|
|
state.netByID[node.ID] = node.LastNet
|
|
}
|
|
|
|
state.distinct.Reputable = SelectBySubnetFromNodes(reputableNodes)
|
|
state.distinct.New = SelectBySubnetFromNodes(newNodes)
|
|
|
|
state.stats = Stats{
|
|
New: state.distinct.New.Count(),
|
|
Reputable: state.distinct.Reputable.Count(),
|
|
}
|
|
|
|
return state
|
|
}
|
|
|
|
// Request contains arguments for State.Request.
|
|
type Request struct {
|
|
Count int
|
|
NewFraction float64
|
|
ExcludedIDs []storj.NodeID
|
|
Placement storj.PlacementConstraint
|
|
ExcludedCountryCodes []string
|
|
}
|
|
|
|
// Select selects requestedCount nodes where there will be newFraction nodes.
|
|
func (state *State) Select(ctx context.Context, request Request) (_ []*SelectedNode, err error) {
|
|
defer mon.Task()(&ctx)(&err)
|
|
|
|
state.mu.RLock()
|
|
defer state.mu.RUnlock()
|
|
|
|
totalCount := request.Count
|
|
newCount := int(float64(totalCount) * request.NewFraction)
|
|
|
|
var selected []*SelectedNode
|
|
|
|
var reputableNodes Selector
|
|
var newNodes Selector
|
|
|
|
var criteria Criteria
|
|
|
|
if request.ExcludedIDs != nil {
|
|
criteria.ExcludeNodeIDs = request.ExcludedIDs
|
|
}
|
|
|
|
for _, code := range request.ExcludedCountryCodes {
|
|
criteria.ExcludedCountryCodes = append(criteria.ExcludedCountryCodes, location.ToCountryCode(code))
|
|
}
|
|
|
|
criteria.Placement = request.Placement
|
|
|
|
criteria.AutoExcludeSubnets = make(map[string]struct{})
|
|
for _, id := range request.ExcludedIDs {
|
|
if net, ok := state.netByID[id]; ok {
|
|
criteria.AutoExcludeSubnets[net] = struct{}{}
|
|
}
|
|
}
|
|
reputableNodes = state.distinct.Reputable
|
|
newNodes = state.distinct.New
|
|
|
|
// Get a random selection of new nodes out of the cache first so that if there aren't
|
|
// enough new nodes on the network, we can fall back to using reputable nodes instead.
|
|
selected = append(selected,
|
|
newNodes.Select(newCount, criteria)...)
|
|
|
|
// Get all the remaining reputable nodes.
|
|
reputableCount := totalCount - len(selected)
|
|
selected = append(selected,
|
|
reputableNodes.Select(reputableCount, criteria)...)
|
|
|
|
if len(selected) < totalCount {
|
|
return selected, ErrNotEnoughNodes.New("requested from cache %d, found %d", totalCount, len(selected))
|
|
}
|
|
return selected, nil
|
|
}
|
|
|
|
// Stats returns state information.
|
|
func (state *State) Stats() Stats {
|
|
state.mu.RLock()
|
|
defer state.mu.RUnlock()
|
|
|
|
return state.stats
|
|
}
|