frostfs-node/pkg/services/container/announcement/load/route/placement/calls.go
Alex Vanin e41e74b5fc [#872] services/container: Ignore passed routes in load router
Higher level solution for original issue with lost announcements
from single node container.

Signed-off-by: Alex Vanin <alexey@nspcc.ru>
2021-10-05 19:29:27 +03:00

46 lines
1.3 KiB
Go

package placementrouter
import (
"bytes"
"fmt"
"github.com/nspcc-dev/neofs-api-go/pkg/container"
loadroute "github.com/nspcc-dev/neofs-node/pkg/services/container/announcement/load/route"
)
// NextStage composes container nodes for the container and epoch from a,
// and returns the list of nodes with maximum weight (one from each vector).
//
// If passed route has more than one point, then endpoint of the route is reached.
//
// The traversed route is not checked, it is assumed to be correct.
func (b *Builder) NextStage(a container.UsedSpaceAnnouncement, passed []loadroute.ServerInfo) ([]loadroute.ServerInfo, error) {
if len(passed) > 1 {
return nil, nil
}
placement, err := b.placementBuilder.BuildPlacement(a.Epoch(), a.ContainerID())
if err != nil {
return nil, fmt.Errorf("could not build placement %s: %w", a.ContainerID(), err)
}
res := make([]loadroute.ServerInfo, 0, len(placement))
for i := range placement {
if len(placement[i]) == 0 {
continue
}
target := placement[i][0]
if len(passed) == 1 && bytes.Equal(passed[0].PublicKey(), target.PublicKey()) {
// add nil element so the announcement will be saved in local memory
res = append(res, nil)
} else {
// add element with remote node to send announcement to
res = append(res, target)
}
}
return res, nil
}