mirror of
https://github.com/openziti/ziti.git
synced 2026-10-04 04:21:39 +00:00
Michael Quigley
89 lines
2.5 KiB
Go
89 lines
2.5 KiB
Go
/*
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Copyright NetFoundry, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package network
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import (
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"github.com/michaelquigley/pfxlog"
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"github.com/openziti/foundation/identity/identity"
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"sort"
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)
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func (network *Network) smart() {
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log := pfxlog.Logger()
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log.Debugf("smart network processing")
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/*
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* Order sessions in decreasing overall latency order
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*/
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sessions := network.GetAllSessions()
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log.Debugf("observing [%d] sessions", len(sessions))
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sessionLatencies := make(map[*identity.TokenId]int64)
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var orderedSessions []*identity.TokenId
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for _, s := range sessions {
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sessionLatencies[s.Id] = s.latency()
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orderedSessions = append(orderedSessions, s.Id)
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}
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sort.SliceStable(orderedSessions, func(i, j int) bool {
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iId := orderedSessions[i]
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jId := orderedSessions[j]
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return sessionLatencies[jId] < sessionLatencies[iId]
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})
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/* */
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/*
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* Develop candidates for rerouting.
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*/
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newCircuits := make(map[*session]*Circuit)
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var candidates []*session
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count := 0
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ceiling := int(float32(len(sessions)) * network.options.Smart.RerouteFraction)
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if ceiling < 1 {
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ceiling = 1
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}
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if ceiling > int(network.options.Smart.RerouteCap) {
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ceiling = int(network.options.Smart.RerouteCap)
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}
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log.Debugf("smart reroute ceiling [%d]", ceiling)
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for _, sId := range orderedSessions {
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if session, found := network.GetSession(sId); found {
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if updatedCircuit, err := network.UpdateCircuit(session.Circuit); err == nil {
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if !updatedCircuit.EqualPath(session.Circuit) {
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if count < ceiling {
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count++
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candidates = append(candidates, session)
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newCircuits[session] = updatedCircuit
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log.Infof("rerouting [s/%s] [l:%d] %s ==> %s", session.Id.Token, sessionLatencies[session.Id], session.Circuit.String(), updatedCircuit.String())
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}
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}
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}
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}
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}
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/* */
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/*
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* Reroute.
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*/
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for _, session := range candidates {
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if err := network.smartReroute(session, newCircuits[session]); err != nil {
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log.Errorf("error rerouting [s/%s] (%s)", session.Id.Token, err)
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}
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}
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/* */
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}
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