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Configuration error
Configuration error
File size: 2,919 Bytes
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package p2p
import (
"fmt"
"math/rand/v2"
"sync"
"github.com/rs/zerolog/log"
)
const FederatedID = "federated"
func NetworkID(networkID, serviceID string) string {
if networkID != "" {
return fmt.Sprintf("%s_%s", networkID, serviceID)
}
return serviceID
}
type FederatedServer struct {
sync.Mutex
listenAddr, service, p2ptoken string
requestTable map[string]int
loadBalanced bool
workerTarget string
}
func NewFederatedServer(listenAddr, service, p2pToken string, loadBalanced bool, workerTarget string) *FederatedServer {
return &FederatedServer{
listenAddr: listenAddr,
service: service,
p2ptoken: p2pToken,
requestTable: map[string]int{},
loadBalanced: loadBalanced,
workerTarget: workerTarget,
}
}
func (fs *FederatedServer) RandomServer() string {
var tunnelAddresses []string
for _, v := range GetAvailableNodes(fs.service) {
if v.IsOnline() {
tunnelAddresses = append(tunnelAddresses, v.ID)
} else {
delete(fs.requestTable, v.ID) // make sure it's not tracked
log.Info().Msgf("Node %s is offline", v.ID)
}
}
if len(tunnelAddresses) == 0 {
return ""
}
return tunnelAddresses[rand.IntN(len(tunnelAddresses))]
}
func (fs *FederatedServer) syncTableStatus() {
fs.Lock()
defer fs.Unlock()
currentTunnels := make(map[string]struct{})
for _, v := range GetAvailableNodes(fs.service) {
if v.IsOnline() {
fs.ensureRecordExist(v.ID)
currentTunnels[v.ID] = struct{}{}
}
}
// delete tunnels that don't exist anymore
for t := range fs.requestTable {
if _, ok := currentTunnels[t]; !ok {
delete(fs.requestTable, t)
}
}
}
func (fs *FederatedServer) SelectLeastUsedServer() string {
fs.syncTableStatus()
fs.Lock()
defer fs.Unlock()
log.Debug().Any("request_table", fs.requestTable).Msgf("SelectLeastUsedServer()")
// cycle over requestTable and find the entry with the lower number
// if there are multiple entries with the same number, select one randomly
// if there are no entries, return an empty string
var min int
var minKey string
for k, v := range fs.requestTable {
if min == 0 || v < min {
min = v
minKey = k
}
}
log.Debug().Any("requests_served", min).Any("request_table", fs.requestTable).Msgf("Selected tunnel %s", minKey)
return minKey
}
func (fs *FederatedServer) RecordRequest(nodeID string) {
fs.Lock()
defer fs.Unlock()
// increment the counter for the nodeID in the requestTable
fs.requestTable[nodeID]++
log.Debug().Any("request_table", fs.requestTable).Any("request", nodeID).Msgf("Recording request")
}
func (fs *FederatedServer) ensureRecordExist(nodeID string) {
// if the nodeID is not in the requestTable, add it with a counter of 0
_, ok := fs.requestTable[nodeID]
if !ok {
fs.requestTable[nodeID] = 0
}
log.Debug().Any("request_table", fs.requestTable).Any("request", nodeID).Msgf("Ensure record exists")
}
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