// processStatResults processes the given results, creating and setting DSStats, LastStats, and other stats. Note this is NOT threadsafe, and MUST NOT be called from multiple threads.
func processStatResults(
results []cache.Result,
statHistoryThreadsafe StatHistoryThreadsafe,
combinedStates peer.Crstates,
lastStats LastStatsThreadsafe,
toData todata.TOData,
errorCount UintThreadsafe,
dsStats DSStatsThreadsafe,
lastStatEndTimes map[enum.CacheName]time.Time,
lastStatDurationsThreadsafe DurationMapThreadsafe,
unpolledCaches UnpolledCachesThreadsafe,
) {
statHistory := statHistoryThreadsafe.Get().Copy()
maxStats := statHistoryThreadsafe.Max()
for _, result := range results {
// TODO determine if we want to add results with errors, or just print the errors now and don't add them.
statHistory[enum.CacheName(result.Id)] = pruneHistory(append(statHistory[enum.CacheName(result.Id)], result), maxStats)
}
statHistoryThreadsafe.Set(statHistory)
for _, result := range results {
log.Debugf("poll %v %v CreateStats start\n", result.PollID, time.Now())
}
newDsStats, newLastStats, err := ds.CreateStats(statHistory, toData, combinedStates, lastStats.Get().Copy(), time.Now())
for _, result := range results {
log.Debugf("poll %v %v CreateStats end\n", result.PollID, time.Now())
}
if err != nil {
errorCount.Inc()
log.Errorf("getting deliveryservice: %v\n", err)
} else {
dsStats.Set(newDsStats)
lastStats.Set(newLastStats)
}
endTime := time.Now()
lastStatDurations := lastStatDurationsThreadsafe.Get().Copy()
for _, result := range results {
if lastStatStart, ok := lastStatEndTimes[enum.CacheName(result.Id)]; ok {
d := time.Since(lastStatStart)
lastStatDurations[enum.CacheName(result.Id)] = d
}
lastStatEndTimes[enum.CacheName(result.Id)] = endTime
// log.Debugf("poll %v %v statfinish\n", result.PollID, endTime)
result.PollFinished <- result.PollID
}
lastStatDurationsThreadsafe.Set(lastStatDurations)
unpolledCaches.SetPolled(results, lastStats)
}
func (handler Handler) Handle(id string, r io.Reader, err error, pollId uint64, pollFinished chan<- uint64) {
log.Debugf("poll %v %v handle start\n", pollId, time.Now())
result := Result{
Id: enum.CacheName(id),
Available: false,
Errors: []error{},
Time: time.Now(), // TODO change this to be computed the instant we get the result back, to minimise inaccuracy
PollID: pollId,
PollFinished: pollFinished,
}
if err != nil {
log.Errorf("%v handler given error '%v'\n", id, err) // error here, in case the thing that called Handle didn't error
result.Errors = append(result.Errors, err)
handler.ResultChannel <- result
return
}
if r == nil {
log.Errorf("%v handle reader nil\n", id)
result.Errors = append(result.Errors, fmt.Errorf("handler got nil reader"))
handler.ResultChannel <- result
return
}
result.PrecomputedData.Reporting = true
if err := json.NewDecoder(r).Decode(&result.Astats); err != nil {
log.Errorf("%s procnetdev decode error '%v'\n", id, err)
result.Errors = append(result.Errors, err)
handler.ResultChannel <- result
return
}
if result.Astats.System.ProcNetDev == "" {
log.Warnf("addkbps %s procnetdev empty\n", id)
}
if result.Astats.System.InfSpeed == 0 {
log.Warnf("addkbps %s inf.speed empty\n", id)
}
log.Debugf("poll %v %v handle decode end\n", pollId, time.Now())
if err != nil {
result.Errors = append(result.Errors, err)
log.Errorf("addkbps handle %s error '%v'\n", id, err)
} else {
result.Available = true
}
if handler.Precompute() {
log.Debugf("poll %v %v handle precompute start\n", pollId, time.Now())
result = handler.precompute(result)
log.Debugf("poll %v %v handle precompute end\n", pollId, time.Now())
}
log.Debugf("poll %v %v handle write start\n", pollId, time.Now())
handler.ResultChannel <- result
log.Debugf("poll %v %v handle end\n", pollId, time.Now())
}
func CreateStats(statHistory map[enum.CacheName][]cache.Result, toData todata.TOData, crStates peer.Crstates, lastStats LastStats, now time.Time) (Stats, LastStats, error) {
start := time.Now()
dsStats := NewStats()
for deliveryService, _ := range toData.DeliveryServiceServers {
if deliveryService == "" {
log.Errorf("EMPTY CreateStats deliveryService")
continue
}
dsStats.DeliveryService[enum.DeliveryServiceName(deliveryService)] = *dsdata.NewStat()
}
dsStats = setStaticData(dsStats, toData.DeliveryServiceServers)
var err error
dsStats, err = addAvailableData(dsStats, crStates, toData.ServerCachegroups, toData.ServerDeliveryServices, toData.ServerTypes, statHistory) // TODO move after stat summarisation
if err != nil {
return dsStats, lastStats, fmt.Errorf("Error getting Cache availability data: %v", err)
}
for server, history := range statHistory {
if len(history) < 1 {
continue // TODO warn?
}
cachegroup, ok := toData.ServerCachegroups[server]
if !ok {
log.Warnf("server %s has no cachegroup, skipping\n", server)
continue
}
serverType, ok := toData.ServerTypes[enum.CacheName(server)]
if !ok {
log.Warnf("server %s not in CRConfig, skipping\n", server)
continue
}
result := history[len(history)-1]
// TODO check result.PrecomputedData.Errors
for ds, resultStat := range result.PrecomputedData.DeliveryServiceStats {
if ds == "" {
log.Errorf("EMPTY precomputed delivery service")
continue
}
if _, ok := dsStats.DeliveryService[ds]; !ok {
dsStats.DeliveryService[ds] = resultStat
continue
}
httpDsStat := dsStats.DeliveryService[ds]
httpDsStat.TotalStats = httpDsStat.TotalStats.Sum(resultStat.TotalStats)
httpDsStat.CacheGroups[cachegroup] = httpDsStat.CacheGroups[cachegroup].Sum(resultStat.CacheGroups[cachegroup])
httpDsStat.Types[serverType] = httpDsStat.Types[serverType].Sum(resultStat.Types[serverType])
httpDsStat.Caches[server] = httpDsStat.Caches[server].Sum(resultStat.Caches[server])
httpDsStat.CachesTimeReceived[server] = resultStat.CachesTimeReceived[server]
httpDsStat.CommonStats = dsStats.DeliveryService[ds].CommonStats
dsStats.DeliveryService[ds] = httpDsStat // TODO determine if necessary
}
}
perSecStats, lastStats := addPerSecStats(statHistory, dsStats, lastStats, now, toData.ServerCachegroups, toData.ServerTypes)
log.Infof("CreateStats took %v\n", time.Since(start))
return perSecStats, lastStats, nil
}
// getServerCachegroups gets the cachegroup of each ATS Edge+Mid Cache server, for the given CDN, from Traffic Ops.
// Returns a map[server]cachegroup.
func getServerCachegroups(crc CRConfig) (map[enum.CacheName]enum.CacheGroupName, error) {
serverCachegroups := map[enum.CacheName]enum.CacheGroupName{}
for server, serverData := range crc.ContentServers {
serverCachegroups[enum.CacheName(server)] = enum.CacheGroupName(serverData.CacheGroup)
}
return serverCachegroups, nil
}
func processStatPluginRemapStats(server string, stats map[enum.DeliveryServiceName]dsdata.Stat, toData todata.TOData, stat string, statParts []string, value interface{}) (map[enum.DeliveryServiceName]dsdata.Stat, error) {
if len(statParts) < 2 {
return stats, fmt.Errorf("stat has no remap_stats deliveryservice and name parts")
}
fqdn := strings.Join(statParts[:len(statParts)-1], ".")
ds, ok := toData.DeliveryServiceRegexes.DeliveryService(fqdn)
if !ok {
return stats, fmt.Errorf("ERROR no delivery service match for fqdn '%v' stat '%v'\n", fqdn, strings.Join(statParts, "."))
}
if ds == "" {
return stats, fmt.Errorf("ERROR EMPTY delivery service fqdn %v stat %v\n", fqdn, strings.Join(statParts, "."))
}
statName := statParts[len(statParts)-1]
dsStat, ok := stats[ds]
if !ok {
newStat := dsdata.NewStat()
dsStat = *newStat
}
if err := addCacheStat(&dsStat.Total, statName, value); err != nil {
return stats, err
}
cachegroup, ok := toData.ServerCachegroups[enum.CacheName(server)]
if !ok {
return stats, fmt.Errorf("server missing from TOData.ServerCachegroups") // TODO check logs, make sure this isn't normal
}
dsStat.CacheGroups[cachegroup] = dsStat.Total
cacheType, ok := toData.ServerTypes[enum.CacheName(server)]
if !ok {
return stats, fmt.Errorf("server missing from TOData.ServerTypes")
}
dsStat.Type[cacheType] = dsStat.Total
stats[ds] = dsStat
return stats, nil
}
// getServerTypes gets the cache type of each ATS Edge+Mid Cache server, for the given CDN, from Traffic Ops.
func getServerTypes(crc CRConfig) (map[enum.CacheName]enum.CacheType, error) {
serverTypes := map[enum.CacheName]enum.CacheType{}
for server, serverData := range crc.ContentServers {
t := enum.CacheTypeFromString(serverData.Type)
if t == enum.CacheTypeInvalid {
return nil, fmt.Errorf("getServerTypes CRConfig unknown type for '%s': '%s'", server, serverData.Type)
}
serverTypes[enum.CacheName(server)] = t
}
return serverTypes, nil
}
func createApiPeerStates(peerStates map[string]peer.Crstates) ApiPeerStates {
apiPeerStates := ApiPeerStates{Peers: map[enum.TrafficMonitorName]map[enum.CacheName][]CacheState{}}
for peer, state := range peerStates {
if _, ok := apiPeerStates.Peers[enum.TrafficMonitorName(peer)]; !ok {
apiPeerStates.Peers[enum.TrafficMonitorName(peer)] = map[enum.CacheName][]CacheState{}
}
peerState := apiPeerStates.Peers[enum.TrafficMonitorName(peer)]
for cache, available := range state.Caches {
peerState[enum.CacheName(cache)] = []CacheState{CacheState{Value: available.IsAvailable}}
}
apiPeerStates.Peers[enum.TrafficMonitorName(peer)] = peerState
}
return apiPeerStates
}
func processHealthResult(cacheHealthChan <-chan cache.Result, toData todata.TODataThreadsafe, localStates peer.CRStatesThreadsafe, lastHealthDurations DurationMapThreadsafe, statHistory StatHistoryThreadsafe, monitorConfig TrafficMonitorConfigMapThreadsafe, peerStates peer.CRStatesPeersThreadsafe, combinedStates peer.CRStatesThreadsafe, fetchCount UintThreadsafe, errorCount UintThreadsafe, events EventsThreadsafe, localCacheStatus CacheAvailableStatusThreadsafe, lastHealthEndTimes map[enum.CacheName]time.Time, healthHistory map[enum.CacheName][]cache.Result, results []cache.Result) {
if len(results) == 0 {
return
}
toDataCopy := toData.Get() // create a copy, so the same data used for all processing of this cache health result
monitorConfigCopy := monitorConfig.Get() // copy now, so all calculations are on the same data
for _, healthResult := range results {
log.Debugf("poll %v %v healthresultman start\n", healthResult.PollID, time.Now())
fetchCount.Inc()
var prevResult cache.Result
healthResultHistory := healthHistory[enum.CacheName(healthResult.Id)]
// healthResultHistory := healthHistory.Get(enum.CacheName(healthResult.Id))
if len(healthResultHistory) != 0 {
prevResult = healthResultHistory[len(healthResultHistory)-1]
}
health.GetVitals(&healthResult, &prevResult, &monitorConfigCopy)
// healthHistory.Set(enum.CacheName(healthResult.Id), pruneHistory(append(healthHistory.Get(enum.CacheName(healthResult.Id)), healthResult), defaultMaxHistory))
healthHistory[enum.CacheName(healthResult.Id)] = pruneHistory(append(healthHistory[enum.CacheName(healthResult.Id)], healthResult), defaultMaxHistory)
isAvailable, whyAvailable := health.EvalCache(healthResult, &monitorConfigCopy)
if localStates.Get().Caches[healthResult.Id].IsAvailable != isAvailable {
log.Infof("Changing state for %s was: %t now: %t because %s errors: %v", healthResult.Id, prevResult.Available, isAvailable, whyAvailable, healthResult.Errors)
events.Add(Event{Time: time.Now().Unix(), Description: whyAvailable, Name: healthResult.Id, Hostname: healthResult.Id, Type: toDataCopy.ServerTypes[enum.CacheName(healthResult.Id)].String(), Available: isAvailable})
}
localCacheStatus.Set(enum.CacheName(healthResult.Id), CacheAvailableStatus{Available: isAvailable, Status: monitorConfigCopy.TrafficServer[healthResult.Id].Status}) // TODO move within localStates
localStates.SetCache(healthResult.Id, peer.IsAvailable{IsAvailable: isAvailable})
log.Debugf("poll %v %v calculateDeliveryServiceState start\n", healthResult.PollID, time.Now())
calculateDeliveryServiceState(toDataCopy.DeliveryServiceServers, localStates)
log.Debugf("poll %v %v calculateDeliveryServiceState end\n", healthResult.PollID, time.Now())
}
// TODO determine if we should combineCrStates() here
for _, healthResult := range results {
if lastHealthStart, ok := lastHealthEndTimes[enum.CacheName(healthResult.Id)]; ok {
d := time.Since(lastHealthStart)
lastHealthDurations.Set(enum.CacheName(healthResult.Id), d)
}
lastHealthEndTimes[enum.CacheName(healthResult.Id)] = time.Now()
log.Debugf("poll %v %v finish\n", healthResult.PollID, time.Now())
healthResult.PollFinished <- healthResult.PollID
}
}
func createCacheStatuses(cacheTypes map[enum.CacheName]enum.CacheType, statHistory map[enum.CacheName][]cache.Result, lastHealthDurations map[enum.CacheName]time.Duration, cacheStates map[string]peer.IsAvailable, lastKbpsStats ds.StatsLastKbps, localCacheStatusThreadsafe CacheAvailableStatusThreadsafe) map[enum.CacheName]CacheStatus {
conns := createCacheConnections(statHistory)
statii := map[enum.CacheName]CacheStatus{}
localCacheStatus := localCacheStatusThreadsafe.Get()
for cacheName, cacheType := range cacheTypes {
cacheStatHistory, ok := statHistory[cacheName]
if !ok {
log.Warnf("createCacheStatuses stat history missing cache %s\n", cacheName)
continue
}
if len(cacheStatHistory) < 1 {
log.Warnf("createCacheStatuses stat history empty for cache %s\n", cacheName)
continue
}
log.Debugf("createCacheStatuses NOT empty for cache %s\n", cacheName)
var loadAverage *float64
procLoadAvg := cacheStatHistory[0].Astats.System.ProcLoadavg
if procLoadAvg != "" {
firstSpace := strings.IndexRune(procLoadAvg, ' ')
if firstSpace == -1 {
log.Warnf("WARNING unexpected proc.loadavg '%s' for cache %s\n", procLoadAvg, cacheName)
} else {
loadAverageVal, err := strconv.ParseFloat(procLoadAvg[:firstSpace], 64)
if err != nil {
log.Warnf("proc.loadavg doesn't contain a float prefix '%s' for cache %s\n", procLoadAvg, cacheName)
} else {
loadAverage = &loadAverageVal
}
}
}
var queryTime *int64
queryTimeVal, ok := lastHealthDurations[cacheName]
if !ok {
log.Warnf("cache not in last health durations cache %s\n", cacheName)
} else {
queryTimeInt := int64(queryTimeVal / time.Millisecond)
queryTime = &queryTimeInt
}
var kbps *float64
kbpsVal, ok := lastKbpsStats.Caches[enum.CacheName(cacheName)]
if !ok {
log.Warnf("cache not in last kbps cache %s\n", cacheName)
} else {
kbps = &kbpsVal.Kbps
}
var connections *int64
connectionsVal, ok := conns[enum.CacheName(cacheName)]
if !ok {
log.Warnf("cache not in connections %s\n", cacheName)
} else {
connections = &connectionsVal
}
var status *string
statusVal, ok := localCacheStatus[enum.CacheName(cacheName)]
if !ok {
log.Warnf("cache not in statuses %s\n", cacheName)
} else {
statusString := statusVal.Status + " - "
if localCacheStatus[enum.CacheName(cacheName)].Available {
statusString += "available"
} else {
statusString += "unavailable"
}
status = &statusString
}
cacheTypeStr := string(cacheType)
statii[enum.CacheName(cacheName)] = CacheStatus{Type: &cacheTypeStr, LoadAverage: loadAverage, QueryTimeMilliseconds: queryTime, BandwidthKbps: kbps, ConnectionCount: connections, Status: status}
}
return statii
}
func addAvailableData(dsStats Stats, crStates peer.Crstates, serverCachegroups map[enum.CacheName]enum.CacheGroupName, serverDs map[enum.CacheName][]enum.DeliveryServiceName, serverTypes map[enum.CacheName]enum.CacheType, statHistory map[enum.CacheName][]cache.Result) (Stats, error) {
for cache, available := range crStates.Caches {
cacheGroup, ok := serverCachegroups[cache]
if !ok {
log.Warnf("CreateStats not adding availability data for '%s': not found in Cachegroups\n", cache)
continue
}
deliveryServices, ok := serverDs[cache]
if !ok {
log.Warnf("CreateStats not adding availability data for '%s': not found in DeliveryServices\n", cache)
continue
}
cacheType, ok := serverTypes[enum.CacheName(cache)]
if !ok {
log.Warnf("CreateStats not adding availability data for '%s': not found in Server Types\n", cache)
continue
}
for _, deliveryService := range deliveryServices {
if deliveryService == "" {
log.Errorf("EMPTY addAvailableData DS") // various bugs in other functions can cause this - this will help identify and debug them.
continue
}
stat, ok := dsStats.DeliveryService[enum.DeliveryServiceName(deliveryService)]
if !ok {
log.Warnf("CreateStats not adding availability data for '%s': not found in Stats\n", cache)
continue // TODO log warning? Error?
}
if available.IsAvailable {
// c.IsAvailable.Value
stat.CommonStats.IsAvailable.Value = true
stat.CommonStats.CachesAvailableNum.Value++
cacheGroupStats := stat.CacheGroups[enum.CacheGroupName(cacheGroup)]
cacheGroupStats.IsAvailable.Value = true
stat.CacheGroups[enum.CacheGroupName(cacheGroup)] = cacheGroupStats
stat.TotalStats.IsAvailable.Value = true
typeStats := stat.Types[cacheType]
typeStats.IsAvailable.Value = true
stat.Types[cacheType] = typeStats
}
// TODO fix nested ifs
if results, ok := statHistory[enum.CacheName(cache)]; ok {
if len(results) < 1 {
log.Warnf("no results %v %v\n", cache, deliveryService)
} else {
result := results[0]
if result.PrecomputedData.Reporting {
stat.CommonStats.CachesReporting[enum.CacheName(cache)] = true
} else {
log.Debugf("no reporting %v %v\n", cache, deliveryService)
}
}
} else {
log.Debugf("no result for %v %v\n", cache, deliveryService)
}
dsStats.DeliveryService[enum.DeliveryServiceName(deliveryService)] = stat // TODO Necessary? Remove?
}
}
return dsStats, nil
}
// NewPeerStateFilter takes the HTTP query parameters and creates a cache.Filter, filtering according to the query parameters passed.
// Query parameters used are `hc`, `stats`, `wildcard`, `typep`, and `hosts`. The `stats` param filters caches. The `hosts` param filters peer Traffic Monitors. The `type` param filters cache types (edge, mid).
// If `hc` is 0, all history is returned. If `hc` is empty, 1 history is returned.
// If `stats` is empty, all stats are returned.
// If `wildcard` is empty, `stats` is considered exact.
// If `type` is empty, all cache types are returned.
func NewPeerStateFilter(params url.Values, cacheTypes map[enum.CacheName]enum.CacheType) (*PeerStateFilter, error) {
// TODO change legacy `stats` and `hosts` to `caches` and `monitors` (or `peers`).
validParams := map[string]struct{}{"hc": struct{}{}, "stats": struct{}{}, "wildcard": struct{}{}, "type": struct{}{}, "peers": struct{}{}}
if len(params) > len(validParams) {
return nil, fmt.Errorf("invalid query parameters")
}
for param, _ := range params {
if _, ok := validParams[param]; !ok {
return nil, fmt.Errorf("invalid query parameter '%v'", param)
}
}
historyCount := 1
if paramHc, exists := params["hc"]; exists && len(paramHc) > 0 {
v, err := strconv.Atoi(paramHc[0])
if err == nil {
historyCount = v
}
}
cachesToUse := map[enum.CacheName]struct{}{}
// TODO rename 'stats' to 'caches'
if paramStats, exists := params["stats"]; exists && len(paramStats) > 0 {
commaStats := strings.Split(paramStats[0], ",")
for _, stat := range commaStats {
cachesToUse[enum.CacheName(stat)] = struct{}{}
}
}
wildcard := false
if paramWildcard, exists := params["wildcard"]; exists && len(paramWildcard) > 0 {
wildcard, _ = strconv.ParseBool(paramWildcard[0]) // ignore errors, error => false
}
cacheType := enum.CacheTypeInvalid
if paramType, exists := params["type"]; exists && len(paramType) > 0 {
cacheType = enum.CacheTypeFromString(paramType[0])
if cacheType == enum.CacheTypeInvalid {
return nil, fmt.Errorf("invalid query parameter type '%v' - valid types are: {edge, mid}", paramType[0])
}
}
peersToUse := map[enum.TrafficMonitorName]struct{}{}
if paramNames, exists := params["peers"]; exists && len(paramNames) > 0 {
commaNames := strings.Split(paramNames[0], ",")
for _, name := range commaNames {
peersToUse[enum.TrafficMonitorName(name)] = struct{}{}
}
}
// parameters without values are considered names, e.g. `?my-cache-0` or `?my-delivery-service`
for maybeName, val := range params {
if len(val) == 0 || (len(val) == 1 && val[0] == "") {
peersToUse[enum.TrafficMonitorName(maybeName)] = struct{}{}
}
}
return &PeerStateFilter{
historyCount: historyCount,
cachesToUse: cachesToUse,
wildcard: wildcard,
cacheType: cacheType,
peersToUse: peersToUse,
cacheTypes: cacheTypes,
}, nil
}
// NewCacheStatFilter takes the HTTP query parameters and creates a CacheStatFilter which fulfills the `cache.Filter` interface, filtering according to the query parameters passed.
// Query parameters used are `hc`, `stats`, `wildcard`, `type`, and `hosts`.
// If `hc` is 0, all history is returned. If `hc` is empty, 1 history is returned.
// If `stats` is empty, all stats are returned.
// If `wildcard` is empty, `stats` is considered exact.
// If `type` is empty, all cache types are returned.
func NewCacheStatFilter(params url.Values, cacheTypes map[enum.CacheName]enum.CacheType) (cache.Filter, error) {
validParams := map[string]struct{}{"hc": struct{}{}, "stats": struct{}{}, "wildcard": struct{}{}, "type": struct{}{}, "hosts": struct{}{}}
if len(params) > len(validParams) {
return nil, fmt.Errorf("invalid query parameters")
}
for param, _ := range params {
if _, ok := validParams[param]; !ok {
return nil, fmt.Errorf("invalid query parameter '%v'", param)
}
}
historyCount := 1
if paramHc, exists := params["hc"]; exists && len(paramHc) > 0 {
v, err := strconv.Atoi(paramHc[0])
if err == nil {
historyCount = v
}
}
statsToUse := map[string]struct{}{}
if paramStats, exists := params["stats"]; exists && len(paramStats) > 0 {
commaStats := strings.Split(paramStats[0], ",")
for _, stat := range commaStats {
statsToUse[stat] = struct{}{}
}
}
wildcard := false
if paramWildcard, exists := params["wildcard"]; exists && len(paramWildcard) > 0 {
wildcard, _ = strconv.ParseBool(paramWildcard[0]) // ignore errors, error => false
}
cacheType := enum.CacheTypeInvalid
if paramType, exists := params["type"]; exists && len(paramType) > 0 {
cacheType = enum.CacheTypeFromString(paramType[0])
if cacheType == enum.CacheTypeInvalid {
return nil, fmt.Errorf("invalid query parameter type '%v' - valid types are: {edge, mid}", paramType[0])
}
}
hosts := map[enum.CacheName]struct{}{}
if paramHosts, exists := params["hosts"]; exists && len(paramHosts) > 0 {
commaHosts := strings.Split(paramHosts[0], ",")
for _, host := range commaHosts {
hosts[enum.CacheName(host)] = struct{}{}
}
}
// parameters without values are considered hosts, e.g. `?my-cache-0`
for maybeHost, val := range params {
if len(val) == 0 || (len(val) == 1 && val[0] == "") {
hosts[enum.CacheName(maybeHost)] = struct{}{}
}
}
return &CacheStatFilter{
historyCount: historyCount,
statsToUse: statsToUse,
wildcard: wildcard,
cacheType: cacheType,
hosts: hosts,
cacheTypes: cacheTypes,
}, nil
}
// TODO timing, and determine if the case, or its internal `for`, should be put in a goroutine
// TODO determine if subscribers take action on change, and change to mutexed objects if not.
func monitorConfigListen(monitorConfigTS TrafficMonitorConfigMapThreadsafe, monitorConfigPollChan <-chan to.TrafficMonitorConfigMap, localStates peer.CRStatesThreadsafe, statUrlSubscriber chan<- poller.HttpPollerConfig, healthUrlSubscriber chan<- poller.HttpPollerConfig, peerUrlSubscriber chan<- poller.HttpPollerConfig, cfg config.Config, staticAppData StaticAppData) {
for {
select {
case monitorConfig := <-monitorConfigPollChan:
monitorConfigTS.Set(monitorConfig)
healthUrls := map[string]string{}
statUrls := map[string]string{}
peerUrls := map[string]string{}
caches := map[string]string{}
for _, srv := range monitorConfig.TrafficServer {
caches[srv.HostName] = srv.Status
cacheName := enum.CacheName(srv.HostName)
if srv.Status == "ONLINE" {
localStates.SetCache(cacheName, peer.IsAvailable{IsAvailable: true})
continue
}
if srv.Status == "OFFLINE" {
localStates.SetCache(cacheName, peer.IsAvailable{IsAvailable: false})
continue
}
// seed states with available = false until our polling cycle picks up a result
if _, exists := localStates.Get().Caches[cacheName]; !exists {
localStates.SetCache(cacheName, peer.IsAvailable{IsAvailable: false})
}
url := monitorConfig.Profile[srv.Profile].Parameters.HealthPollingURL
r := strings.NewReplacer(
"${hostname}", srv.FQDN,
"${interface_name}", srv.InterfaceName,
"application=system", "application=plugin.remap",
"application=", "application=plugin.remap",
)
url = r.Replace(url)
healthUrls[srv.HostName] = url
r = strings.NewReplacer("application=plugin.remap", "application=")
url = r.Replace(url)
statUrls[srv.HostName] = url
}
for _, srv := range monitorConfig.TrafficMonitor {
if srv.HostName == staticAppData.Hostname {
continue
}
if srv.Status != "ONLINE" {
continue
}
// TODO: the URL should be config driven. -jse
url := fmt.Sprintf("http://%s:%d/publish/CrStates?raw", srv.IP, srv.Port)
peerUrls[srv.HostName] = url
}
statUrlSubscriber <- poller.HttpPollerConfig{Urls: statUrls, Interval: cfg.CacheStatPollingInterval}
healthUrlSubscriber <- poller.HttpPollerConfig{Urls: healthUrls, Interval: cfg.CacheHealthPollingInterval}
peerUrlSubscriber <- poller.HttpPollerConfig{Urls: peerUrls, Interval: cfg.PeerPollingInterval}
for cacheName := range localStates.GetCaches() {
if _, exists := monitorConfig.TrafficServer[string(cacheName)]; !exists {
log.Warnf("Removing %s from localStates", cacheName)
localStates.DeleteCache(cacheName)
}
}
// TODO because there are multiple writers to localStates.DeliveryService, there is a race condition, where MonitorConfig (this func) and HealthResultManager could write at the same time, and the HealthResultManager could overwrite a delivery service addition or deletion here. Probably the simplest and most performant fix would be a lock-free algorithm using atomic compare-and-swaps.
for _, ds := range monitorConfig.DeliveryService {
// since caches default to unavailable, also default DS false
if _, exists := localStates.Get().Deliveryservice[enum.DeliveryServiceName(ds.XMLID)]; !exists {
localStates.SetDeliveryService(enum.DeliveryServiceName(ds.XMLID), peer.Deliveryservice{IsAvailable: false, DisabledLocations: []enum.CacheName{}}) // important to initialize DisabledLocations, so JSON is `[]` not `null`
}
}
for ds, _ := range localStates.Get().Deliveryservice {
if _, exists := monitorConfig.DeliveryService[string(ds)]; !exists {
localStates.DeleteDeliveryService(ds)
}
}
}
}
}
