// initOnlineNodesGauge counts all nodes with status Online and initializes the
// OnlineNode Gauge with it. It also register a callback with the database to be notified
// of nodes going offline.
func initOnlineNodesGauge(store data.Nodeinfostore) {
OnlineNodes.Set(0.0)
for _, status := range store.GetNodeStatusInfos() {
if status.Online {
OnlineNodes.Inc()
}
}
store.NotifyNodeOffline(decrementOnlineNodes)
}
// initTotalClientsGauge iterates over all statistics
// and sums up the clients if all online nodes.
func initTotalClientsGauge(store data.Nodeinfostore) {
TotalClientCounter.Set(0.0)
var totalClients int = 0
for _, stats := range store.GetAllStatistics() {
status, err := store.GetNodeStatusInfo(stats.NodeId)
if err != nil {
log.WithFields(log.Fields{
"error": err,
"nodeId": stats.NodeId,
}).Warn("Didn't found node status in store")
}
if status.Online {
totalClients = totalClients + stats.Clients.Total
TotalClientCounter.Add(float64(stats.Clients.Total))
} else {
log.Debugf("Node %s was offline", status.NodeId)
}
}
}
// initTrafficCounter initialises the traffic counters with the accumulated traffic
// in all node statistics stored in the database at startup
func initTrafficCounter(store data.Nodeinfostore) {
TotalNodeTrafficRx.Set(0.0)
TotalNodeTrafficTx.Set(0.0)
TotalNodeMgmtTrafficRx.Set(0.0)
TotalNodeMgmtTrafficTx.Set(0.0)
for _, stats := range store.GetAllStatistics() {
if stats.Traffic != nil {
if b := stats.Traffic.Rx; b != nil {
TotalNodeTrafficRx.Add(float64(b.Bytes))
}
if b := stats.Traffic.Tx; b != nil {
TotalNodeTrafficTx.Add(float64(b.Bytes))
}
if b := stats.Traffic.MgmtRx; b != nil {
TotalNodeMgmtTrafficRx.Add(float64(b.Bytes))
}
if b := stats.Traffic.MgmtTx; b != nil {
TotalNodeMgmtTrafficTx.Add(float64(b.Bytes))
}
}
}
}
// ProcessStoredValues needs to be called at startup as soon as the data store is
// ready. This methods takes care if initializing all Metrics with values based on
// the last saved values.
func ProcessStoredValues(store data.Nodeinfostore) {
TotalNodes.Set(float64(len(store.GetNodeStatusInfos())))
initTotalClientsGauge(store)
initTrafficCounter(store)
initOnlineNodesGauge(store)
}