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apic_metrics.go
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/
apic_metrics.go
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package apiserver
import (
"context"
"time"
log "github.com/sirupsen/logrus"
"slices"
"github.com/crowdsecurity/go-cs-lib/ptr"
"github.com/crowdsecurity/go-cs-lib/trace"
"github.com/crowdsecurity/go-cs-lib/version"
"github.com/crowdsecurity/crowdsec/pkg/models"
)
func (a *apic) GetMetrics() (*models.Metrics, error) {
machines, err := a.dbClient.ListMachines()
if err != nil {
return nil, err
}
machinesInfo := make([]*models.MetricsAgentInfo, len(machines))
for i, machine := range machines {
machinesInfo[i] = &models.MetricsAgentInfo{
Version: machine.Version,
Name: machine.MachineId,
LastUpdate: machine.UpdatedAt.Format(time.RFC3339),
LastPush: ptr.OrEmpty(machine.LastPush).Format(time.RFC3339),
}
}
bouncers, err := a.dbClient.ListBouncers()
if err != nil {
return nil, err
}
bouncersInfo := make([]*models.MetricsBouncerInfo, len(bouncers))
for i, bouncer := range bouncers {
bouncersInfo[i] = &models.MetricsBouncerInfo{
Version: bouncer.Version,
CustomName: bouncer.Name,
Name: bouncer.Type,
LastPull: bouncer.LastPull.Format(time.RFC3339),
}
}
return &models.Metrics{
ApilVersion: ptr.Of(version.String()),
Machines: machinesInfo,
Bouncers: bouncersInfo,
}, nil
}
func (a *apic) fetchMachineIDs() ([]string, error) {
machines, err := a.dbClient.ListMachines()
if err != nil {
return nil, err
}
ret := make([]string, len(machines))
for i, machine := range machines {
ret[i] = machine.MachineId
}
// sorted slices are required for the slices.Equal comparison
slices.Sort(ret)
return ret, nil
}
// SendMetrics sends metrics to the API server until it receives a stop signal.
//
// Metrics are sent at start, then at the randomized metricsIntervalFirst,
// then at regular metricsInterval. If a change is detected in the list
// of machines, the next metrics are sent immediately.
func (a *apic) SendMetrics(stop chan (bool)) {
defer trace.CatchPanic("lapi/metricsToAPIC")
// verify the list of machines every <checkInt> interval
const checkInt = 20 * time.Second
// intervals must always be > 0
metInts := []time.Duration{1 * time.Millisecond, a.metricsIntervalFirst, a.metricsInterval}
log.Infof("Start sending metrics to CrowdSec Central API (interval: %s once, then %s)",
metInts[1].Round(time.Second), metInts[2])
count := -1
nextMetInt := func() time.Duration {
if count < len(metInts)-1 {
count++
}
return metInts[count]
}
machineIDs := []string{}
reloadMachineIDs := func() {
ids, err := a.fetchMachineIDs()
if err != nil {
log.Debugf("unable to get machines (%s), will retry", err)
return
}
machineIDs = ids
}
// store the list of machine IDs to compare
// with the next list
reloadMachineIDs()
checkTicker := time.NewTicker(checkInt)
metTicker := time.NewTicker(nextMetInt())
for {
select {
case <-stop:
checkTicker.Stop()
metTicker.Stop()
return
case <-checkTicker.C:
oldIDs := machineIDs
reloadMachineIDs()
if !slices.Equal(oldIDs, machineIDs) {
log.Infof("capi metrics: machines changed, immediate send")
metTicker.Reset(1 * time.Millisecond)
}
case <-metTicker.C:
metTicker.Stop()
metrics, err := a.GetMetrics()
if err != nil {
log.Errorf("unable to get metrics (%s)", err)
}
// metrics are nil if they could not be retrieved
if metrics != nil {
log.Info("capi metrics: sending")
_, _, err = a.apiClient.Metrics.Add(context.Background(), metrics)
if err != nil {
log.Errorf("capi metrics: failed: %s", err)
}
}
metTicker.Reset(nextMetInt())
case <-a.metricsTomb.Dying(): // if one apic routine is dying, do we kill the others?
checkTicker.Stop()
metTicker.Stop()
a.pullTomb.Kill(nil)
a.pushTomb.Kill(nil)
return
}
}
}