forked from grafana/loki
/
targetmanager.go
73 lines (64 loc) · 1.83 KB
/
targetmanager.go
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package kafka
import (
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/pao214/loki/v2/clients/pkg/promtail/api"
"github.com/pao214/loki/v2/clients/pkg/promtail/scrapeconfig"
"github.com/pao214/loki/v2/clients/pkg/promtail/targets/target"
)
// TargetManager manages a series of kafka targets.
type TargetManager struct {
logger log.Logger
targetSyncers map[string]*TargetSyncer
}
// NewTargetManager creates a new Kafka managers.
func NewTargetManager(
reg prometheus.Registerer,
logger log.Logger,
pushClient api.EntryHandler,
scrapeConfigs []scrapeconfig.Config,
) (*TargetManager, error) {
tm := &TargetManager{
logger: logger,
targetSyncers: make(map[string]*TargetSyncer),
}
for _, cfg := range scrapeConfigs {
t, err := NewSyncer(reg, logger, cfg, pushClient)
if err != nil {
return nil, err
}
tm.targetSyncers[cfg.JobName] = t
}
return tm, nil
}
// Ready returns true if at least one Kafka target is active.
func (tm *TargetManager) Ready() bool {
for _, t := range tm.targetSyncers {
if len(t.getActiveTargets()) > 0 {
return true
}
}
return false
}
func (tm *TargetManager) Stop() {
for _, t := range tm.targetSyncers {
if err := t.Stop(); err != nil {
level.Error(t.logger).Log("msg", "error stopping kafka target", "err", err)
}
}
}
func (tm *TargetManager) ActiveTargets() map[string][]target.Target {
result := make(map[string][]target.Target, len(tm.targetSyncers))
for k, v := range tm.targetSyncers {
result[k] = v.getActiveTargets()
}
return result
}
func (tm *TargetManager) AllTargets() map[string][]target.Target {
result := make(map[string][]target.Target, len(tm.targetSyncers))
for k, v := range tm.targetSyncers {
result[k] = append(v.getActiveTargets(), v.getDroppedTargets()...)
}
return result
}