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trigger.go
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trigger.go
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// SPDX-License-Identifier: Apache-2.0
// Copyright Authors of Cilium
package policy
import (
"strings"
"sync"
"github.com/cilium/cilium/pkg/endpoint/regeneration"
"github.com/cilium/cilium/pkg/metrics"
"github.com/cilium/cilium/pkg/option"
"github.com/cilium/cilium/pkg/time"
"github.com/cilium/cilium/pkg/trigger"
)
// TriggerPolicyUpdates triggers the policy update trigger.
//
// To follow what the trigger does, see NewUpdater.
func (u *Updater) TriggerPolicyUpdates(force bool, reason string) {
if force {
log.Debugf("Artificially increasing policy revision to enforce policy recalculation")
u.repo.BumpRevision()
}
u.TriggerWithReason(reason)
}
// NewUpdater returns a new Updater instance to handle triggering policy
// updates ready for use.
func NewUpdater(r *Repository, regen regenerator) (*Updater, error) {
t, err := trigger.NewTrigger(trigger.Parameters{
Name: "policy_update",
MetricsObserver: &TriggerMetrics{},
MinInterval: option.Config.PolicyTriggerInterval,
// Triggers policy updates for every local endpoint.
// This may be called in a variety of situations: after policy changes,
// changes in agent configuration, changes in endpoint labels, and
// change of security identities.
TriggerFunc: func(reasons []string) {
log.Debug("Regenerating all endpoints")
reason := strings.Join(reasons, ", ")
regenerationMetadata := ®eneration.ExternalRegenerationMetadata{
Reason: reason,
RegenerationLevel: regeneration.RegenerateWithoutDatapath,
}
regen.RegenerateAllEndpoints(regenerationMetadata)
},
})
if err != nil {
return nil, err
}
return &Updater{
Trigger: t,
repo: r,
}, nil
}
// Updater is responsible for triggering policy updates, in order to perform
// policy recalculation.
type Updater struct {
*trigger.Trigger
repo *Repository
}
type regenerator interface {
// RegenerateAllEndpoints should trigger a regeneration of all endpoints.
RegenerateAllEndpoints(*regeneration.ExternalRegenerationMetadata) *sync.WaitGroup
}
// TriggerMetrics handles the metrics for trigger policy recalculations.
type TriggerMetrics struct{}
func (p *TriggerMetrics) QueueEvent(reason string) {
if metrics.TriggerPolicyUpdateTotal.IsEnabled() {
metrics.TriggerPolicyUpdateTotal.WithLabelValues(reason).Inc()
}
}
func (p *TriggerMetrics) PostRun(duration, latency time.Duration, folds int) {
if metrics.TriggerPolicyUpdateCallDuration.IsEnabled() {
metrics.TriggerPolicyUpdateCallDuration.WithLabelValues("duration").Observe(duration.Seconds())
metrics.TriggerPolicyUpdateCallDuration.WithLabelValues("latency").Observe(latency.Seconds())
}
if metrics.TriggerPolicyUpdateFolds.IsEnabled() {
metrics.TriggerPolicyUpdateFolds.Set(float64(folds))
}
}