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clusterrulegroup_controller.go
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/
clusterrulegroup_controller.go
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/*
Copyright 2019 The KubeSphere Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package alerting
import (
"context"
"github.com/go-logr/logr"
promresourcesv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
promlabels "github.com/prometheus/prometheus/model/labels"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/uuid"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
alertingv2beta1 "kubesphere.io/api/alerting/v2beta1"
)
type ClusterRuleGroupReconciler struct {
client.Client
Log logr.Logger
}
func (r *ClusterRuleGroupReconciler) Reconcile(ctx context.Context, req reconcile.Request) (reconcile.Result, error) {
var (
log = r.Log
ruleLevel = RuleLevelCluster
clusterrulegroupList = alertingv2beta1.ClusterRuleGroupList{}
promruleNamespace = PrometheusRuleNamespace
)
// get all enabled clusterrulegroups
err := r.Client.List(ctx, &clusterrulegroupList, &client.ListOptions{
LabelSelector: labels.SelectorFromSet(labels.Set{
SourceGroupResourceLabelKeyEnable: SourceGroupResourceLabelValueEnableTrue,
}),
})
if err != nil {
return reconcile.Result{}, err
}
// add rule_id label that may have been missed
var updated bool
for i := range clusterrulegroupList.Items {
g := clusterrulegroupList.Items[i]
for j := range g.Spec.Rules {
if g.Spec.Rules[j].Labels == nil {
g.Spec.Rules[j].Labels = make(map[string]string)
}
if _, ok := g.Spec.Rules[j].Labels[alertingv2beta1.RuleLabelKeyRuleId]; !ok {
g.Spec.Rules[j].Labels[alertingv2beta1.RuleLabelKeyRuleId] = string(uuid.NewUUID())
err = r.Client.Update(ctx, &g)
if err != nil {
return reconcile.Result{}, err
}
updated = true
}
}
}
if updated {
return reconcile.Result{}, nil
}
// labels added to rule.labels
enforceRuleLabels := map[string]string{
RuleLabelKeyRuleLevel: string(ruleLevel),
}
// matchers enforced to rule.expr
enforceRuleMatchers := []*promlabels.Matcher{}
// labels added to PrometheusRule.metadata.labels
promruleLabelSet := labels.Set{
PrometheusRuleResourceLabelKeyRuleLevel: string(ruleLevel),
}
enforceFuncs := createEnforceRuleFuncs(enforceRuleMatchers, enforceRuleLabels)
// make PrometheusRule Groups
rulegroups, err := makePrometheusRuleGroups(log, &clusterrulegroupList, enforceFuncs...)
if err != nil {
return reconcile.Result{}, err
}
if len(rulegroups) == 0 {
err = r.Client.DeleteAllOf(ctx, &promresourcesv1.PrometheusRule{}, &client.DeleteAllOfOptions{
ListOptions: client.ListOptions{
Namespace: promruleNamespace,
LabelSelector: labels.SelectorFromSet(promruleLabelSet),
},
})
return reconcile.Result{}, err
}
// make desired PrometheuRule resources
desired, err := makePrometheusRuleResources(rulegroups, promruleNamespace, PrometheusRulePrefixClusterLevel, promruleLabelSet, nil)
if err != nil {
return reconcile.Result{}, err
}
// get current PrometheusRules
var current promresourcesv1.PrometheusRuleList
err = r.Client.List(ctx, ¤t, &client.ListOptions{
Namespace: promruleNamespace,
LabelSelector: labels.SelectorFromSet(promruleLabelSet),
})
if err != nil {
return reconcile.Result{}, err
}
// update relevant prometheusrule resources
err = bulkUpdatePrometheusRuleResources(r.Client, ctx, current.Items, desired)
if err != nil && (apierrors.IsConflict(err) || apierrors.IsAlreadyExists(err)) {
return reconcile.Result{Requeue: true}, nil
}
return reconcile.Result{}, err
}
func (r *ClusterRuleGroupReconciler) SetupWithManager(mgr ctrl.Manager) error {
if r.Log.GetSink() == nil {
r.Log = mgr.GetLogger()
}
if r.Client == nil {
r.Client = mgr.GetClient()
}
ctr, err := controller.New("clusterrulegroup", mgr,
controller.Options{
Reconciler: r,
})
if err != nil {
return err
}
err = ctr.Watch(
&source.Kind{Type: &alertingv2beta1.ClusterRuleGroup{}},
handler.EnqueueRequestsFromMapFunc(func(o client.Object) []reconcile.Request {
return []reconcile.Request{{
NamespacedName: types.NamespacedName{
Namespace: PrometheusRuleNamespace,
},
}}
}))
return err
}