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199 changes: 199 additions & 0 deletions
199
pkg/controllers/alertmanager/alertmanager_controller.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| /* | ||
| Copyright AppsCode Inc. and Contributors | ||
| 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 alertmanager | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| "go.openviz.dev/grafana-tools/pkg/detector" | ||
|
|
||
| monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1" | ||
| monitoringv1beta1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1beta1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| "k8s.io/klog/v2" | ||
| apiregistrationv1 "k8s.io/kube-aggregator/pkg/apis/apiregistration/v1" | ||
| "k8s.io/utils/ptr" | ||
| cu "kmodules.xyz/client-go/client" | ||
| meta_util "kmodules.xyz/client-go/meta" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/builder" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/handler" | ||
| "sigs.k8s.io/controller-runtime/pkg/log" | ||
| "sigs.k8s.io/controller-runtime/pkg/predicate" | ||
| "sigs.k8s.io/controller-runtime/pkg/reconcile" | ||
| ) | ||
|
|
||
| // v1alpha1.inbox.monitoring.appscode.com monitoring/inbox-agent | ||
| // Grant permission to alertmanager to call webhook | ||
|
|
||
| const ( | ||
| inboxAPIServiceGroup = "inbox.monitoring.appscode.com" | ||
| amcfgInboxAgent = "inbox-agent" | ||
| ) | ||
|
|
||
| var selfNamespace = meta_util.PodNamespace() | ||
|
|
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| var defaultPresetsLabels = map[string]string{ | ||
| "charts.x-helm.dev/is-default-preset": "true", | ||
| } | ||
|
|
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| // AlertmanagerReconciler reconciles an Alertmanager object | ||
| type AlertmanagerReconciler struct { | ||
| kc client.Client | ||
| scheme *runtime.Scheme | ||
| clusterUID string | ||
| d detector.AlertmanagerDetector | ||
| } | ||
|
|
||
| func NewReconciler(kc client.Client, clusterUID string, d detector.AlertmanagerDetector) *AlertmanagerReconciler { | ||
| return &AlertmanagerReconciler{ | ||
| kc: kc, | ||
| scheme: kc.Scheme(), | ||
| clusterUID: clusterUID, | ||
| d: d, | ||
| } | ||
| } | ||
|
|
||
| // Reconcile is part of the main kubernetes reconciliation loop which aims to | ||
| // move the current state of the cluster closer to the desired state. | ||
| // TODO(user): Modify the Reconcile function to compare the state specified by | ||
| // the Alertmanager object against the actual cluster state, and then | ||
| // perform operations to make the cluster state reflect the state specified by | ||
| // the user. | ||
| // | ||
| // For more details, check Reconcile and its Result here: | ||
| // - https://pkg.go.dev/sigs.k8s.io/[email protected]/pkg/reconcile | ||
| func (r *AlertmanagerReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { | ||
| log := log.FromContext(ctx) | ||
|
|
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| var am monitoringv1.Alertmanager | ||
| if err := r.kc.Get(ctx, req.NamespacedName, &am); err != nil { | ||
| log.Error(err, "unable to fetch Alertmanager") | ||
| // we'll ignore not-found errors, since they can't be fixed by an immediate | ||
| // requeue (we'll need to wait for a new notification), and we can get them | ||
| // on deleted requests. | ||
| return ctrl.Result{}, client.IgnoreNotFound(err) | ||
| } | ||
|
|
||
| if ready, err := r.d.Ready(); !ready { | ||
| return ctrl.Result{}, err | ||
| } | ||
|
|
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| if am.DeletionTimestamp != nil { | ||
| return ctrl.Result{}, nil | ||
| } | ||
|
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| apisvc, err := r.GetInboxAPIService(ctx) | ||
| if err != nil || apisvc == nil { | ||
| return ctrl.Result{}, err | ||
| } | ||
|
|
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| if err := r.SetupClusterForAlertmanager(ctx, &am, apisvc); err != nil { | ||
| log.Error(err, "unable to setup Alertmanager config") | ||
| return ctrl.Result{}, err | ||
| } | ||
|
|
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| return ctrl.Result{}, nil | ||
| } | ||
|
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| func (r *AlertmanagerReconciler) SetupClusterForAlertmanager(ctx context.Context, am *monitoringv1.Alertmanager, apisvc *apiregistrationv1.APIService) error { | ||
| cr := monitoringv1beta1.AlertmanagerConfig{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: amcfgInboxAgent, | ||
| Namespace: am.Namespace, | ||
| }, | ||
| } | ||
| crvt, err := cu.CreateOrPatch(ctx, r.kc, &cr, func(in client.Object, createOp bool) client.Object { | ||
| obj := in.(*monitoringv1beta1.AlertmanagerConfig) | ||
|
|
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| obj.Spec.Receivers = []monitoringv1beta1.Receiver{ | ||
| { | ||
| Name: "webhook", | ||
| WebhookConfigs: []monitoringv1beta1.WebhookConfig{ | ||
| { | ||
| SendResolved: ptr.To(true), | ||
| URL: ptr.To(fmt.Sprintf("https://%s.%s.svc:443/alerts", apisvc.Spec.Service.Name, apisvc.Spec.Service.Namespace)), | ||
| HTTPConfig: &monitoringv1beta1.HTTPConfig{ | ||
| TLSConfig: &monitoringv1.SafeTLSConfig{ | ||
| InsecureSkipVerify: ptr.To(true), | ||
| }, | ||
| }, | ||
| MaxAlerts: 0, | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| obj.Spec.Route = &monitoringv1beta1.Route{ | ||
| GroupBy: []string{"job"}, | ||
| GroupWait: "10s", | ||
| GroupInterval: "1m", | ||
| Receiver: "webhook", | ||
| RepeatInterval: "1h", | ||
| } | ||
|
|
||
| return obj | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| klog.Infof("%s AlertmanagerConfig %s", crvt, cr.Name) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (r *AlertmanagerReconciler) GetInboxAPIService(ctx context.Context) (*apiregistrationv1.APIService, error) { | ||
| var list apiregistrationv1.APIServiceList | ||
| err := r.kc.List(ctx, &list) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| for _, apisvc := range list.Items { | ||
| if apisvc.Spec.Group == inboxAPIServiceGroup { | ||
| return &apisvc, nil | ||
| } | ||
| } | ||
| return nil, nil | ||
| } | ||
|
|
||
| // SetupWithManager sets up the controller with the Manager. | ||
| func (r *AlertmanagerReconciler) SetupWithManager(mgr ctrl.Manager) error { | ||
| stateHandler := handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, a client.Object) []reconcile.Request { | ||
| var amList monitoringv1.AlertmanagerList | ||
| err := r.kc.List(ctx, &amList) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
|
|
||
| var req []reconcile.Request | ||
| for _, am := range amList.Items { | ||
| req = append(req, reconcile.Request{NamespacedName: client.ObjectKeyFromObject(&am)}) | ||
| } | ||
| return req | ||
| }) | ||
|
|
||
| return ctrl.NewControllerManagedBy(mgr). | ||
| For(&monitoringv1.Alertmanager{}). | ||
| Watches(&apiregistrationv1.APIService{}, stateHandler, builder.WithPredicates(predicate.NewPredicateFuncs(func(obj client.Object) bool { | ||
| apisvc := obj.(*apiregistrationv1.APIService) | ||
| return apisvc.Spec.Group == inboxAPIServiceGroup | ||
| }))). | ||
| Complete(r) | ||
| } |
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