Rename gotk binary to flux

Signed-off-by: Hidde Beydals <hello@hidde.co>

cmd/flux/create_alert.go

@@ -0,0 +1,192 @@
+/*
+Copyright 2020 The Flux 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 main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/fluxcd/pkg/apis/meta"
+	"github.com/fluxcd/toolkit/internal/utils"
+
+	"github.com/spf13/cobra"
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	notificationv1 "github.com/fluxcd/notification-controller/api/v1beta1"
+)
+
+var createAlertCmd = &cobra.Command{
+	Use:   "alert [name]",
+	Short: "Create or update a Alert resource",
+	Long:  "The create alert command generates a Alert resource.",
+	Example: `  # Create an Alert for kustomization events
+  flux create alert \
+  --event-severity info \
+  --event-source Kustomization/flux-system \
+  --provider-ref slack \
+  flux-system
+`,
+	RunE: createAlertCmdRun,
+}
+
+var (
+	aProviderRef   string
+	aEventSeverity string
+	aEventSources  []string
+)
+
+func init() {
+	createAlertCmd.Flags().StringVar(&aProviderRef, "provider-ref", "", "reference to provider")
+	createAlertCmd.Flags().StringVar(&aEventSeverity, "event-severity", "", "severity of events to send alerts for")
+	createAlertCmd.Flags().StringArrayVar(&aEventSources, "event-source", []string{}, "sources that should generate alerts (<kind>/<name>)")
+	createCmd.AddCommand(createAlertCmd)
+}
+
+func createAlertCmdRun(cmd *cobra.Command, args []string) error {
+	if len(args) < 1 {
+		return fmt.Errorf("Alert name is required")
+	}
+	name := args[0]
+
+	if aProviderRef == "" {
+		return fmt.Errorf("provider ref is required")
+	}
+
+	eventSources := []notificationv1.CrossNamespaceObjectReference{}
+	for _, eventSource := range aEventSources {
+		kind, name := utils.ParseObjectKindName(eventSource)
+		if kind == "" {
+			return fmt.Errorf("invalid event source '%s', must be in format <kind>/<name>", eventSource)
+		}
+
+		eventSources = append(eventSources, notificationv1.CrossNamespaceObjectReference{
+			Kind: kind,
+			Name: name,
+		})
+	}
+
+	if len(eventSources) == 0 {
+		return fmt.Errorf("at least one event source is required")
+	}
+
+	sourceLabels, err := parseLabels()
+	if err != nil {
+		return err
+	}
+
+	if !export {
+		logger.Generatef("generating Alert")
+	}
+
+	alert := notificationv1.Alert{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      name,
+			Namespace: namespace,
+			Labels:    sourceLabels,
+		},
+		Spec: notificationv1.AlertSpec{
+			ProviderRef: corev1.LocalObjectReference{
+				Name: aProviderRef,
+			},
+			EventSeverity: aEventSeverity,
+			EventSources:  eventSources,
+			Suspend:       false,
+		},
+	}
+
+	if export {
+		return exportAlert(alert)
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	kubeClient, err := utils.KubeClient(kubeconfig)
+	if err != nil {
+		return err
+	}
+
+	logger.Actionf("applying Alert")
+	namespacedName, err := upsertAlert(ctx, kubeClient, &alert)
+	if err != nil {
+		return err
+	}
+
+	logger.Waitingf("waiting for Alert reconciliation")
+	if err := wait.PollImmediate(pollInterval, timeout,
+		isAlertReady(ctx, kubeClient, namespacedName, &alert)); err != nil {
+		return err
+	}
+	logger.Successf("Alert %s is ready", name)
+	return nil
+}
+
+func upsertAlert(ctx context.Context, kubeClient client.Client,
+	alert *notificationv1.Alert) (types.NamespacedName, error) {
+	namespacedName := types.NamespacedName{
+		Namespace: alert.GetNamespace(),
+		Name:      alert.GetName(),
+	}
+
+	var existing notificationv1.Alert
+	err := kubeClient.Get(ctx, namespacedName, &existing)
+	if err != nil {
+		if errors.IsNotFound(err) {
+			if err := kubeClient.Create(ctx, alert); err != nil {
+				return namespacedName, err
+			} else {
+				logger.Successf("Alert created")
+				return namespacedName, nil
+			}
+		}
+		return namespacedName, err
+	}
+
+	existing.Labels = alert.Labels
+	existing.Spec = alert.Spec
+	if err := kubeClient.Update(ctx, &existing); err != nil {
+		return namespacedName, err
+	}
+	alert = &existing
+	logger.Successf("Alert updated")
+	return namespacedName, nil
+}
+
+func isAlertReady(ctx context.Context, kubeClient client.Client,
+	namespacedName types.NamespacedName, alert *notificationv1.Alert) wait.ConditionFunc {
+	return func() (bool, error) {
+		err := kubeClient.Get(ctx, namespacedName, alert)
+		if err != nil {
+			return false, err
+		}
+
+		if c := meta.GetCondition(alert.Status.Conditions, meta.ReadyCondition); c != nil {
+			switch c.Status {
+			case corev1.ConditionTrue:
+				return true, nil
+			case corev1.ConditionFalse:
+				return false, fmt.Errorf(c.Message)
+			}
+		}
+		return false, nil
+	}
+}