platform/warm.go

/*
 * Copyright 2022 Red Hat, Inc. and/or its affiliates.
 *
 * 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 platform

import (
	"context"
	"errors"
	v08 "github.com/kiegroup/kogito-serverless-operator/api/v1alpha08"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
	ctrl "sigs.k8s.io/controller-runtime/pkg/client"
)

func NewWarmAction(reader ctrl.Reader) Action {
	return &warmAction{
		reader: reader,
	}
}

type warmAction struct {
	baseAction
	reader ctrl.Reader
}

func (action *warmAction) Name() string {
	return "warm"
}

func (action *warmAction) CanHandle(platform *v08.KogitoServerlessPlatform) bool {
	return platform.Status.Phase == v08.PlatformPhaseWarming
}

func (action *warmAction) Handle(ctx context.Context, platform *v08.KogitoServerlessPlatform) (*v08.KogitoServerlessPlatform, error) {
	// Check Kaniko warmer pod status
	pod := corev1.Pod{
		TypeMeta: metav1.TypeMeta{
			APIVersion: corev1.SchemeGroupVersion.String(),
			Kind:       "Pod",
		},
		ObjectMeta: metav1.ObjectMeta{
			Namespace: platform.Namespace,
			Name:      platform.Name + "-cache",
		},
	}

	err := action.reader.Get(ctx, types.NamespacedName{Namespace: pod.Namespace, Name: pod.Name}, &pod)
	if err != nil {
		return nil, err
	}

	switch pod.Status.Phase {
	case corev1.PodSucceeded:
		action.Logger.Info("Kaniko cache successfully warmed up")
		platform.Status.Phase = v08.PlatformPhaseCreating
		return platform, nil
	case corev1.PodFailed:
		return nil, errors.New("failed to warm up Kaniko cache")
	default:
		action.Logger.Info("Waiting for Kaniko cache to warm up...")
		// Requeue
		return nil, nil
	}
}