master-controller-manager.go

/*
Copyright 2020 The Kubermatic Kubernetes Platform 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 kubermatic

import (
	"fmt"

	"github.com/kubermatic/kubermatic/api/pkg/controller/operator/common"
	operatorv1alpha1 "github.com/kubermatic/kubermatic/api/pkg/crd/operator/v1alpha1"
	"github.com/kubermatic/kubermatic/api/pkg/resources"
	"github.com/kubermatic/kubermatic/api/pkg/resources/reconciling"

	appsv1 "k8s.io/api/apps/v1"
	corev1 "k8s.io/api/core/v1"
	policyv1beta1 "k8s.io/api/policy/v1beta1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/util/intstr"
)

func masterControllerManagerPodLabels() map[string]string {
	return map[string]string{
		common.NameLabel: common.MasterControllerManagerDeploymentName,
	}
}

func MasterControllerManagerDeploymentCreator(cfg *operatorv1alpha1.KubermaticConfiguration, workerName string, versions common.Versions) reconciling.NamedDeploymentCreatorGetter {
	return func() (string, reconciling.DeploymentCreator) {
		return common.MasterControllerManagerDeploymentName, func(d *appsv1.Deployment) (*appsv1.Deployment, error) {
			d.Spec.Replicas = cfg.Spec.MasterController.Replicas
			d.Spec.Selector = &metav1.LabelSelector{
				MatchLabels: masterControllerManagerPodLabels(),
			}

			d.Spec.Template.Labels = d.Spec.Selector.MatchLabels
			d.Spec.Template.Annotations = map[string]string{
				"kubermatic/scrape":      "true",
				"kubermatic/scrape_port": "8085",
				"fluentbit.io/parser":    "json_iso",
			}

			d.Spec.Template.Spec.ServiceAccountName = serviceAccountName
			d.Spec.Template.Spec.ImagePullSecrets = []corev1.LocalObjectReference{
				{
					Name: common.DockercfgSecretName,
				},
			}

			d.Spec.Template.Spec.Volumes = []corev1.Volume{
				{
					Name: "seed-webhook-serving-cert",
					VolumeSource: corev1.VolumeSource{
						Secret: &corev1.SecretVolumeSource{
							SecretName: common.SeedWebhookServingCertSecretName,
						},
					},
				},
			}

			args := []string{
				"-logtostderr",
				"-internal-address=0.0.0.0:8085",
				"-worker-count=20",
				fmt.Sprintf("-namespace=%s", cfg.Namespace),
				fmt.Sprintf("-pprof-listen-address=%s", *cfg.Spec.MasterController.PProfEndpoint),
				fmt.Sprintf("-seed-admissionwebhook-cert-file=/opt/seed-webhook-serving-cert/%s", resources.ServingCertSecretKey),
				fmt.Sprintf("-seed-admissionwebhook-key-file=/opt/seed-webhook-serving-cert/%s", resources.ServingCertKeySecretKey),
			}

			// Only EE does support dynamic-datacenters
			if versions.KubermaticEdition.IsEE() {
				args = append(args, "-dynamic-datacenters=true")
			}

			if cfg.Spec.MasterController.DebugLog {
				args = append(args, "-v=4", "-log-debug=true")
			} else {
				args = append(args, "-v=2")
			}

			if workerName != "" {
				args = append(args, fmt.Sprintf("-worker-name=%s", workerName))
			}

			d.Spec.Template.Spec.Containers = []corev1.Container{
				{
					Name:    "controller-manager",
					Image:   cfg.Spec.MasterController.DockerRepository + ":" + versions.Kubermatic,
					Command: []string{"master-controller-manager"},
					Args:    args,
					Env:     common.ProxyEnvironmentVars(cfg),
					Ports: []corev1.ContainerPort{
						{
							Name:          "metrics",
							ContainerPort: 8085,
							Protocol:      corev1.ProtocolTCP,
						},
					},
					VolumeMounts: []corev1.VolumeMount{
						{
							Name:      "seed-webhook-serving-cert",
							MountPath: "/opt/seed-webhook-serving-cert/",
							ReadOnly:  true,
						},
					},
					Resources: cfg.Spec.MasterController.Resources,
				},
			}

			return d, nil
		}
	}
}

func MasterControllerManagerPDBCreator(cfg *operatorv1alpha1.KubermaticConfiguration) reconciling.NamedPodDisruptionBudgetCreatorGetter {
	name := "kubermatic-master-controller-manager"

	return func() (string, reconciling.PodDisruptionBudgetCreator) {
		return name, func(pdb *policyv1beta1.PodDisruptionBudget) (*policyv1beta1.PodDisruptionBudget, error) {
			min := intstr.FromInt(1)

			pdb.Spec.MinAvailable = &min
			pdb.Spec.Selector = &metav1.LabelSelector{
				MatchLabels: masterControllerManagerPodLabels(),
			}

			return pdb, nil
		}
	}
}