forked from gardener/gardener
/
addons.go
262 lines (240 loc) · 10.2 KB
/
addons.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 hybridbotanist
import (
"fmt"
"path/filepath"
gardencorev1alpha1 "github.com/gardener/gardener/pkg/apis/core/v1alpha1"
gardenv1beta1 "github.com/gardener/gardener/pkg/apis/garden/v1beta1"
"github.com/gardener/gardener/pkg/chartrenderer"
"github.com/gardener/gardener/pkg/operation/common"
"github.com/gardener/gardener/pkg/utils"
"github.com/gardener/gardener/pkg/utils/secrets"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// generateCoreAddonsChart renders the kube-addon-manager configuration for the core addons. It will be
// stored as a Secret (as it may contain credentials) and mounted into the Pod. The configuration contains
// specially labelled Kubernetes manifests which will be created and periodically reconciled.
func (b *HybridBotanist) generateCoreAddonsChart() (*chartrenderer.RenderedChart, error) {
var (
kubeProxySecret = b.Secrets["kube-proxy"]
vpnShootSecret = b.Secrets["vpn-shoot"]
vpnTLSAuthSecret = b.Secrets["vpn-seed-tlsauth"]
global = map[string]interface{}{
"kubernetesVersion": b.Shoot.Info.Spec.Kubernetes.Version,
"podNetwork": b.Shoot.GetPodNetwork(),
}
calicoConfig = map[string]interface{}{
"cloudProvider": b.Shoot.CloudProvider,
}
coreDNSConfig = map[string]interface{}{
"service": map[string]interface{}{
"clusterDNS": common.ComputeClusterIP(b.Shoot.GetServiceNetwork(), 10),
// TODO: resolve conformance test issue before changing:
// https://github.com/kubernetes/kubernetes/blob/master/test/e2e/network/dns.go#L44
"domain": map[string]interface{}{
"clusterDomain": gardenv1beta1.DefaultDomain,
},
},
}
clusterAutoscaler = map[string]interface{}{
"enabled": b.Shoot.WantsClusterAutoscaler,
}
podsecuritypolicies = map[string]interface{}{
"allowPrivilegedContainers": *b.Shoot.Info.Spec.Kubernetes.AllowPrivilegedContainers,
}
kubeProxyConfig = map[string]interface{}{
"kubeconfig": kubeProxySecret.Data["kubeconfig"],
"kubernetesVersion": b.Shoot.Info.Spec.Kubernetes.Version,
"podAnnotations": map[string]interface{}{
"checksum/secret-kube-proxy": b.CheckSums["kube-proxy"],
},
"enableIPVS": b.Shoot.IPVSEnabled(),
}
metricsServerConfig = map[string]interface{}{
"tls": map[string]interface{}{
"caBundle": b.Secrets[gardencorev1alpha1.SecretNameCAMetricsServer].Data[secrets.DataKeyCertificateCA],
},
"secret": map[string]interface{}{
"data": b.Secrets["metrics-server"].Data,
},
}
vpnShootConfig = map[string]interface{}{
"podNetwork": b.Shoot.GetPodNetwork(),
"serviceNetwork": b.Shoot.GetServiceNetwork(),
"nodeNetwork": b.Shoot.GetNodeNetwork(),
"tlsAuth": vpnTLSAuthSecret.Data["vpn.tlsauth"],
"podAnnotations": map[string]interface{}{
"checksum/secret-vpn-shoot": b.CheckSums["vpn-shoot"],
},
}
nodeExporterConfig = map[string]interface{}{}
blackboxExporterConfig = map[string]interface{}{}
)
proxyConfig := b.Shoot.Info.Spec.Kubernetes.KubeProxy
if proxyConfig != nil {
kubeProxyConfig["featureGates"] = proxyConfig.FeatureGates
}
if openvpnDiffieHellmanSecret, ok := b.Secrets[common.GardenRoleOpenVPNDiffieHellman]; ok {
vpnShootConfig["diffieHellmanKey"] = openvpnDiffieHellmanSecret.Data["dh2048.pem"]
}
calico, err := b.InjectShootShootImages(calicoConfig, common.CalicoNodeImageName, common.CalicoCNIImageName, common.CalicoTyphaImageName, common.CalicoKubeControllersImageName)
if err != nil {
return nil, err
}
coreDNS, err := b.InjectShootShootImages(coreDNSConfig, common.CoreDNSImageName)
if err != nil {
return nil, err
}
kubeProxy, err := b.InjectShootShootImages(kubeProxyConfig, common.HyperkubeImageName, common.AlpineImageName)
if err != nil {
return nil, err
}
metricsServer, err := b.InjectShootShootImages(metricsServerConfig, common.MetricsServerImageName)
if err != nil {
return nil, err
}
vpnShoot, err := b.InjectShootShootImages(vpnShootConfig, common.VPNShootImageName)
if err != nil {
return nil, err
}
vpnShootCloudSpecific, err := b.ShootCloudBotanist.GenerateVPNShootConfig()
if err != nil {
return nil, err
}
vpnShoot = utils.MergeMaps(vpnShoot, vpnShootCloudSpecific)
nodeExporter, err := b.InjectShootShootImages(nodeExporterConfig, common.NodeExporterImageName)
if err != nil {
return nil, err
}
blackboxExporter, err := b.InjectShootShootImages(blackboxExporterConfig, common.BlackboxExporterImageName)
if err != nil {
return nil, err
}
csiPlugin, err := b.ShootCloudBotanist.GenerateCSIConfig()
if err != nil {
return nil, err
}
if _, err := b.K8sShootClient.CreateSecret(metav1.NamespaceSystem, "vpn-shoot", corev1.SecretTypeOpaque, vpnShootSecret.Data, true); err != nil {
return nil, err
}
return b.ChartApplierShoot.Render(filepath.Join(common.ChartPath, "shoot-core"), "shoot-core", metav1.NamespaceSystem, map[string]interface{}{
"global": global,
"cluster-autoscaler": clusterAutoscaler,
"podsecuritypolicies": podsecuritypolicies,
"coredns": coreDNS,
fmt.Sprintf("csi-%s", b.ShootCloudBotanist.GetCloudProviderName()): csiPlugin,
"kube-proxy": kubeProxy,
"vpn-shoot": vpnShoot,
"calico": calico,
"metrics-server": metricsServer,
"monitoring": map[string]interface{}{
"node-exporter": nodeExporter,
"blackbox-exporter": blackboxExporter,
},
})
}
// generateOptionalAddonsChart renders the kube-addon-manager chart for the optional addons. It
// will be stored as a Secret (as it may contain credentials) and mounted into the Pod. The configuration
// contains specially labelled Kubernetes manifests which will be created and periodically reconciled.
func (b *HybridBotanist) generateOptionalAddonsChart() (*chartrenderer.RenderedChart, error) {
kubeLegoConfig, err := b.Botanist.GenerateKubeLegoConfig()
if err != nil {
return nil, err
}
kube2IAMConfig, err := b.ShootCloudBotanist.GenerateKube2IAMConfig()
if err != nil {
return nil, err
}
kubernetesDashboardConfig, err := b.Botanist.GenerateKubernetesDashboardConfig()
if err != nil {
return nil, err
}
nginxIngressConfig, err := b.ShootCloudBotanist.GenerateNginxIngressConfig()
if err != nil {
return nil, err
}
if b.Shoot.NginxIngressEnabled() {
nginxIngressConfig = utils.MergeMaps(nginxIngressConfig, map[string]interface{}{
"controller": map[string]interface{}{
"service": map[string]interface{}{
"loadBalancerSourceRanges": b.Shoot.Info.Spec.Addons.NginxIngress.LoadBalancerSourceRanges,
},
},
})
if b.ShootedSeed != nil {
nginxIngressConfig = utils.MergeMaps(nginxIngressConfig, map[string]interface{}{
"controller": map[string]interface{}{
"resources": map[string]interface{}{
"limits": map[string]interface{}{
"cpu": "500m",
"memory": "1024Mi",
},
},
},
})
}
}
kubeLego, err := b.InjectShootShootImages(kubeLegoConfig, common.KubeLegoImageName)
if err != nil {
return nil, err
}
kube2IAM, err := b.InjectShootShootImages(kube2IAMConfig, common.Kube2IAMImageName)
if err != nil {
return nil, err
}
kubernetesDashboard, err := b.InjectShootShootImages(kubernetesDashboardConfig, common.KubernetesDashboardImageName)
if err != nil {
return nil, err
}
nginxIngress, err := b.InjectShootShootImages(nginxIngressConfig, common.NginxIngressControllerImageName, common.IngressDefaultBackendImageName)
if err != nil {
return nil, err
}
// From https://github.com/kubernetes/kubernetes/blob/677f740adf61f9c56d0719eacabfeae3b0787256/cluster/addons/addon-manager/README.md:
// "Addons with label addonmanager.kubernetes.io/mode=EnsureExists will be checked for existence only. Users can edit these addons as they want. In particular:"
// "* Addon will only be created/re-created with the given template file when there is no instance of the resource with that name."
// "* Addon will not be deleted when the manifest file is deleted from the $ADDON_PATH."
// --> As we used the 'addonmanager.kubernetes.io/mode=EnsureExists' label for the Heapster deployment in previous versions we have to delete it ourselves now.
// This behavior can be removed in a future release.
heapsterDeployments, err := b.K8sShootClient.ListDeployments(metav1.NamespaceSystem, metav1.ListOptions{
LabelSelector: "chart=heapster-0.1.1,origin=gardener",
})
if err != nil {
return nil, err
}
for _, deployment := range heapsterDeployments.Items {
if err := b.K8sShootClient.DeleteDeployment(metav1.NamespaceSystem, deployment.Name); err != nil && !apierrors.IsNotFound(err) {
return nil, err
}
}
return b.ChartApplierShoot.Render(filepath.Join(common.ChartPath, "shoot-addons"), "addons", metav1.NamespaceSystem, map[string]interface{}{
"kube-lego": kubeLego,
"kube2iam": kube2IAM,
"kubernetes-dashboard": kubernetesDashboard,
"nginx-ingress": nginxIngress,
})
}
// generateStorageClassesChart renders the kube-addon-manager configuration for the storage classes.
// It will be stored as a ConfigMap and mounted into the Pod. The configuration contains specially labelled
// Kubernetes manifests which will be created and periodically reconciled.
func (b *HybridBotanist) generateStorageClassesChart() (*chartrenderer.RenderedChart, error) {
config, err := b.ShootCloudBotanist.GenerateStorageClassesConfig()
if err != nil {
return nil, err
}
return b.ChartApplierShoot.Render(filepath.Join(common.ChartPath, "shoot-storageclasses"), "storageclasses", metav1.NamespaceSystem, config)
}