/
dns_operator.go
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/
dns_operator.go
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/*
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 resources
import (
"fmt"
"github.com/kubermatic/kubermatic/api/pkg/resources"
"github.com/kubermatic/kubermatic/api/pkg/resources/apiserver"
"github.com/kubermatic/kubermatic/api/pkg/resources/reconciling"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
utilpointer "k8s.io/utils/pointer"
)
const (
openshiftDNSOperatorDeploymentName = "openshift-dns-operator"
openshiftDNSOperatorContainerName = "dns-operator"
)
var (
openshiftDNSOperatorResourceRequirements = map[string]*corev1.ResourceRequirements{
openshiftDNSOperatorContainerName: {
Requests: corev1.ResourceList{
corev1.ResourceMemory: resource.MustParse("50Mi"),
corev1.ResourceCPU: resource.MustParse("10m"),
},
Limits: corev1.ResourceList{
corev1.ResourceMemory: resource.MustParse("200Mi"),
corev1.ResourceCPU: resource.MustParse("100m"),
},
},
}
)
func OpenshiftDNSOperatorFactory(data openshiftData) reconciling.NamedDeploymentCreatorGetter {
return func() (string, reconciling.DeploymentCreator) {
return openshiftDNSOperatorDeploymentName, func(d *appsv1.Deployment) (*appsv1.Deployment, error) {
image, err := clusterDnsOperatorImage(data.Cluster().Spec.Version.String(), data.ImageRegistry(""))
if err != nil {
return nil, err
}
env, err := openshiftDNSOperatorEnv(data)
if err != nil {
return nil, err
}
env = append(env, corev1.EnvVar{
Name: "KUBECONFIG",
Value: "/etc/kubernetes/kubeconfig/kubeconfig",
})
d.Spec.Selector = &metav1.LabelSelector{
MatchLabels: resources.BaseAppLabels(openshiftDNSOperatorDeploymentName, nil),
}
d.Spec.Template.Spec.ImagePullSecrets = []corev1.LocalObjectReference{
{Name: openshiftImagePullSecretName},
}
d.Spec.Template.Spec.AutomountServiceAccountToken = utilpointer.BoolPtr(false)
// Configure user cluster DNS resolver for this pod.
d.Spec.Template.Spec.DNSPolicy, d.Spec.Template.Spec.DNSConfig, err = resources.UserClusterDNSPolicyAndConfig(data)
if err != nil {
return nil, err
}
d.Spec.Template.Spec.InitContainers = []corev1.Container{}
d.Spec.Template.Spec.Containers = []corev1.Container{{
Name: openshiftDNSOperatorContainerName,
Image: image,
Env: append(env, corev1.EnvVar{
Name: "KUBECONFIG",
Value: "/etc/kubernetes/kubeconfig/kubeconfig",
}),
Command: []string{"dns-operator"},
VolumeMounts: []corev1.VolumeMount{{
Name: resources.InternalUserClusterAdminKubeconfigSecretName,
MountPath: "/etc/kubernetes/kubeconfig",
}},
}}
err = resources.SetResourceRequirements(d.Spec.Template.Spec.Containers, openshiftDNSOperatorResourceRequirements, nil, d.Annotations)
if err != nil {
return nil, fmt.Errorf("failed to set resource requirements: %v", err)
}
d.Spec.Template.Spec.Volumes = []corev1.Volume{
{
// TODO: Properly limit this instead of just using cluster-admin
Name: resources.InternalUserClusterAdminKubeconfigSecretName,
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: resources.InternalUserClusterAdminKubeconfigSecretName,
},
},
},
}
d.Spec.Template.Labels, err = data.GetPodTemplateLabels(openshiftDNSOperatorDeploymentName, d.Spec.Template.Spec.Volumes, nil)
if err != nil {
return nil, err
}
wrappedPodSpec, err := apiserver.IsRunningWrapper(data, d.Spec.Template.Spec, sets.NewString(openshiftDNSOperatorContainerName), "DNS,operator.openshift.io/v1", "Network,config.openshift.io/v1")
if err != nil {
return nil, fmt.Errorf("failed to add apiserver.IsRunningWrapper: %v", err)
}
d.Spec.Template.Spec = *wrappedPodSpec
return d, nil
}
}
}
func openshiftDNSOperatorEnv(data openshiftData) ([]corev1.EnvVar, error) {
openshiftVersion := data.Cluster().Spec.Version.String()
cliImageValue, err := cliImage(openshiftVersion, data.ImageRegistry(""))
if err != nil {
return nil, err
}
coreDNSImageValue, err := corednsImage(openshiftVersion, data.ImageRegistry(""))
if err != nil {
return nil, err
}
return []corev1.EnvVar{
{Name: "RELEASE_VERSION", Value: openshiftVersion},
{Name: "IMAGE", Value: coreDNSImageValue},
{Name: "OPENSHIFT_CLI_IMAGE", Value: cliImageValue},
}, nil
}