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k8sutil.go
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k8sutil.go
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// Copyright 2018 The Operator-SDK 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 k8sutil
import (
"fmt"
"os"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
intstr "k8s.io/apimachinery/pkg/util/intstr"
)
// GetWatchNamespace returns the namespace the operator should be watching for changes
func GetWatchNamespace() (string, error) {
ns, found := os.LookupEnv(WatchNamespaceEnvVar)
if !found {
return "", fmt.Errorf("%s must be set", WatchNamespaceEnvVar)
}
return ns, nil
}
// GetOperatorName return the operator name
func GetOperatorName() (string, error) {
operatorName, found := os.LookupEnv(OperatorNameEnvVar)
if !found {
return "", fmt.Errorf("%s must be set", OperatorNameEnvVar)
}
if len(operatorName) == 0 {
return "", fmt.Errorf("%s must not be empty", OperatorNameEnvVar)
}
return operatorName, nil
}
// InitOperatorService return the static service which expose operator metrics
func InitOperatorService() (*v1.Service, error) {
operatorName, err := GetOperatorName()
if err != nil {
return nil, err
}
namespace, err := GetWatchNamespace()
if err != nil {
return nil, err
}
service := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: operatorName,
Namespace: namespace,
Labels: map[string]string{"name": operatorName},
},
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
Spec: v1.ServiceSpec{
Ports: []v1.ServicePort{
{
Port: PrometheusMetricsPort,
Protocol: v1.ProtocolTCP,
TargetPort: intstr.IntOrString{
Type: intstr.String,
StrVal: PrometheusMetricsPortName,
},
Name: PrometheusMetricsPortName,
},
},
Selector: map[string]string{"name": operatorName},
},
}
return service, nil
}