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resource.go
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/
resource.go
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package alertmanagerwiring
import (
"context"
"reflect"
"github.com/giantswarm/k8sclient/v7/pkg/k8sclient"
"github.com/giantswarm/microerror"
"github.com/giantswarm/micrologger"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/giantswarm/prometheus-meta-operator/v2/service/controller/resource/generic"
"github.com/giantswarm/prometheus-meta-operator/v2/service/key"
)
const (
Name = "alertmanagerwiring"
)
var (
alertmanagerConfig = `- static_configs:
- targets:
- alertmanager-operated.monitoring.svc:9093
scheme: http
timeout: 10s
api_version: v2
`
)
type Config struct {
K8sClient k8sclient.Interface
Logger micrologger.Logger
}
func New(config Config) (*generic.Resource, error) {
if config.K8sClient == nil {
return nil, microerror.Maskf(invalidConfigError, "%T.K8sClient must not be empty", config)
}
if config.Logger == nil {
return nil, microerror.Maskf(invalidConfigError, "%T.Logger must not be empty", config)
}
clientFunc := func(namespace string) generic.Interface {
c := config.K8sClient.K8sClient().CoreV1().Secrets(namespace)
return wrappedClient{client: c}
}
c := generic.Config{
ClientFunc: clientFunc,
Logger: config.Logger,
Name: Name,
GetObjectMeta: getObjectMeta,
GetDesiredObject: toSecret,
HasChangedFunc: hasChanged,
}
r, err := generic.New(c)
if err != nil {
return nil, microerror.Mask(err)
}
return r, nil
}
func getObjectMeta(ctx context.Context, v interface{}) (metav1.ObjectMeta, error) {
cluster, err := key.ToCluster(v)
if err != nil {
return metav1.ObjectMeta{}, microerror.Mask(err)
}
return metav1.ObjectMeta{
Name: key.AlertmanagerSecretName(),
Namespace: key.Namespace(cluster),
}, nil
}
func toData() []byte {
return []byte(alertmanagerConfig)
}
func toSecret(ctx context.Context, v interface{}) (metav1.Object, error) {
objectMeta, err := getObjectMeta(ctx, v)
if err != nil {
return nil, microerror.Mask(err)
}
secret := &corev1.Secret{
ObjectMeta: objectMeta,
Data: map[string][]byte{
key.AlertmanagerKey(): toData(),
},
}
return secret, nil
}
func hasChanged(current, desired metav1.Object) bool {
c := current.(*corev1.Secret)
d := desired.(*corev1.Secret)
return !reflect.DeepEqual(c.Data, d.Data)
}