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vcap_services_builder.go
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vcap_services_builder.go
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package env
import (
"context"
"encoding/json"
"fmt"
korifiv1alpha1 "code.cloudfoundry.org/korifi/controllers/api/v1alpha1"
"code.cloudfoundry.org/korifi/controllers/controllers/shared"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const UserProvided = "user-provided"
type VCAPServicesEnvValueBuilder struct {
k8sClient client.Client
}
func NewVCAPServicesEnvValueBuilder(k8sClient client.Client) *VCAPServicesEnvValueBuilder {
return &VCAPServicesEnvValueBuilder{k8sClient: k8sClient}
}
func (b *VCAPServicesEnvValueBuilder) BuildEnvValue(ctx context.Context, cfApp *korifiv1alpha1.CFApp) (map[string]string, error) {
serviceBindings := &korifiv1alpha1.CFServiceBindingList{}
err := b.k8sClient.List(ctx, serviceBindings,
client.InNamespace(cfApp.Namespace),
client.MatchingFields{shared.IndexServiceBindingAppGUID: cfApp.Name},
)
if err != nil {
return nil, fmt.Errorf("error listing CFServiceBindings: %w", err)
}
if len(serviceBindings.Items) == 0 {
return map[string]string{"VCAP_SERVICES": "{}"}, nil
}
serviceEnvs := VCAPServices{}
for _, currentServiceBinding := range serviceBindings.Items {
// If finalizing do not append
if !currentServiceBinding.DeletionTimestamp.IsZero() {
continue
}
var serviceEnv ServiceDetails
var serviceLabel string
serviceEnv, serviceLabel, err = buildSingleServiceEnv(ctx, b.k8sClient, currentServiceBinding)
if err != nil {
return nil, err
}
serviceEnvs[serviceLabel] = append(serviceEnvs[serviceLabel], serviceEnv)
}
jsonVal, err := json.Marshal(serviceEnvs)
if err != nil {
return nil, err
}
return map[string]string{
"VCAP_SERVICES": string(jsonVal),
}, nil
}
func buildSingleServiceEnv(ctx context.Context, k8sClient client.Client, serviceBinding korifiv1alpha1.CFServiceBinding) (ServiceDetails, string, error) {
if serviceBinding.Status.Binding.Name == "" {
return ServiceDetails{}, "", fmt.Errorf("service binding secret name is empty")
}
serviceLabel := UserProvided
serviceInstance := korifiv1alpha1.CFServiceInstance{}
err := k8sClient.Get(ctx, types.NamespacedName{Namespace: serviceBinding.Namespace, Name: serviceBinding.Spec.Service.Name}, &serviceInstance)
if err != nil {
return ServiceDetails{}, "", fmt.Errorf("error fetching CFServiceInstance: %w", err)
}
secret := corev1.Secret{}
err = k8sClient.Get(ctx, types.NamespacedName{Namespace: serviceBinding.Namespace, Name: serviceBinding.Status.Binding.Name}, &secret)
if err != nil {
return ServiceDetails{}, "", fmt.Errorf("error fetching CFServiceBinding Secret: %w", err)
}
if serviceInstance.Spec.ServiceLabel != nil && *serviceInstance.Spec.ServiceLabel != "" {
serviceLabel = *serviceInstance.Spec.ServiceLabel
}
return fromServiceBinding(serviceBinding, serviceInstance, secret, serviceLabel), serviceLabel, nil
}
func fromServiceBinding(
serviceBinding korifiv1alpha1.CFServiceBinding,
serviceInstance korifiv1alpha1.CFServiceInstance,
serviceBindingSecret corev1.Secret,
serviceLabel string,
) ServiceDetails {
var serviceName string
var bindingName *string
if serviceBinding.Spec.DisplayName != nil {
serviceName = *serviceBinding.Spec.DisplayName
bindingName = serviceBinding.Spec.DisplayName
} else {
serviceName = serviceInstance.Spec.DisplayName
bindingName = nil
}
tags := serviceInstance.Spec.Tags
if tags == nil {
tags = []string{}
}
return ServiceDetails{
Label: serviceLabel,
Name: serviceName,
Tags: tags,
InstanceGUID: serviceInstance.Name,
InstanceName: serviceInstance.Spec.DisplayName,
BindingGUID: serviceBinding.Name,
BindingName: bindingName,
Credentials: mapFromSecret(serviceBindingSecret),
SyslogDrainURL: nil,
VolumeMounts: []string{},
}
}
func mapFromSecret(secret corev1.Secret) map[string]string {
convertedMap := make(map[string]string)
for k, v := range secret.Data {
convertedMap[k] = string(v)
}
return convertedMap
}