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resource_client.go
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/
resource_client.go
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package configmap
import (
"context"
"reflect"
"sort"
"github.com/solo-io/solo-kit/pkg/api/shared"
"github.com/solo-io/solo-kit/pkg/api/v1/clients"
"github.com/solo-io/solo-kit/pkg/api/v1/clients/common"
"github.com/solo-io/solo-kit/pkg/api/v1/clients/kube/cache"
"github.com/solo-io/solo-kit/pkg/api/v1/resources"
"github.com/solo-io/solo-kit/pkg/errors"
apiexts "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/kubernetes"
)
const annotationKey = "resource_kind"
type ResourceClient struct {
cache cache.KubeCoreCache
Kube kubernetes.Interface
common.KubeCoreResourceClient
apiexts apiexts.Interface
ownerLabel string
resourceName string
// custom logic to convert the configmap to a resource
converter ConfigMapConverter
}
func NewResourceClient(kube kubernetes.Interface, resourceType resources.Resource, kubeCache cache.KubeCoreCache, plainConfigMaps bool) (*ResourceClient, error) {
var configmapConverter ConfigMapConverter = &structConverter{}
if plainConfigMaps {
configmapConverter = &plainConverter{}
}
return NewResourceClientWithConverter(kube, resourceType, kubeCache, configmapConverter)
}
func NewResourceClientWithConverter(kube kubernetes.Interface, resourceType resources.Resource, kubeCache cache.KubeCoreCache, configMapConverter ConfigMapConverter) (*ResourceClient, error) {
return &ResourceClient{
cache: kubeCache,
Kube: kube,
KubeCoreResourceClient: common.KubeCoreResourceClient{
ResourceType: resourceType,
},
resourceName: reflect.TypeOf(resourceType).String(),
converter: configMapConverter,
}, nil
}
var _ clients.ResourceClient = &ResourceClient{}
func (rc *ResourceClient) Read(namespace, name string, opts clients.ReadOpts) (resources.Resource, error) {
if err := resources.ValidateName(name); err != nil {
return nil, errors.Wrapf(err, "validation error")
}
opts = opts.WithDefaults()
configMap, err := rc.Kube.CoreV1().ConfigMaps(namespace).Get(opts.Ctx, name, metav1.GetOptions{})
if err != nil {
if apierrors.IsNotFound(err) {
return nil, errors.NewNotExistErr(namespace, name, err)
}
return nil, errors.Wrapf(err, "reading configMap from kubernetes")
}
resource, err := rc.converter.FromKubeConfigMap(opts.Ctx, rc, configMap)
if err != nil {
return nil, err
}
if resource == nil {
return nil, errors.Errorf("configMap %v is not kind %v", name, rc.Kind())
}
return resource, nil
}
func (rc *ResourceClient) Write(resource resources.Resource, opts clients.WriteOpts) (resources.Resource, error) {
opts = opts.WithDefaults()
if err := resources.Validate(resource); err != nil {
return nil, errors.Wrapf(err, "validation error")
}
meta := resource.GetMetadata()
// mutate and return clone
clone := resources.Clone(resource)
clone.SetMetadata(meta)
configMap, err := rc.converter.ToKubeConfigMap(opts.Ctx, rc, resource)
if err != nil {
return nil, err
}
original, err := rc.Read(meta.Namespace, meta.Name, clients.ReadOpts{
Ctx: opts.Ctx,
})
if original != nil && err == nil {
if !opts.OverwriteExisting {
return nil, errors.NewExistErr(meta)
}
if meta.ResourceVersion != original.GetMetadata().ResourceVersion {
return nil, errors.NewResourceVersionErr(meta.Namespace, meta.Name, meta.ResourceVersion, original.GetMetadata().ResourceVersion)
}
if _, err := rc.Kube.CoreV1().ConfigMaps(configMap.Namespace).Update(opts.Ctx, configMap, metav1.UpdateOptions{}); err != nil {
return nil, errors.Wrapf(err, "updating kube configMap %v", configMap.Name)
}
} else {
if _, err := rc.Kube.CoreV1().ConfigMaps(configMap.Namespace).Create(opts.Ctx, configMap, metav1.CreateOptions{}); err != nil {
return nil, errors.Wrapf(err, "creating kube configMap %v", configMap.Name)
}
}
// return a read object to update the resource version
return rc.Read(configMap.Namespace, configMap.Name, clients.ReadOpts{Ctx: opts.Ctx})
}
func (rc *ResourceClient) ApplyStatus(statusClient resources.StatusClient, inputResource resources.InputResource, opts clients.ApplyStatusOpts) (resources.Resource, error) {
name := inputResource.GetMetadata().GetName()
namespace := inputResource.GetMetadata().GetNamespace()
if err := resources.ValidateName(name); err != nil {
return nil, errors.Wrapf(err, "validation error")
}
opts = opts.WithDefaults()
data, err := shared.GetJsonPatchData(opts.Ctx, inputResource)
if err != nil {
return nil, errors.Wrapf(err, "error getting status json patch data")
}
configMap, err := rc.Kube.CoreV1().ConfigMaps(namespace).Patch(opts.Ctx, name, types.JSONPatchType, data, metav1.PatchOptions{})
if err != nil {
if apierrors.IsNotFound(err) {
return nil, errors.NewNotExistErr(namespace, name, err)
}
return nil, errors.Wrapf(err, "patching configMap status from kubernetes")
}
resource, err := rc.converter.FromKubeConfigMap(opts.Ctx, rc, configMap)
if err != nil {
return nil, err
}
if resource == nil {
return nil, errors.Errorf("configMap %v is not kind %v", name, rc.Kind())
}
return resource, nil
}
func (rc *ResourceClient) Delete(namespace, name string, opts clients.DeleteOpts) error {
opts = opts.WithDefaults()
if !rc.exist(opts.Ctx, namespace, name) {
if !opts.IgnoreNotExist {
return errors.NewNotExistErr(namespace, name)
}
return nil
}
if err := rc.Kube.CoreV1().ConfigMaps(namespace).Delete(opts.Ctx, name, metav1.DeleteOptions{}); err != nil {
return errors.Wrapf(err, "deleting configMap %v", name)
}
return nil
}
func (rc *ResourceClient) List(namespace string, opts clients.ListOpts) (resources.ResourceList, error) {
opts = opts.WithDefaults()
if rc.cache.NamespacedConfigMapLister(namespace) == nil {
return nil, errors.Errorf("namespaces is not watched")
}
configMapList, err := rc.cache.NamespacedConfigMapLister(namespace).List(labels.SelectorFromSet(opts.Selector))
if err != nil {
return nil, errors.Wrapf(err, "listing configMaps in %v", namespace)
}
var resourceList resources.ResourceList
for _, configMap := range configMapList {
resource, err := rc.converter.FromKubeConfigMap(opts.Ctx, rc, configMap)
if err != nil {
return nil, err
}
if resource == nil {
continue
}
resourceList = append(resourceList, resource)
}
sort.SliceStable(resourceList, func(i, j int) bool {
return resourceList[i].GetMetadata().Name < resourceList[j].GetMetadata().Name
})
return resourceList, nil
}
func (rc *ResourceClient) Watch(namespace string, opts clients.WatchOpts) (<-chan resources.ResourceList, <-chan error, error) {
return common.KubeResourceWatch(rc.cache, rc.List, namespace, opts)
}
func (rc *ResourceClient) exist(ctx context.Context, namespace, name string) bool {
_, err := rc.Kube.CoreV1().ConfigMaps(namespace).Get(ctx, name, metav1.GetOptions{})
return err == nil
}