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manager.go
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manager.go
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package npls
import (
"emperror.dev/errors"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/rest"
"github.com/banzaicloud/nodepool-labels-operator/pkg/apis/nodepoollabelset/v1alpha1"
clientset "github.com/banzaicloud/nodepool-labels-operator/pkg/client/clientset/versioned"
)
type LabelSet map[string]string
type NodepoolLabelSets map[string]LabelSet
type Manager struct {
namespace string
clientset clientset.Interface
}
func NewManager(client clientset.Interface, namespace string) *Manager {
return &Manager{
namespace: namespace,
clientset: client,
}
}
func NewNPLSManager(k8sConfig *rest.Config, namespace string) (*Manager, error) {
clientset, err := clientset.NewForConfig(k8sConfig)
if err != nil {
return nil, errors.WrapIf(err, "could not get k8s npls clientset")
}
return &Manager{
namespace: namespace,
clientset: clientset,
}, nil
}
func (m *Manager) Get(name string) (LabelSet, error) {
npls, err := m.clientset.LabelsV1alpha1().NodePoolLabelSets(m.namespace).Get(name, v1.GetOptions{})
if err != nil {
return nil, errors.WrapIfWithDetails(err, "could not get npls", "name", name)
}
return LabelSet(npls.Spec.Labels), nil
}
func (m *Manager) GetAll() (NodepoolLabelSets, error) {
nplss, err := m.clientset.LabelsV1alpha1().NodePoolLabelSets(m.namespace).List(v1.ListOptions{})
if err != nil {
return nil, errors.WrapIf(err, "could not list npls resources")
}
sets := make(NodepoolLabelSets)
for _, npls := range nplss.Items {
sets[npls.Name] = LabelSet(npls.Spec.Labels)
}
return sets, nil
}
func (m *Manager) Sync(sets NodepoolLabelSets) error {
errs := make([]error, 0, len(sets))
for poolName, labelSet := range sets {
if len(labelSet) == 0 {
err := m.Delete(poolName)
if err != nil {
errs = append(errs, err)
}
continue
}
err := m.UpdateOrCreate(poolName, labelSet)
if err != nil {
errs = append(errs, err)
}
}
return errors.Combine(errs...)
}
func (m *Manager) UpdateOrCreate(name string, labelSet LabelSet) error {
err := m.Update(name, labelSet)
if err != nil && k8serrors.IsNotFound(errors.Cause(err)) {
err = m.Create(name, labelSet)
if err != nil {
return err
}
} else if err != nil {
return err
}
return nil
}
func (m *Manager) Update(name string, labelSet LabelSet) error {
npls, err := m.clientset.LabelsV1alpha1().NodePoolLabelSets(m.namespace).Get(name, v1.GetOptions{})
if err != nil {
return errors.WrapIfWithDetails(err, "could not get npls", "name", name)
}
npls.Spec.Labels = labelSet
_, err = m.clientset.LabelsV1alpha1().NodePoolLabelSets(m.namespace).Update(npls)
if err != nil {
return errors.WrapIfWithDetails(err, "could not update npls", "name", name)
}
return nil
}
func (m *Manager) Delete(name string) error {
err := m.clientset.LabelsV1alpha1().NodePoolLabelSets(m.namespace).Delete(name, &v1.DeleteOptions{})
if k8serrors.IsNotFound(err) {
return nil
}
if err != nil {
return errors.WrapIfWithDetails(err, "could not delete npls", "name", name)
}
return nil
}
func (m *Manager) Create(name string, labelSet LabelSet) error {
_, err := m.clientset.LabelsV1alpha1().NodePoolLabelSets(m.namespace).Create(
&v1alpha1.NodePoolLabelSet{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: m.namespace,
},
Spec: v1alpha1.NodePoolLabelSetSpec{
Labels: labelSet,
},
},
)
if err != nil {
return errors.WrapIfWithDetails(err, "could not create npls", "name", name)
}
return nil
}