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meta_manager.go
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/
meta_manager.go
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package meta
import (
"errors"
corev1 "k8s.io/api/core/v1"
corelisters "k8s.io/client-go/listers/core/v1"
"github.com/anywhy/redis-operator/pkg/apis/redis/v1alpha1"
"github.com/anywhy/redis-operator/pkg/controller"
"github.com/anywhy/redis-operator/pkg/label"
"github.com/anywhy/redis-operator/pkg/manager"
)
var errPVCNotFound = errors.New("PVC is not found")
type metaManager struct {
pvcLister corelisters.PersistentVolumeClaimLister
pvcControl controller.PVCControlInterface
pvLister corelisters.PersistentVolumeLister
pvControl controller.PVControlInterface
podLister corelisters.PodLister
podControl controller.PodControlInterface
}
// NewMetaManager returns a *metaManager
func NewMetaManager(
pvcLister corelisters.PersistentVolumeClaimLister,
pvcControl controller.PVCControlInterface,
pvLister corelisters.PersistentVolumeLister,
pvControl controller.PVControlInterface,
podLister corelisters.PodLister,
podControl controller.PodControlInterface,
) manager.Manager {
return &metaManager{
pvcLister: pvcLister,
pvcControl: pvcControl,
pvLister: pvLister,
pvControl: pvControl,
podLister: podLister,
podControl: podControl,
}
}
func (mm *metaManager) Sync(rc *v1alpha1.RedisCluster) error {
ns, labels := rc.GetNamespace(), rc.GetLabels()
instanceName := labels[label.InstanceLabelKey]
l, err := label.New().Instance(instanceName).Redis().Selector()
if err != nil {
return err
}
pods, err := mm.podLister.Pods(ns).List(l)
if err != nil {
return err
}
for _, pod := range pods {
// update meta info for pvc
pvc, err := mm.resolvePVCFromPod(pod)
if err != nil {
return err
}
_, err = mm.pvcControl.UpdatePVC(rc, pvc, pod)
if err != nil {
return err
}
if pvc.Spec.VolumeName != "" {
// update meta info for pv
pv, err := mm.pvLister.Get(pvc.Spec.VolumeName)
if err != nil {
return err
}
_, err = mm.pvControl.UpdatePV(rc, pv)
if err != nil {
return err
}
}
}
return nil
}
func (mm *metaManager) resolvePVCFromPod(pod *corev1.Pod) (*corev1.PersistentVolumeClaim, error) {
var pvcName string
for _, vol := range pod.Spec.Volumes {
switch vol.Name {
case v1alpha1.RedisMemberType.String():
if vol.PersistentVolumeClaim != nil {
pvcName = vol.PersistentVolumeClaim.ClaimName
break
}
default:
continue
}
}
if len(pvcName) == 0 {
return nil, errPVCNotFound
}
pvc, err := mm.pvcLister.PersistentVolumeClaims(pod.Namespace).Get(pvcName)
if err != nil {
return nil, err
}
return pvc, nil
}
var _ manager.Manager = &metaManager{}
// FakeMetaManager meata manage fake use test
type FakeMetaManager struct {
err error
}
// NewFakeMetaManager new instance
func NewFakeMetaManager() *FakeMetaManager {
return &FakeMetaManager{}
}
// SetSyncError sync err
func (fmm *FakeMetaManager) SetSyncError(err error) {
fmm.err = err
}
// Sync sync info
func (fmm *FakeMetaManager) Sync(_ *v1alpha1.RedisCluster) error {
if fmm.err != nil {
return fmm.err
}
return nil
}