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delete.go
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delete.go
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package ipam
import (
"context"
"net"
"github.com/giantswarm/microerror"
"k8s.io/apimachinery/pkg/api/meta"
"github.com/giantswarm/azure-operator/v6/pkg/locker"
)
func (r *Resource) EnsureDeleted(ctx context.Context, obj interface{}) error {
var err error
m, err := meta.Accessor(obj)
if err != nil {
return microerror.Mask(err)
}
{
r.logger.Debugf(ctx, "acquiring lock for IPAM")
err := r.locker.Lock(ctx)
if locker.IsAlreadyExists(err) {
r.logger.Debugf(ctx, "lock for IPAM is already acquired")
} else if err != nil {
return microerror.Mask(err)
} else {
r.logger.Debugf(ctx, "acquired lock for IPAM")
}
defer func() {
r.logger.Debugf(ctx, "releasing lock for IPAM")
err := r.locker.Unlock(ctx)
if locker.IsNotFound(err) {
r.logger.Debugf(ctx, "lock for IPAM is already released")
} else if err != nil {
r.logger.Errorf(ctx, err, "failed to release lock for IPAM")
} else {
r.logger.Debugf(ctx, "released lock for IPAM")
}
}()
}
// Check if subnet is still allocated.
var subnet *net.IPNet
{
r.logger.Debugf(ctx, "finding if subnet is still allocated")
subnet, err = r.checker.Check(ctx, m.GetNamespace(), m.GetName())
if err != nil {
return microerror.Mask(err)
}
if subnet == nil {
r.logger.Debugf(ctx, "did not find allocated subnet")
return nil
}
r.logger.Debugf(ctx, "found allocated subnet")
r.logger.Debugf(ctx, "releasing allocated subnet")
// Release allocated subnet.
err = r.releaser.Release(ctx, *subnet, m.GetNamespace(), m.GetName())
if err != nil {
return microerror.Mask(err)
}
r.logger.Debugf(ctx, "released allocated subnet")
}
return nil
}