volcano-ext/pkg/scheduler/capabilities/volumebinding · openFuyao/volcano-ext

Gguoqinwillupdate the k8s version to fix crd generate problem

2ec3bb57创建于 2024年7月8日历史提交

文件	最后提交记录	最后更新时间
assume_cache.go	volcano supports k8s v1.30 Signed-off-by: wangyysde <net_use@bzhy.com>	2 年前
assume_cache_test.go	The volume binding function is applicable to K8s v1.23 and earlier versions Signed-off-by: guoqin <gq411will@163.com>	2 年前
binder.go	volcano supports k8s v1.30 Signed-off-by: wangyysde <net_use@bzhy.com>	2 年前
binder_test.go	refactor: Replace reflect.DeepEqual by equality.Semantic.DeepEqual Signed-off-by: mevrin <matthieu.evrin@gmail.com>	2 年前
fake_binder.go	The volume binding function is applicable to K8s v1.23 and earlier versions Signed-off-by: guoqin <gq411will@163.com>	2 年前
readme.md	Migrate the volume binding location to avoid the dependency of the cache on the plugin. Signed-off-by: wangyang <wangyang289@huawei.com>	3 年前
scorer.go	Migrate the volume binding location to avoid the dependency of the cache on the plugin. Signed-off-by: wangyang <wangyang289@huawei.com>	3 年前
scorer_test.go	Migrate the volume binding location to avoid the dependency of the cache on the plugin. Signed-off-by: wangyang <wangyang289@huawei.com>	3 年前
test_utils.go	The volume binding function is applicable to K8s v1.23 and earlier versions Signed-off-by: guoqin <gq411will@163.com>	2 年前
volume_binding.go	volcano supports k8s v1.30 Signed-off-by: wangyysde <net_use@bzhy.com>	2 年前
volume_binding_test.go	update the k8s version to fix crd generate problem Signed-off-by: guoqinwill <guoqinwill@163.com>	2 年前

Introduction

When adapting to K8S V1.25, Volcano introduces the volumebinding package from K8S for self-maintenance. It is expected that the current package will be deleted from Volcano when adapting to K8S V1.29.

Background

Volcano encounters forward compatibility issues when adapting to K8S V1.25. Volcano can run properly in K8S V1.25, but cannot run in earlier K8S versions (for example, v1.23, v1.21). The error information is reflector.go:424] k8s.io/client-go/informers/factory.go:134: failed to list *v1.CSIStorageCapacity: the server could not find the requested resource.

Reason

The volumeBinder.csiStorageCapacityLister in the k8s.io/kubernetes/pkg/scheduler/framework/plugins/volumebinding package uses the k8s.io/client-go/listers/storage/v1beta1 interface in V1.23, and is updated to the k8s.io/client-go/listers/storage/v1 interface in V1.25. (csiStorageCapacity is officially released v1 in v1.24) In addition, the EnableCSIStorageCapacity feature switch is removed.

The volumeBinder structure is statically defined. If the external plug-in imports the volumebinding package and uses the volumeBinder structure, forward compatibility issues may occur, for example, v1.CSIStorageCapacity is not defined.

Volcano references the volumebinding package of the K8S during scheduling for PVC binding. Therefore, after the K8S V1.25 is upgraded, the V1.23 and V1.21 versions cannot run properly.

Current solution

The k8s.io/kubernetes/pkg/scheduler/framework/plugins/volumebinding package is introduced to Volcano for self-maintenance. The volumeBinder.csiStorageCapacityLister version is changed back to k8s.io/client-go/listers/storage/v1beta1 to implement compatibility processing of K8S v1.25, v1.23, and v1.21.

Future evolution

Solution 1: After the Volcano adapts to K8S V1.27, the volumeBinder.csiStorageCapacityLister interface version is upgraded from V1beta1 to V1, the self-maintained volumebinding package is deleted, and the volumebinding package in K8S is referenced again. After the upgrade, however, Only K8S V1.27 and V1.25 are compatible. Earlier versions, such as V1.23, are not compatible.

Solution 2: Add an abstract layer to volumeBinder in the volumebinding package and change the static version dependency to dynamic definition to ensure compatibility between v1beta1 and v1 interfaces.