mirror of
https://github.com/hanzoai/volume.git
synced 2026-10-30 14:55:30 +00:00
zeekay
b61441f7d7
A fork of Rancher's local-path-provisioner at v0.0.36. The behaviour is unchanged and deliberately so — a directory on the node a pod lands on is the right thing for a disk. What changes is identity. The provisioner answers to hanzo.ai/volume rather than rancher.io/local-path. That is not branding: two provisioners sharing one name race for the same claims, and a stock k3s carries the upstream one, so a cluster running both would settle our storage by chance. Data lives at /var/lib/hanzo/volume, so reading a Hanzo cluster does not mean learning another vendor's directory. Apache-2.0 as published, unaltered, with Rancher's attribution in NOTICE. The README says what this is not: durability. A volume here dies with its node. That is hanzoai/replicate's question, one layer up, and keeping the two apart is what lets the disk stay this simple.
90 lines
3.3 KiB
Go
90 lines
3.3 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package internal
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import (
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"fmt"
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"math/rand"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/runtime"
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)
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type skipNonAppliedManager struct {
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fieldManager Manager
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objectCreater runtime.ObjectCreater
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beforeApplyManagerName string
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probability float32
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}
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var _ Manager = &skipNonAppliedManager{}
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// NewSkipNonAppliedManager creates a new wrapped FieldManager that only starts tracking managers after the first apply.
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func NewSkipNonAppliedManager(fieldManager Manager, objectCreater runtime.ObjectCreater) Manager {
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return NewProbabilisticSkipNonAppliedManager(fieldManager, objectCreater, 0.0)
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}
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// NewProbabilisticSkipNonAppliedManager creates a new wrapped FieldManager that starts tracking managers after the first apply,
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// or starts tracking on create with p probability.
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func NewProbabilisticSkipNonAppliedManager(fieldManager Manager, objectCreater runtime.ObjectCreater, p float32) Manager {
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return &skipNonAppliedManager{
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fieldManager: fieldManager,
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objectCreater: objectCreater,
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beforeApplyManagerName: "before-first-apply",
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probability: p,
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}
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}
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// Update implements Manager.
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func (f *skipNonAppliedManager) Update(liveObj, newObj runtime.Object, managed Managed, manager string) (runtime.Object, Managed, error) {
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accessor, err := meta.Accessor(liveObj)
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if err != nil {
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return newObj, managed, nil
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}
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// If managed fields is empty, we need to determine whether to skip tracking managed fields.
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if len(managed.Fields()) == 0 {
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// Check if the operation is a create, by checking whether lastObj's UID is empty.
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// If the operation is create, P(tracking managed fields) = f.probability
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// If the operation is update, skip tracking managed fields, since we already know managed fields is empty.
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if len(accessor.GetUID()) == 0 {
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if f.probability <= rand.Float32() {
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return newObj, managed, nil
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}
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} else {
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return newObj, managed, nil
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}
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}
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return f.fieldManager.Update(liveObj, newObj, managed, manager)
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}
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// Apply implements Manager.
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func (f *skipNonAppliedManager) Apply(liveObj, appliedObj runtime.Object, managed Managed, fieldManager string, force bool) (runtime.Object, Managed, error) {
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if len(managed.Fields()) == 0 {
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gvk := appliedObj.GetObjectKind().GroupVersionKind()
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emptyObj, err := f.objectCreater.New(gvk)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to create empty object of type %v: %v", gvk, err)
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}
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liveObj, managed, err = f.fieldManager.Update(emptyObj, liveObj, managed, f.beforeApplyManagerName)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to create manager for existing fields: %v", err)
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}
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}
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return f.fieldManager.Apply(liveObj, appliedObj, managed, fieldManager, force)
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}
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