mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-06-13 10:00:56 +00:00
Adds the PruneOptions and implements the methods for this struct
This commit is contained in:
Sean Sullivan
258
cmd/kubectl/kubectlcobra/prune.go
Normal file
258
cmd/kubectl/kubectlcobra/prune.go
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@@ -0,0 +1,258 @@
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// Copyright 2019 The Kubernetes Authors.
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// SPDX-License-Identifier: Apache-2.0
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// package kubectlcobra contains cobra commands from kubectl
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package kubectlcobra
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import (
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"fmt"
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"io"
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"strings"
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"k8s.io/apimachinery/pkg/api/meta"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/cli-runtime/pkg/printers"
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"k8s.io/cli-runtime/pkg/resource"
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"k8s.io/client-go/dynamic"
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"k8s.io/kubectl/pkg/cmd/apply"
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"k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/validation"
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)
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// PruneOptions encapsulates the necessary information to
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// implement the prune functionality.
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type PruneOptions struct {
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client dynamic.Interface
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builder *resource.Builder
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mapper meta.RESTMapper
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namespace string
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// The currently applied objects (as Infos), including the
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// current grouping object. These objects are used to
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// calculate the prune set after retreiving the previous
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// grouping objects.
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currentGroupingObject *resource.Info
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// The set of retrieved grouping objects (as Infos) selected
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// by the grouping label. This set should also include the
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// current grouping object. Stored here to make testing
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// easier by manually setting the retrieved grouping infos.
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pastGroupingObjects []*resource.Info
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retrievedGroupingObjects bool
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toPrinter func(string) (printers.ResourcePrinter, error)
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out io.Writer
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validator validation.Schema
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// TODO: DeleteOptions--cascade?
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}
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// NewPruneOptions returns a struct (PruneOptions) encapsulating the necessary
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// information to run the prune. Returns an error if an error occurs
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// gathering this information.
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// TODO: Add dry-run options.
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func NewPruneOptions(f util.Factory, ao *apply.ApplyOptions) (*PruneOptions, error) {
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po := &PruneOptions{}
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var err error
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// Fields copied from ApplyOptions.
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po.namespace = ao.Namespace
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po.toPrinter = ao.ToPrinter
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po.out = ao.Out
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// Client/Builder fields from the Factory.
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po.client, err = f.DynamicClient()
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if err != nil {
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return nil, err
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}
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po.builder = f.NewBuilder()
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po.mapper, err = f.ToRESTMapper()
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if err != nil {
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return nil, err
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}
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po.validator, err = f.Validator(false)
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if err != nil {
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return nil, err
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}
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// Retrieve/store the grouping object for current apply.
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currentObjects, err := ao.GetObjects()
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if err != nil {
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return nil, err
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}
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currentGroupingObject, found := findGroupingObject(currentObjects)
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if !found {
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return nil, fmt.Errorf("Current grouping object not found during prune.")
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}
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po.currentGroupingObject = currentGroupingObject
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// Initialize past grouping objects as empty.
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po.pastGroupingObjects = []*resource.Info{}
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po.retrievedGroupingObjects = false
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return po, nil
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}
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// getPreviousGroupingObjects returns the set of grouping objects
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// that have the same label as the current grouping object. Removes
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// the current grouping object from this set. Returns an error
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// if there is a problem retrieving the grouping objects.
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func (po *PruneOptions) getPreviousGroupingObjects() ([]*resource.Info, error) {
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// Ensures the "pastGroupingObjects" is set.
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if !po.retrievedGroupingObjects {
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if err := po.retrievePreviousGroupingObjects(); err != nil {
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return nil, err
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}
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}
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// Remove the current grouping info from the previous grouping infos.
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currentInventory, err := infoToInventory(po.currentGroupingObject)
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if err != nil {
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return nil, err
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}
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pastGroupInfos := []*resource.Info{}
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for _, pastInfo := range po.pastGroupingObjects {
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pastInventory, err := infoToInventory(pastInfo)
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if err != nil {
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return nil, err
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}
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if !currentInventory.Equals(pastInventory) {
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pastGroupInfos = append(pastGroupInfos, pastInfo)
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}
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}
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return pastGroupInfos, nil
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}
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// retrievePreviousGroupingObjects requests the previous grouping objects
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// using the grouping label from the current grouping object. Sets
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// the field "pastGroupingObjects". Returns an error if the grouping
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// label doesn't exist for the current currentGroupingObject does not
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// exist or if the call to retrieve the past grouping objects fails.
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func (po *PruneOptions) retrievePreviousGroupingObjects() error {
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// Get the grouping label for this grouping object, and create
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// a label selector from it.
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if po.currentGroupingObject == nil || po.currentGroupingObject.Object == nil {
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return fmt.Errorf("Missing current grouping object.\n")
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}
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groupingLabel, err := retrieveGroupingLabel(po.currentGroupingObject.Object)
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if err != nil {
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return err
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}
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labelSelector := fmt.Sprintf("%s=%s", GroupingLabel, groupingLabel)
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retrievedGroupingInfos, err := po.builder.
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Unstructured().
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// TODO: Check if this validator is necessary.
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Schema(po.validator).
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ContinueOnError().
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NamespaceParam(po.namespace).DefaultNamespace().
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ResourceTypes("configmap").
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LabelSelectorParam(labelSelector).
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Flatten().
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Do().
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Infos()
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if err != nil {
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return err
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}
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po.pastGroupingObjects = retrievedGroupingInfos
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po.retrievedGroupingObjects = true
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return nil
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}
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// infoToInventory transforms the object represented by the passed "info"
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// into its Inventory representation. Returns error if the passed Info
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// is nil, or the Object in the Info is empty.
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func infoToInventory(info *resource.Info) (*Inventory, error) {
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if info == nil || info.Object == nil {
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return nil, fmt.Errorf("Empty resource.Info can not calculate as inventory.\n")
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}
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obj := info.Object
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gk := obj.GetObjectKind().GroupVersionKind().GroupKind()
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return createInventory(info.Namespace, info.Name, gk)
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}
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// unionPastInventory takes a set of grouping objects (infos), returning the
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// union of the objects referenced by these grouping objects as an
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// InventorySet. Returns an error if any of the passed objects are not
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// grouping objects, or if unable to retrieve the inventory from any
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// grouping object.
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func unionPastInventory(infos []*resource.Info) (*InventorySet, error) {
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inventorySet := NewInventorySet([]*Inventory{})
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for _, info := range infos {
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inv, err := retrieveInventoryFromGroupingObj([]*resource.Info{info})
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if err != nil {
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return nil, err
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}
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inventorySet.AddItems(inv)
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}
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return inventorySet, nil
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}
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// calcPruneSet returns the InventorySet representing the objects to
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// delete (prune). pastGroupInfos are the set of past applied grouping
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// objects, storing the inventory of the objects applied at the same time.
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// Calculates the prune set as:
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//
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// prune set = (prev1 U prev2 U ... U prevN) - (curr1, curr2, ..., currN)
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//
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// Returns an error if we are unable to retrieve the set of previously
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// applied objects, or if we are unable to get the currently applied objects
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// from the current grouping object.
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func (po *PruneOptions) calcPruneSet(pastGroupingInfos []*resource.Info) (*InventorySet, error) {
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pastInventory, err := unionPastInventory(pastGroupingInfos)
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if err != nil {
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return nil, err
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}
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// Current grouping object as inventory set.
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c := []*resource.Info{po.currentGroupingObject}
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currentInv, err := retrieveInventoryFromGroupingObj(c)
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if err != nil {
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return nil, err
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}
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return pastInventory.Subtract(NewInventorySet(currentInv))
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}
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// Prune deletes the set of resources which were previously applied
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// (retrieved from previous grouping objects) but omitted in
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// the current apply. Prune also delete all previous grouping
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// objects. Returns an error if there was a problem.
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func (po *PruneOptions) Prune() error {
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// Retrieve previous grouping objects, and calculate the
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// union of the previous applies as an inventory set.
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pastGroupingInfos, err := po.getPreviousGroupingObjects()
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if err != nil {
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return err
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}
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pruneSet, err := po.calcPruneSet(pastGroupingInfos)
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if err != nil {
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return err
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}
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// Delete the prune objects.
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for _, inv := range pruneSet.GetItems() {
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mapping, err := po.mapper.RESTMapping(inv.GroupKind)
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if err != nil {
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return err
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}
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err = po.client.Resource(mapping.Resource).Namespace(inv.Namespace).Delete(inv.Name, &metav1.DeleteOptions{})
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if err != nil {
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return err
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}
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fmt.Fprintf(po.out, "%s/%s deleted\n", strings.ToLower(inv.GroupKind.Kind), inv.Name)
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}
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// Delete previous grouping objects.
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for _, pastGroupInfo := range pastGroupingInfos {
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err = po.client.Resource(pastGroupInfo.Mapping.Resource).
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Namespace(pastGroupInfo.Namespace).
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Delete(pastGroupInfo.Name, &metav1.DeleteOptions{})
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if err != nil {
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return err
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}
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printer, err := po.toPrinter("deleted")
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if err != nil {
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return err
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}
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if err = printer.PrintObj(pastGroupInfo.Object, po.out); err != nil {
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return err
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}
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}
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return nil
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}
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244
cmd/kubectl/kubectlcobra/prune_test.go
Normal file
244
cmd/kubectl/kubectlcobra/prune_test.go
Normal file
@@ -0,0 +1,244 @@
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// Copyright 2019 The Kubernetes Authors.
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|
// SPDX-License-Identifier: Apache-2.0
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|
|
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|
// package kubectlcobra contains cobra commands from kubectl
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|
package kubectlcobra
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|
import (
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"testing"
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|
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/cli-runtime/pkg/resource"
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)
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var pod1Inv = &Inventory{
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Namespace: testNamespace,
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Name: pod1Name,
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GroupKind: schema.GroupKind{
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Group: "",
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Kind: "Pod",
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},
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}
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var pod2Inv = &Inventory{
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Namespace: testNamespace,
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Name: pod2Name,
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GroupKind: schema.GroupKind{
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Group: "",
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Kind: "Pod",
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},
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}
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var pod3Inv = &Inventory{
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Namespace: testNamespace,
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Name: pod3Name,
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GroupKind: schema.GroupKind{
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Group: "",
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Kind: "Pod",
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},
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}
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var groupingInv = &Inventory{
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Namespace: testNamespace,
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Name: groupingObjName,
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GroupKind: schema.GroupKind{
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Group: "",
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Kind: "ConfigMap",
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|
},
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|
}
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|
|
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|
func TestInfoToInventory(t *testing.T) {
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|
tests := map[string]struct {
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info *resource.Info
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|
expected *Inventory
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|
isError bool
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|
}{
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|
"Nil info is an error": {
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|
info: nil,
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|
expected: nil,
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isError: true,
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|
},
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"Nil info object is an error": {
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info: nilInfo,
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|
expected: nil,
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|
isError: true,
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|
},
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"Pod 1 object becomes Pod 1 inventory": {
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|
info: pod1Info,
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|
expected: pod1Inv,
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|
isError: false,
|
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|
},
|
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|
"Grouping object becomes grouping inventory": {
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|
info: copyGroupingInfo(),
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|
expected: groupingInv,
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|
isError: false,
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|
},
|
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|
}
|
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|
|
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|
for name, test := range tests {
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|
t.Run(name, func(t *testing.T) {
|
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|
actual, err := infoToInventory(test.info)
|
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|
if test.isError && err == nil {
|
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|
t.Errorf("Did not receive expected error.\n")
|
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|
}
|
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|
if !test.isError {
|
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|
if err != nil {
|
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|
t.Errorf("Receieved unexpected error: %s\n", err)
|
||||||
|
}
|
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|
if !test.expected.Equals(actual) {
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|
t.Errorf("Expected inventory (%s), got (%s)\n", test.expected, actual)
|
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|
}
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Returns a grouping object with the inventory set from
|
||||||
|
// the passed "children".
|
||||||
|
func createGroupingInfo(name string, children ...(*resource.Info)) *resource.Info {
|
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|
groupingObjCopy := groupingObj.DeepCopy()
|
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|
var groupingInfo = &resource.Info{
|
||||||
|
Namespace: testNamespace,
|
||||||
|
Name: groupingObjName,
|
||||||
|
Object: groupingObjCopy,
|
||||||
|
}
|
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|
infos := []*resource.Info{groupingInfo}
|
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|
infos = append(infos, children...)
|
||||||
|
_ = addInventoryToGroupingObj(infos)
|
||||||
|
return groupingInfo
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestUnionPastInventory(t *testing.T) {
|
||||||
|
tests := map[string]struct {
|
||||||
|
groupingInfos []*resource.Info
|
||||||
|
expected []*Inventory
|
||||||
|
}{
|
||||||
|
"Empty grouping objects = empty inventory set": {
|
||||||
|
groupingInfos: []*resource.Info{},
|
||||||
|
expected: []*Inventory{},
|
||||||
|
},
|
||||||
|
"No children in grouping object, equals no inventory": {
|
||||||
|
groupingInfos: []*resource.Info{createGroupingInfo("test-1")},
|
||||||
|
expected: []*Inventory{},
|
||||||
|
},
|
||||||
|
"Grouping object with Pod1 returns inventory with Pod1": {
|
||||||
|
groupingInfos: []*resource.Info{createGroupingInfo("test-1", pod1Info)},
|
||||||
|
expected: []*Inventory{pod1Inv},
|
||||||
|
},
|
||||||
|
"Grouping object with three pods returns inventory with three pods": {
|
||||||
|
groupingInfos: []*resource.Info{
|
||||||
|
createGroupingInfo("test-1", pod1Info, pod2Info, pod3Info),
|
||||||
|
},
|
||||||
|
expected: []*Inventory{pod1Inv, pod2Inv, pod3Inv},
|
||||||
|
},
|
||||||
|
"Two grouping objects with different pods returns inventory with both pods": {
|
||||||
|
groupingInfos: []*resource.Info{
|
||||||
|
createGroupingInfo("test-1", pod1Info),
|
||||||
|
createGroupingInfo("test-2", pod2Info),
|
||||||
|
},
|
||||||
|
expected: []*Inventory{pod1Inv, pod2Inv},
|
||||||
|
},
|
||||||
|
"Two grouping objects with overlapping pods returns set of pods": {
|
||||||
|
groupingInfos: []*resource.Info{
|
||||||
|
createGroupingInfo("test-1", pod1Info, pod2Info),
|
||||||
|
createGroupingInfo("test-2", pod2Info, pod3Info),
|
||||||
|
},
|
||||||
|
expected: []*Inventory{pod1Inv, pod2Inv, pod3Inv},
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
for name, test := range tests {
|
||||||
|
t.Run(name, func(t *testing.T) {
|
||||||
|
actual, err := unionPastInventory(test.groupingInfos)
|
||||||
|
expected := NewInventorySet(test.expected)
|
||||||
|
if err != nil {
|
||||||
|
t.Errorf("Unexpected error received: %s\n", err)
|
||||||
|
}
|
||||||
|
if !expected.Equals(actual) {
|
||||||
|
t.Errorf("Expected inventory (%s), got (%s)\n", expected, actual)
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestCalcPruneSet(t *testing.T) {
|
||||||
|
tests := map[string]struct {
|
||||||
|
past []*resource.Info
|
||||||
|
current *resource.Info
|
||||||
|
expected []*Inventory
|
||||||
|
isError bool
|
||||||
|
}{
|
||||||
|
"Object not unstructured--error": {
|
||||||
|
past: []*resource.Info{nonUnstructuredGroupingInfo},
|
||||||
|
current: &resource.Info{},
|
||||||
|
expected: []*Inventory{},
|
||||||
|
isError: true,
|
||||||
|
},
|
||||||
|
"No past group objects--no prune set": {
|
||||||
|
|
||||||
|
past: []*resource.Info{},
|
||||||
|
current: createGroupingInfo("test-1"),
|
||||||
|
expected: []*Inventory{},
|
||||||
|
isError: false,
|
||||||
|
},
|
||||||
|
"Empty past grouping object--no prune set": {
|
||||||
|
past: []*resource.Info{createGroupingInfo("test-1")},
|
||||||
|
current: createGroupingInfo("test-1"),
|
||||||
|
expected: []*Inventory{},
|
||||||
|
isError: false,
|
||||||
|
},
|
||||||
|
"Pod1 - Pod1 = empty set": {
|
||||||
|
past: []*resource.Info{
|
||||||
|
createGroupingInfo("test-1", pod1Info),
|
||||||
|
},
|
||||||
|
current: createGroupingInfo("test-1", pod1Info),
|
||||||
|
expected: []*Inventory{},
|
||||||
|
isError: false,
|
||||||
|
},
|
||||||
|
"(Pod1, Pod2) - Pod1 = Pod2": {
|
||||||
|
past: []*resource.Info{
|
||||||
|
createGroupingInfo("test-1", pod1Info, pod2Info),
|
||||||
|
},
|
||||||
|
current: createGroupingInfo("test-1", pod1Info),
|
||||||
|
expected: []*Inventory{pod2Inv},
|
||||||
|
isError: false,
|
||||||
|
},
|
||||||
|
"(Pod1, Pod2) - Pod2 = Pod1": {
|
||||||
|
past: []*resource.Info{
|
||||||
|
createGroupingInfo("test-1", pod1Info, pod2Info),
|
||||||
|
},
|
||||||
|
current: createGroupingInfo("test-1", pod2Info),
|
||||||
|
expected: []*Inventory{pod1Inv},
|
||||||
|
isError: false,
|
||||||
|
},
|
||||||
|
"(Pod1, Pod2, Pod3) - Pod2 = Pod1, Pod3": {
|
||||||
|
past: []*resource.Info{
|
||||||
|
createGroupingInfo("test-1", pod1Info, pod2Info),
|
||||||
|
createGroupingInfo("test-1", pod2Info, pod3Info),
|
||||||
|
},
|
||||||
|
current: createGroupingInfo("test-1", pod2Info),
|
||||||
|
expected: []*Inventory{pod1Inv, pod3Inv},
|
||||||
|
isError: false,
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
for name, test := range tests {
|
||||||
|
t.Run(name, func(t *testing.T) {
|
||||||
|
po := &PruneOptions{}
|
||||||
|
po.currentGroupingObject = test.current
|
||||||
|
actual, err := po.calcPruneSet(test.past)
|
||||||
|
expected := NewInventorySet(test.expected)
|
||||||
|
if test.isError && err == nil {
|
||||||
|
t.Errorf("Did not receive expected error.\n")
|
||||||
|
}
|
||||||
|
if !test.isError {
|
||||||
|
if err != nil {
|
||||||
|
t.Errorf("Unexpected error received: %s\n", err)
|
||||||
|
}
|
||||||
|
if !expected.Equals(actual) {
|
||||||
|
t.Errorf("Expected prune set (%s), got (%s)\n", expected, actual)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user