mirror of https://github.com/k3s-io/k3s
Delete GC dump
Darren Shepherd
parent
eb8aa7d838
commit
972c1f45d2
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@ -362,7 +362,7 @@ func startGarbageCollectorController(ctx ControllerContext) (http.Handler, bool,
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// the garbage collector.
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go garbageCollector.Sync(gcClientset.Discovery(), 30*time.Second, ctx.Stop)
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return garbagecollector.NewDebugHandler(garbageCollector), true, nil
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return nil, true, nil
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}
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func startPVCProtectionController(ctx ControllerContext) (http.Handler, bool, error) {
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@ -1,278 +0,0 @@
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/*
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Copyright 2018 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 garbagecollector
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import (
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"fmt"
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"net/http"
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"strings"
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"gonum.org/v1/gonum/graph"
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"gonum.org/v1/gonum/graph/encoding"
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"gonum.org/v1/gonum/graph/encoding/dot"
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"gonum.org/v1/gonum/graph/simple"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/types"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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)
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type gonumVertex struct {
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uid types.UID
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gvk schema.GroupVersionKind
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namespace string
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name string
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missingFromGraph bool
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beingDeleted bool
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deletingDependents bool
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virtual bool
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vertexID int64
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}
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func (v *gonumVertex) ID() int64 {
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return v.vertexID
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}
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func (v *gonumVertex) String() string {
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kind := v.gvk.Kind + "." + v.gvk.Version
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if len(v.gvk.Group) > 0 {
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kind = kind + "." + v.gvk.Group
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}
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missing := ""
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if v.missingFromGraph {
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missing = "(missing)"
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}
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deleting := ""
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if v.beingDeleted {
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deleting = "(deleting)"
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}
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deletingDependents := ""
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if v.deletingDependents {
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deleting = "(deletingDependents)"
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}
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virtual := ""
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if v.virtual {
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virtual = "(virtual)"
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}
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return fmt.Sprintf(`%s/%s[%s]-%v%s%s%s%s`, kind, v.name, v.namespace, v.uid, missing, deleting, deletingDependents, virtual)
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}
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func (v *gonumVertex) Attributes() []encoding.Attribute {
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kubectlString := v.gvk.Kind + "." + v.gvk.Version
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if len(v.gvk.Group) > 0 {
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kubectlString = kubectlString + "." + v.gvk.Group
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}
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kubectlString = kubectlString + "/" + v.name
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label := fmt.Sprintf(`uid=%v
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namespace=%v
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%v
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`,
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v.uid,
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v.namespace,
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kubectlString,
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)
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conditionStrings := []string{}
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if v.beingDeleted {
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conditionStrings = append(conditionStrings, "beingDeleted")
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}
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if v.deletingDependents {
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conditionStrings = append(conditionStrings, "deletingDependents")
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}
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if v.virtual {
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conditionStrings = append(conditionStrings, "virtual")
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}
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if v.missingFromGraph {
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conditionStrings = append(conditionStrings, "missingFromGraph")
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}
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conditionString := strings.Join(conditionStrings, ",")
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if len(conditionString) > 0 {
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label = label + conditionString + "\n"
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}
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return []encoding.Attribute{
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{Key: "label", Value: fmt.Sprintf(`"%v"`, label)},
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// these place metadata in the correct location, but don't conform to any normal attribute for rendering
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{Key: "group", Value: fmt.Sprintf(`"%v"`, v.gvk.Group)},
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{Key: "version", Value: fmt.Sprintf(`"%v"`, v.gvk.Version)},
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{Key: "kind", Value: fmt.Sprintf(`"%v"`, v.gvk.Kind)},
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{Key: "namespace", Value: fmt.Sprintf(`"%v"`, v.namespace)},
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{Key: "name", Value: fmt.Sprintf(`"%v"`, v.name)},
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{Key: "uid", Value: fmt.Sprintf(`"%v"`, v.uid)},
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{Key: "missing", Value: fmt.Sprintf(`"%v"`, v.missingFromGraph)},
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{Key: "beingDeleted", Value: fmt.Sprintf(`"%v"`, v.beingDeleted)},
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{Key: "deletingDependents", Value: fmt.Sprintf(`"%v"`, v.deletingDependents)},
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{Key: "virtual", Value: fmt.Sprintf(`"%v"`, v.virtual)},
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}
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}
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func NewGonumVertex(node *node, nodeID int64) *gonumVertex {
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gv, err := schema.ParseGroupVersion(node.identity.APIVersion)
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if err != nil {
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// this indicates a bad data serialization that should be prevented during storage of the API
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utilruntime.HandleError(err)
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}
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return &gonumVertex{
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uid: node.identity.UID,
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gvk: gv.WithKind(node.identity.Kind),
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namespace: node.identity.Namespace,
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name: node.identity.Name,
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beingDeleted: node.beingDeleted,
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deletingDependents: node.deletingDependents,
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virtual: node.virtual,
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vertexID: nodeID,
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}
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}
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func NewMissingGonumVertex(ownerRef metav1.OwnerReference, nodeID int64) *gonumVertex {
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gv, err := schema.ParseGroupVersion(ownerRef.APIVersion)
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if err != nil {
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// this indicates a bad data serialization that should be prevented during storage of the API
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utilruntime.HandleError(err)
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}
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return &gonumVertex{
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uid: ownerRef.UID,
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gvk: gv.WithKind(ownerRef.Kind),
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name: ownerRef.Name,
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missingFromGraph: true,
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vertexID: nodeID,
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}
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}
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func (m *concurrentUIDToNode) ToGonumGraph() graph.Directed {
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m.uidToNodeLock.Lock()
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defer m.uidToNodeLock.Unlock()
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return toGonumGraph(m.uidToNode)
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}
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func toGonumGraph(uidToNode map[types.UID]*node) graph.Directed {
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uidToVertex := map[types.UID]*gonumVertex{}
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graphBuilder := simple.NewDirectedGraph()
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// add the vertices first, then edges. That avoids having to deal with missing refs.
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for _, node := range uidToNode {
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// skip adding objects that don't have owner references and aren't referred to.
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if len(node.dependents) == 0 && len(node.owners) == 0 {
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continue
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}
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vertex := NewGonumVertex(node, graphBuilder.NewNode().ID())
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uidToVertex[node.identity.UID] = vertex
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graphBuilder.AddNode(vertex)
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}
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for _, node := range uidToNode {
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currVertex := uidToVertex[node.identity.UID]
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for _, ownerRef := range node.owners {
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currOwnerVertex, ok := uidToVertex[ownerRef.UID]
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if !ok {
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currOwnerVertex = NewMissingGonumVertex(ownerRef, graphBuilder.NewNode().ID())
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uidToVertex[node.identity.UID] = currOwnerVertex
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graphBuilder.AddNode(currOwnerVertex)
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}
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graphBuilder.SetEdge(simple.Edge{
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F: currVertex,
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T: currOwnerVertex,
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})
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}
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}
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return graphBuilder
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}
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func (m *concurrentUIDToNode) ToGonumGraphForObj(uids ...types.UID) graph.Directed {
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m.uidToNodeLock.Lock()
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defer m.uidToNodeLock.Unlock()
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return toGonumGraphForObj(m.uidToNode, uids...)
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}
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func toGonumGraphForObj(uidToNode map[types.UID]*node, uids ...types.UID) graph.Directed {
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uidsToCheck := append([]types.UID{}, uids...)
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interestingNodes := map[types.UID]*node{}
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// build the set of nodes to inspect first, then use the normal construction on the subset
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for i := 0; i < len(uidsToCheck); i++ {
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uid := uidsToCheck[i]
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// if we've already been observed, there was a bug, but skip it so we don't loop forever
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if _, ok := interestingNodes[uid]; ok {
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continue
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}
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node, ok := uidToNode[uid]
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// if there is no node for the UID, skip over it. We may add it to the list multiple times
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// but we won't loop forever and hopefully the condition doesn't happen very often
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if !ok {
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continue
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}
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interestingNodes[node.identity.UID] = node
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for _, ownerRef := range node.owners {
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// if we've already inspected this UID, don't add it to be inspected again
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if _, ok := interestingNodes[ownerRef.UID]; ok {
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continue
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}
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uidsToCheck = append(uidsToCheck, ownerRef.UID)
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}
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for dependent := range node.dependents {
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// if we've already inspected this UID, don't add it to be inspected again
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if _, ok := interestingNodes[dependent.identity.UID]; ok {
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continue
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}
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uidsToCheck = append(uidsToCheck, dependent.identity.UID)
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}
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}
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return toGonumGraph(interestingNodes)
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}
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func NewDebugHandler(controller *GarbageCollector) http.Handler {
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return &debugHTTPHandler{controller: controller}
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}
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type debugHTTPHandler struct {
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controller *GarbageCollector
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}
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func (h *debugHTTPHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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if req.URL.Path != "/graph" {
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http.Error(w, "", http.StatusNotFound)
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return
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}
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var graph graph.Directed
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if uidStrings := req.URL.Query()["uid"]; len(uidStrings) > 0 {
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uids := []types.UID{}
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for _, uidString := range uidStrings {
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uids = append(uids, types.UID(uidString))
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}
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graph = h.controller.dependencyGraphBuilder.uidToNode.ToGonumGraphForObj(uids...)
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} else {
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graph = h.controller.dependencyGraphBuilder.uidToNode.ToGonumGraph()
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}
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data, err := dot.Marshal(graph, "full", "", " ", false)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Write(data)
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w.WriteHeader(http.StatusOK)
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}
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