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transformer_component.go
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/
transformer_component.go
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/*
Copyright (C) 2022-2023 ApeCloud Co., Ltd
This file is part of KubeBlocks project
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package apps
import (
"fmt"
"k8s.io/apimachinery/pkg/util/sets"
"sigs.k8s.io/controller-runtime/pkg/client"
appsv1alpha1 "github.com/apecloud/kubeblocks/apis/apps/v1alpha1"
"github.com/apecloud/kubeblocks/controllers/apps/components"
"github.com/apecloud/kubeblocks/pkg/controller/builder"
"github.com/apecloud/kubeblocks/pkg/controller/graph"
"github.com/apecloud/kubeblocks/pkg/controller/model"
ictrlutil "github.com/apecloud/kubeblocks/pkg/controllerutil"
)
// ComponentTransformer transforms all components to a K8s objects DAG
type ComponentTransformer struct {
client.Client
}
var _ graph.Transformer = &ComponentTransformer{}
func (c *ComponentTransformer) Transform(ctx graph.TransformContext, dag *graph.DAG) error {
transCtx, _ := ctx.(*clusterTransformContext)
cluster := transCtx.Cluster
clusterDef := transCtx.ClusterDef
clusterVer := transCtx.ClusterVer
reqCtx := ictrlutil.RequestCtx{
Ctx: transCtx.Context,
Log: transCtx.Logger,
Recorder: transCtx.EventRecorder,
}
var err error
dags4Component := make([]*graph.DAG, 0)
if cluster.IsStatusUpdating() {
// status existed components
err = c.transform4StatusUpdate(reqCtx, clusterDef, clusterVer, cluster, &dags4Component)
} else {
// create new components or update existed components
err = c.transform4SpecUpdate(reqCtx, clusterDef, clusterVer, cluster, &dags4Component)
}
if err != nil && !ictrlutil.IsDelayedRequeueError(err) {
return err
}
for _, subDag := range dags4Component {
for _, v := range subDag.Vertices() {
node, ok := v.(*model.ObjectVertex)
if !ok {
panic("runtime error, unexpected lifecycle vertex type")
}
if node.Obj == nil {
panic("runtime error, nil vertex object")
}
}
dag.Merge(subDag)
}
return err
}
func (c *ComponentTransformer) transform4SpecUpdate(reqCtx ictrlutil.RequestCtx, clusterDef *appsv1alpha1.ClusterDefinition,
clusterVer *appsv1alpha1.ClusterVersion, cluster *appsv1alpha1.Cluster, dags *[]*graph.DAG) error {
compSpecMap := make(map[string]*appsv1alpha1.ClusterComponentSpec)
compDefMap := make(map[string]*appsv1alpha1.ClusterComponentDefinition)
for _, spec := range cluster.Spec.ComponentSpecs {
compSpecMap[spec.Name] = &spec
}
for _, compDef := range clusterDef.Spec.ComponentDefs {
compDefMap[compDef.Name] = &compDef
}
compProto := sets.KeySet(compSpecMap)
// if component spec is empty, generate the component spec from cluster template and cluster
if cluster.Spec.ComponentSpecs == nil {
compProto = sets.KeySet(compDefMap)
}
// TODO(refactor): should review that whether it is reasonable to use component status
compStatus := sets.KeySet(cluster.Status.Components)
createSet := compProto.Difference(compStatus)
updateSet := compProto.Intersection(compStatus)
deleteSet := compStatus.Difference(compProto)
for compName := range createSet {
dag := newDAGWithPlaceholder(cluster.Namespace, cluster.Name, compName)
comp, err := components.NewComponent(reqCtx, c.Client, clusterDef, clusterVer, cluster, compName, dag)
if err != nil {
return err
}
if comp == nil {
continue
}
if err := comp.Create(reqCtx, c.Client); err != nil {
return err
}
*dags = append(*dags, dag)
}
for compName := range deleteSet {
dag := newDAGWithPlaceholder(cluster.Namespace, cluster.Name, compName)
comp, err := components.NewComponent(reqCtx, c.Client, clusterDef, clusterVer, cluster, compName, dag)
if err != nil {
return err
}
if comp == nil {
continue
}
if err := comp.Delete(reqCtx, c.Client); err != nil {
return err
}
*dags = append(*dags, dag)
}
for compName := range updateSet {
dag := newDAGWithPlaceholder(cluster.Namespace, cluster.Name, compName)
comp, err := components.NewComponent(reqCtx, c.Client, clusterDef, clusterVer, cluster, compName, dag)
if err != nil {
return err
}
if err := comp.Update(reqCtx, c.Client); err != nil {
return err
}
*dags = append(*dags, dag)
}
return nil
}
func (c *ComponentTransformer) transform4StatusUpdate(reqCtx ictrlutil.RequestCtx, clusterDef *appsv1alpha1.ClusterDefinition,
clusterVer *appsv1alpha1.ClusterVersion, cluster *appsv1alpha1.Cluster, dags *[]*graph.DAG) error {
var delayedError error
for _, compSpec := range cluster.Spec.ComponentSpecs {
dag := newDAGWithPlaceholder(cluster.Namespace, cluster.Name, compSpec.Name)
comp, err := components.NewComponent(reqCtx, c.Client, clusterDef, clusterVer, cluster, compSpec.Name, dag)
if err != nil {
return err
}
if err := comp.Status(reqCtx, c.Client); err != nil {
if !ictrlutil.IsDelayedRequeueError(err) {
return err
}
if delayedError == nil {
delayedError = err
}
}
*dags = append(*dags, dag)
}
return delayedError
}
func newDAGWithPlaceholder(namespace, clusterName, compName string) *graph.DAG {
root := builder.NewReplicatedStateMachineBuilder(namespace, fmt.Sprintf("%s-%s", clusterName, compName)).GetObject()
dag := graph.NewDAG()
model.NewGraphClient(nil).Root(dag, nil, root, nil)
return dag
}