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transform.go
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transform.go
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/*
Copyright 2022 The Tekton Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package tektonpipeline
import (
"context"
"fmt"
"sort"
mf "github.com/manifestival/manifestival"
"github.com/tektoncd/operator/pkg/apis/operator/v1alpha1"
"github.com/tektoncd/operator/pkg/reconciler/common"
"github.com/tektoncd/operator/pkg/reconciler/kubernetes/tektoninstallerset/client"
appsv1 "k8s.io/api/apps/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
apimachineryRuntime "k8s.io/apimachinery/pkg/runtime"
)
const (
// Pipelines ConfigMap
FeatureFlag = "feature-flags"
ConfigDefaults = "config-defaults"
ConfigMetrics = "config-observability"
ResolverFeatureFlag = "resolvers-feature-flags"
bundleResolverConfig = "bundleresolver-config"
clusterResolverConfig = "cluster-resolver-config"
hubResolverConfig = "hubresolver-config"
gitResolverConfig = "git-resolver-config"
leaderElectionConfig = "config-leader-election"
pipelinesControllerDeployment = "tekton-pipelines-controller"
pipelinesControllerContainer = "tekton-pipelines-controller"
)
func filterAndTransform(extension common.Extension) client.FilterAndTransform {
return func(ctx context.Context, manifest *mf.Manifest, comp v1alpha1.TektonComponent) (*mf.Manifest, error) {
pipeline := comp.(*v1alpha1.TektonPipeline)
images := common.ToLowerCaseKeys(common.ImagesFromEnv(common.PipelinesImagePrefix))
instance := comp.(*v1alpha1.TektonPipeline)
// adding extension's transformers first to run them before `extra` transformers
trns := extension.Transformers(instance)
extra := []mf.Transformer{
common.InjectOperandNameLabelOverwriteExisting(v1alpha1.OperandTektoncdPipeline),
common.AddConfigMapValues(FeatureFlag, pipeline.Spec.PipelineProperties),
common.AddConfigMapValues(ConfigDefaults, pipeline.Spec.OptionalPipelineProperties),
common.AddConfigMapValues(ConfigMetrics, pipeline.Spec.PipelineMetricsProperties),
common.AddConfigMapValues(ResolverFeatureFlag, pipeline.Spec.Resolvers),
common.DeploymentImages(images),
common.InjectLabelOnNamespace(proxyLabel),
common.AddConfiguration(pipeline.Spec.Config),
common.CopyConfigMap(bundleResolverConfig, pipeline.Spec.BundlesResolverConfig),
common.CopyConfigMap(hubResolverConfig, pipeline.Spec.HubResolverConfig),
common.CopyConfigMap(clusterResolverConfig, pipeline.Spec.ClusterResolverConfig),
common.CopyConfigMap(gitResolverConfig, pipeline.Spec.GitResolverConfig),
common.AddConfigMapValues(leaderElectionConfig, pipeline.Spec.Performance.PipelinePerformanceLeaderElectionConfig),
updatePerformanceFlagsInDeployment(pipeline),
}
trns = append(trns, extra...)
if err := common.Transform(ctx, manifest, instance, trns...); err != nil {
return &mf.Manifest{}, err
}
return manifest, nil
}
}
// updates performance flags/args into pipelines controller container
func updatePerformanceFlagsInDeployment(pipelineCR *v1alpha1.TektonPipeline) mf.Transformer {
return func(u *unstructured.Unstructured) error {
if u.GetKind() != "Deployment" || u.GetName() != pipelinesControllerDeployment {
return nil
}
// holds the flags needs to be added in the container args section
flags := map[string]interface{}{}
// convert struct to map with json tag
// so that, we can map the arguments as is
performanceSpec := pipelineCR.Spec.Performance
if err := common.StructToMap(&performanceSpec.PipelineDeploymentPerformanceArgs, &flags); err != nil {
return err
}
// if there is no flags to update, return from here
if len(flags) == 0 {
return nil
}
// convert unstructured object to deployment
dep := &appsv1.Deployment{}
err := apimachineryRuntime.DefaultUnstructuredConverter.FromUnstructured(u.Object, dep)
if err != nil {
return err
}
// include config-leader-election data into deployment pod label
// so that pods will be recreated, if there is a change in "buckets"
// NOTE: when writing this code replicas can not be handled from installersets,
// user needs to scale the deployment manually
leaderElectionConfigMapData := map[string]interface{}{}
if err = common.StructToMap(&performanceSpec.PipelinePerformanceLeaderElectionConfig, &leaderElectionConfigMapData); err != nil {
return err
}
podLabels := dep.Spec.Template.Labels
if podLabels == nil {
podLabels = map[string]string{}
}
// sort data keys in an order, to get the consistent hash value in installerset
labelKeys := getSortedKeys(leaderElectionConfigMapData)
for _, key := range labelKeys {
value := leaderElectionConfigMapData[key]
labelKey := fmt.Sprintf("%s.data.%s", leaderElectionConfig, key)
podLabels[labelKey] = fmt.Sprintf("%v", value)
}
dep.Spec.Template.Labels = podLabels
// sort flag keys in an order, to get the consistent hash value in installerset
flagKeys := getSortedKeys(flags)
// update performance arguments into target container
for containerIndex, container := range dep.Spec.Template.Spec.Containers {
if container.Name != pipelinesControllerContainer {
continue
}
for _, flagKey := range flagKeys {
// update the arg name with "-" prefix
expectedArg := fmt.Sprintf("-%s", flagKey)
argStringValue := fmt.Sprintf("%v", flags[flagKey])
argUpdated := false
for argIndex, existingArg := range container.Args {
if existingArg == expectedArg {
argValueIndex := argIndex + 1
if len(container.Args) > argValueIndex {
container.Args[argValueIndex] = argStringValue
} else {
container.Args = append(container.Args, argStringValue)
}
argUpdated = true
break
}
}
if !argUpdated {
container.Args = append(container.Args, expectedArg, argStringValue)
}
}
dep.Spec.Template.Spec.Containers[containerIndex] = container
}
// convert deployment to unstructured object
obj, err := apimachineryRuntime.DefaultUnstructuredConverter.ToUnstructured(dep)
if err != nil {
return err
}
u.SetUnstructuredContent(obj)
return nil
}
}
// sort keys in an order, to get the consistent hash value in installerset
func getSortedKeys(input map[string]interface{}) []string {
keys := []string{}
for key := range input {
keys = append(keys, key)
}
sort.Strings(keys)
return keys
}