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config_controller.go
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config_controller.go
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package controller
import (
"context"
"fmt"
apiv1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
log "github.com/sirupsen/logrus"
"sigs.k8s.io/yaml"
"github.com/argoproj/argo/errors"
"github.com/argoproj/argo/persist/sqldb"
"github.com/argoproj/argo/workflow/common"
"github.com/argoproj/argo/workflow/config"
)
// ResyncConfig reloads the controller config from the configmap
func (wfc *WorkflowController) ResyncConfig() error {
cmClient := wfc.kubeclientset.CoreV1().ConfigMaps(wfc.namespace)
cm, err := cmClient.Get(wfc.configMap, metav1.GetOptions{})
if err != nil {
return errors.InternalWrapError(err)
}
return wfc.updateConfig(cm)
}
func (wfc *WorkflowController) updateConfig(cm *apiv1.ConfigMap) error {
configStr, ok := cm.Data[common.WorkflowControllerConfigMapKey]
if !ok {
log.Warnf("ConfigMap '%s' does not have key '%s'", wfc.configMap, common.WorkflowControllerConfigMapKey)
configStr = ""
}
var config config.WorkflowControllerConfig
err := yaml.Unmarshal([]byte(configStr), &config)
if err != nil {
return errors.InternalWrapError(err)
}
log.Printf("workflow controller configuration from %s:\n%s", wfc.configMap, configStr)
if wfc.cliExecutorImage == "" && config.ExecutorImage == "" {
return errors.Errorf(errors.CodeBadRequest, "ConfigMap '%s' does not have executorImage", wfc.configMap)
}
wfc.Config = config
if wfc.session != nil {
err := wfc.session.Close()
if err != nil {
return err
}
}
wfc.session = nil
wfc.offloadNodeStatusRepo = sqldb.ExplosiveOffloadNodeStatusRepo
wfc.wfArchive = sqldb.NullWorkflowArchive
persistence := wfc.Config.Persistence
if persistence != nil {
log.Info("Persistence configuration enabled")
session, tableName, err := sqldb.CreateDBSession(wfc.kubeclientset, wfc.namespace, persistence)
if err != nil {
return err
}
log.Info("Persistence Session created successfully")
err = sqldb.NewMigrate(session, persistence.GetClusterName(), tableName).Exec(context.Background())
if err != nil {
return err
}
wfc.session = session
wfc.offloadNodeStatusRepo = sqldb.NewOffloadNodeStatusRepo(session, persistence.GetClusterName(), tableName)
if persistence.Archive {
wfc.wfArchive = sqldb.NewWorkflowArchive(session, persistence.GetClusterName())
log.Info("Workflow archiving is enabled")
} else {
log.Info("Workflow archiving is disabled")
}
} else {
log.Info("Persistence configuration disabled")
}
wfc.throttler.SetParallelism(config.Parallelism)
return nil
}
// executorImage returns the image to use for the workflow executor
func (wfc *WorkflowController) executorImage() string {
if wfc.cliExecutorImage != "" {
return wfc.cliExecutorImage
}
return wfc.Config.ExecutorImage
}
// executorImagePullPolicy returns the imagePullPolicy to use for the workflow executor
func (wfc *WorkflowController) executorImagePullPolicy() apiv1.PullPolicy {
if wfc.cliExecutorImagePullPolicy != "" {
return apiv1.PullPolicy(wfc.cliExecutorImagePullPolicy)
} else if wfc.Config.Executor != nil && wfc.Config.Executor.ImagePullPolicy != "" {
return wfc.Config.Executor.ImagePullPolicy
} else {
return apiv1.PullPolicy(wfc.Config.ExecutorImagePullPolicy)
}
}
func (wfc *WorkflowController) watchControllerConfigMap(ctx context.Context) (cache.Controller, error) {
source := wfc.newControllerConfigMapWatch()
_, controller := cache.NewInformer(
source,
&apiv1.ConfigMap{},
0,
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
if cm, ok := obj.(*apiv1.ConfigMap); ok {
log.Infof("Detected ConfigMap update. Updating the controller config.")
err := wfc.updateConfig(cm)
if err != nil {
log.Errorf("Update of config failed due to: %v", err)
}
}
},
UpdateFunc: func(old, new interface{}) {
oldCM := old.(*apiv1.ConfigMap)
newCM := new.(*apiv1.ConfigMap)
if oldCM.ResourceVersion == newCM.ResourceVersion {
return
}
if newCm, ok := new.(*apiv1.ConfigMap); ok {
log.Infof("Detected ConfigMap update. Updating the controller config.")
err := wfc.updateConfig(newCm)
if err != nil {
log.Errorf("Update of config failed due to: %v", err)
}
}
},
})
go controller.Run(ctx.Done())
return controller, nil
}
func (wfc *WorkflowController) newControllerConfigMapWatch() *cache.ListWatch {
c := wfc.kubeclientset.CoreV1().RESTClient()
resource := "configmaps"
name := wfc.configMap
fieldSelector := fields.ParseSelectorOrDie(fmt.Sprintf("metadata.name=%s", name))
listFunc := func(options metav1.ListOptions) (runtime.Object, error) {
options.FieldSelector = fieldSelector.String()
req := c.Get().
Namespace(wfc.namespace).
Resource(resource).
VersionedParams(&options, metav1.ParameterCodec)
return req.Do().Get()
}
watchFunc := func(options metav1.ListOptions) (watch.Interface, error) {
options.Watch = true
options.FieldSelector = fieldSelector.String()
req := c.Get().
Namespace(wfc.namespace).
Resource(resource).
VersionedParams(&options, metav1.ParameterCodec)
return req.Watch()
}
return &cache.ListWatch{ListFunc: listFunc, WatchFunc: watchFunc}
}
func ReadConfigMapValue(clientset kubernetes.Interface, namespace string, name string, key string) (string, error) {
cm, err := clientset.CoreV1().ConfigMaps(namespace).Get(name, metav1.GetOptions{})
if err != nil {
return "", err
}
value, ok := cm.Data[key]
if !ok {
return "", errors.InternalErrorf("Key %s was not found in the %s configMap.", key, name)
}
return value, nil
}
func getArtifactRepositoryRef(wfc *WorkflowController, configMapName string, key string) (*config.ArtifactRepository, error) {
configStr, err := ReadConfigMapValue(wfc.kubeclientset, wfc.namespace, configMapName, key)
if err != nil {
return nil, err
}
var config config.ArtifactRepository
err = yaml.Unmarshal([]byte(configStr), &config)
if err != nil {
return nil, errors.InternalWrapError(err)
}
return &config, nil
}