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main.go
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main.go
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package main
import (
"context"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"github.com/kyma-project/control-plane/components/kyma-environment-broker/cmd/subscriptioncleanup/cloudprovider"
"github.com/kyma-project/control-plane/components/kyma-environment-broker/common/gardener"
"github.com/kyma-project/control-plane/components/kyma-environment-broker/cmd/subscriptioncleanup/job"
log "github.com/sirupsen/logrus"
"github.com/vrischmann/envconfig"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
type config struct {
Gardener struct {
KubeconfigPath string `envconfig:"default=/gardener/kubeconfig"`
Project string `envconfig:"default="`
}
}
func main() {
log.Info("Starting cleanup job!")
cfg := config{}
err := envconfig.InitWithPrefix(&cfg, "APP")
exitOnError(err, "Failed to load application config")
clusterConfig, err := newClusterConfig(cfg)
exitOnError(err, "Failed to create kubernetes cluster client")
kubernetesInterface, err := newKubernetesInterface(clusterConfig)
exitOnError(err, "Failed to create kubernetes client")
gardenerClient, err := dynamic.NewForConfig(clusterConfig)
exitOnError(err, "Failed to create kubernetes client")
gardenerNamespace := fmt.Sprintf("garden-%s", cfg.Gardener.Project)
shootInterface := gardenerClient.Resource(gardener.ShootResource).Namespace(gardenerNamespace)
secretBindingsInterface := gardenerClient.Resource(gardener.SecretBindingResource).Namespace(gardenerNamespace)
cleaner := job.NewCleaner(context.Background(), kubernetesInterface, secretBindingsInterface, shootInterface, cloudprovider.NewProviderFactory())
err = cleaner.Do()
HaltIstioSidecar()
exitOnError(err, "Job execution failed")
log.Info("Cleanup job finished successfully!")
}
func exitOnError(err error, context string) {
if err != nil {
log.Fatal(fmt.Errorf("%s: %s", context, err))
}
}
func HaltIstioSidecar() {
log.Info("# HALT ISTIO SIDECAR #")
resp, err := http.PostForm("http://127.0.0.1:15020/quitquitquit", url.Values{})
if err != nil {
log.Errorf("unable to send post request to quit Istio sidecar: %s", err)
return
}
if resp.StatusCode >= 200 && resp.StatusCode <= 299 {
log.Infof("Quiting istio, response status is: %d", resp.StatusCode)
return
}
}
func newClusterConfig(cfg config) (*restclient.Config, error) {
rawKubeconfig, err := ioutil.ReadFile(cfg.Gardener.KubeconfigPath)
if err != nil {
return nil, fmt.Errorf("failed to read Gardener Kubeconfig from path %s: %s",
cfg.Gardener.KubeconfigPath, err.Error())
}
gardenerClusterConfig, err := clientcmd.RESTConfigFromKubeConfig(rawKubeconfig)
if err != nil {
return nil, fmt.Errorf("failed to create Gardener cluster config: %s", err.Error())
}
return gardenerClusterConfig, nil
}
func newKubernetesInterface(kubeconfig *restclient.Config) (kubernetes.Interface, error) {
k8sCoreClientSet, err := kubernetes.NewForConfig(kubeconfig)
if err != nil {
return nil, fmt.Errorf("failed to create kubernetes client: %s", err.Error())
}
return k8sCoreClientSet, nil
}