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registry_update_knative.go
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registry_update_knative.go
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package registry
import (
"fmt"
"time"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
const knativeServingNs = "knative-serving"
type KnativeServing struct {
coreClient kubernetes.Interface
}
func (r KnativeServing) IsInstalled() (bool, error) {
_, err := r.coreClient.CoreV1().Namespaces().Get(knativeServingNs, metav1.GetOptions{})
if err != nil {
if errors.IsNotFound(err) {
return false, nil
}
return false, fmt.Errorf("Getting namespace: %s", err)
}
return true, nil
}
// UpdateControllerToUseHostCAs updates Knative Serving controller to pick up host CA certificates
// (which includes registry CA certificate) so that controller can resolve image digests
// by communicating with the registry. Eventually this would not be necessary as Knative Build
// will provide image digests as part of build result.
func (r KnativeServing) UpdateControllerToUseHostCAs() error {
foundDep, err := r.coreClient.ExtensionsV1beta1().Deployments(knativeServingNs).Get("controller", metav1.GetOptions{})
if err != nil {
return fmt.Errorf("Getting deployment: %s", err)
}
sslConfig := NewSSLDirConfig()
if sslConfig.ContainsEnvVar(foundDep.Spec.Template.Spec.Containers[0].Env) {
// If deployment is already configured to use host certificates,
// force restart of deployment managed pods so that controller
// loads potentially new set of certificates during its startup.
// (https://github.com/kubernetes/kubernetes/issues/27081 and https://github.com/kubernetes/kubernetes/issues/13488)
foundDep.Spec.Template.Annotations["kwt.cppforlife.io/force-update"] = time.Now().UTC().Format(time.RFC3339Nano)
_, err = r.coreClient.ExtensionsV1beta1().Deployments(knativeServingNs).Update(foundDep)
if err != nil {
return fmt.Errorf("Updating deployment metadata to force restart: %s", err)
}
return nil
}
for i, cont := range foundDep.Spec.Template.Spec.Containers {
cont.Env = append(cont.Env, sslConfig.EnvVar())
cont.VolumeMounts = append(cont.VolumeMounts, sslConfig.VolumeMount(true))
foundDep.Spec.Template.Spec.Containers[i] = cont
}
foundDep.Spec.Template.Spec.Volumes = append(foundDep.Spec.Template.Spec.Volumes, sslConfig.Volume())
_, err = r.coreClient.ExtensionsV1beta1().Deployments(knativeServingNs).Update(foundDep)
if err != nil {
return fmt.Errorf("Updating deployment: %s", err)
}
return nil
}