func (tw *baseTimeoutWriter) timeout(msg string) {
tw.mu.Lock()
defer tw.mu.Unlock()
tw.timedOut = true
// The timeout writer has not been used by the inner handler.
// We can safely timeout the HTTP request by sending by a timeout
// handler
if !tw.wroteHeader && !tw.hijacked {
tw.w.WriteHeader(http.StatusGatewayTimeout)
if msg != "" {
tw.w.Write([]byte(msg))
} else {
enc := json.NewEncoder(tw.w)
enc.Encode(errors.NewServerTimeout(api.Resource(""), "", 0))
}
} else {
// The timeout writer has been used by the inner handler. There is
// no way to timeout the HTTP request at the point. We have to shutdown
// the connection for HTTP1 or reset stream for HTTP2.
//
// Note from: Brad Fitzpatrick
// if the ServeHTTP goroutine panics, that will do the best possible thing for both
// HTTP/1 and HTTP/2. In HTTP/1, assuming you're replying with at least HTTP/1.1 and
// you've already flushed the headers so it's using HTTP chunking, it'll kill the TCP
// connection immediately without a proper 0-byte EOF chunk, so the peer will recognize
// the response as bogus. In HTTP/2 the server will just RST_STREAM the stream, leaving
// the TCP connection open, but resetting the stream to the peer so it'll have an error,
// like the HTTP/1 case.
panic(errConnKilled)
}
}
// InterpretCreateError converts a generic error on a create
// operation into the appropriate API error.
func InterpretCreateError(err error, qualifiedResource schema.GroupResource, name string) error {
switch {
case storage.IsNodeExist(err):
return errors.NewAlreadyExists(qualifiedResource, name)
case storage.IsUnreachable(err):
return errors.NewServerTimeout(qualifiedResource, "create", 2) // TODO: make configurable or handled at a higher level
default:
return err
}
}
// InterpretGetError converts a generic error on a retrieval
// operation into the appropriate API error.
func InterpretGetError(err error, qualifiedResource schema.GroupResource, name string) error {
switch {
case storage.IsNotFound(err):
return errors.NewNotFound(qualifiedResource, name)
case storage.IsUnreachable(err):
return errors.NewServerTimeout(qualifiedResource, "get", 2) // TODO: make configurable or handled at a higher level
default:
return err
}
}
// InterpretDeleteError converts a generic error on a delete
// operation into the appropriate API error.
func InterpretDeleteError(err error, qualifiedResource schema.GroupResource, name string) error {
switch {
case storage.IsNotFound(err):
return errors.NewNotFound(qualifiedResource, name)
case storage.IsUnreachable(err):
return errors.NewServerTimeout(qualifiedResource, "delete", 2) // TODO: make configurable or handled at a higher level
case storage.IsConflict(err), storage.IsNodeExist(err), storage.IsInvalidObj(err):
return errors.NewConflict(qualifiedResource, name, err)
case storage.IsInternalError(err):
return errors.NewInternalError(err)
default:
return err
}
}
func (s *serviceAccount) mountServiceAccountToken(serviceAccount *api.ServiceAccount, pod *api.Pod) error {
// Find the name of a referenced ServiceAccountToken secret we can mount
serviceAccountToken, err := s.getReferencedServiceAccountToken(serviceAccount)
if err != nil {
return fmt.Errorf("Error looking up service account token for %s/%s: %v", serviceAccount.Namespace, serviceAccount.Name, err)
}
if len(serviceAccountToken) == 0 {
// We don't have an API token to mount, so return
if s.RequireAPIToken {
// If a token is required, this is considered an error
err := errors.NewServerTimeout(schema.GroupResource{Resource: "serviceaccounts"}, "create pod", 1)
err.ErrStatus.Message = fmt.Sprintf("No API token found for service account %q, retry after the token is automatically created and added to the service account", serviceAccount.Name)
return err
}
return nil
}
// Find the volume and volume name for the ServiceAccountTokenSecret if it already exists
tokenVolumeName := ""
hasTokenVolume := false
allVolumeNames := sets.NewString()
for _, volume := range pod.Spec.Volumes {
allVolumeNames.Insert(volume.Name)
if volume.Secret != nil && volume.Secret.SecretName == serviceAccountToken {
tokenVolumeName = volume.Name
hasTokenVolume = true
break
}
}
// Determine a volume name for the ServiceAccountTokenSecret in case we need it
if len(tokenVolumeName) == 0 {
// Try naming the volume the same as the serviceAccountToken, and uniquify if needed
tokenVolumeName = serviceAccountToken
if allVolumeNames.Has(tokenVolumeName) {
tokenVolumeName = names.SimpleNameGenerator.GenerateName(fmt.Sprintf("%s-", serviceAccountToken))
}
}
// Create the prototypical VolumeMount
volumeMount := api.VolumeMount{
Name: tokenVolumeName,
ReadOnly: true,
MountPath: DefaultAPITokenMountPath,
}
// Ensure every container mounts the APISecret volume
needsTokenVolume := false
for i, container := range pod.Spec.InitContainers {
existingContainerMount := false
for _, volumeMount := range container.VolumeMounts {
// Existing mounts at the default mount path prevent mounting of the API token
if volumeMount.MountPath == DefaultAPITokenMountPath {
existingContainerMount = true
break
}
}
if !existingContainerMount {
pod.Spec.InitContainers[i].VolumeMounts = append(pod.Spec.InitContainers[i].VolumeMounts, volumeMount)
needsTokenVolume = true
}
}
for i, container := range pod.Spec.Containers {
existingContainerMount := false
for _, volumeMount := range container.VolumeMounts {
// Existing mounts at the default mount path prevent mounting of the API token
if volumeMount.MountPath == DefaultAPITokenMountPath {
existingContainerMount = true
break
}
}
if !existingContainerMount {
pod.Spec.Containers[i].VolumeMounts = append(pod.Spec.Containers[i].VolumeMounts, volumeMount)
needsTokenVolume = true
}
}
// Add the volume if a container needs it
if !hasTokenVolume && needsTokenVolume {
volume := api.Volume{
Name: tokenVolumeName,
VolumeSource: api.VolumeSource{
Secret: &api.SecretVolumeSource{
SecretName: serviceAccountToken,
},
},
}
pod.Spec.Volumes = append(pod.Spec.Volumes, volume)
}
return nil
}