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remove clusterauthentinfo configmap if it is too large

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This commit is contained in:
David Eads 2019-11-01 10:48:33 -04:00
parent be8af0de1b
commit e08fe4400e
1 changed files with 14 additions and 1 deletions
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15
pkg/master/controller/clusterauthenticationtrust/cluster_authentication_trust_controller.go
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@ -23,6 +23,7 @@ import (
"encoding/pem"
"fmt"
"reflect"
"strings"
"time"
corev1 "k8s.io/api/core/v1"
@ -86,7 +87,7 @@ type ClusterAuthenticationInfo struct {
RequestHeaderCA dynamiccertificates.CAContentProvider
}
// NewClusterAuthenticationTrustController returns a controller that will maintain the `kubectl get -n kube-system configmap/extension-apiserver-authentication`
// NewClusterAuthenticationTrustController returns a controller that will maintain the kube-system configmap/extension-apiserver-authentication
// that holds information about how to aggregated apiservers are recommended (but not required) to configure themselves.
func NewClusterAuthenticationTrustController(requiredAuthenticationData ClusterAuthenticationInfo, kubeClient kubernetes.Interface) *Controller {
// we construct our own informer because we need such a small subset of the information available. Just one namespace.
@ -198,6 +199,18 @@ func writeConfigMap(configMapClient corev1client.ConfigMapsGetter, required *cor
return err
}
// If the configmap is too big, clear the entire thing and count on this controller (or another one) to add the correct data back.
// We return the original error which causes the controller to re-queue.
// Too big means
// 1. request is so big the generic request catcher finds it
// 2. the content is so large that that the server sends a validation error "Too long: must have at most 1048576 characters"
if apierrors.IsRequestEntityTooLargeError(err) || (apierrors.IsInvalid(err) && strings.Contains(err.Error(), "Too long")) {
if deleteErr := configMapClient.ConfigMaps(required.Namespace).Delete(required.Name, nil); deleteErr != nil {
return deleteErr
}
return err
}
return err
}