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Have the service account controller force retry

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Service account controller, when API token not found, now sends 500 with
Retry-After: 1s. Also change the apiserver to actually write the error.
This commit is contained in:
Clayton Coleman 2016-05-05 17:28:54 -04:00
parent e5fbf86157
commit 88b39cadf8
No known key found for this signature in database
GPG Key ID: 3D16906B4F1C5CB3
4 changed files with 40 additions and 5 deletions
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6
pkg/apiserver/apiserver.go
View File

@ -26,6 +26,7 @@ import (
"net/http"
"path"
rt "runtime"
"strconv"
"strings"
"time"
@ -449,6 +450,11 @@ func writeNegotiated(s runtime.NegotiatedSerializer, gv unversioned.GroupVersion
func errorNegotiated(err error, s runtime.NegotiatedSerializer, gv unversioned.GroupVersion, w http.ResponseWriter, req *http.Request) int {
status := errToAPIStatus(err)
code := int(status.Code)
// when writing an error, check to see if the status indicates a retry after period
if status.Details != nil && status.Details.RetryAfterSeconds > 0 {
delay := strconv.Itoa(int(status.Details.RetryAfterSeconds))
w.Header().Set("Retry-After", delay)
}
writeNegotiated(s, gv, w, req, code, status)
return code
}

25
pkg/apiserver/apiserver_test.go
View File

@ -1562,6 +1562,7 @@ func TestGetNamespaceSelfLink(t *testing.T) {
t.Errorf("Never set self link")
}
}
func TestGetMissing(t *testing.T) {
storage := map[string]rest.Storage{}
simpleStorage := SimpleRESTStorage{
@ -1572,7 +1573,7 @@ func TestGetMissing(t *testing.T) {
server := httptest.NewServer(handler)
defer server.Close()
resp, err := http.Get(server.URL + "/" + prefix + "/" + testGroupVersion.Group + "/" + testGroupVersion.Version + "/simple/id")
resp, err := http.Get(server.URL + "/" + prefix + "/" + testGroupVersion.Group + "/" + testGroupVersion.Version + "/namespaces/default/simple/id")
if err != nil {
t.Errorf("unexpected error: %v", err)
}
@ -1582,6 +1583,28 @@ func TestGetMissing(t *testing.T) {
}
}
func TestGetRetryAfter(t *testing.T) {
storage := map[string]rest.Storage{}
simpleStorage := SimpleRESTStorage{
errors: map[string]error{"get": apierrs.NewServerTimeout(api.Resource("simples"), "id", 2)},
}
storage["simple"] = &simpleStorage
handler := handle(storage)
server := httptest.NewServer(handler)
defer server.Close()
resp, err := http.Get(server.URL + "/" + prefix + "/" + testGroupVersion.Group + "/" + testGroupVersion.Version + "/namespaces/default/simple/id")
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if resp.StatusCode != http.StatusInternalServerError {
t.Errorf("Unexpected response %#v", resp)
}
if resp.Header.Get("Retry-After") != "2" {
t.Errorf("Unexpected Retry-After header: %v", resp.Header)
}
}
func TestConnect(t *testing.T) {
responseText := "Hello World"
itemID := "theID"

9
plugin/pkg/admission/serviceaccount/admission.go
View File

@ -28,6 +28,7 @@ import (
"k8s.io/kubernetes/pkg/admission"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/client/cache"
"k8s.io/kubernetes/pkg/fields"
kubelet "k8s.io/kubernetes/pkg/kubelet/types"
@ -199,6 +200,9 @@ func (s *serviceAccount) Admit(a admission.Attributes) (err error) {
if s.MountServiceAccountToken {
if err := s.mountServiceAccountToken(serviceAccount, pod); err != nil {
if _, ok := err.(errors.APIStatus); ok {
return err
}
return admission.NewForbidden(a, err)
}
}
@ -357,8 +361,9 @@ func (s *serviceAccount) mountServiceAccountToken(serviceAccount *api.ServiceAcc
// We don't have an API token to mount, so return
if s.RequireAPIToken {
// If a token is required, this is considered an error
// TODO: convert to a ServerTimeout error (or other error that sends a Retry-After header)
return fmt.Errorf("no API token found for service account %s/%s, retry after the token is automatically created and added to the service account", serviceAccount.Namespace, serviceAccount.Name)
err := errors.NewServerTimeout(unversioned.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
}

5
plugin/pkg/admission/serviceaccount/admission_test.go
View File

@ -23,6 +23,7 @@ import (
"k8s.io/kubernetes/pkg/admission"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
kubelet "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/types"
@ -168,8 +169,8 @@ func TestAssignsDefaultServiceAccountAndRejectsMissingAPIToken(t *testing.T) {
pod := &api.Pod{}
attrs := admission.NewAttributesRecord(pod, api.Kind("Pod").WithVersion("version"), ns, "myname", api.Resource("pods").WithVersion("version"), "", admission.Create, nil)
err := admit.Admit(attrs)
if err == nil {
t.Errorf("Expected admission error for missing API token")
if err == nil || !errors.IsServerTimeout(err) {
t.Errorf("Expected server timeout error for missing API token: %v", err)
}
}