func createResourceQuota(client client.Interface, indexer cache.Indexer) admission.Interface {
return "a{
Handler: admission.NewHandler(admission.Create, admission.Update),
client: client,
indexer: indexer,
}
}
func TestLimitRangerIgnoresSubresource(t *testing.T) {
client := testclient.NewSimpleFake()
indexer := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{"namespace": cache.MetaNamespaceIndexFunc})
handler := &limitRanger{
Handler: admission.NewHandler(admission.Create, admission.Update),
client: client,
limitFunc: Limit,
indexer: indexer,
}
limitRange := validLimitRangeNoDefaults()
testPod := validPod("testPod", 1, api.ResourceRequirements{})
indexer.Add(&limitRange)
err := handler.Admit(admission.NewAttributesRecord(&testPod, "Pod", limitRange.Namespace, "testPod", "pods", "", admission.Update, nil))
if err == nil {
t.Errorf("Expected an error since the pod did not specify resource limits in its update call")
}
err = handler.Admit(admission.NewAttributesRecord(&testPod, "Pod", limitRange.Namespace, "testPod", "pods", "status", admission.Update, nil))
if err != nil {
t.Errorf("Should have ignored calls to any subresource of pod %v", err)
}
}
func createProvision(c client.Interface, store cache.Store) admission.Interface {
return &provision{
Handler: admission.NewHandler(admission.Create),
client: c,
store: store,
}
}
func newInitialResources(source dataSource, percentile int64, nsOnly bool) admission.Interface {
return &initialResources{
Handler: admission.NewHandler(admission.Create),
source: source,
percentile: percentile,
nsOnly: nsOnly,
}
}
func TestAdmission(t *testing.T) {
privPod := validPod("privileged")
priv := true
privPod.Spec.Containers[0].SecurityContext = &api.SecurityContext{
Privileged: &priv,
}
hostPIDPod := validPod("hostPID")
hostPIDPod.Spec.HostPID = true
hostIPCPod := validPod("hostIPC")
hostIPCPod.Spec.HostIPC = true
testCases := map[string]struct {
pod *api.Pod
shouldAccept bool
}{
"priv": {
shouldAccept: false,
pod: privPod,
},
"hostPID": {
shouldAccept: false,
pod: hostPIDPod,
},
"hostIPC": {
shouldAccept: false,
pod: hostIPCPod,
},
"non privileged": {
shouldAccept: true,
pod: validPod("nonPrivileged"),
},
}
// use the same code as NewDenyEscalatingExec, using the direct object though to allow testAdmission to
// inject the client
handler := &denyExec{
Handler: admission.NewHandler(admission.Connect),
hostIPC: true,
hostPID: true,
privileged: true,
}
for _, tc := range testCases {
testAdmission(t, tc.pod, handler, tc.shouldAccept)
}
// run with a permissive config and all cases should pass
handler.privileged = false
handler.hostPID = false
handler.hostIPC = false
for _, tc := range testCases {
testAdmission(t, tc.pod, handler, true)
}
}
// NewDenyExecOnPrivileged creates a new admission controller that is only checking the privileged
// option. This is for legacy support of the DenyExecOnPrivileged admission controller. Most
// of the time NewDenyEscalatingExec should be preferred.
func NewDenyExecOnPrivileged(client client.Interface) admission.Interface {
return &denyExec{
Handler: admission.NewHandler(admission.Connect),
client: client,
hostIPC: false,
hostPID: false,
privileged: true,
}
}
// NewLimitRanger returns an object that enforces limits based on the supplied limit function
func NewLimitRanger(client client.Interface, limitFunc LimitFunc) admission.Interface {
lw := &cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return client.LimitRanges(api.NamespaceAll).List(labels.Everything())
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return client.LimitRanges(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), resourceVersion)
},
}
indexer, reflector := cache.NewNamespaceKeyedIndexerAndReflector(lw, &api.LimitRange{}, 0)
reflector.Run()
return &limitRanger{
Handler: admission.NewHandler(admission.Create, admission.Update),
client: client,
limitFunc: limitFunc,
indexer: indexer,
}
}
// NewServiceAccount returns an admission.Interface implementation which limits admission of Pod CREATE requests based on the pod's ServiceAccount:
// 1. If the pod does not specify a ServiceAccount, it sets the pod's ServiceAccount to "default"
// 2. It ensures the ServiceAccount referenced by the pod exists
// 3. If LimitSecretReferences is true, it rejects the pod if the pod references Secret objects which the pod's ServiceAccount does not reference
// 4. If the pod does not contain any ImagePullSecrets, the ImagePullSecrets of the service account are added.
// 5. If MountServiceAccountToken is true, it adds a VolumeMount with the pod's ServiceAccount's api token secret to containers
func NewServiceAccount(cl client.Interface) *serviceAccount {
serviceAccountsIndexer, serviceAccountsReflector := cache.NewNamespaceKeyedIndexerAndReflector(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return cl.ServiceAccounts(api.NamespaceAll).List(labels.Everything(), fields.Everything())
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return cl.ServiceAccounts(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), resourceVersion)
},
},
&api.ServiceAccount{},
0,
)
tokenSelector := fields.SelectorFromSet(map[string]string{client.SecretType: string(api.SecretTypeServiceAccountToken)})
secretsIndexer, secretsReflector := cache.NewNamespaceKeyedIndexerAndReflector(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return cl.Secrets(api.NamespaceAll).List(labels.Everything(), tokenSelector)
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return cl.Secrets(api.NamespaceAll).Watch(labels.Everything(), tokenSelector, resourceVersion)
},
},
&api.Secret{},
0,
)
return &serviceAccount{
Handler: admission.NewHandler(admission.Create),
// TODO: enable this once we've swept secret usage to account for adding secret references to service accounts
LimitSecretReferences: false,
// Auto mount service account API token secrets
MountServiceAccountToken: true,
// Reject pod creation until a service account token is available
RequireAPIToken: true,
client: cl,
serviceAccounts: serviceAccountsIndexer,
serviceAccountsReflector: serviceAccountsReflector,
secrets: secretsIndexer,
secretsReflector: secretsReflector,
}
}
// NewExists creates a new namespace exists admission control handler
func NewExists(c client.Interface) admission.Interface {
store := cache.NewStore(cache.MetaNamespaceKeyFunc)
reflector := cache.NewReflector(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return c.Namespaces().List(labels.Everything(), fields.Everything())
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return c.Namespaces().Watch(labels.Everything(), fields.Everything(), resourceVersion)
},
},
&api.Namespace{},
store,
5*time.Minute,
)
reflector.Run()
return &exists{
client: c,
store: store,
Handler: admission.NewHandler(admission.Create, admission.Update, admission.Delete),
}
}
// NewSecurityContextDeny creates a new instance of the SecurityContextDeny admission controller
func NewSecurityContextDeny(client client.Interface) admission.Interface {
return &plugin{
Handler: admission.NewHandler(admission.Create, admission.Update),
client: client,
}
}
