mirror of
https://github.com/k3s-io/kubernetes.git
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6a75e7c40c
This commit is the main API piece of KEP-3257 (ClusterTrustBundles). This commit: * Adds the certificates.k8s.io/v1alpha1 API group * Adds the ClusterTrustBundle type. * Registers the new type in kube-apiserver. * Implements the type-specfic validation specified for ClusterTrustBundles: - spec.pemTrustAnchors must always be non-empty. - spec.signerName must be either empty or a valid signer name. - Changing spec.signerName is disallowed. * Implements the "attest" admission check to restrict actions on ClusterTrustBundles that include a signer name. Because it wasn't specified in the KEP, I chose to make attempts to update the signer name be validation errors, rather than silently ignored. I have tested this out by launching these changes in kind and manipulating ClusterTrustBundle objects in the resulting cluster using kubectl.
760 lines
33 KiB
Go
760 lines
33 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package controlplane
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import (
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"fmt"
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"net"
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"net/http"
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"os"
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"reflect"
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"strconv"
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"time"
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admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
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admissionregistrationv1alpha1 "k8s.io/api/admissionregistration/v1alpha1"
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apiserverinternalv1alpha1 "k8s.io/api/apiserverinternal/v1alpha1"
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appsv1 "k8s.io/api/apps/v1"
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authenticationv1 "k8s.io/api/authentication/v1"
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authenticationv1alpha1 "k8s.io/api/authentication/v1alpha1"
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authenticationv1beta1 "k8s.io/api/authentication/v1beta1"
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authorizationapiv1 "k8s.io/api/authorization/v1"
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autoscalingapiv1 "k8s.io/api/autoscaling/v1"
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autoscalingapiv2 "k8s.io/api/autoscaling/v2"
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autoscalingapiv2beta1 "k8s.io/api/autoscaling/v2beta1"
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autoscalingapiv2beta2 "k8s.io/api/autoscaling/v2beta2"
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batchapiv1 "k8s.io/api/batch/v1"
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batchapiv1beta1 "k8s.io/api/batch/v1beta1"
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certificatesapiv1 "k8s.io/api/certificates/v1"
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certificatesv1alpha1 "k8s.io/api/certificates/v1alpha1"
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coordinationapiv1 "k8s.io/api/coordination/v1"
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apiv1 "k8s.io/api/core/v1"
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discoveryv1 "k8s.io/api/discovery/v1"
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discoveryv1beta1 "k8s.io/api/discovery/v1beta1"
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eventsv1 "k8s.io/api/events/v1"
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eventsv1beta1 "k8s.io/api/events/v1beta1"
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flowcontrolv1alpha1 "k8s.io/api/flowcontrol/v1alpha1"
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networkingapiv1 "k8s.io/api/networking/v1"
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networkingapiv1alpha1 "k8s.io/api/networking/v1alpha1"
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nodev1 "k8s.io/api/node/v1"
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nodev1beta1 "k8s.io/api/node/v1beta1"
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policyapiv1 "k8s.io/api/policy/v1"
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policyapiv1beta1 "k8s.io/api/policy/v1beta1"
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rbacv1 "k8s.io/api/rbac/v1"
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resourcev1alpha2 "k8s.io/api/resource/v1alpha2"
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schedulingapiv1 "k8s.io/api/scheduling/v1"
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storageapiv1 "k8s.io/api/storage/v1"
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storageapiv1alpha1 "k8s.io/api/storage/v1alpha1"
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storageapiv1beta1 "k8s.io/api/storage/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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utilnet "k8s.io/apimachinery/pkg/util/net"
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"k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/apiserver/pkg/endpoints/discovery"
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apiserverfeatures "k8s.io/apiserver/pkg/features"
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"k8s.io/apiserver/pkg/registry/generic"
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genericapiserver "k8s.io/apiserver/pkg/server"
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"k8s.io/apiserver/pkg/server/dynamiccertificates"
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serverstorage "k8s.io/apiserver/pkg/server/storage"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/client-go/informers"
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"k8s.io/client-go/kubernetes"
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corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
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discoveryclient "k8s.io/client-go/kubernetes/typed/discovery/v1"
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"k8s.io/component-helpers/apimachinery/lease"
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"k8s.io/klog/v2"
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api "k8s.io/kubernetes/pkg/apis/core"
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flowcontrolv1beta1 "k8s.io/kubernetes/pkg/apis/flowcontrol/v1beta1"
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flowcontrolv1beta2 "k8s.io/kubernetes/pkg/apis/flowcontrol/v1beta2"
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flowcontrolv1beta3 "k8s.io/kubernetes/pkg/apis/flowcontrol/v1beta3"
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"k8s.io/kubernetes/pkg/controlplane/controller/apiserverleasegc"
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"k8s.io/kubernetes/pkg/controlplane/controller/clusterauthenticationtrust"
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"k8s.io/kubernetes/pkg/controlplane/controller/legacytokentracking"
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"k8s.io/kubernetes/pkg/controlplane/controller/systemnamespaces"
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"k8s.io/kubernetes/pkg/controlplane/reconcilers"
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kubeoptions "k8s.io/kubernetes/pkg/kubeapiserver/options"
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kubeletclient "k8s.io/kubernetes/pkg/kubelet/client"
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"k8s.io/kubernetes/pkg/routes"
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"k8s.io/kubernetes/pkg/serviceaccount"
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"k8s.io/utils/clock"
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// RESTStorage installers
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admissionregistrationrest "k8s.io/kubernetes/pkg/registry/admissionregistration/rest"
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apiserverinternalrest "k8s.io/kubernetes/pkg/registry/apiserverinternal/rest"
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appsrest "k8s.io/kubernetes/pkg/registry/apps/rest"
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authenticationrest "k8s.io/kubernetes/pkg/registry/authentication/rest"
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authorizationrest "k8s.io/kubernetes/pkg/registry/authorization/rest"
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autoscalingrest "k8s.io/kubernetes/pkg/registry/autoscaling/rest"
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batchrest "k8s.io/kubernetes/pkg/registry/batch/rest"
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certificatesrest "k8s.io/kubernetes/pkg/registry/certificates/rest"
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coordinationrest "k8s.io/kubernetes/pkg/registry/coordination/rest"
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corerest "k8s.io/kubernetes/pkg/registry/core/rest"
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discoveryrest "k8s.io/kubernetes/pkg/registry/discovery/rest"
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eventsrest "k8s.io/kubernetes/pkg/registry/events/rest"
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flowcontrolrest "k8s.io/kubernetes/pkg/registry/flowcontrol/rest"
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networkingrest "k8s.io/kubernetes/pkg/registry/networking/rest"
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noderest "k8s.io/kubernetes/pkg/registry/node/rest"
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policyrest "k8s.io/kubernetes/pkg/registry/policy/rest"
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rbacrest "k8s.io/kubernetes/pkg/registry/rbac/rest"
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resourcerest "k8s.io/kubernetes/pkg/registry/resource/rest"
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schedulingrest "k8s.io/kubernetes/pkg/registry/scheduling/rest"
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storagerest "k8s.io/kubernetes/pkg/registry/storage/rest"
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)
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const (
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// DefaultEndpointReconcilerInterval is the default amount of time for how often the endpoints for
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// the kubernetes Service are reconciled.
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DefaultEndpointReconcilerInterval = 10 * time.Second
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// DefaultEndpointReconcilerTTL is the default TTL timeout for the storage layer
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DefaultEndpointReconcilerTTL = 15 * time.Second
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// IdentityLeaseComponentLabelKey is used to apply a component label to identity lease objects, indicating:
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// 1. the lease is an identity lease (different from leader election leases)
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// 2. which component owns this lease
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IdentityLeaseComponentLabelKey = "apiserver.kubernetes.io/identity"
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// KubeAPIServer defines variable used internally when referring to kube-apiserver component
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KubeAPIServer = "kube-apiserver"
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// DeprecatedKubeAPIServerIdentityLeaseLabelSelector selects kube-apiserver identity leases
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DeprecatedKubeAPIServerIdentityLeaseLabelSelector = "k8s.io/component=kube-apiserver"
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// KubeAPIServerIdentityLeaseLabelSelector selects kube-apiserver identity leases
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KubeAPIServerIdentityLeaseLabelSelector = IdentityLeaseComponentLabelKey + "=" + KubeAPIServer
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// repairLoopInterval defines the interval used to run the Services ClusterIP and NodePort repair loops
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repairLoopInterval = 3 * time.Minute
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)
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var (
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// IdentityLeaseGCPeriod is the interval which the lease GC controller checks for expired leases
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// IdentityLeaseGCPeriod is exposed so integration tests can tune this value.
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IdentityLeaseGCPeriod = 3600 * time.Second
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// IdentityLeaseDurationSeconds is the duration of kube-apiserver lease in seconds
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// IdentityLeaseDurationSeconds is exposed so integration tests can tune this value.
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IdentityLeaseDurationSeconds = 3600
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// IdentityLeaseRenewIntervalSeconds is the interval of kube-apiserver renewing its lease in seconds
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// IdentityLeaseRenewIntervalSeconds is exposed so integration tests can tune this value.
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IdentityLeaseRenewIntervalPeriod = 10 * time.Second
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)
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// ExtraConfig defines extra configuration for the master
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type ExtraConfig struct {
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ClusterAuthenticationInfo clusterauthenticationtrust.ClusterAuthenticationInfo
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APIResourceConfigSource serverstorage.APIResourceConfigSource
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StorageFactory serverstorage.StorageFactory
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EndpointReconcilerConfig EndpointReconcilerConfig
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EventTTL time.Duration
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KubeletClientConfig kubeletclient.KubeletClientConfig
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EnableLogsSupport bool
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ProxyTransport *http.Transport
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// Values to build the IP addresses used by discovery
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// The range of IPs to be assigned to services with type=ClusterIP or greater
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ServiceIPRange net.IPNet
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// The IP address for the GenericAPIServer service (must be inside ServiceIPRange)
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APIServerServiceIP net.IP
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// dual stack services, the range represents an alternative IP range for service IP
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// must be of different family than primary (ServiceIPRange)
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SecondaryServiceIPRange net.IPNet
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// the secondary IP address the GenericAPIServer service (must be inside SecondaryServiceIPRange)
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SecondaryAPIServerServiceIP net.IP
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// Port for the apiserver service.
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APIServerServicePort int
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// TODO, we can probably group service related items into a substruct to make it easier to configure
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// the API server items and `Extra*` fields likely fit nicely together.
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// The range of ports to be assigned to services with type=NodePort or greater
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ServiceNodePortRange utilnet.PortRange
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// If non-zero, the "kubernetes" services uses this port as NodePort.
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KubernetesServiceNodePort int
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// Number of masters running; all masters must be started with the
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// same value for this field. (Numbers > 1 currently untested.)
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MasterCount int
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// MasterEndpointReconcileTTL sets the time to live in seconds of an
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// endpoint record recorded by each master. The endpoints are checked at an
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// interval that is 2/3 of this value and this value defaults to 15s if
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// unset. In very large clusters, this value may be increased to reduce the
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// possibility that the master endpoint record expires (due to other load
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// on the etcd server) and causes masters to drop in and out of the
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// kubernetes service record. It is not recommended to set this value below
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// 15s.
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MasterEndpointReconcileTTL time.Duration
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// Selects which reconciler to use
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EndpointReconcilerType reconcilers.Type
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ServiceAccountIssuer serviceaccount.TokenGenerator
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ServiceAccountMaxExpiration time.Duration
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ExtendExpiration bool
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// ServiceAccountIssuerDiscovery
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ServiceAccountIssuerURL string
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ServiceAccountJWKSURI string
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ServiceAccountPublicKeys []interface{}
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VersionedInformers informers.SharedInformerFactory
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// RepairServicesInterval interval used by the repair loops for
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// the Services NodePort and ClusterIP resources
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RepairServicesInterval time.Duration
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}
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// Config defines configuration for the master
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type Config struct {
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GenericConfig *genericapiserver.Config
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ExtraConfig ExtraConfig
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}
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type completedConfig struct {
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GenericConfig genericapiserver.CompletedConfig
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ExtraConfig *ExtraConfig
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}
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// CompletedConfig embeds a private pointer that cannot be instantiated outside of this package
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type CompletedConfig struct {
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*completedConfig
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}
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// EndpointReconcilerConfig holds the endpoint reconciler and endpoint reconciliation interval to be
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// used by the master.
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type EndpointReconcilerConfig struct {
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Reconciler reconcilers.EndpointReconciler
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Interval time.Duration
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}
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// Instance contains state for a Kubernetes cluster api server instance.
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type Instance struct {
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GenericAPIServer *genericapiserver.GenericAPIServer
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ClusterAuthenticationInfo clusterauthenticationtrust.ClusterAuthenticationInfo
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}
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func (c *Config) createMasterCountReconciler() reconcilers.EndpointReconciler {
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endpointClient := corev1client.NewForConfigOrDie(c.GenericConfig.LoopbackClientConfig)
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endpointSliceClient := discoveryclient.NewForConfigOrDie(c.GenericConfig.LoopbackClientConfig)
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endpointsAdapter := reconcilers.NewEndpointsAdapter(endpointClient, endpointSliceClient)
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return reconcilers.NewMasterCountEndpointReconciler(c.ExtraConfig.MasterCount, endpointsAdapter)
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}
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func (c *Config) createNoneReconciler() reconcilers.EndpointReconciler {
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return reconcilers.NewNoneEndpointReconciler()
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}
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func (c *Config) createLeaseReconciler() reconcilers.EndpointReconciler {
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endpointClient := corev1client.NewForConfigOrDie(c.GenericConfig.LoopbackClientConfig)
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endpointSliceClient := discoveryclient.NewForConfigOrDie(c.GenericConfig.LoopbackClientConfig)
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endpointsAdapter := reconcilers.NewEndpointsAdapter(endpointClient, endpointSliceClient)
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ttl := c.ExtraConfig.MasterEndpointReconcileTTL
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config, err := c.ExtraConfig.StorageFactory.NewConfig(api.Resource("apiServerIPInfo"))
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if err != nil {
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klog.Fatalf("Error creating storage factory config: %v", err)
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}
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masterLeases, err := reconcilers.NewLeases(config, "/masterleases/", ttl)
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if err != nil {
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klog.Fatalf("Error creating leases: %v", err)
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}
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return reconcilers.NewLeaseEndpointReconciler(endpointsAdapter, masterLeases)
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}
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func (c *Config) createEndpointReconciler() reconcilers.EndpointReconciler {
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klog.Infof("Using reconciler: %v", c.ExtraConfig.EndpointReconcilerType)
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switch c.ExtraConfig.EndpointReconcilerType {
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// there are numerous test dependencies that depend on a default controller
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case reconcilers.MasterCountReconcilerType:
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return c.createMasterCountReconciler()
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case "", reconcilers.LeaseEndpointReconcilerType:
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return c.createLeaseReconciler()
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case reconcilers.NoneEndpointReconcilerType:
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return c.createNoneReconciler()
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default:
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klog.Fatalf("Reconciler not implemented: %v", c.ExtraConfig.EndpointReconcilerType)
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}
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return nil
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}
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// Complete fills in any fields not set that are required to have valid data. It's mutating the receiver.
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func (c *Config) Complete() CompletedConfig {
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cfg := completedConfig{
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c.GenericConfig.Complete(c.ExtraConfig.VersionedInformers),
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&c.ExtraConfig,
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}
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serviceIPRange, apiServerServiceIP, err := ServiceIPRange(cfg.ExtraConfig.ServiceIPRange)
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if err != nil {
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klog.Fatalf("Error determining service IP ranges: %v", err)
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}
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if cfg.ExtraConfig.ServiceIPRange.IP == nil {
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cfg.ExtraConfig.ServiceIPRange = serviceIPRange
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}
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if cfg.ExtraConfig.APIServerServiceIP == nil {
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cfg.ExtraConfig.APIServerServiceIP = apiServerServiceIP
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}
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discoveryAddresses := discovery.DefaultAddresses{DefaultAddress: cfg.GenericConfig.ExternalAddress}
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discoveryAddresses.CIDRRules = append(discoveryAddresses.CIDRRules,
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discovery.CIDRRule{IPRange: cfg.ExtraConfig.ServiceIPRange, Address: net.JoinHostPort(cfg.ExtraConfig.APIServerServiceIP.String(), strconv.Itoa(cfg.ExtraConfig.APIServerServicePort))})
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cfg.GenericConfig.DiscoveryAddresses = discoveryAddresses
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if cfg.ExtraConfig.ServiceNodePortRange.Size == 0 {
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// TODO: Currently no way to specify an empty range (do we need to allow this?)
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// We should probably allow this for clouds that don't require NodePort to do load-balancing (GCE)
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// but then that breaks the strict nestedness of ServiceType.
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// Review post-v1
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cfg.ExtraConfig.ServiceNodePortRange = kubeoptions.DefaultServiceNodePortRange
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klog.Infof("Node port range unspecified. Defaulting to %v.", cfg.ExtraConfig.ServiceNodePortRange)
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}
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if cfg.ExtraConfig.EndpointReconcilerConfig.Interval == 0 {
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cfg.ExtraConfig.EndpointReconcilerConfig.Interval = DefaultEndpointReconcilerInterval
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}
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if cfg.ExtraConfig.MasterEndpointReconcileTTL == 0 {
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cfg.ExtraConfig.MasterEndpointReconcileTTL = DefaultEndpointReconcilerTTL
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}
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if cfg.ExtraConfig.EndpointReconcilerConfig.Reconciler == nil {
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cfg.ExtraConfig.EndpointReconcilerConfig.Reconciler = c.createEndpointReconciler()
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}
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if cfg.ExtraConfig.RepairServicesInterval == 0 {
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cfg.ExtraConfig.RepairServicesInterval = repairLoopInterval
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}
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return CompletedConfig{&cfg}
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}
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// New returns a new instance of Master from the given config.
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// Certain config fields will be set to a default value if unset.
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// Certain config fields must be specified, including:
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// KubeletClientConfig
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func (c completedConfig) New(delegationTarget genericapiserver.DelegationTarget) (*Instance, error) {
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if reflect.DeepEqual(c.ExtraConfig.KubeletClientConfig, kubeletclient.KubeletClientConfig{}) {
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return nil, fmt.Errorf("Master.New() called with empty config.KubeletClientConfig")
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}
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s, err := c.GenericConfig.New("kube-apiserver", delegationTarget)
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if err != nil {
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return nil, err
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}
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if c.ExtraConfig.EnableLogsSupport {
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routes.Logs{}.Install(s.Handler.GoRestfulContainer)
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}
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// Metadata and keys are expected to only change across restarts at present,
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// so we just marshal immediately and serve the cached JSON bytes.
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md, err := serviceaccount.NewOpenIDMetadata(
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c.ExtraConfig.ServiceAccountIssuerURL,
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c.ExtraConfig.ServiceAccountJWKSURI,
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c.GenericConfig.ExternalAddress,
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c.ExtraConfig.ServiceAccountPublicKeys,
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)
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if err != nil {
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// If there was an error, skip installing the endpoints and log the
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// error, but continue on. We don't return the error because the
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// metadata responses require additional, backwards incompatible
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// validation of command-line options.
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msg := fmt.Sprintf("Could not construct pre-rendered responses for"+
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" ServiceAccountIssuerDiscovery endpoints. Endpoints will not be"+
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" enabled. Error: %v", err)
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if c.ExtraConfig.ServiceAccountIssuerURL != "" {
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// The user likely expects this feature to be enabled if issuer URL is
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// set and the feature gate is enabled. In the future, if there is no
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// longer a feature gate and issuer URL is not set, the user may not
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// expect this feature to be enabled. We log the former case as an Error
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// and the latter case as an Info.
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klog.Error(msg)
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} else {
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klog.Info(msg)
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}
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} else {
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routes.NewOpenIDMetadataServer(md.ConfigJSON, md.PublicKeysetJSON).
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Install(s.Handler.GoRestfulContainer)
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}
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m := &Instance{
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GenericAPIServer: s,
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ClusterAuthenticationInfo: c.ExtraConfig.ClusterAuthenticationInfo,
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}
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|
// install legacy rest storage
|
|
|
|
if err := m.InstallLegacyAPI(&c, c.GenericConfig.RESTOptionsGetter); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
clientset, err := kubernetes.NewForConfig(c.GenericConfig.LoopbackClientConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// TODO: update to a version that caches success but will recheck on failure, unlike memcache discovery
|
|
discoveryClientForAdmissionRegistration := clientset.Discovery()
|
|
|
|
// The order here is preserved in discovery.
|
|
// If resources with identical names exist in more than one of these groups (e.g. "deployments.apps"" and "deployments.extensions"),
|
|
// the order of this list determines which group an unqualified resource name (e.g. "deployments") should prefer.
|
|
// This priority order is used for local discovery, but it ends up aggregated in `k8s.io/kubernetes/cmd/kube-apiserver/app/aggregator.go
|
|
// with specific priorities.
|
|
// TODO: describe the priority all the way down in the RESTStorageProviders and plumb it back through the various discovery
|
|
// handlers that we have.
|
|
restStorageProviders := []RESTStorageProvider{
|
|
apiserverinternalrest.StorageProvider{},
|
|
authenticationrest.RESTStorageProvider{Authenticator: c.GenericConfig.Authentication.Authenticator, APIAudiences: c.GenericConfig.Authentication.APIAudiences},
|
|
authorizationrest.RESTStorageProvider{Authorizer: c.GenericConfig.Authorization.Authorizer, RuleResolver: c.GenericConfig.RuleResolver},
|
|
autoscalingrest.RESTStorageProvider{},
|
|
batchrest.RESTStorageProvider{},
|
|
certificatesrest.RESTStorageProvider{},
|
|
coordinationrest.RESTStorageProvider{},
|
|
discoveryrest.StorageProvider{},
|
|
networkingrest.RESTStorageProvider{},
|
|
noderest.RESTStorageProvider{},
|
|
policyrest.RESTStorageProvider{},
|
|
rbacrest.RESTStorageProvider{Authorizer: c.GenericConfig.Authorization.Authorizer},
|
|
schedulingrest.RESTStorageProvider{},
|
|
storagerest.RESTStorageProvider{},
|
|
flowcontrolrest.RESTStorageProvider{InformerFactory: c.GenericConfig.SharedInformerFactory},
|
|
// keep apps after extensions so legacy clients resolve the extensions versions of shared resource names.
|
|
// See https://github.com/kubernetes/kubernetes/issues/42392
|
|
appsrest.StorageProvider{},
|
|
admissionregistrationrest.RESTStorageProvider{Authorizer: c.GenericConfig.Authorization.Authorizer, DiscoveryClient: discoveryClientForAdmissionRegistration},
|
|
eventsrest.RESTStorageProvider{TTL: c.ExtraConfig.EventTTL},
|
|
resourcerest.RESTStorageProvider{},
|
|
}
|
|
if err := m.InstallAPIs(c.ExtraConfig.APIResourceConfigSource, c.GenericConfig.RESTOptionsGetter, restStorageProviders...); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
m.GenericAPIServer.AddPostStartHookOrDie("start-cluster-authentication-info-controller", func(hookContext genericapiserver.PostStartHookContext) error {
|
|
kubeClient, err := kubernetes.NewForConfig(hookContext.LoopbackClientConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
controller := clusterauthenticationtrust.NewClusterAuthenticationTrustController(m.ClusterAuthenticationInfo, kubeClient)
|
|
|
|
// generate a context from stopCh. This is to avoid modifying files which are relying on apiserver
|
|
// TODO: See if we can pass ctx to the current method
|
|
ctx := wait.ContextForChannel(hookContext.StopCh)
|
|
|
|
// prime values and start listeners
|
|
if m.ClusterAuthenticationInfo.ClientCA != nil {
|
|
m.ClusterAuthenticationInfo.ClientCA.AddListener(controller)
|
|
if controller, ok := m.ClusterAuthenticationInfo.ClientCA.(dynamiccertificates.ControllerRunner); ok {
|
|
// runonce to be sure that we have a value.
|
|
if err := controller.RunOnce(ctx); err != nil {
|
|
runtime.HandleError(err)
|
|
}
|
|
go controller.Run(ctx, 1)
|
|
}
|
|
}
|
|
if m.ClusterAuthenticationInfo.RequestHeaderCA != nil {
|
|
m.ClusterAuthenticationInfo.RequestHeaderCA.AddListener(controller)
|
|
if controller, ok := m.ClusterAuthenticationInfo.RequestHeaderCA.(dynamiccertificates.ControllerRunner); ok {
|
|
// runonce to be sure that we have a value.
|
|
if err := controller.RunOnce(ctx); err != nil {
|
|
runtime.HandleError(err)
|
|
}
|
|
go controller.Run(ctx, 1)
|
|
}
|
|
}
|
|
|
|
go controller.Run(ctx, 1)
|
|
return nil
|
|
})
|
|
|
|
if utilfeature.DefaultFeatureGate.Enabled(apiserverfeatures.APIServerIdentity) {
|
|
m.GenericAPIServer.AddPostStartHookOrDie("start-kube-apiserver-identity-lease-controller", func(hookContext genericapiserver.PostStartHookContext) error {
|
|
kubeClient, err := kubernetes.NewForConfig(hookContext.LoopbackClientConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// generate a context from stopCh. This is to avoid modifying files which are relying on apiserver
|
|
// TODO: See if we can pass ctx to the current method
|
|
ctx := wait.ContextForChannel(hookContext.StopCh)
|
|
|
|
leaseName := m.GenericAPIServer.APIServerID
|
|
holderIdentity := m.GenericAPIServer.APIServerID + "_" + string(uuid.NewUUID())
|
|
|
|
controller := lease.NewController(
|
|
clock.RealClock{},
|
|
kubeClient,
|
|
holderIdentity,
|
|
int32(IdentityLeaseDurationSeconds),
|
|
nil,
|
|
IdentityLeaseRenewIntervalPeriod,
|
|
leaseName,
|
|
metav1.NamespaceSystem,
|
|
// TODO: receive identity label value as a parameter when post start hook is moved to generic apiserver.
|
|
labelAPIServerHeartbeatFunc(KubeAPIServer))
|
|
go controller.Run(ctx)
|
|
return nil
|
|
})
|
|
// Labels for apiserver idenitiy leases switched from k8s.io/component=kube-apiserver to apiserver.kubernetes.io/identity=kube-apiserver.
|
|
// For compatibility, garbage collect leases with both labels for at least 1 release
|
|
// TODO: remove in Kubernetes 1.28
|
|
m.GenericAPIServer.AddPostStartHookOrDie("start-deprecated-kube-apiserver-identity-lease-garbage-collector", func(hookContext genericapiserver.PostStartHookContext) error {
|
|
kubeClient, err := kubernetes.NewForConfig(hookContext.LoopbackClientConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
go apiserverleasegc.NewAPIServerLeaseGC(
|
|
kubeClient,
|
|
IdentityLeaseGCPeriod,
|
|
metav1.NamespaceSystem,
|
|
DeprecatedKubeAPIServerIdentityLeaseLabelSelector,
|
|
).Run(hookContext.StopCh)
|
|
return nil
|
|
})
|
|
// TODO: move this into generic apiserver and make the lease identity value configurable
|
|
m.GenericAPIServer.AddPostStartHookOrDie("start-kube-apiserver-identity-lease-garbage-collector", func(hookContext genericapiserver.PostStartHookContext) error {
|
|
kubeClient, err := kubernetes.NewForConfig(hookContext.LoopbackClientConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
go apiserverleasegc.NewAPIServerLeaseGC(
|
|
kubeClient,
|
|
IdentityLeaseGCPeriod,
|
|
metav1.NamespaceSystem,
|
|
KubeAPIServerIdentityLeaseLabelSelector,
|
|
).Run(hookContext.StopCh)
|
|
return nil
|
|
})
|
|
}
|
|
|
|
m.GenericAPIServer.AddPostStartHookOrDie("start-legacy-token-tracking-controller", func(hookContext genericapiserver.PostStartHookContext) error {
|
|
kubeClient, err := kubernetes.NewForConfig(hookContext.LoopbackClientConfig)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
go legacytokentracking.NewController(kubeClient).Run(hookContext.StopCh)
|
|
return nil
|
|
})
|
|
|
|
return m, nil
|
|
}
|
|
|
|
func labelAPIServerHeartbeatFunc(identity string) lease.ProcessLeaseFunc {
|
|
return func(lease *coordinationapiv1.Lease) error {
|
|
if lease.Labels == nil {
|
|
lease.Labels = map[string]string{}
|
|
}
|
|
|
|
// This label indiciates the identity of the lease object.
|
|
lease.Labels[IdentityLeaseComponentLabelKey] = identity
|
|
|
|
hostname, err := os.Hostname()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// convenience label to easily map a lease object to a specific apiserver
|
|
lease.Labels[apiv1.LabelHostname] = hostname
|
|
return nil
|
|
}
|
|
}
|
|
|
|
// InstallLegacyAPI will install the legacy APIs for the restStorageProviders if they are enabled.
|
|
func (m *Instance) InstallLegacyAPI(c *completedConfig, restOptionsGetter generic.RESTOptionsGetter) error {
|
|
legacyRESTStorageProvider := corerest.LegacyRESTStorageProvider{
|
|
StorageFactory: c.ExtraConfig.StorageFactory,
|
|
ProxyTransport: c.ExtraConfig.ProxyTransport,
|
|
KubeletClientConfig: c.ExtraConfig.KubeletClientConfig,
|
|
EventTTL: c.ExtraConfig.EventTTL,
|
|
ServiceIPRange: c.ExtraConfig.ServiceIPRange,
|
|
SecondaryServiceIPRange: c.ExtraConfig.SecondaryServiceIPRange,
|
|
ServiceNodePortRange: c.ExtraConfig.ServiceNodePortRange,
|
|
LoopbackClientConfig: c.GenericConfig.LoopbackClientConfig,
|
|
ServiceAccountIssuer: c.ExtraConfig.ServiceAccountIssuer,
|
|
ExtendExpiration: c.ExtraConfig.ExtendExpiration,
|
|
ServiceAccountMaxExpiration: c.ExtraConfig.ServiceAccountMaxExpiration,
|
|
APIAudiences: c.GenericConfig.Authentication.APIAudiences,
|
|
Informers: c.ExtraConfig.VersionedInformers,
|
|
}
|
|
legacyRESTStorage, apiGroupInfo, err := legacyRESTStorageProvider.NewLegacyRESTStorage(c.ExtraConfig.APIResourceConfigSource, restOptionsGetter)
|
|
if err != nil {
|
|
return fmt.Errorf("error building core storage: %v", err)
|
|
}
|
|
if len(apiGroupInfo.VersionedResourcesStorageMap) == 0 { // if all core storage is disabled, return.
|
|
return nil
|
|
}
|
|
|
|
controllerName := "bootstrap-controller"
|
|
client := kubernetes.NewForConfigOrDie(c.GenericConfig.LoopbackClientConfig)
|
|
// Kubernetes clusters contains the following system namespaces:
|
|
// kube-system, kube-node-lease, kube-public, default
|
|
m.GenericAPIServer.AddPostStartHookOrDie("start-system-namespaces-controller", func(hookContext genericapiserver.PostStartHookContext) error {
|
|
go systemnamespaces.NewController(client, c.ExtraConfig.VersionedInformers.Core().V1().Namespaces()).Run(hookContext.StopCh)
|
|
return nil
|
|
})
|
|
|
|
bootstrapController, err := c.NewBootstrapController(legacyRESTStorage, client)
|
|
if err != nil {
|
|
return fmt.Errorf("error creating bootstrap controller: %v", err)
|
|
}
|
|
m.GenericAPIServer.AddPostStartHookOrDie(controllerName, bootstrapController.PostStartHook)
|
|
m.GenericAPIServer.AddPreShutdownHookOrDie(controllerName, bootstrapController.PreShutdownHook)
|
|
|
|
if err := m.GenericAPIServer.InstallLegacyAPIGroup(genericapiserver.DefaultLegacyAPIPrefix, &apiGroupInfo); err != nil {
|
|
return fmt.Errorf("error in registering group versions: %v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// RESTStorageProvider is a factory type for REST storage.
|
|
type RESTStorageProvider interface {
|
|
GroupName() string
|
|
NewRESTStorage(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter) (genericapiserver.APIGroupInfo, error)
|
|
}
|
|
|
|
// InstallAPIs will install the APIs for the restStorageProviders if they are enabled.
|
|
func (m *Instance) InstallAPIs(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter, restStorageProviders ...RESTStorageProvider) error {
|
|
apiGroupsInfo := []*genericapiserver.APIGroupInfo{}
|
|
|
|
// used later in the loop to filter the served resource by those that have expired.
|
|
resourceExpirationEvaluator, err := genericapiserver.NewResourceExpirationEvaluator(*m.GenericAPIServer.Version)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, restStorageBuilder := range restStorageProviders {
|
|
groupName := restStorageBuilder.GroupName()
|
|
apiGroupInfo, err := restStorageBuilder.NewRESTStorage(apiResourceConfigSource, restOptionsGetter)
|
|
if err != nil {
|
|
return fmt.Errorf("problem initializing API group %q : %v", groupName, err)
|
|
}
|
|
if len(apiGroupInfo.VersionedResourcesStorageMap) == 0 {
|
|
// If we have no storage for any resource configured, this API group is effectively disabled.
|
|
// This can happen when an entire API group, version, or development-stage (alpha, beta, GA) is disabled.
|
|
klog.Infof("API group %q is not enabled, skipping.", groupName)
|
|
continue
|
|
}
|
|
|
|
// Remove resources that serving kinds that are removed.
|
|
// We do this here so that we don't accidentally serve versions without resources or openapi information that for kinds we don't serve.
|
|
// This is a spot above the construction of individual storage handlers so that no sig accidentally forgets to check.
|
|
resourceExpirationEvaluator.RemoveDeletedKinds(groupName, apiGroupInfo.Scheme, apiGroupInfo.VersionedResourcesStorageMap)
|
|
if len(apiGroupInfo.VersionedResourcesStorageMap) == 0 {
|
|
klog.V(1).Infof("Removing API group %v because it is time to stop serving it because it has no versions per APILifecycle.", groupName)
|
|
continue
|
|
}
|
|
|
|
klog.V(1).Infof("Enabling API group %q.", groupName)
|
|
|
|
if postHookProvider, ok := restStorageBuilder.(genericapiserver.PostStartHookProvider); ok {
|
|
name, hook, err := postHookProvider.PostStartHook()
|
|
if err != nil {
|
|
klog.Fatalf("Error building PostStartHook: %v", err)
|
|
}
|
|
m.GenericAPIServer.AddPostStartHookOrDie(name, hook)
|
|
}
|
|
|
|
apiGroupsInfo = append(apiGroupsInfo, &apiGroupInfo)
|
|
}
|
|
|
|
if err := m.GenericAPIServer.InstallAPIGroups(apiGroupsInfo...); err != nil {
|
|
return fmt.Errorf("error in registering group versions: %v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var (
|
|
// stableAPIGroupVersionsEnabledByDefault is a list of our stable versions.
|
|
stableAPIGroupVersionsEnabledByDefault = []schema.GroupVersion{
|
|
admissionregistrationv1.SchemeGroupVersion,
|
|
apiv1.SchemeGroupVersion,
|
|
appsv1.SchemeGroupVersion,
|
|
authenticationv1.SchemeGroupVersion,
|
|
authorizationapiv1.SchemeGroupVersion,
|
|
autoscalingapiv1.SchemeGroupVersion,
|
|
autoscalingapiv2.SchemeGroupVersion,
|
|
batchapiv1.SchemeGroupVersion,
|
|
certificatesapiv1.SchemeGroupVersion,
|
|
coordinationapiv1.SchemeGroupVersion,
|
|
discoveryv1.SchemeGroupVersion,
|
|
eventsv1.SchemeGroupVersion,
|
|
networkingapiv1.SchemeGroupVersion,
|
|
nodev1.SchemeGroupVersion,
|
|
policyapiv1.SchemeGroupVersion,
|
|
rbacv1.SchemeGroupVersion,
|
|
storageapiv1.SchemeGroupVersion,
|
|
schedulingapiv1.SchemeGroupVersion,
|
|
}
|
|
|
|
// legacyBetaEnabledByDefaultResources is the list of beta resources we enable. You may only add to this list
|
|
// if your resource is already enabled by default in a beta level we still serve AND there is no stable API for it.
|
|
// see https://github.com/kubernetes/enhancements/tree/master/keps/sig-architecture/3136-beta-apis-off-by-default
|
|
// for more details.
|
|
legacyBetaEnabledByDefaultResources = []schema.GroupVersionResource{
|
|
flowcontrolv1beta2.SchemeGroupVersion.WithResource("flowschemas"), // remove in 1.29
|
|
flowcontrolv1beta2.SchemeGroupVersion.WithResource("prioritylevelconfigurations"), // remove in 1.29
|
|
flowcontrolv1beta3.SchemeGroupVersion.WithResource("flowschemas"), // deprecate in 1.29, remove in 1.32
|
|
flowcontrolv1beta3.SchemeGroupVersion.WithResource("prioritylevelconfigurations"), // deprecate in 1.29, remove in 1.32
|
|
}
|
|
// betaAPIGroupVersionsDisabledByDefault is for all future beta groupVersions.
|
|
betaAPIGroupVersionsDisabledByDefault = []schema.GroupVersion{
|
|
authenticationv1beta1.SchemeGroupVersion,
|
|
autoscalingapiv2beta1.SchemeGroupVersion,
|
|
autoscalingapiv2beta2.SchemeGroupVersion,
|
|
batchapiv1beta1.SchemeGroupVersion,
|
|
discoveryv1beta1.SchemeGroupVersion,
|
|
eventsv1beta1.SchemeGroupVersion,
|
|
nodev1beta1.SchemeGroupVersion, // remove in 1.26
|
|
policyapiv1beta1.SchemeGroupVersion,
|
|
storageapiv1beta1.SchemeGroupVersion,
|
|
flowcontrolv1beta1.SchemeGroupVersion,
|
|
flowcontrolv1beta2.SchemeGroupVersion,
|
|
flowcontrolv1beta3.SchemeGroupVersion,
|
|
}
|
|
|
|
// alphaAPIGroupVersionsDisabledByDefault holds the alpha APIs we have. They are always disabled by default.
|
|
alphaAPIGroupVersionsDisabledByDefault = []schema.GroupVersion{
|
|
admissionregistrationv1alpha1.SchemeGroupVersion,
|
|
apiserverinternalv1alpha1.SchemeGroupVersion,
|
|
authenticationv1alpha1.SchemeGroupVersion,
|
|
resourcev1alpha2.SchemeGroupVersion,
|
|
certificatesv1alpha1.SchemeGroupVersion,
|
|
networkingapiv1alpha1.SchemeGroupVersion,
|
|
storageapiv1alpha1.SchemeGroupVersion,
|
|
flowcontrolv1alpha1.SchemeGroupVersion,
|
|
}
|
|
)
|
|
|
|
// DefaultAPIResourceConfigSource returns default configuration for an APIResource.
|
|
func DefaultAPIResourceConfigSource() *serverstorage.ResourceConfig {
|
|
ret := serverstorage.NewResourceConfig()
|
|
// NOTE: GroupVersions listed here will be enabled by default. Don't put alpha or beta versions in the list.
|
|
ret.EnableVersions(stableAPIGroupVersionsEnabledByDefault...)
|
|
|
|
// disable alpha and beta versions explicitly so we have a full list of what's possible to serve
|
|
ret.DisableVersions(betaAPIGroupVersionsDisabledByDefault...)
|
|
ret.DisableVersions(alphaAPIGroupVersionsDisabledByDefault...)
|
|
|
|
// enable the legacy beta resources that were present before stopped serving new beta APIs by default.
|
|
ret.EnableResources(legacyBetaEnabledByDefaultResources...)
|
|
|
|
return ret
|
|
}
|