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Merge pull request #106883 from calvin0327/move-well-know-systemConstant

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kubeadm: move well-known system constants to constants.go
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Kubernetes Prow Robot 2022-02-01 17:28:21 -08:00 committed by GitHub
commit f11dbaea2f
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4 changed files with 44 additions and 54 deletions
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3
cmd/kubeadm/app/apis/output/fuzzer/fuzzer.go
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@ -26,6 +26,7 @@ import (
bootstraptokenv1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/bootstraptoken/v1"
"k8s.io/kubernetes/cmd/kubeadm/app/apis/output"
"k8s.io/kubernetes/cmd/kubeadm/app/constants"
)
// Funcs returns the fuzzer functions for the kubeadm apis.
@ -42,5 +43,5 @@ func fuzzBootstrapToken(obj *output.BootstrapToken, c fuzz.Continue) {
obj.Description = ""
obj.TTL = &metav1.Duration{Duration: time.Hour * 24}
obj.Usages = []string{"authentication", "signing"}
obj.Groups = []string{"system:bootstrappers:kubeadm:default-node-token"}
obj.Groups = []string{constants.NodeBootstrapTokenAuthGroup}
}

45
cmd/kubeadm/app/constants/constants.go
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@ -160,24 +160,52 @@ const (
// SchedulerKubeConfigFileName defines the file name for the scheduler's kubeconfig file
SchedulerKubeConfigFileName = "scheduler.conf"
// Some well-known users and groups in the core Kubernetes authorization system
// Some well-known users, groups, roles and clusterrolebindings in the core Kubernetes authorization system
// ControllerManagerUser defines the well-known user the controller-manager should be authenticated as
ControllerManagerUser = "system:kube-controller-manager"
// SchedulerUser defines the well-known user the scheduler should be authenticated as
SchedulerUser = "system:kube-scheduler"
// NodesUserPrefix defines the user name prefix as requested by the Node authorizer.
NodesUserPrefix = "system:node:"
// SystemPrivilegedGroup defines the well-known group for the apiservers. This group is also superuser by default
// (i.e. bound to the cluster-admin ClusterRole)
SystemPrivilegedGroup = "system:masters"
// NodesGroup defines the well-known group for all nodes.
NodesGroup = "system:nodes"
// NodesUserPrefix defines the user name prefix as requested by the Node authorizer.
NodesUserPrefix = "system:node:"
// NodeBootstrapTokenAuthGroup specifies which group a Node Bootstrap Token should be authenticated in
NodeBootstrapTokenAuthGroup = "system:bootstrappers:kubeadm:default-node-token"
// KubeProxyClusterRoleName sets the name for the kube-proxy ClusterRole
KubeProxyClusterRoleName = "system:node-proxier"
// NodeBootstrapperClusterRoleName defines the name of the auto-bootstrapped ClusterRole for letting someone post a CSR
NodeBootstrapperClusterRoleName = "system:node-bootstrapper"
// CSRAutoApprovalClusterRoleName defines the name of the auto-bootstrapped ClusterRole for making the csrapprover controller auto-approve the CSR
// Starting from v1.8, CSRAutoApprovalClusterRoleName is automatically created by the API server on startup
CSRAutoApprovalClusterRoleName = "system:certificates.k8s.io:certificatesigningrequests:nodeclient"
// NodeSelfCSRAutoApprovalClusterRoleName is a role defined in default 1.8 RBAC policies for automatic CSR approvals for automatically rotated node certificates
NodeSelfCSRAutoApprovalClusterRoleName = "system:certificates.k8s.io:certificatesigningrequests:selfnodeclient"
// NodesClusterRoleBinding defines the well-known ClusterRoleBinding which binds the too permissive system:node
// ClusterRole to the system:nodes group. Since kubeadm is using the Node Authorizer, this ClusterRoleBinding's
// system:nodes group subject is removed if present.
NodesClusterRoleBinding = "system:node"
// KubeletBaseConfigMapRolePrefix defines the base kubelet configuration ConfigMap.
// TODO: Remove once UnversionedKubeletConfigMap graduates to GA:
// https://github.com/kubernetes/kubeadm/issues/1582
KubeletBaseConfigMapRolePrefix = "kubeadm:kubelet-config-"
// KubeletBaseConfigMapRolePrefix defines the base kubelet configuration ConfigMap.
KubeletBaseConfigMapRole = "kubeadm:kubelet-config"
// KubeProxyClusterRoleBindingName sets the name for the kube-proxy CluterRoleBinding
KubeProxyClusterRoleBindingName = "kubeadm:node-proxier"
// NodeKubeletBootstrap defines the name of the ClusterRoleBinding that lets kubelets post CSRs
NodeKubeletBootstrap = "kubeadm:kubelet-bootstrap"
// GetNodesClusterRoleName defines the name of the ClusterRole and ClusterRoleBinding to get nodes
GetNodesClusterRoleName = "kubeadm:get-nodes"
// NodeAutoApproveBootstrapClusterRoleBinding defines the name of the ClusterRoleBinding that makes the csrapprover approve node CSRs
NodeAutoApproveBootstrapClusterRoleBinding = "kubeadm:node-autoapprove-bootstrap"
// NodeAutoApproveCertificateRotationClusterRoleBinding defines name of the ClusterRoleBinding that makes the csrapprover approve node auto rotated CSRs
NodeAutoApproveCertificateRotationClusterRoleBinding = "kubeadm:node-autoapprove-certificate-rotation"
// APICallRetryInterval defines how long kubeadm should wait before retrying a failed API operation
APICallRetryInterval = 500 * time.Millisecond
// DiscoveryRetryInterval specifies how long kubeadm should wait before retrying to connect to the control-plane when doing discovery
@ -269,14 +297,6 @@ const (
// KubeletBaseConfigurationConfigMapKey specifies in what ConfigMap key the initial remote configuration of kubelet should be stored
KubeletBaseConfigurationConfigMapKey = "kubelet"
// KubeletBaseConfigMapRolePrefix defines the base kubelet configuration ConfigMap.
// TODO: Remove once UnversionedKubeletConfigMap graduates to GA:
// https://github.com/kubernetes/kubeadm/issues/1582
KubeletBaseConfigMapRolePrefix = "kubeadm:kubelet-config-"
// KubeletBaseConfigMapRolePrefix defines the base kubelet configuration ConfigMap.
KubeletBaseConfigMapRole = "kubeadm:kubelet-config"
// KubeletRunDirectory specifies the directory where the kubelet runtime information is stored.
KubeletRunDirectory = "/var/lib/kubelet"
@ -323,9 +343,6 @@ const (
// KubeConfigVolumeName specifies the name for the Volume that is used for injecting the kubeconfig to talk securely to the api server for a control plane component if applicable
KubeConfigVolumeName = "kubeconfig"
// NodeBootstrapTokenAuthGroup specifies which group a Node Bootstrap Token should be authenticated in
NodeBootstrapTokenAuthGroup = "system:bootstrappers:kubeadm:default-node-token"
// DefaultCIImageRepository points to image registry where CI uploads images from ci build job
DefaultCIImageRepository = "gcr.io/k8s-staging-ci-images"

11
cmd/kubeadm/app/phases/addons/proxy/proxy.go
View File

@ -39,13 +39,6 @@ import (
)
const (
// KubeProxyClusterRoleName sets the name for the kube-proxy ClusterRole
// TODO: This k8s-generic, well-known constant should be fetchable from another source, not be in this package
KubeProxyClusterRoleName = "system:node-proxier"
// KubeProxyClusterRoleBindingName sets the name for the kube-proxy CluterRoleBinding
KubeProxyClusterRoleBindingName = "kubeadm:node-proxier"
// KubeProxyServiceAccountName describes the name of the ServiceAccount for the kube-proxy addon
KubeProxyServiceAccountName = "kube-proxy"
@ -163,12 +156,12 @@ func createKubeProxyAddon(cfg *kubeadmapi.ClusterConfiguration, client clientset
func createClusterRoleBindings(client clientset.Interface) error {
if err := apiclient.CreateOrUpdateClusterRoleBinding(client, &rbac.ClusterRoleBinding{
ObjectMeta: metav1.ObjectMeta{
Name: KubeProxyClusterRoleBindingName,
Name: constants.KubeProxyClusterRoleBindingName,
},
RoleRef: rbac.RoleRef{
APIGroup: rbac.GroupName,
Kind: "ClusterRole",
Name: KubeProxyClusterRoleName,
Name: constants.KubeProxyClusterRoleName,
},
Subjects: []rbac.Subject{
{

39
cmd/kubeadm/app/phases/bootstraptoken/node/tlsbootstrap.go
View File

@ -27,39 +27,18 @@ import (
"k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient"
)
const (
// NodeBootstrapperClusterRoleName defines the name of the auto-bootstrapped ClusterRole for letting someone post a CSR
// TODO: This value should be defined in an other, generic authz package instead of here
NodeBootstrapperClusterRoleName = "system:node-bootstrapper"
// NodeKubeletBootstrap defines the name of the ClusterRoleBinding that lets kubelets post CSRs
NodeKubeletBootstrap = "kubeadm:kubelet-bootstrap"
// GetNodesClusterRoleName defines the name of the ClusterRole and ClusterRoleBinding to get nodes
GetNodesClusterRoleName = "kubeadm:get-nodes"
// CSRAutoApprovalClusterRoleName defines the name of the auto-bootstrapped ClusterRole for making the csrapprover controller auto-approve the CSR
// TODO: This value should be defined in an other, generic authz package instead of here
// Starting from v1.8, CSRAutoApprovalClusterRoleName is automatically created by the API server on startup
CSRAutoApprovalClusterRoleName = "system:certificates.k8s.io:certificatesigningrequests:nodeclient"
// NodeSelfCSRAutoApprovalClusterRoleName is a role defined in default 1.8 RBAC policies for automatic CSR approvals for automatically rotated node certificates
NodeSelfCSRAutoApprovalClusterRoleName = "system:certificates.k8s.io:certificatesigningrequests:selfnodeclient"
// NodeAutoApproveBootstrapClusterRoleBinding defines the name of the ClusterRoleBinding that makes the csrapprover approve node CSRs
NodeAutoApproveBootstrapClusterRoleBinding = "kubeadm:node-autoapprove-bootstrap"
// NodeAutoApproveCertificateRotationClusterRoleBinding defines name of the ClusterRoleBinding that makes the csrapprover approve node auto rotated CSRs
NodeAutoApproveCertificateRotationClusterRoleBinding = "kubeadm:node-autoapprove-certificate-rotation"
)
// AllowBootstrapTokensToPostCSRs creates RBAC rules in a way the makes Node Bootstrap Tokens able to post CSRs
func AllowBootstrapTokensToPostCSRs(client clientset.Interface) error {
fmt.Println("[bootstrap-token] Configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials")
return apiclient.CreateOrUpdateClusterRoleBinding(client, &rbac.ClusterRoleBinding{
ObjectMeta: metav1.ObjectMeta{
Name: NodeKubeletBootstrap,
Name: constants.NodeKubeletBootstrap,
},
RoleRef: rbac.RoleRef{
APIGroup: rbac.GroupName,
Kind: "ClusterRole",
Name: NodeBootstrapperClusterRoleName,
Name: constants.NodeBootstrapperClusterRoleName,
},
Subjects: []rbac.Subject{
{
@ -76,7 +55,7 @@ func AllowBoostrapTokensToGetNodes(client clientset.Interface) error {
if err := apiclient.CreateOrUpdateClusterRole(client, &rbac.ClusterRole{
ObjectMeta: metav1.ObjectMeta{
Name: GetNodesClusterRoleName,
Name: constants.GetNodesClusterRoleName,
Namespace: metav1.NamespaceSystem,
},
Rules: []rbac.PolicyRule{
@ -92,13 +71,13 @@ func AllowBoostrapTokensToGetNodes(client clientset.Interface) error {
return apiclient.CreateOrUpdateClusterRoleBinding(client, &rbac.ClusterRoleBinding{
ObjectMeta: metav1.ObjectMeta{
Name: GetNodesClusterRoleName,
Name: constants.GetNodesClusterRoleName,
Namespace: metav1.NamespaceSystem,
},
RoleRef: rbac.RoleRef{
APIGroup: rbac.GroupName,
Kind: "ClusterRole",
Name: GetNodesClusterRoleName,
Name: constants.GetNodesClusterRoleName,
},
Subjects: []rbac.Subject{
{
@ -116,12 +95,12 @@ func AutoApproveNodeBootstrapTokens(client clientset.Interface) error {
// Always create this kubeadm-specific binding though
return apiclient.CreateOrUpdateClusterRoleBinding(client, &rbac.ClusterRoleBinding{
ObjectMeta: metav1.ObjectMeta{
Name: NodeAutoApproveBootstrapClusterRoleBinding,
Name: constants.NodeAutoApproveBootstrapClusterRoleBinding,
},
RoleRef: rbac.RoleRef{
APIGroup: rbac.GroupName,
Kind: "ClusterRole",
Name: CSRAutoApprovalClusterRoleName,
Name: constants.CSRAutoApprovalClusterRoleName,
},
Subjects: []rbac.Subject{
{
@ -138,12 +117,12 @@ func AutoApproveNodeCertificateRotation(client clientset.Interface) error {
return apiclient.CreateOrUpdateClusterRoleBinding(client, &rbac.ClusterRoleBinding{
ObjectMeta: metav1.ObjectMeta{
Name: NodeAutoApproveCertificateRotationClusterRoleBinding,
Name: constants.NodeAutoApproveCertificateRotationClusterRoleBinding,
},
RoleRef: rbac.RoleRef{
APIGroup: rbac.GroupName,
Kind: "ClusterRole",
Name: NodeSelfCSRAutoApprovalClusterRoleName,
Name: constants.NodeSelfCSRAutoApprovalClusterRoleName,
},
Subjects: []rbac.Subject{
{