mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-10 08:20:23 +00:00
280 lines
10 KiB
Go
280 lines
10 KiB
Go
/*
|
|
Copyright 2014 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package clientcmd
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"reflect"
|
|
"strings"
|
|
|
|
utilerrors "k8s.io/apimachinery/pkg/util/errors"
|
|
"k8s.io/apimachinery/pkg/util/validation"
|
|
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
|
|
)
|
|
|
|
var (
|
|
ErrNoContext = errors.New("no context chosen")
|
|
ErrEmptyConfig = errors.New("no configuration has been provided")
|
|
// message is for consistency with old behavior
|
|
ErrEmptyCluster = errors.New("cluster has no server defined")
|
|
)
|
|
|
|
type errContextNotFound struct {
|
|
ContextName string
|
|
}
|
|
|
|
func (e *errContextNotFound) Error() string {
|
|
return fmt.Sprintf("context was not found for specified context: %v", e.ContextName)
|
|
}
|
|
|
|
// IsContextNotFound returns a boolean indicating whether the error is known to
|
|
// report that a context was not found
|
|
func IsContextNotFound(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
if _, ok := err.(*errContextNotFound); ok || err == ErrNoContext {
|
|
return true
|
|
}
|
|
return strings.Contains(err.Error(), "context was not found for specified context")
|
|
}
|
|
|
|
// IsEmptyConfig returns true if the provided error indicates the provided configuration
|
|
// is empty.
|
|
func IsEmptyConfig(err error) bool {
|
|
switch t := err.(type) {
|
|
case errConfigurationInvalid:
|
|
return len(t) == 1 && t[0] == ErrEmptyConfig
|
|
}
|
|
return err == ErrEmptyConfig
|
|
}
|
|
|
|
// errConfigurationInvalid is a set of errors indicating the configuration is invalid.
|
|
type errConfigurationInvalid []error
|
|
|
|
// errConfigurationInvalid implements error and Aggregate
|
|
var _ error = errConfigurationInvalid{}
|
|
var _ utilerrors.Aggregate = errConfigurationInvalid{}
|
|
|
|
func newErrConfigurationInvalid(errs []error) error {
|
|
switch len(errs) {
|
|
case 0:
|
|
return nil
|
|
default:
|
|
return errConfigurationInvalid(errs)
|
|
}
|
|
}
|
|
|
|
// Error implements the error interface
|
|
func (e errConfigurationInvalid) Error() string {
|
|
return fmt.Sprintf("invalid configuration: %v", utilerrors.NewAggregate(e).Error())
|
|
}
|
|
|
|
// Errors implements the AggregateError interface
|
|
func (e errConfigurationInvalid) Errors() []error {
|
|
return e
|
|
}
|
|
|
|
// IsConfigurationInvalid returns true if the provided error indicates the configuration is invalid.
|
|
func IsConfigurationInvalid(err error) bool {
|
|
switch err.(type) {
|
|
case *errContextNotFound, errConfigurationInvalid:
|
|
return true
|
|
}
|
|
return IsContextNotFound(err)
|
|
}
|
|
|
|
// Validate checks for errors in the Config. It does not return early so that it can find as many errors as possible.
|
|
func Validate(config clientcmdapi.Config) error {
|
|
validationErrors := make([]error, 0)
|
|
|
|
if clientcmdapi.IsConfigEmpty(&config) {
|
|
return newErrConfigurationInvalid([]error{ErrEmptyConfig})
|
|
}
|
|
|
|
if len(config.CurrentContext) != 0 {
|
|
if _, exists := config.Contexts[config.CurrentContext]; !exists {
|
|
validationErrors = append(validationErrors, &errContextNotFound{config.CurrentContext})
|
|
}
|
|
}
|
|
|
|
for contextName, context := range config.Contexts {
|
|
validationErrors = append(validationErrors, validateContext(contextName, *context, config)...)
|
|
}
|
|
|
|
for authInfoName, authInfo := range config.AuthInfos {
|
|
validationErrors = append(validationErrors, validateAuthInfo(authInfoName, *authInfo)...)
|
|
}
|
|
|
|
for clusterName, clusterInfo := range config.Clusters {
|
|
validationErrors = append(validationErrors, validateClusterInfo(clusterName, *clusterInfo)...)
|
|
}
|
|
|
|
return newErrConfigurationInvalid(validationErrors)
|
|
}
|
|
|
|
// ConfirmUsable looks a particular context and determines if that particular part of the config is useable. There might still be errors in the config,
|
|
// but no errors in the sections requested or referenced. It does not return early so that it can find as many errors as possible.
|
|
func ConfirmUsable(config clientcmdapi.Config, passedContextName string) error {
|
|
validationErrors := make([]error, 0)
|
|
|
|
if clientcmdapi.IsConfigEmpty(&config) {
|
|
return newErrConfigurationInvalid([]error{ErrEmptyConfig})
|
|
}
|
|
|
|
var contextName string
|
|
if len(passedContextName) != 0 {
|
|
contextName = passedContextName
|
|
} else {
|
|
contextName = config.CurrentContext
|
|
}
|
|
|
|
if len(contextName) == 0 {
|
|
return ErrNoContext
|
|
}
|
|
|
|
context, exists := config.Contexts[contextName]
|
|
if !exists {
|
|
validationErrors = append(validationErrors, &errContextNotFound{contextName})
|
|
}
|
|
|
|
if exists {
|
|
validationErrors = append(validationErrors, validateContext(contextName, *context, config)...)
|
|
validationErrors = append(validationErrors, validateAuthInfo(context.AuthInfo, *config.AuthInfos[context.AuthInfo])...)
|
|
validationErrors = append(validationErrors, validateClusterInfo(context.Cluster, *config.Clusters[context.Cluster])...)
|
|
}
|
|
|
|
return newErrConfigurationInvalid(validationErrors)
|
|
}
|
|
|
|
// validateClusterInfo looks for conflicts and errors in the cluster info
|
|
func validateClusterInfo(clusterName string, clusterInfo clientcmdapi.Cluster) []error {
|
|
validationErrors := make([]error, 0)
|
|
|
|
emptyCluster := clientcmdapi.NewCluster()
|
|
if reflect.DeepEqual(*emptyCluster, clusterInfo) {
|
|
return []error{ErrEmptyCluster}
|
|
}
|
|
|
|
if len(clusterInfo.Server) == 0 {
|
|
if len(clusterName) == 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("default cluster has no server defined"))
|
|
} else {
|
|
validationErrors = append(validationErrors, fmt.Errorf("no server found for cluster %q", clusterName))
|
|
}
|
|
}
|
|
// Make sure CA data and CA file aren't both specified
|
|
if len(clusterInfo.CertificateAuthority) != 0 && len(clusterInfo.CertificateAuthorityData) != 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("certificate-authority-data and certificate-authority are both specified for %v. certificate-authority-data will override.", clusterName))
|
|
}
|
|
if len(clusterInfo.CertificateAuthority) != 0 {
|
|
clientCertCA, err := os.Open(clusterInfo.CertificateAuthority)
|
|
defer clientCertCA.Close()
|
|
if err != nil {
|
|
validationErrors = append(validationErrors, fmt.Errorf("unable to read certificate-authority %v for %v due to %v", clusterInfo.CertificateAuthority, clusterName, err))
|
|
}
|
|
}
|
|
|
|
return validationErrors
|
|
}
|
|
|
|
// validateAuthInfo looks for conflicts and errors in the auth info
|
|
func validateAuthInfo(authInfoName string, authInfo clientcmdapi.AuthInfo) []error {
|
|
validationErrors := make([]error, 0)
|
|
|
|
usingAuthPath := false
|
|
methods := make([]string, 0, 3)
|
|
if len(authInfo.Token) != 0 {
|
|
methods = append(methods, "token")
|
|
}
|
|
if len(authInfo.Username) != 0 || len(authInfo.Password) != 0 {
|
|
methods = append(methods, "basicAuth")
|
|
}
|
|
|
|
if len(authInfo.ClientCertificate) != 0 || len(authInfo.ClientCertificateData) != 0 {
|
|
// Make sure cert data and file aren't both specified
|
|
if len(authInfo.ClientCertificate) != 0 && len(authInfo.ClientCertificateData) != 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("client-cert-data and client-cert are both specified for %v. client-cert-data will override.", authInfoName))
|
|
}
|
|
// Make sure key data and file aren't both specified
|
|
if len(authInfo.ClientKey) != 0 && len(authInfo.ClientKeyData) != 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("client-key-data and client-key are both specified for %v; client-key-data will override", authInfoName))
|
|
}
|
|
// Make sure a key is specified
|
|
if len(authInfo.ClientKey) == 0 && len(authInfo.ClientKeyData) == 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("client-key-data or client-key must be specified for %v to use the clientCert authentication method.", authInfoName))
|
|
}
|
|
|
|
if len(authInfo.ClientCertificate) != 0 {
|
|
clientCertFile, err := os.Open(authInfo.ClientCertificate)
|
|
defer clientCertFile.Close()
|
|
if err != nil {
|
|
validationErrors = append(validationErrors, fmt.Errorf("unable to read client-cert %v for %v due to %v", authInfo.ClientCertificate, authInfoName, err))
|
|
}
|
|
}
|
|
if len(authInfo.ClientKey) != 0 {
|
|
clientKeyFile, err := os.Open(authInfo.ClientKey)
|
|
defer clientKeyFile.Close()
|
|
if err != nil {
|
|
validationErrors = append(validationErrors, fmt.Errorf("unable to read client-key %v for %v due to %v", authInfo.ClientKey, authInfoName, err))
|
|
}
|
|
}
|
|
}
|
|
|
|
// authPath also provides information for the client to identify the server, so allow multiple auth methods in that case
|
|
if (len(methods) > 1) && (!usingAuthPath) {
|
|
validationErrors = append(validationErrors, fmt.Errorf("more than one authentication method found for %v; found %v, only one is allowed", authInfoName, methods))
|
|
}
|
|
|
|
// ImpersonateGroups or ImpersonateUserExtra should be requested with a user
|
|
if (len(authInfo.ImpersonateGroups) > 0 || len(authInfo.ImpersonateUserExtra) > 0) && (len(authInfo.Impersonate) == 0) {
|
|
validationErrors = append(validationErrors, fmt.Errorf("requesting groups or user-extra for %v without impersonating a user", authInfoName))
|
|
}
|
|
return validationErrors
|
|
}
|
|
|
|
// validateContext looks for errors in the context. It is not transitive, so errors in the reference authInfo or cluster configs are not included in this return
|
|
func validateContext(contextName string, context clientcmdapi.Context, config clientcmdapi.Config) []error {
|
|
validationErrors := make([]error, 0)
|
|
|
|
if len(contextName) == 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("empty context name for %#v is not allowed", context))
|
|
}
|
|
|
|
if len(context.AuthInfo) == 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("user was not specified for context %q", contextName))
|
|
} else if _, exists := config.AuthInfos[context.AuthInfo]; !exists {
|
|
validationErrors = append(validationErrors, fmt.Errorf("user %q was not found for context %q", context.AuthInfo, contextName))
|
|
}
|
|
|
|
if len(context.Cluster) == 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("cluster was not specified for context %q", contextName))
|
|
} else if _, exists := config.Clusters[context.Cluster]; !exists {
|
|
validationErrors = append(validationErrors, fmt.Errorf("cluster %q was not found for context %q", context.Cluster, contextName))
|
|
}
|
|
|
|
if len(context.Namespace) != 0 {
|
|
if len(validation.IsDNS1123Label(context.Namespace)) != 0 {
|
|
validationErrors = append(validationErrors, fmt.Errorf("namespace %q for context %q does not conform to the kubernetes DNS_LABEL rules", context.Namespace, contextName))
|
|
}
|
|
}
|
|
|
|
return validationErrors
|
|
}
|