mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-25 06:20:24 +00:00
358 lines
12 KiB
Go
358 lines
12 KiB
Go
/*
|
|
Copyright 2018 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 genericclioptions
|
|
|
|
import (
|
|
"os"
|
|
"path/filepath"
|
|
"regexp"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/spf13/pflag"
|
|
|
|
"k8s.io/apimachinery/pkg/api/meta"
|
|
"k8s.io/client-go/discovery"
|
|
diskcached "k8s.io/client-go/discovery/cached/disk"
|
|
"k8s.io/client-go/rest"
|
|
"k8s.io/client-go/restmapper"
|
|
"k8s.io/client-go/tools/clientcmd"
|
|
"k8s.io/client-go/util/homedir"
|
|
)
|
|
|
|
const (
|
|
flagClusterName = "cluster"
|
|
flagAuthInfoName = "user"
|
|
flagContext = "context"
|
|
flagNamespace = "namespace"
|
|
flagAPIServer = "server"
|
|
flagInsecure = "insecure-skip-tls-verify"
|
|
flagCertFile = "client-certificate"
|
|
flagKeyFile = "client-key"
|
|
flagCAFile = "certificate-authority"
|
|
flagBearerToken = "token"
|
|
flagImpersonate = "as"
|
|
flagImpersonateGroup = "as-group"
|
|
flagUsername = "username"
|
|
flagPassword = "password"
|
|
flagTimeout = "request-timeout"
|
|
flagHTTPCacheDir = "cache-dir"
|
|
)
|
|
|
|
var defaultCacheDir = filepath.Join(homedir.HomeDir(), ".kube", "http-cache")
|
|
|
|
// RESTClientGetter is an interface that the ConfigFlags describe to provide an easier way to mock for commands
|
|
// and eliminate the direct coupling to a struct type. Users may wish to duplicate this type in their own packages
|
|
// as per the golang type overlapping.
|
|
type RESTClientGetter interface {
|
|
// ToRESTConfig returns restconfig
|
|
ToRESTConfig() (*rest.Config, error)
|
|
// ToDiscoveryClient returns discovery client
|
|
ToDiscoveryClient() (discovery.CachedDiscoveryInterface, error)
|
|
// ToRESTMapper returns a restmapper
|
|
ToRESTMapper() (meta.RESTMapper, error)
|
|
// ToRawKubeConfigLoader return kubeconfig loader as-is
|
|
ToRawKubeConfigLoader() clientcmd.ClientConfig
|
|
}
|
|
|
|
var _ RESTClientGetter = &ConfigFlags{}
|
|
|
|
// ConfigFlags composes the set of values necessary
|
|
// for obtaining a REST client config
|
|
type ConfigFlags struct {
|
|
CacheDir *string
|
|
KubeConfig *string
|
|
|
|
// config flags
|
|
ClusterName *string
|
|
AuthInfoName *string
|
|
Context *string
|
|
Namespace *string
|
|
APIServer *string
|
|
Insecure *bool
|
|
CertFile *string
|
|
KeyFile *string
|
|
CAFile *string
|
|
BearerToken *string
|
|
Impersonate *string
|
|
ImpersonateGroup *[]string
|
|
Username *string
|
|
Password *string
|
|
Timeout *string
|
|
|
|
clientConfig clientcmd.ClientConfig
|
|
lock sync.Mutex
|
|
// If set to true, will use persistent client config and
|
|
// propagate the config to the places that need it, rather than
|
|
// loading the config multiple times
|
|
usePersistentConfig bool
|
|
}
|
|
|
|
// ToRESTConfig implements RESTClientGetter.
|
|
// Returns a REST client configuration based on a provided path
|
|
// to a .kubeconfig file, loading rules, and config flag overrides.
|
|
// Expects the AddFlags method to have been called.
|
|
func (f *ConfigFlags) ToRESTConfig() (*rest.Config, error) {
|
|
return f.ToRawKubeConfigLoader().ClientConfig()
|
|
}
|
|
|
|
// ToRawKubeConfigLoader binds config flag values to config overrides
|
|
// Returns an interactive clientConfig if the password flag is enabled,
|
|
// or a non-interactive clientConfig otherwise.
|
|
func (f *ConfigFlags) ToRawKubeConfigLoader() clientcmd.ClientConfig {
|
|
if f.usePersistentConfig {
|
|
return f.toRawKubePersistentConfigLoader()
|
|
}
|
|
return f.toRawKubeConfigLoader()
|
|
}
|
|
|
|
func (f *ConfigFlags) toRawKubeConfigLoader() clientcmd.ClientConfig {
|
|
loadingRules := clientcmd.NewDefaultClientConfigLoadingRules()
|
|
// use the standard defaults for this client command
|
|
// DEPRECATED: remove and replace with something more accurate
|
|
loadingRules.DefaultClientConfig = &clientcmd.DefaultClientConfig
|
|
|
|
if f.KubeConfig != nil {
|
|
loadingRules.ExplicitPath = *f.KubeConfig
|
|
}
|
|
|
|
overrides := &clientcmd.ConfigOverrides{ClusterDefaults: clientcmd.ClusterDefaults}
|
|
|
|
// bind auth info flag values to overrides
|
|
if f.CertFile != nil {
|
|
overrides.AuthInfo.ClientCertificate = *f.CertFile
|
|
}
|
|
if f.KeyFile != nil {
|
|
overrides.AuthInfo.ClientKey = *f.KeyFile
|
|
}
|
|
if f.BearerToken != nil {
|
|
overrides.AuthInfo.Token = *f.BearerToken
|
|
}
|
|
if f.Impersonate != nil {
|
|
overrides.AuthInfo.Impersonate = *f.Impersonate
|
|
}
|
|
if f.ImpersonateGroup != nil {
|
|
overrides.AuthInfo.ImpersonateGroups = *f.ImpersonateGroup
|
|
}
|
|
if f.Username != nil {
|
|
overrides.AuthInfo.Username = *f.Username
|
|
}
|
|
if f.Password != nil {
|
|
overrides.AuthInfo.Password = *f.Password
|
|
}
|
|
|
|
// bind cluster flags
|
|
if f.APIServer != nil {
|
|
overrides.ClusterInfo.Server = *f.APIServer
|
|
}
|
|
if f.CAFile != nil {
|
|
overrides.ClusterInfo.CertificateAuthority = *f.CAFile
|
|
}
|
|
if f.Insecure != nil {
|
|
overrides.ClusterInfo.InsecureSkipTLSVerify = *f.Insecure
|
|
}
|
|
|
|
// bind context flags
|
|
if f.Context != nil {
|
|
overrides.CurrentContext = *f.Context
|
|
}
|
|
if f.ClusterName != nil {
|
|
overrides.Context.Cluster = *f.ClusterName
|
|
}
|
|
if f.AuthInfoName != nil {
|
|
overrides.Context.AuthInfo = *f.AuthInfoName
|
|
}
|
|
if f.Namespace != nil {
|
|
overrides.Context.Namespace = *f.Namespace
|
|
}
|
|
|
|
if f.Timeout != nil {
|
|
overrides.Timeout = *f.Timeout
|
|
}
|
|
|
|
var clientConfig clientcmd.ClientConfig
|
|
|
|
// we only have an interactive prompt when a password is allowed
|
|
if f.Password == nil {
|
|
clientConfig = clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, overrides)
|
|
} else {
|
|
clientConfig = clientcmd.NewInteractiveDeferredLoadingClientConfig(loadingRules, overrides, os.Stdin)
|
|
}
|
|
|
|
return clientConfig
|
|
}
|
|
|
|
// toRawKubePersistentConfigLoader binds config flag values to config overrides
|
|
// Returns a persistent clientConfig for propagation.
|
|
func (f *ConfigFlags) toRawKubePersistentConfigLoader() clientcmd.ClientConfig {
|
|
f.lock.Lock()
|
|
defer f.lock.Unlock()
|
|
|
|
if f.clientConfig == nil {
|
|
f.clientConfig = f.toRawKubeConfigLoader()
|
|
}
|
|
|
|
return f.clientConfig
|
|
}
|
|
|
|
// ToDiscoveryClient implements RESTClientGetter.
|
|
// Expects the AddFlags method to have been called.
|
|
// Returns a CachedDiscoveryInterface using a computed RESTConfig.
|
|
func (f *ConfigFlags) ToDiscoveryClient() (discovery.CachedDiscoveryInterface, error) {
|
|
config, err := f.ToRESTConfig()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// The more groups you have, the more discovery requests you need to make.
|
|
// given 25 groups (our groups + a few custom resources) with one-ish version each, discovery needs to make 50 requests
|
|
// double it just so we don't end up here again for a while. This config is only used for discovery.
|
|
config.Burst = 100
|
|
|
|
// retrieve a user-provided value for the "cache-dir"
|
|
// defaulting to ~/.kube/http-cache if no user-value is given.
|
|
httpCacheDir := defaultCacheDir
|
|
if f.CacheDir != nil {
|
|
httpCacheDir = *f.CacheDir
|
|
}
|
|
|
|
discoveryCacheDir := computeDiscoverCacheDir(filepath.Join(homedir.HomeDir(), ".kube", "cache", "discovery"), config.Host)
|
|
return diskcached.NewCachedDiscoveryClientForConfig(config, discoveryCacheDir, httpCacheDir, time.Duration(10*time.Minute))
|
|
}
|
|
|
|
// ToRESTMapper returns a mapper.
|
|
func (f *ConfigFlags) ToRESTMapper() (meta.RESTMapper, error) {
|
|
discoveryClient, err := f.ToDiscoveryClient()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
mapper := restmapper.NewDeferredDiscoveryRESTMapper(discoveryClient)
|
|
expander := restmapper.NewShortcutExpander(mapper, discoveryClient)
|
|
return expander, nil
|
|
}
|
|
|
|
// AddFlags binds client configuration flags to a given flagset
|
|
func (f *ConfigFlags) AddFlags(flags *pflag.FlagSet) {
|
|
if f.KubeConfig != nil {
|
|
flags.StringVar(f.KubeConfig, "kubeconfig", *f.KubeConfig, "Path to the kubeconfig file to use for CLI requests.")
|
|
}
|
|
if f.CacheDir != nil {
|
|
flags.StringVar(f.CacheDir, flagHTTPCacheDir, *f.CacheDir, "Default HTTP cache directory")
|
|
}
|
|
|
|
// add config options
|
|
if f.CertFile != nil {
|
|
flags.StringVar(f.CertFile, flagCertFile, *f.CertFile, "Path to a client certificate file for TLS")
|
|
}
|
|
if f.KeyFile != nil {
|
|
flags.StringVar(f.KeyFile, flagKeyFile, *f.KeyFile, "Path to a client key file for TLS")
|
|
}
|
|
if f.BearerToken != nil {
|
|
flags.StringVar(f.BearerToken, flagBearerToken, *f.BearerToken, "Bearer token for authentication to the API server")
|
|
}
|
|
if f.Impersonate != nil {
|
|
flags.StringVar(f.Impersonate, flagImpersonate, *f.Impersonate, "Username to impersonate for the operation")
|
|
}
|
|
if f.ImpersonateGroup != nil {
|
|
flags.StringArrayVar(f.ImpersonateGroup, flagImpersonateGroup, *f.ImpersonateGroup, "Group to impersonate for the operation, this flag can be repeated to specify multiple groups.")
|
|
}
|
|
if f.Username != nil {
|
|
flags.StringVar(f.Username, flagUsername, *f.Username, "Username for basic authentication to the API server")
|
|
}
|
|
if f.Password != nil {
|
|
flags.StringVar(f.Password, flagPassword, *f.Password, "Password for basic authentication to the API server")
|
|
}
|
|
if f.ClusterName != nil {
|
|
flags.StringVar(f.ClusterName, flagClusterName, *f.ClusterName, "The name of the kubeconfig cluster to use")
|
|
}
|
|
if f.AuthInfoName != nil {
|
|
flags.StringVar(f.AuthInfoName, flagAuthInfoName, *f.AuthInfoName, "The name of the kubeconfig user to use")
|
|
}
|
|
if f.Namespace != nil {
|
|
flags.StringVarP(f.Namespace, flagNamespace, "n", *f.Namespace, "If present, the namespace scope for this CLI request")
|
|
}
|
|
if f.Context != nil {
|
|
flags.StringVar(f.Context, flagContext, *f.Context, "The name of the kubeconfig context to use")
|
|
}
|
|
|
|
if f.APIServer != nil {
|
|
flags.StringVarP(f.APIServer, flagAPIServer, "s", *f.APIServer, "The address and port of the Kubernetes API server")
|
|
}
|
|
if f.Insecure != nil {
|
|
flags.BoolVar(f.Insecure, flagInsecure, *f.Insecure, "If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure")
|
|
}
|
|
if f.CAFile != nil {
|
|
flags.StringVar(f.CAFile, flagCAFile, *f.CAFile, "Path to a cert file for the certificate authority")
|
|
}
|
|
if f.Timeout != nil {
|
|
flags.StringVar(f.Timeout, flagTimeout, *f.Timeout, "The length of time to wait before giving up on a single server request. Non-zero values should contain a corresponding time unit (e.g. 1s, 2m, 3h). A value of zero means don't timeout requests.")
|
|
}
|
|
|
|
}
|
|
|
|
// WithDeprecatedPasswordFlag enables the username and password config flags
|
|
func (f *ConfigFlags) WithDeprecatedPasswordFlag() *ConfigFlags {
|
|
f.Username = stringptr("")
|
|
f.Password = stringptr("")
|
|
return f
|
|
}
|
|
|
|
// NewConfigFlags returns ConfigFlags with default values set
|
|
func NewConfigFlags(usePersistentConfig bool) *ConfigFlags {
|
|
impersonateGroup := []string{}
|
|
insecure := false
|
|
|
|
return &ConfigFlags{
|
|
Insecure: &insecure,
|
|
Timeout: stringptr("0"),
|
|
KubeConfig: stringptr(""),
|
|
|
|
CacheDir: stringptr(defaultCacheDir),
|
|
ClusterName: stringptr(""),
|
|
AuthInfoName: stringptr(""),
|
|
Context: stringptr(""),
|
|
Namespace: stringptr(""),
|
|
APIServer: stringptr(""),
|
|
CertFile: stringptr(""),
|
|
KeyFile: stringptr(""),
|
|
CAFile: stringptr(""),
|
|
BearerToken: stringptr(""),
|
|
Impersonate: stringptr(""),
|
|
ImpersonateGroup: &impersonateGroup,
|
|
|
|
usePersistentConfig: usePersistentConfig,
|
|
}
|
|
}
|
|
|
|
func stringptr(val string) *string {
|
|
return &val
|
|
}
|
|
|
|
// overlyCautiousIllegalFileCharacters matches characters that *might* not be supported. Windows is really restrictive, so this is really restrictive
|
|
var overlyCautiousIllegalFileCharacters = regexp.MustCompile(`[^(\w/\.)]`)
|
|
|
|
// computeDiscoverCacheDir takes the parentDir and the host and comes up with a "usually non-colliding" name.
|
|
func computeDiscoverCacheDir(parentDir, host string) string {
|
|
// strip the optional scheme from host if its there:
|
|
schemelessHost := strings.Replace(strings.Replace(host, "https://", "", 1), "http://", "", 1)
|
|
// now do a simple collapse of non-AZ09 characters. Collisions are possible but unlikely. Even if we do collide the problem is short lived
|
|
safeHost := overlyCautiousIllegalFileCharacters.ReplaceAllString(schemelessHost, "_")
|
|
return filepath.Join(parentDir, safeHost)
|
|
}
|