/
options.go
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/
options.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package options
import (
"fmt"
"net"
"os"
"github.com/spf13/pflag"
"github.com/spf13/viper"
"k8s.io/apimachinery/pkg/util/sets"
apiserveroptions "tkestack.io/tke/pkg/apiserver/options"
"tkestack.io/tke/pkg/util/log"
)
const (
flagHeaderRequest = "header-request"
flagGatewayConfig = "gateway-config"
configHeaderRequest = "header_request"
configGatewayConfig = "gateway_config"
)
// Options is the main context object for the TKE gateway server.
type Options struct {
Log *log.Options
SecureServing *apiserveroptions.SecureServingOptions
InsecureServing *apiserveroptions.InsecureServingOptions
Generic *apiserveroptions.GenericOptions
OIDC *apiserveroptions.OIDCWithSecretOptions
// The Gateway will load its initial configuration from this file.
// The path may be absolute or relative; relative paths are under the Gateway's current working directory.
GatewayConfig string
HeaderRequest bool
}
// NewOptions creates a new Options with a default config.
func NewOptions(serverName string) *Options {
return &Options{
Log: log.NewOptions(),
SecureServing: apiserveroptions.NewSecureServingOptions(serverName, 9441),
InsecureServing: apiserveroptions.NewInsecureServingOptions(9442),
Generic: apiserveroptions.NewGenericOptions(),
OIDC: apiserveroptions.NewOIDCWithSecretOptions(),
HeaderRequest: false,
}
}
// AddFlags adds flags for a specific server to the specified FlagSet object.
func (o *Options) AddFlags(fs *pflag.FlagSet) {
o.Log.AddFlags(fs)
o.SecureServing.AddFlags(fs)
o.InsecureServing.AddFlags(fs)
o.Generic.AddFlags(fs)
o.OIDC.AddFlags(fs)
fs.String(flagGatewayConfig, o.GatewayConfig,
"The Gateway will load its initial configuration from this file. The path may be absolute or relative; relative paths start at the Gateway's current working directory. Omit this flag to use the built-in default configuration values.")
_ = viper.BindPFlag(configGatewayConfig, fs.Lookup(flagGatewayConfig))
fs.Bool(flagHeaderRequest, o.HeaderRequest,
"If enables, gateway will not check cookie for static file and use X-Remote-User header to inspect username.")
_ = viper.BindPFlag(configHeaderRequest, fs.Lookup(flagHeaderRequest))
}
// ApplyFlags parsing parameters from the command line or configuration file
// to the options instance.
func (o *Options) ApplyFlags() []error {
var errs []error
errs = append(errs, o.Log.ApplyFlags()...)
errs = append(errs, o.SecureServing.ApplyFlags()...)
errs = append(errs, o.InsecureServing.ApplyFlags()...)
errs = append(errs, o.Generic.ApplyFlags()...)
errs = append(errs, o.OIDC.ApplyFlags()...)
o.GatewayConfig = viper.GetString(configGatewayConfig)
o.HeaderRequest = viper.GetBool(configHeaderRequest)
return errs
}
// Complete set default Options.
// Should be called after tke-console flags parsed.
func (o *Options) Complete() error {
// set defaults
if err := o.Generic.DefaultAdvertiseAddressWithInsecure(o.SecureServing, o.InsecureServing); err != nil {
return err
}
if err := o.SecureServing.MaybeDefaultWithSelfSignedCerts(o.Generic.AdvertiseAddress.String(), []string{"localhost", "localhost.localdomain"}, []net.IP{net.ParseIP("127.0.0.1")}); err != nil {
return fmt.Errorf("error creating self-signed certificates: %v", err)
}
if len(o.Generic.ExternalHost) == 0 {
if len(o.Generic.AdvertiseAddress) > 0 {
o.Generic.ExternalHost = o.Generic.AdvertiseAddress.String()
} else {
if hostname, err := os.Hostname(); err == nil {
o.Generic.ExternalHost = hostname
} else {
return fmt.Errorf("error finding host name: %v", err)
}
}
log.Infof("External host was not specified, using %v", o.Generic.ExternalHost)
}
if o.Generic.ExternalPort == 0 {
if o.SecureServing.BindPort > 0 {
o.Generic.ExternalPort = o.SecureServing.BindPort
log.Infof("External port was not specified, using secure binding port %d", o.SecureServing.BindPort)
} else if o.InsecureServing.BindPort > 0 {
o.Generic.ExternalPort = o.InsecureServing.BindPort
log.Infof("External port was not specified, using insecure binding port %d", o.InsecureServing.BindPort)
}
}
if o.Generic.ExternalScheme == "" {
o.Generic.ExternalScheme = "https"
log.Info("External scheme was not specified, using default scheme `HTTPS`")
} else {
schemes := sets.NewString("http", "https")
if !schemes.Has(o.Generic.ExternalScheme) {
return fmt.Errorf("error matching external scheme: %s, must be http or https", o.Generic.ExternalScheme)
}
}
return nil
}