72 lines
2.6 KiB
Go
72 lines
2.6 KiB
Go
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
package impersonator
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
v1 "k8s.io/api/core/v1"
|
|
"sigs.k8s.io/yaml"
|
|
)
|
|
|
|
type Mode string
|
|
|
|
const (
|
|
// Explicitly enable the impersonation proxy.
|
|
ModeEnabled Mode = "enabled"
|
|
|
|
// Explicitly disable the impersonation proxy.
|
|
ModeDisabled Mode = "disabled"
|
|
|
|
// Allow the proxy to decide if it should be enabled or disabled based upon the cluster in which it is running.
|
|
ModeAuto Mode = "auto"
|
|
)
|
|
|
|
const (
|
|
ConfigMapDataKey = "config.yaml"
|
|
)
|
|
|
|
// When specified, both CertificateAuthoritySecretName and TLSSecretName are required. They may be specified to
|
|
// both point at the same Secret or to point at different Secrets.
|
|
type TLSConfig struct {
|
|
// CertificateAuthoritySecretName contains the name of a namespace-local Secret resource. The corresponding Secret
|
|
// must contain a key called "ca.crt" whose value is the CA certificate which clients should trust when connecting
|
|
// to the impersonation proxy.
|
|
CertificateAuthoritySecretName string `json:"certificateAuthoritySecretName"`
|
|
|
|
// TLSSecretName contains the name of a namespace-local Secret resource. The corresponding Secret must be of type
|
|
// "kubernetes.io/tls" and contain keys called "tls.crt" and "tls.key" whose values are the TLS certificate and
|
|
// private key that will be used by the impersonation proxy to serve its endpoints.
|
|
TLSSecretName string `json:"tlsSecretName"`
|
|
}
|
|
|
|
type Config struct {
|
|
// Enable or disable the impersonation proxy. Optional. Defaults to ModeAuto.
|
|
Mode Mode `json:"mode,omitempty"`
|
|
|
|
// The HTTPS URL of the impersonation proxy for clients to use from outside the cluster. Used when creating TLS
|
|
// certificates and for clients to discover the endpoint. Optional. When not specified, if the impersonation proxy
|
|
// is started, then it will automatically create a LoadBalancer Service and use its ingress as the endpoint.
|
|
Endpoint string `json:"endpoint,omitempty"`
|
|
|
|
// The TLS configuration of the impersonation proxy's endpoints. Optional. When not specified, a CA and TLS
|
|
// certificate will be automatically created based on the Endpoint setting.
|
|
TLS *TLSConfig `json:"tls,omitempty"`
|
|
}
|
|
|
|
func FromConfigMap(configMap *v1.ConfigMap) (*Config, error) {
|
|
stringConfig, ok := configMap.Data[ConfigMapDataKey]
|
|
if !ok {
|
|
return nil, fmt.Errorf(`ConfigMap is missing expected key "%s"`, ConfigMapDataKey)
|
|
}
|
|
var config Config
|
|
if err := yaml.Unmarshal([]byte(stringConfig), &config); err != nil {
|
|
return nil, fmt.Errorf("decode yaml: %w", err)
|
|
}
|
|
if config.Mode == "" {
|
|
config.Mode = ModeAuto // set the default value
|
|
}
|
|
return &config, nil
|
|
}
|