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clientcmd.go
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clientcmd.go
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package clientcmd
import (
"fmt"
"io/ioutil"
"strings"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
kclient "github.com/GoogleCloudPlatform/kubernetes/pkg/client"
"github.com/golang/glog"
"github.com/spf13/pflag"
osclient "github.com/openshift/origin/pkg/client"
"github.com/openshift/origin/pkg/cmd/flagtypes"
"github.com/openshift/origin/pkg/cmd/util"
)
const ConfigSyntax = " --master=<addr>"
// Config contains all the necessary bits for client configuration
type Config struct {
// MasterAddr is the address the master can be reached on (host, host:port, or URL).
MasterAddr flagtypes.Addr
// KubernetesAddr is the address of the Kubernetes server (host, host:port, or URL).
// If omitted defaults to the master.
KubernetesAddr flagtypes.Addr
// CommonConfig is the shared base config for both the OpenShift config and Kubernetes config
CommonConfig kclient.Config
}
// NewConfig returns a new configuration
func NewConfig() *Config {
return &Config{
MasterAddr: flagtypes.Addr{Value: "localhost:8080", DefaultScheme: "http", DefaultPort: 8080, AllowPrefix: true}.Default(),
KubernetesAddr: flagtypes.Addr{Value: "localhost:8080", DefaultScheme: "http", DefaultPort: 8080}.Default(),
CommonConfig: kclient.Config{},
}
}
// BindClientConfigSecurityFlags adds flags for the supplied client config
func BindClientConfigSecurityFlags(config *kclient.Config, flags *pflag.FlagSet) {
flags.BoolVar(&config.Insecure, "insecure-skip-tls-verify", config.Insecure, "If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure.")
flags.StringVar(&config.CertFile, "client-certificate", config.CertFile, "Path to a client key file for TLS.")
flags.StringVar(&config.KeyFile, "client-key", config.KeyFile, "Path to a client key file for TLS.")
flags.StringVar(&config.CAFile, "certificate-authority", config.CAFile, "Path to a cert. file for the certificate authority")
flags.StringVar(&config.BearerToken, "token", config.BearerToken, "If present, the bearer token for this request.")
}
// Bind binds configuration values to the passed flagset
func (cfg *Config) Bind(flags *pflag.FlagSet) {
flags.Var(&cfg.MasterAddr, "master", "The address the master can be reached on (host, host:port, or URL).")
flags.Var(&cfg.KubernetesAddr, "kubernetes", "The address of the Kubernetes server (host, host:port, or URL). If omitted defaults to the master.")
BindClientConfigSecurityFlags(&cfg.CommonConfig, flags)
}
func EnvVars(host string, caData []byte, insecure bool, bearerTokenFile string) []api.EnvVar {
envvars := []api.EnvVar{
{Name: "KUBERNETES_MASTER", Value: host},
{Name: "OPENSHIFT_MASTER", Value: host},
}
if len(bearerTokenFile) > 0 {
envvars = append(envvars, api.EnvVar{Name: "BEARER_TOKEN_FILE", Value: bearerTokenFile})
}
if len(caData) > 0 {
envvars = append(envvars, api.EnvVar{Name: "OPENSHIFT_CA_DATA", Value: string(caData)})
} else if insecure {
envvars = append(envvars, api.EnvVar{Name: "OPENSHIFT_INSECURE", Value: "true"})
}
return envvars
}
func (cfg *Config) bindEnv() error {
var err error
if value, ok := util.GetEnv("KUBERNETES_MASTER"); ok && !cfg.KubernetesAddr.Provided {
cfg.KubernetesAddr.Set(value)
}
if value, ok := util.GetEnv("OPENSHIFT_MASTER"); ok && !cfg.MasterAddr.Provided {
cfg.MasterAddr.Set(value)
}
if value, ok := util.GetEnv("BEARER_TOKEN"); ok && len(cfg.CommonConfig.BearerToken) == 0 {
cfg.CommonConfig.BearerToken = value
}
if value, ok := util.GetEnv("BEARER_TOKEN_FILE"); ok && len(cfg.CommonConfig.BearerToken) == 0 {
if tokenData, tokenErr := ioutil.ReadFile(value); tokenErr == nil {
cfg.CommonConfig.BearerToken = strings.TrimSpace(string(tokenData))
if len(cfg.CommonConfig.BearerToken) == 0 {
err = fmt.Errorf("BEARER_TOKEN_FILE %q was empty", value)
}
} else {
err = fmt.Errorf("Error reading BEARER_TOKEN_FILE %q: %v", value, tokenErr)
}
}
if value, ok := util.GetEnv("OPENSHIFT_CA_FILE"); ok && len(cfg.CommonConfig.CAFile) == 0 {
cfg.CommonConfig.CAFile = value
} else if value, ok := util.GetEnv("OPENSHIFT_CA_DATA"); ok && len(cfg.CommonConfig.CAData) == 0 {
cfg.CommonConfig.CAData = []byte(value)
}
if value, ok := util.GetEnv("OPENSHIFT_CERT_FILE"); ok && len(cfg.CommonConfig.CertFile) == 0 {
cfg.CommonConfig.CertFile = value
} else if value, ok := util.GetEnv("OPENSHIFT_CERT_DATA"); ok && len(cfg.CommonConfig.CertData) == 0 {
cfg.CommonConfig.CertData = []byte(value)
}
if value, ok := util.GetEnv("OPENSHIFT_KEY_FILE"); ok && len(cfg.CommonConfig.KeyFile) == 0 {
cfg.CommonConfig.KeyFile = value
} else if value, ok := util.GetEnv("OPENSHIFT_KEY_DATA"); ok && len(cfg.CommonConfig.KeyData) == 0 {
cfg.CommonConfig.KeyData = []byte(value)
}
if value, ok := util.GetEnv("OPENSHIFT_INSECURE"); ok && len(value) != 0 {
cfg.CommonConfig.Insecure = value == "true"
}
return err
}
// KubeConfig returns the Kubernetes configuration
func (cfg *Config) KubeConfig() *kclient.Config {
err := cfg.bindEnv()
if err != nil {
glog.Error(err)
}
kaddr := cfg.KubernetesAddr
if !kaddr.Provided {
kaddr = cfg.MasterAddr
}
kConfig := cfg.CommonConfig
kConfig.Host = kaddr.URL.String()
return &kConfig
}
// OpenShiftConfig returns the OpenShift configuration
func (cfg *Config) OpenShiftConfig() *kclient.Config {
err := cfg.bindEnv()
if err != nil {
glog.Error(err)
}
osConfig := cfg.CommonConfig
osConfig.Host = cfg.MasterAddr.String()
return &osConfig
}
// Clients returns an OpenShift and a Kubernetes client from a given configuration
func (cfg *Config) Clients() (osclient.Interface, kclient.Interface, error) {
cfg.bindEnv()
kubeClient, err := kclient.New(cfg.KubeConfig())
if err != nil {
return nil, nil, fmt.Errorf("Unable to configure Kubernetes client: %v", err)
}
osClient, err := osclient.New(cfg.OpenShiftConfig())
if err != nil {
return nil, nil, fmt.Errorf("Unable to configure OpenShift client: %v", err)
}
return osClient, kubeClient, nil
}