/
config.go
185 lines (165 loc) · 4 KB
/
config.go
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package client
import (
"fmt"
"time"
"github.com/mitchellh/go-homedir"
"github.com/sirupsen/logrus"
"k8s.io/cli-runtime/pkg/genericclioptions"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)
func NewConfigWith(kubeconfig string, context string) *Config {
flags := genericclioptions.NewConfigFlags(true)
if kubeconfig != "" {
kubeconfig = expandPath(kubeconfig)
flags.KubeConfig = &kubeconfig
}
if context != "" {
flags.Context = &context
}
return NewConfig(flags)
}
func expandPath(path string) string {
expanded, err := homedir.Expand(path)
if err != nil {
logrus.Warnf("expanding path %v failed: %v", path, err)
return path
}
return expanded
}
type Config struct {
flags *genericclioptions.ConfigFlags
rawConfig *clientcmdapi.Config
restConfig *restclient.Config
clientConfig clientcmd.ClientConfig
}
func NewConfig(flags *genericclioptions.ConfigFlags) *Config {
return &Config{flags: flags}
}
func (c *Config) CurrentNamespace() (string, error) {
if c.flags.Namespace != nil && *c.flags.Namespace != "" {
return *c.flags.Namespace, nil
}
cfg, err := c.RawConfig()
if err != nil {
return "", err
}
ctx, err := c.CurrentContext()
if err != nil {
return "", err
}
if ctx, ok := cfg.Contexts[ctx]; ok {
if ctx.Namespace != "" {
return ctx.Namespace, nil
}
}
return "", fmt.Errorf("current namespace not found")
}
func (c *Config) CurrentContext() (string, error) {
if c.flags.Context != nil && *c.flags.Context != "" {
return *c.flags.Context, nil
}
cfg, err := c.RawConfig()
if err != nil {
return "", err
}
return cfg.CurrentContext, nil
}
func (c *Config) CurrentCluster() (string, error) {
if c.flags.ClusterName != nil && *c.flags.ClusterName != "" {
return *c.flags.ClusterName, nil
}
cfg, err := c.RawConfig()
if err != nil {
return "", err
}
current := cfg.CurrentContext
if c.flags.Context != nil && *c.flags.Context != "" {
current = *c.flags.Context
}
if ctx, ok := cfg.Contexts[current]; ok {
return ctx.Cluster, nil
}
return "", fmt.Errorf("current cluster not found")
}
func (c *Config) GetContext(name string) (*clientcmdapi.Context, error) {
cfg, err := c.RawConfig()
if err != nil {
return nil, err
}
if ctx, ok := cfg.Contexts[name]; ok {
return ctx, nil
}
return nil, fmt.Errorf("invalid context %s", name)
}
func (c *Config) Contexts() (map[string]*clientcmdapi.Context, error) {
cfg, err := c.RawConfig()
if err != nil {
return nil, err
}
return cfg.Contexts, nil
}
func (c *Config) ContextNames() ([]string, error) {
cfg, err := c.RawConfig()
if err != nil {
return nil, err
}
cc := make([]string, 0, len(cfg.Contexts))
for n := range cfg.Contexts {
cc = append(cc, n)
}
return cc, nil
}
func (c *Config) ClusterNames() ([]string, error) {
cfg, err := c.RawConfig()
if err != nil {
return nil, err
}
cc := make([]string, 0, len(cfg.Clusters))
for name := range cfg.Clusters {
cc = append(cc, name)
}
return cc, nil
}
func (c *Config) RawConfig() (clientcmdapi.Config, error) {
if c.rawConfig == nil {
c.ensureConfig()
raw, err := c.clientConfig.RawConfig()
if err != nil {
return raw, err
}
c.rawConfig = &raw
if c.flags.Context == nil {
c.flags.Context = &c.rawConfig.CurrentContext
}
}
return *c.rawConfig, nil
}
func (c *Config) ConfigAccess() (clientcmd.ConfigAccess, error) {
c.ensureConfig()
return c.clientConfig.ConfigAccess(), nil
}
func (c *Config) RESTConfig() (*restclient.Config, error) {
if c.restConfig != nil {
return c.restConfig, nil
}
var err error
if c.restConfig, err = c.flags.ToRESTConfig(); err != nil {
return nil, err
}
c.setConfigParams(c.restConfig)
return c.restConfig, nil
}
func (c *Config) ensureConfig() {
if c.clientConfig != nil {
return
}
c.clientConfig = c.flags.ToRawKubeConfigLoader()
}
func (c *Config) setConfigParams(config *restclient.Config) {
config.QPS = 50
config.Burst = 50
config.Timeout = time.Second * 120
logrus.Tracef("restclient.Config: %+v", config)
}