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config.go
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config.go
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package pluginconfig
import (
"io/ioutil"
"os"
"k8s.io/apimachinery/pkg/apimachinery/announced"
"k8s.io/apimachinery/pkg/apimachinery/registered"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
kyaml "k8s.io/apimachinery/pkg/util/yaml"
kapiserverinstall "k8s.io/apiserver/pkg/apis/apiserver/install"
kapiserverv1alpha1 "k8s.io/apiserver/pkg/apis/apiserver/v1alpha1"
configapi "github.com/openshift/origin/pkg/cmd/server/api"
"github.com/openshift/origin/pkg/cmd/server/api/latest"
)
var (
groupFactoryRegistry = make(announced.APIGroupFactoryRegistry)
registry = registered.NewOrDie("")
scheme = runtime.NewScheme()
codecs = serializer.NewCodecFactory(scheme)
)
func init() {
kapiserverinstall.Install(groupFactoryRegistry, registry, scheme)
}
func GetPluginConfig(cfg configapi.AdmissionPluginConfig) (string, error) {
obj := cfg.Configuration
if obj == nil {
return cfg.Location, nil
}
configFile, err := ioutil.TempFile("", "admission-plugin-config")
if err != nil {
return "", err
}
if err = configFile.Close(); err != nil {
return "", err
}
content, err := latest.WriteYAML(obj)
if err != nil {
return "", err
}
if err = ioutil.WriteFile(configFile.Name(), content, 0644); err != nil {
return "", err
}
return configFile.Name(), nil
}
// GetPluginConfigFile translates from the master plugin config to a file name containing
// a particular plugin's config (the file may be a temp file if config is embedded)
func GetPluginConfigFile(pluginConfig map[string]configapi.AdmissionPluginConfig, pluginName string, defaultConfigFilePath string) (string, error) {
// Check whether a config is specified for this plugin. If not, default to the
// global plugin config file (if any).
if cfg, hasConfig := pluginConfig[pluginName]; hasConfig {
configFilePath, err := GetPluginConfig(cfg)
if err != nil {
return "", err
}
return configFilePath, nil
}
return defaultConfigFilePath, nil
}
func GetAdmissionConfigurationConfig(pluginName string, cfg configapi.AdmissionPluginConfig) (string, error) {
if cfg.Configuration == nil && cfg.Location == "" {
return "", nil
}
var cfgJSON []byte
if cfg.Configuration == nil {
f, err := os.Open(cfg.Location)
if err != nil {
return "", err
}
data, err := ioutil.ReadAll(f)
if err != nil {
return "", err
}
cfgJSON, err = kyaml.ToJSON(data)
if err != nil {
return "", err
}
} else {
var err error
cfgJSON, err = runtime.Encode(latest.Codec, cfg.Configuration)
if err != nil {
return "", err
}
}
// convert into versioned admission plugin configuration
obj := kapiserverv1alpha1.AdmissionConfiguration{
Plugins: []kapiserverv1alpha1.AdmissionPluginConfiguration{
{
Name: pluginName,
Configuration: runtime.RawExtension{Raw: cfgJSON},
},
},
}
configFile, err := ioutil.TempFile("", "admission-plugin-config")
if err != nil {
return "", err
}
if err = configFile.Close(); err != nil {
return "", err
}
codec := codecs.LegacyCodec(kapiserverv1alpha1.SchemeGroupVersion)
data, err := runtime.Encode(codec, &obj)
if err != nil {
return "", err
}
if err = ioutil.WriteFile(configFile.Name(), data, 0644); err != nil {
return "", err
}
return configFile.Name(), nil
}
// GetAdmissionConfigurationFile translates from the master plugin config to a file name containing
// a particular plugin's config (the file may be a temp file if config is embedded), embedded in
// k8s.io/apiserver/pkg/apis/apiserver.AdmissionConfiguration.
func GetAdmissionConfigurationFile(pluginConfig map[string]configapi.AdmissionPluginConfig, pluginName string, defaultConfigFilePath string) (string, error) {
// Check whether a config is specified for this plugin. If not, default to the
// global plugin config file (if any).
if cfg, hasConfig := pluginConfig[pluginName]; hasConfig {
configFilePath, err := GetAdmissionConfigurationConfig(pluginName, cfg)
if err != nil {
return "", err
}
return configFilePath, nil
}
return defaultConfigFilePath, nil
}