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helm.go
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helm.go
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/*
Copyright The Helm Authors.
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
http://www.apache.org/licenses/LICENSE-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 OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main // import "k8s.io/helm/cmd/helm"
import (
"fmt"
"log"
"os"
"sync"
// Import to initialize client auth plugins.
"k8s.io/cli-runtime/pkg/genericclioptions"
_ "k8s.io/client-go/plugin/pkg/client/auth"
"k8s.io/helm/pkg/action"
"k8s.io/helm/pkg/helm"
"k8s.io/helm/pkg/helm/environment"
"k8s.io/helm/pkg/kube"
"k8s.io/helm/pkg/storage"
"k8s.io/helm/pkg/storage/driver"
)
var (
settings environment.EnvSettings
config genericclioptions.RESTClientGetter
configOnce sync.Once
)
func init() {
log.SetFlags(log.Lshortfile)
}
func logf(format string, v ...interface{}) {
if settings.Debug {
format = fmt.Sprintf("[debug] %s\n", format)
log.Output(2, fmt.Sprintf(format, v...))
}
}
func main() {
cmd := newRootCmd(nil, os.Stdout, os.Args[1:])
if err := cmd.Execute(); err != nil {
logf("%+v", err)
os.Exit(1)
}
}
// ensureHelmClient returns a new helm client impl. if h is not nil.
func ensureHelmClient(h helm.Interface, allNamespaces bool) helm.Interface {
if h != nil {
return h
}
return newClient(allNamespaces)
}
func newClient(allNamespaces bool) helm.Interface {
kc := kube.New(kubeConfig())
kc.Log = logf
clientset, err := kc.KubernetesClientSet()
if err != nil {
// TODO return error
log.Fatal(err)
}
var namespace string
if !allNamespaces {
namespace = getNamespace()
}
// TODO add other backends
d := driver.NewConfigMaps(clientset.CoreV1().ConfigMaps(namespace))
d.Log = logf
return helm.NewClient(
helm.KubeClient(kc),
helm.Driver(d),
helm.Discovery(clientset.Discovery()),
)
}
func newActionConfig(allNamespaces bool) *action.Configuration {
kc := kube.New(kubeConfig())
kc.Log = logf
clientset, err := kc.KubernetesClientSet()
if err != nil {
// TODO return error
log.Fatal(err)
}
var namespace string
if !allNamespaces {
namespace = getNamespace()
}
var store *storage.Storage
switch os.Getenv("HELM_DRIVER") {
case "secret", "secrets", "":
d := driver.NewSecrets(clientset.CoreV1().Secrets(namespace))
d.Log = logf
store = storage.Init(d)
case "configmap", "configmaps":
d := driver.NewConfigMaps(clientset.CoreV1().ConfigMaps(namespace))
d.Log = logf
store = storage.Init(d)
case "memory":
d := driver.NewMemory()
store = storage.Init(d)
default:
// Not sure what to do here.
panic("Unknown driver in HELM_DRIVER: " + os.Getenv("HELM_DRIVER"))
}
return &action.Configuration{
KubeClient: kc,
Releases: store,
Discovery: clientset.Discovery(),
}
}
func kubeConfig() genericclioptions.RESTClientGetter {
configOnce.Do(func() {
config = kube.GetConfig(settings.KubeConfig, settings.KubeContext, settings.Namespace)
})
return config
}
func getNamespace() string {
if ns, _, err := kubeConfig().ToRawKubeConfigLoader().Namespace(); err == nil {
return ns
}
return "default"
}