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Merge pull request #66074 from rosti/print-default

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Automatic merge from submit-queue (batch tested with PRs 66136, 64999, 65425, 66120, 66074). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

kubeadm: Printable default component configs

**What this PR does / why we need it**:

This PR makes default component configs printable via `kubeadm config print-default`.
Component configs are not printed by default. You have to explicitly request
that for concrete API objects via the `--api-objects` command line parameter.
For a list of possible API objects use the help option.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Refs kubernetes/kubeadm#963

**Special notes for your reviewer**:
/cc @kubernetes/sig-cluster-lifecycle-pr-reviews
/area kubeadm
/assign @luxas
/assign @timothysc
/kind feature

**Release note**:

```release-note
kubeadm: Default component configs are printable via kubeadm config print-default
```
This commit is contained in:
Kubernetes Submit Queue 2018-07-12 15:14:23 -07:00 committed by GitHub
commit 64eb015471
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2 changed files with 71 additions and 21 deletions
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2
cmd/kubeadm/app/cmd/BUILD
View File

@ -29,6 +29,7 @@ go_library(
"//cmd/kubeadm/app/cmd/phases:go_default_library",
"//cmd/kubeadm/app/cmd/upgrade:go_default_library",
"//cmd/kubeadm/app/cmd/util:go_default_library",
"//cmd/kubeadm/app/componentconfigs:go_default_library",
"//cmd/kubeadm/app/constants:go_default_library",
"//cmd/kubeadm/app/discovery:go_default_library",
"//cmd/kubeadm/app/features:go_default_library",
@ -57,7 +58,6 @@ go_library(
"//pkg/version:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/fields:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/duration:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/wait:go_default_library",

90
cmd/kubeadm/app/cmd/config.go
View File

@ -29,13 +29,13 @@ import (
flag "github.com/spf13/pflag"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
clientset "k8s.io/client-go/kubernetes"
kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
kubeadmscheme "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/scheme"
kubeadmapiv1alpha2 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1alpha2"
kubeadmapiv1alpha3 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1alpha3"
cmdutil "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util"
"k8s.io/kubernetes/cmd/kubeadm/app/componentconfigs"
"k8s.io/kubernetes/cmd/kubeadm/app/constants"
"k8s.io/kubernetes/cmd/kubeadm/app/features"
"k8s.io/kubernetes/cmd/kubeadm/app/images"
@ -47,8 +47,6 @@ import (
)
var (
defaultAPIObjects = []string{constants.InitConfigurationKind, constants.NodeConfigurationKind}
availableAPIObjects = []string{constants.InitConfigurationKind, constants.MasterConfigurationKind, constants.NodeConfigurationKind}
// sillyToken is only set statically to make kubeadm not randomize the token on every run
sillyToken = kubeadmapiv1alpha3.BootstrapToken{
Token: &kubeadmapiv1alpha3.BootstrapTokenString{
@ -90,7 +88,6 @@ func NewCmdConfig(out io.Writer) *cobra.Command {
}
// NewCmdConfigPrintDefault returns cobra.Command for "kubeadm config print-default" command
// TODO: Make it possible to print the defaults for the componentconfig API objects, and default to printing them out as well
func NewCmdConfigPrintDefault(out io.Writer) *cobra.Command {
apiObjects := []string{}
cmd := &cobra.Command{
@ -106,7 +103,7 @@ func NewCmdConfigPrintDefault(out io.Writer) *cobra.Command {
`), sillyToken),
Run: func(cmd *cobra.Command, args []string) {
if len(apiObjects) == 0 {
apiObjects = defaultAPIObjects
apiObjects = getSupportedAPIObjects()
}
allBytes := [][]byte{}
for _, apiObject := range apiObjects {
@ -118,36 +115,89 @@ func NewCmdConfigPrintDefault(out io.Writer) *cobra.Command {
},
}
cmd.Flags().StringSliceVar(&apiObjects, "api-objects", apiObjects,
fmt.Sprintf("A comma-separated list for API objects to print the default values for. Available values: %v. This flag unset means 'print all known objects'", availableAPIObjects))
fmt.Sprintf("A comma-separated list for API objects to print the default values for. Available values: %v. This flag unset means 'print all known objects'", getAllAPIObjectNames()))
return cmd
}
func getDefaultAPIObjectBytes(apiObject string) ([]byte, error) {
var internalcfg runtime.Object
var err error
switch apiObject {
case constants.InitConfigurationKind, constants.MasterConfigurationKind:
internalcfg, err = configutil.ConfigFileAndDefaultsToInternalConfig("", &kubeadmapiv1alpha3.InitConfiguration{
API: kubeadmapiv1alpha3.API{AdvertiseAddress: "1.2.3.4"},
BootstrapTokens: []kubeadmapiv1alpha3.BootstrapToken{sillyToken},
KubernetesVersion: fmt.Sprintf("v1.%d.0", constants.MinimumControlPlaneVersion.Minor()+1),
})
return getDefaultInitConfigBytes()
case constants.NodeConfigurationKind:
internalcfg, err = configutil.NodeConfigFileAndDefaultsToInternalConfig("", &kubeadmapiv1alpha3.NodeConfiguration{
Token: sillyToken.Token.String(),
DiscoveryTokenAPIServers: []string{"kube-apiserver:6443"},
DiscoveryTokenUnsafeSkipCAVerification: true,
})
// TODO: DiscoveryTokenUnsafeSkipCAVerification: true needs to be set for validation to pass, but shouldn't be recommended as the default
return getDefaultNodeConfigBytes()
default:
err = fmt.Errorf("--api-object needs to be one of %v", availableAPIObjects)
// Is this a component config?
registration, ok := componentconfigs.Known[componentconfigs.RegistrationKind(apiObject)]
if !ok {
return []byte{}, fmt.Errorf("--api-object needs to be one of %v", getAllAPIObjectNames())
}
return getDefaultComponentConfigBytes(registration)
}
}
// getSupportedAPIObjects returns all currently supported API object names
func getSupportedAPIObjects() []string {
objects := []string{constants.InitConfigurationKind, constants.NodeConfigurationKind}
for componentType := range componentconfigs.Known {
objects = append(objects, string(componentType))
}
return objects
}
// getAllAPIObjectNames returns currently supported API object names and their historical aliases
func getAllAPIObjectNames() []string {
historicAPIObjectAliases := []string{constants.MasterConfigurationKind}
objects := getSupportedAPIObjects()
objects = append(objects, historicAPIObjectAliases...)
return objects
}
func getDefaultedInitConfig() (*kubeadmapi.InitConfiguration, error) {
return configutil.ConfigFileAndDefaultsToInternalConfig("", &kubeadmapiv1alpha3.InitConfiguration{
API: kubeadmapiv1alpha3.API{AdvertiseAddress: "1.2.3.4"},
BootstrapTokens: []kubeadmapiv1alpha3.BootstrapToken{sillyToken},
KubernetesVersion: fmt.Sprintf("v1.%d.0", constants.MinimumControlPlaneVersion.Minor()+1),
})
}
func getDefaultInitConfigBytes() ([]byte, error) {
internalcfg, err := getDefaultedInitConfig()
if err != nil {
return []byte{}, err
}
return configutil.MarshalKubeadmConfigObject(internalcfg)
}
func getDefaultNodeConfigBytes() ([]byte, error) {
internalcfg, err := configutil.NodeConfigFileAndDefaultsToInternalConfig("", &kubeadmapiv1alpha3.NodeConfiguration{
Token: sillyToken.Token.String(),
DiscoveryTokenAPIServers: []string{"kube-apiserver:6443"},
DiscoveryTokenUnsafeSkipCAVerification: true, // TODO: DiscoveryTokenUnsafeSkipCAVerification: true needs to be set for validation to pass, but shouldn't be recommended as the default
})
if err != nil {
return []byte{}, err
}
return configutil.MarshalKubeadmConfigObject(internalcfg)
}
func getDefaultComponentConfigBytes(registration componentconfigs.Registration) ([]byte, error) {
defaultedInitConfig, err := getDefaultedInitConfig()
if err != nil {
return []byte{}, err
}
realobj, ok := registration.GetFromInternalConfig(defaultedInitConfig)
if !ok {
return []byte{}, fmt.Errorf("GetFromInternalConfig failed")
}
return registration.Marshal(realobj)
}
// NewCmdConfigMigrate returns cobra.Command for "kubeadm config migrate" command
func NewCmdConfigMigrate(out io.Writer) *cobra.Command {
var oldCfgPath, newCfgPath string