82 lines
2.7 KiB
Go
82 lines
2.7 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package config
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import (
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"fmt"
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"io/ioutil"
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"github.com/golang/glog"
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"k8s.io/apimachinery/pkg/runtime"
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kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
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kubeadmscheme "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/scheme"
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kubeadmapiv1alpha3 "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1alpha3"
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"k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/validation"
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"k8s.io/kubernetes/pkg/util/node"
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)
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// SetJoinDynamicDefaults checks and sets configuration values for the JoinConfiguration object
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func SetJoinDynamicDefaults(cfg *kubeadmapi.JoinConfiguration) error {
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nodeName, err := node.GetHostname(cfg.NodeRegistration.Name)
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if err != nil {
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return err
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}
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cfg.NodeRegistration.Name = nodeName
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return nil
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}
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// NodeConfigFileAndDefaultsToInternalConfig
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func NodeConfigFileAndDefaultsToInternalConfig(cfgPath string, defaultversionedcfg *kubeadmapiv1alpha3.JoinConfiguration) (*kubeadmapi.JoinConfiguration, error) {
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internalcfg := &kubeadmapi.JoinConfiguration{}
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if cfgPath != "" {
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// Loads configuration from config file, if provided
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// Nb. --config overrides command line flags, TODO: fix this
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glog.V(1).Infoln("loading configuration from the given file")
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b, err := ioutil.ReadFile(cfgPath)
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if err != nil {
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return nil, fmt.Errorf("unable to read config from %q [%v]", cfgPath, err)
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}
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if err := DetectUnsupportedVersion(b); err != nil {
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return nil, err
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}
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if err := runtime.DecodeInto(kubeadmscheme.Codecs.UniversalDecoder(), b, internalcfg); err != nil {
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return nil, err
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}
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} else {
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// Takes passed flags into account; the defaulting is executed once again enforcing assignement of
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// static default values to cfg only for values not provided with flags
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kubeadmscheme.Scheme.Default(defaultversionedcfg)
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kubeadmscheme.Scheme.Convert(defaultversionedcfg, internalcfg, nil)
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}
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// Applies dynamic defaults to settings not provided with flags
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if err := SetJoinDynamicDefaults(internalcfg); err != nil {
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return nil, err
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}
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// Validates cfg (flags/configs + defaults)
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if err := validation.ValidateJoinConfiguration(internalcfg).ToAggregate(); err != nil {
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return nil, err
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}
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return internalcfg, nil
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}
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