121 lines
4.0 KiB
Go
121 lines
4.0 KiB
Go
/*
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Copyright 2017 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 commands
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import (
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"fmt"
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"io"
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manifest "k8s.io/kubectl/pkg/apis/manifest/v1alpha1"
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"k8s.io/kubectl/pkg/kinflate/configmapandsecret"
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"k8s.io/kubectl/pkg/kinflate/constants"
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kutil "k8s.io/kubectl/pkg/kinflate/util"
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"k8s.io/kubectl/pkg/kinflate/util/fs"
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"github.com/spf13/cobra"
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)
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func NewCmdAddConfigMap(errOut io.Writer, fsys fs.FileSystem) *cobra.Command {
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var config dataConfig
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cmd := &cobra.Command{
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Use: "configmap NAME [--from-file=[key=]source] [--from-literal=key1=value1]",
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Short: "Adds a configmap to your manifest file.",
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Long: "",
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Example: `
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# Adds a configmap to the Manifest (with a specified key)
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kinflate configmap my-configmap --from-file=my-key=file/path --from-literal=my-literal=12345
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# Adds a configmap to the Manifest (key is the filename)
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kinflate configmap my-configmap --from-file=file/path
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# Adds a configmap from env-file
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kinflate configmap my-configmap --from-env-file=env/path.env
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`,
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RunE: func(_ *cobra.Command, args []string) error {
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err := config.Validate(args)
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if err != nil {
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return err
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}
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// Load in the manifest file.
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loader := kutil.ManifestLoader{FS: fsys}
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m, err := loader.Read(constants.KubeManifestFileName)
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if err != nil {
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return err
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}
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// Add the config map to the manifest.
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err = addConfigMap(m, config)
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if err != nil {
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return err
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}
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// Write out the manifest with added configmap.
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return loader.Write(constants.KubeManifestFileName, m)
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},
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}
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cmd.Flags().StringSliceVar(&config.FileSources, "from-file", []string{}, "Key file can be specified using its file path, in which case file basename will be used as configmap key, or optionally with a key and file path, in which case the given key will be used. Specifying a directory will iterate each named file in the directory whose basename is a valid configmap key.")
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cmd.Flags().StringArrayVar(&config.LiteralSources, "from-literal", []string{}, "Specify a key and literal value to insert in configmap (i.e. mykey=somevalue)")
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cmd.Flags().StringVar(&config.EnvFileSource, "from-env-file", "", "Specify the path to a file to read lines of key=val pairs to create a configmap (i.e. a Docker .env file).")
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return cmd
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}
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// addConfigMap updates a configmap within a manifest, using the data in config.
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// Note: error may leave manifest in an undefined state. Suggest passing a copy
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// of manifest.
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func addConfigMap(m *manifest.Manifest, config dataConfig) error {
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cm := getOrCreateConfigMap(m, config.Name)
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err := mergeData(&cm.DataSources, config)
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if err != nil {
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return err
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}
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// Validate manifest's configmap by trying to create corev1.configmap.
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_, _, err = configmapandsecret.MakeConfigmapAndGenerateName(*cm)
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if err != nil {
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return err
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}
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return nil
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}
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func getOrCreateConfigMap(m *manifest.Manifest, name string) *manifest.ConfigMap {
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for i, v := range m.Configmaps {
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if name == v.Name {
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return &m.Configmaps[i]
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}
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}
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// config map not found, create new one and add it to the manifest.
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cm := &manifest.ConfigMap{Name: name}
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m.Configmaps = append(m.Configmaps, *cm)
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return &m.Configmaps[len(m.Configmaps)-1]
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}
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func mergeData(src *manifest.DataSources, config dataConfig) error {
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src.LiteralSources = append(src.LiteralSources, config.LiteralSources...)
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src.FileSources = append(src.FileSources, config.FileSources...)
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if src.EnvSource != "" && src.EnvSource != config.EnvFileSource {
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return fmt.Errorf("updating existing env source '%s' not allowed.", src.EnvSource)
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}
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src.EnvSource = config.EnvFileSource
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return nil
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}
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