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[GSoC 2019] kubectl plugin for the Postgres operator (#579)
* Add a prototype of a kubectl plugin for the Postgres operator Work done by Vineeth Pothulapati <vineethpothulapati@outlook.com> during Google Summer of Code 2019
This commit is contained in:
Vineeth Reddy
committed by
Sergey Dudoladov
Sergey Dudoladov
parent
056b2222a5
commit
fd6a2454e8
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/*
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Copyright © 2019 Vineeth Pothulapati <vineethpothulapati@outlook.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package cmd
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import (
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"fmt"
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"github.com/spf13/cobra"
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"github.com/zalando/postgres-operator/pkg/apis/acid.zalan.do/v1"
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PostgresqlLister "github.com/zalando/postgres-operator/pkg/generated/clientset/versioned/typed/acid.zalan.do/v1"
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"io/ioutil"
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"k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset/scheme"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"log"
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)
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// deleteCmd represents kubectl pg delete.
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var deleteCmd = &cobra.Command{
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Use: "delete",
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Short: "Deletes postgresql object by cluster-name/manifest file",
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Long: `Deletes the postgres objects identified by a manifest file or cluster-name.
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Deleting the manifest is sufficient to delete the cluster.`,
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Run: func(cmd *cobra.Command, args []string) {
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namespace, _ := cmd.Flags().GetString("namespace")
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file, _ := cmd.Flags().GetString("file")
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if file != "" {
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deleteByFile(file)
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} else if namespace != "" {
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if len(args) != 0 {
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clusterName := args[0]
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deleteByName(clusterName, namespace)
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} else {
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fmt.Println("cluster name can't be empty")
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}
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} else {
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fmt.Println("use the flag either -n or -f to delete a resource.")
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}
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},
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Example: `
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#Deleting the postgres cluster using manifest file
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kubectl pg delete -f cluster-manifest.yaml
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#Deleting the postgres cluster using cluster name in current namespace.
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kubectl pg delete cluster01
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#Deleting the postgres cluster using cluster name in provided namespace
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kubectl pg delete cluster01 -n namespace01
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`,
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}
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func deleteByFile(file string) {
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config := getConfig()
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postgresConfig, err := PostgresqlLister.NewForConfig(config)
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if err != nil {
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log.Fatal(err)
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}
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ymlFile, err := ioutil.ReadFile(file)
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if err != nil {
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log.Fatal(err)
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}
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decode := scheme.Codecs.UniversalDeserializer().Decode
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obj, _, err := decode([]byte(ymlFile), nil, &v1.Postgresql{})
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if err != nil {
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log.Fatal(err)
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}
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postgresSql := obj.(*v1.Postgresql)
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_, err = postgresConfig.Postgresqls(postgresSql.Namespace).Get(postgresSql.Name, metav1.GetOptions{})
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if err != nil {
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fmt.Printf("Postgresql %s not found with the provided namespace %s : %s \n", postgresSql.Name, postgresSql.Namespace, err)
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return
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}
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fmt.Printf("Are you sure you want to remove this PostgreSQL cluster? If so, please type (%s/%s) and hit Enter\n", postgresSql.Namespace, postgresSql.Name)
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confirmAction(postgresSql.Name, postgresSql.Namespace)
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err = postgresConfig.Postgresqls(postgresSql.Namespace).Delete(postgresSql.Name, &metav1.DeleteOptions{})
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Postgresql %s deleted from %s.\n", postgresSql.Name, postgresSql.Namespace)
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}
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func deleteByName(clusterName string, namespace string) {
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config := getConfig()
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postgresConfig, err := PostgresqlLister.NewForConfig(config)
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if err != nil {
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log.Fatal(err)
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}
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_, err = postgresConfig.Postgresqls(namespace).Get(clusterName, metav1.GetOptions{})
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if err != nil {
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fmt.Printf("Postgresql %s not found with the provided namespace %s : %s \n", clusterName, namespace, err)
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return
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}
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fmt.Printf("Are you sure you want to remove this PostgreSQL cluster? If so, please type (%s/%s) and hit Enter\n", namespace, clusterName)
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confirmAction(clusterName, namespace)
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err = postgresConfig.Postgresqls(namespace).Delete(clusterName, &metav1.DeleteOptions{})
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Postgresql %s deleted from %s.\n", clusterName, namespace)
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}
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func init() {
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namespace := getCurrentNamespace()
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deleteCmd.Flags().StringP("namespace", "n", namespace, "namespace of the cluster to be deleted.")
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deleteCmd.Flags().StringP("file", "f", "", "manifest file with the cluster definition.")
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rootCmd.AddCommand(deleteCmd)
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}
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