115 lines
3.9 KiB
Go
115 lines
3.9 KiB
Go
/*
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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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"context"
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"encoding/json"
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"fmt"
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"log"
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"github.com/spf13/cobra"
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PostgresqlLister "github.com/zalando/postgres-operator/pkg/generated/clientset/versioned/typed/acid.zalan.do/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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)
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// addDbCmd represents the addDb command
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var addDbCmd = &cobra.Command{
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Use: "add-db",
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Short: "Adds a DB and its owner to a Postgres cluster. The owner role is created if it does not exist",
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Long: `Adds a new DB to the Postgres cluster. Owner needs to be specified by the -o flag, cluster with -c flag.`,
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Run: func(cmd *cobra.Command, args []string) {
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if len(args) > 0 {
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dbName := args[0]
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dbOwner, _ := cmd.Flags().GetString("owner")
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clusterName, _ := cmd.Flags().GetString("cluster")
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addDb(dbName, dbOwner, clusterName)
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} else {
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fmt.Println("database name can't be empty. Use kubectl pg add-db [-h | --help] for more info")
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}
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},
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Example: `
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kubectl pg add-db db01 -o owner01 -c cluster01
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`,
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}
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// add db and it's owner to the cluster
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func addDb(dbName string, dbOwner string, clusterName 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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namespace := getCurrentNamespace()
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postgresql, err := postgresConfig.Postgresqls(namespace).Get(context.TODO(), clusterName, metav1.GetOptions{})
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if err != nil {
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log.Fatal(err)
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}
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var dbOwnerExists bool
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dbUsers := postgresql.Spec.Users
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for key, _ := range dbUsers {
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if key == dbOwner {
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dbOwnerExists = true
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}
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}
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var patch []byte
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// validating reserved DB names
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if dbOwnerExists && dbName != "postgres" && dbName != "template0" && dbName != "template1" {
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patch = dbPatch(dbName, dbOwner)
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} else if !dbOwnerExists {
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log.Fatal("The provided db-owner doesn't exist")
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} else {
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log.Fatal("The provided db-name is reserved by postgres")
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}
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updatedPostgres, err := postgresConfig.Postgresqls(namespace).Patch(context.TODO(), postgresql.Name, types.MergePatchType, patch, metav1.PatchOptions{})
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if err != nil {
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log.Fatal(err)
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}
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if updatedPostgres.ResourceVersion != postgresql.ResourceVersion {
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fmt.Printf("Created new database %s with owner %s in PostgreSQL cluster %s.\n", dbName, dbOwner, updatedPostgres.Name)
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} else {
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fmt.Printf("postgresql %s is unchanged.\n", updatedPostgres.Name)
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}
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}
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func dbPatch(dbname string, owner string) []byte {
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ins := map[string]map[string]map[string]string{"spec": {"databases": {dbname: owner}}}
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patchInstances, err := json.Marshal(ins)
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if err != nil {
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log.Fatal(err, "unable to parse patch for add-db")
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}
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return patchInstances
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}
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func init() {
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addDbCmd.Flags().StringP("owner", "o", "", "provide owner of the database.")
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addDbCmd.Flags().StringP("cluster", "c", "", "provide a postgres cluster name.")
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rootCmd.AddCommand(addDbCmd)
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}
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