118 lines
3.9 KiB
Go
118 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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"encoding/json"
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"fmt"
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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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"k8s.io/apimachinery/pkg/api/resource"
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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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"log"
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"strconv"
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)
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// extVolumeCmd represents the extVolume command
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var extVolumeCmd = &cobra.Command{
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Use: "ext-volume",
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Short: "Increases the volume size of a given Postgres cluster",
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Long: `Extends the volume of the postgres cluster. But volume cannot be shrinked.`,
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Run: func(cmd *cobra.Command, args []string) {
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clusterName, _ := cmd.Flags().GetString("cluster")
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if len(args) > 0 {
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volume := args[0]
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extVolume(volume, clusterName)
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} else {
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fmt.Println("please enter the cluster name with -c flag & volume in desired units")
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}
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},
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Example: `
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#Extending the volume size of provided cluster
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kubectl pg ext-volume 2Gi -c cluster01
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`,
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}
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// extend volume with provided size & cluster name
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func extVolume(increasedVolumeSize 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(clusterName, metav1.GetOptions{})
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if err != nil {
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log.Fatalf("hii %v", err)
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}
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oldSize, err := resource.ParseQuantity(postgresql.Spec.Volume.Size)
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if err != nil {
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log.Fatal(err)
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}
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newSize, err := resource.ParseQuantity(increasedVolumeSize)
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if err != nil {
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log.Fatal(err)
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}
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_, err = strconv.Atoi(newSize.String())
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if err == nil {
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fmt.Println("provide the valid volume size with respective units i.e Ki, Mi, Gi")
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return
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}
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if newSize.Value() > oldSize.Value() {
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patchInstances := volumePatch(newSize)
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response, err := postgresConfig.Postgresqls(namespace).Patch(postgresql.Name, types.MergePatchType, patchInstances, "")
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if err != nil {
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log.Fatal(err)
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}
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if postgresql.ResourceVersion != response.ResourceVersion {
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fmt.Printf("%s volume is extended to %s.\n", response.Name, increasedVolumeSize)
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} else {
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fmt.Printf("%s volume %s is unchanged.\n", response.Name, postgresql.Spec.Volume.Size)
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}
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} else if newSize.Value() == oldSize.Value() {
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fmt.Println("volume already has the desired size.")
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} else {
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fmt.Printf("volume %s size cannot be shrinked.\n", postgresql.Spec.Volume.Size)
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}
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}
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func volumePatch(volume resource.Quantity) []byte {
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patchData := map[string]map[string]map[string]resource.Quantity{"spec": {"volume": {"size": volume}}}
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patch, err := json.Marshal(patchData)
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if err != nil {
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log.Fatal(err, "unable to parse patch to extend volume")
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}
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return patch
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}
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func init() {
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extVolumeCmd.Flags().StringP("cluster", "c", "", "provide cluster name.")
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rootCmd.AddCommand(extVolumeCmd)
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}
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