144 lines
4.2 KiB
Go
144 lines
4.2 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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"io"
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"log"
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"os"
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"github.com/spf13/cobra"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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)
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// logsCmd represents the logs command
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var logsCmd = &cobra.Command{
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Use: "logs",
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Short: "This will fetch the logs of the specified postgres cluster & postgres operator",
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Long: `Fetches the logs of the postgres cluster (i.e master( with -m flag) & replica with (-r 1 pod number) and without -m or -r connects to random replica`,
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Run: func(cmd *cobra.Command, args []string) {
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opLogs, _ := cmd.Flags().GetBool("operator")
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clusterName, _ := cmd.Flags().GetString("cluster")
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master, _ := cmd.Flags().GetBool("master")
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replica, _ := cmd.Flags().GetString("replica")
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if opLogs {
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operatorLogs()
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} else {
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clusterLogs(clusterName, master, replica)
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}
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},
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Example: `
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#Fetch the logs of the postgres operator
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kubectl pg logs -o
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#Fetch the logs of the master for provided cluster
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kubectl pg logs -c cluster01 -m
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#Fetch the logs of the random replica for provided cluster
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kubectl pg logs -c cluster01
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#Fetch the logs of the provided replica number of the cluster
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kubectl pg logs -c cluster01 -r 3
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`,
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}
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func operatorLogs() {
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config := getConfig()
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client, err := kubernetes.NewForConfig(config)
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if err != nil {
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log.Fatal(err)
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}
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operator := getPostgresOperator(client)
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allPods, err := client.CoreV1().Pods(operator.Namespace).List(context.TODO(), metav1.ListOptions{})
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if err != nil {
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log.Fatal(err)
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}
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var operatorPodName string
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for _, pod := range allPods.Items {
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for key, value := range pod.Labels {
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if (key == "name" && value == OperatorName) || (key == "app.kubernetes.io/name" && value == OperatorName) {
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operatorPodName = pod.Name
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break
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}
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}
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}
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execRequest := client.CoreV1().RESTClient().Get().Namespace(operator.Namespace).
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Name(operatorPodName).
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Resource("pods").
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SubResource("log").
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Param("follow", "--follow").
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Param("container", OperatorName)
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readCloser, err := execRequest.Stream(context.TODO())
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if err != nil {
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log.Fatal(err)
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}
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defer readCloser.Close()
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_, err = io.Copy(os.Stdout, readCloser)
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if err != nil {
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log.Fatal(err)
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}
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}
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func clusterLogs(clusterName string, master bool, replica string) {
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config := getConfig()
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client, err := kubernetes.NewForConfig(config)
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if err != nil {
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log.Fatal(err)
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}
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podName := getPodName(clusterName, master, replica)
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execRequest := client.CoreV1().RESTClient().Get().Namespace(getCurrentNamespace()).
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Name(podName).
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Resource("pods").
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SubResource("log").
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Param("follow", "--follow").
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Param("container", "postgres")
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readCloser, err := execRequest.Stream(context.TODO())
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if err != nil {
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log.Fatal(err)
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}
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defer readCloser.Close()
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_, err = io.Copy(os.Stdout, readCloser)
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if err != nil {
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log.Fatal(err)
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}
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}
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func init() {
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rootCmd.AddCommand(logsCmd)
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logsCmd.Flags().BoolP("operator", "o", false, "logs of operator")
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logsCmd.Flags().StringP("cluster", "c", "", "logs for the provided cluster")
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logsCmd.Flags().BoolP("master", "m", false, "Patroni logs of master")
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logsCmd.Flags().StringP("replica", "r", "", "Patroni logs of replica. Specify replica number.")
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}
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