143 lines
4.5 KiB
Go
143 lines
4.5 KiB
Go
/*
|
|
Copyright © 2019 Vineeth Pothulapati <vineethpothulapati@outlook.com>
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
THE SOFTWARE.
|
|
*/
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"github.com/spf13/cobra"
|
|
"k8s.io/client-go/kubernetes"
|
|
"k8s.io/client-go/rest"
|
|
"k8s.io/client-go/tools/remotecommand"
|
|
"log"
|
|
"os"
|
|
user "os/user"
|
|
)
|
|
|
|
// connectCmd represents the kubectl pg connect command
|
|
var connectCmd = &cobra.Command{
|
|
Use: "connect",
|
|
Short: "Connects to the shell prompt, psql prompt of postgres cluster",
|
|
Long: `Connects to the shell prompt, psql prompt of postgres cluster and also to specified replica or master.`,
|
|
Run: func(cmd *cobra.Command, args []string) {
|
|
clusterName, _ := cmd.Flags().GetString("cluster")
|
|
master, _ := cmd.Flags().GetBool("master")
|
|
replica, _ := cmd.Flags().GetString("replica")
|
|
psql, _ := cmd.Flags().GetBool("psql")
|
|
userName, _ := cmd.Flags().GetString("user")
|
|
dbName, _ := cmd.Flags().GetString("database")
|
|
|
|
if psql {
|
|
if userName == "" {
|
|
userInfo, err := user.Current()
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
userName = userInfo.Username
|
|
}
|
|
}
|
|
if dbName == "" {
|
|
dbName = userName
|
|
}
|
|
|
|
connect(clusterName, master, replica, psql, userName, dbName)
|
|
},
|
|
Example: `
|
|
#connects to the master of postgres cluster
|
|
kubectl pg connect -c cluster -m
|
|
|
|
#connects to the random replica of postgres cluster
|
|
kubectl pg connect -c cluster
|
|
|
|
#connects to the provided replica number of postgres cluster
|
|
kubectl pg connect -c cluster -r 2
|
|
|
|
#connects to psql prompt of master for provided postgres cluster with current shell user
|
|
kubectl pg connect -c cluster -p -m
|
|
|
|
#connects to psql prompt of random replica for provided postgres cluster with provided user and db
|
|
kubectl pg connect -c cluster -p -u user01 -d db01
|
|
`,
|
|
}
|
|
|
|
func connect(clusterName string, master bool, replica string, psql bool, user string, dbName string) {
|
|
config := getConfig()
|
|
client, er := kubernetes.NewForConfig(config)
|
|
if er != nil {
|
|
log.Fatal(er)
|
|
}
|
|
|
|
podName := getPodName(clusterName, master, replica)
|
|
execRequest := &rest.Request{}
|
|
|
|
if psql {
|
|
execRequest = client.CoreV1().RESTClient().Post().Resource("pods").
|
|
Name(podName).
|
|
Namespace(getCurrentNamespace()).
|
|
SubResource("exec").
|
|
Param("container", "postgres").
|
|
Param("command", "psql").
|
|
Param("command", dbName).
|
|
Param("command", user).
|
|
Param("stdin", "true").
|
|
Param("stdout", "true").
|
|
Param("stderr", "true").
|
|
Param("tty", "true")
|
|
} else {
|
|
execRequest = client.CoreV1().RESTClient().Post().Resource("pods").
|
|
Name(podName).
|
|
Namespace(getCurrentNamespace()).
|
|
SubResource("exec").
|
|
Param("container", "postgres").
|
|
Param("command", "su").
|
|
Param("command", "postgres").
|
|
Param("stdin", "true").
|
|
Param("stdout", "true").
|
|
Param("stderr", "true").
|
|
Param("tty", "true")
|
|
}
|
|
|
|
exec, err := remotecommand.NewSPDYExecutor(config, "POST", execRequest.URL())
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
err = exec.Stream(remotecommand.StreamOptions{
|
|
Stdin: os.Stdin,
|
|
Stdout: os.Stdout,
|
|
Stderr: os.Stderr,
|
|
Tty: true,
|
|
})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func init() {
|
|
connectCmd.Flags().StringP("cluster", "c", "", "provide the cluster name.")
|
|
connectCmd.Flags().BoolP("master", "m", false, "connect to master.")
|
|
connectCmd.Flags().StringP("replica", "r", "", "connect to replica. Specify replica number.")
|
|
connectCmd.Flags().BoolP("psql", "p", false, "connect to psql prompt.")
|
|
connectCmd.Flags().StringP("user", "u", "", "provide user.")
|
|
connectCmd.Flags().StringP("database", "d", "", "provide database name.")
|
|
rootCmd.AddCommand(connectCmd)
|
|
}
|