62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
package controller
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
|
|
"k8s.io/client-go/pkg/api"
|
|
"k8s.io/kubernetes/pkg/client/unversioned/remotecommand"
|
|
remotecommandconsts "k8s.io/apimachinery/pkg/util/remotecommand"
|
|
|
|
"github.bus.zalan.do/acid/postgres-operator/pkg/spec"
|
|
)
|
|
|
|
func (c *Controller) ExecCommand(podName spec.NamespacedName, command []string) (string, error) {
|
|
var (
|
|
execOut bytes.Buffer
|
|
execErr bytes.Buffer
|
|
)
|
|
|
|
pod, err := c.KubeClient.Pods(podName.Namespace).Get(podName.Name)
|
|
if err != nil {
|
|
return "", fmt.Errorf("Can't get Pod info: %s", err)
|
|
}
|
|
|
|
if len(pod.Spec.Containers) != 1 {
|
|
return "", fmt.Errorf("Can't determine which container to use")
|
|
}
|
|
|
|
req := c.RestClient.Post().
|
|
Resource("pods").
|
|
Name(podName.Name).
|
|
Namespace(podName.Namespace).
|
|
SubResource("exec")
|
|
req.VersionedParams(&api.PodExecOptions{
|
|
Container: pod.Spec.Containers[0].Name,
|
|
Command: command,
|
|
Stdout: true,
|
|
Stderr: true,
|
|
}, api.ParameterCodec)
|
|
|
|
exec, err := remotecommand.NewExecutor(c.RestConfig, "POST", req.URL())
|
|
if err != nil {
|
|
return "", fmt.Errorf("Failed to init executor: %s", err)
|
|
}
|
|
|
|
err = exec.Stream(remotecommand.StreamOptions{
|
|
SupportedProtocols: remotecommandconsts.SupportedStreamingProtocols,
|
|
Stdout: &execOut,
|
|
Stderr: &execErr,
|
|
})
|
|
|
|
if err != nil {
|
|
return "", fmt.Errorf("Can't execute: %s", err)
|
|
}
|
|
|
|
if execErr.Len() > 0 {
|
|
return "", fmt.Errorf("Stderr: %s", execErr.String())
|
|
}
|
|
|
|
return execOut.String(), nil
|
|
}
|