65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package cluster
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import (
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"bytes"
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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remotecommandconsts "k8s.io/apimachinery/pkg/util/remotecommand"
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"k8s.io/client-go/kubernetes/scheme"
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"k8s.io/client-go/pkg/api/v1"
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"k8s.io/client-go/tools/remotecommand"
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"github.com/zalando-incubator/postgres-operator/pkg/spec"
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)
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//ExecCommand executes arbitrary command inside the pod
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func (c *Cluster) ExecCommand(podName *spec.NamespacedName, command ...string) (string, error) {
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var (
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execOut bytes.Buffer
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execErr bytes.Buffer
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)
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pod, err := c.KubeClient.Pods(podName.Namespace).Get(podName.Name, metav1.GetOptions{})
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if err != nil {
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return "", fmt.Errorf("could not get pod info: %v", err)
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}
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if len(pod.Spec.Containers) != 1 {
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return "", fmt.Errorf("could not determine which container to use")
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}
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req := c.KubeClient.RESTClient.Post().
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Resource("pods").
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Name(podName.Name).
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Namespace(podName.Namespace).
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SubResource("exec")
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req.VersionedParams(&v1.PodExecOptions{
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Container: pod.Spec.Containers[0].Name,
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Command: command,
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Stdout: true,
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Stderr: true,
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}, scheme.ParameterCodec)
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exec, err := remotecommand.NewExecutor(c.RestConfig, "POST", req.URL())
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if err != nil {
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return "", fmt.Errorf("failed to init executor: %v", err)
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}
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err = exec.Stream(remotecommand.StreamOptions{
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SupportedProtocols: remotecommandconsts.SupportedStreamingProtocols,
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Stdout: &execOut,
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Stderr: &execErr,
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})
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if err != nil {
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return "", fmt.Errorf("could not execute: %v", err)
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}
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if execErr.Len() > 0 {
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return "", fmt.Errorf("stderr: %v", execErr.String())
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}
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return execOut.String(), nil
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}
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