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exec.go
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exec.go
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package k8s
import (
"context"
"fmt"
"io"
"github.com/opentracing/opentracing-go"
corev1 "k8s.io/api/core/v1"
"k8s.io/client-go/tools/remotecommand"
"k8s.io/kubernetes/pkg/kubectl/scheme"
"github.com/windmilleng/tilt/internal/container"
)
func (k K8sClient) Exec(ctx context.Context, podID PodID, cName container.Name, n Namespace, cmd []string, stdin io.Reader, stdout io.Writer, stderr io.Writer) error {
span, ctx := opentracing.StartSpanFromContext(ctx, "k8s-Exec")
span.SetTag("cmd", fmt.Sprintf("%v", cmd))
defer span.Finish()
req := k.core.RESTClient().Post().
Resource("pods").
Namespace(n.String()).
Name(podID.String()).
SubResource("exec").
Param("container", cName.String())
req.VersionedParams(&corev1.PodExecOptions{
Container: cName.String(),
Command: cmd,
Stdin: stdin != nil,
Stdout: stdout != nil,
Stderr: stderr != nil,
}, scheme.ParameterCodec)
exec, err := remotecommand.NewSPDYExecutor(k.restConfig, "POST", req.URL())
if err != nil {
return err
}
return exec.Stream(remotecommand.StreamOptions{
Stdin: stdin,
Stdout: stdout,
Stderr: stderr,
})
}