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builder/docker: show stderr if docker fails to run

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This commit is contained in:
Mitchell Hashimoto 2013-11-09 17:27:30 -08:00
parent 3bbe7024cd
commit 2851e188e1
1 changed files with 5 additions and 0 deletions
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5
builder/docker/driver_docker.go
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@ -67,6 +67,11 @@ func (d *DockerDriver) StartContainer(config *ContainerConfig) (string, error) {
log.Println("Waiting for container to finish starting") log.Println("Waiting for container to finish starting")
if err := cmd.Wait(); err != nil { if err := cmd.Wait(); err != nil {
if _, ok := err.(*exec.ExitError); ok {
err = fmt.Errorf("Docker exited with a non-zero exit status.\nStderr: %s",
stderr.String())
}
return "", err return "", err
} }