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Print docker run stderr in-case of error

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Signed-off-by: Olli Janatuinen <olli.janatuinen@gmail.com>
This commit is contained in:
Olli Janatuinen 2021-05-26 22:55:13 +03:00
parent 6312d58032
commit 49cbe047ce
1 changed files with 4 additions and 2 deletions
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6
src/cmd/linuxkit/moby/docker.go
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@ -35,15 +35,17 @@ func dockerRun(input io.Reader, output io.Writer, img string, args ...string) er
return err return err
} }
var errbuf strings.Builder
args = append([]string{"run", "--network=none", "--log-driver=none", "--rm", "-i", img}, args...) args = append([]string{"run", "--network=none", "--log-driver=none", "--rm", "-i", img}, args...)
cmd := exec.Command(docker, args...) cmd := exec.Command(docker, args...)
cmd.Stderr = &errbuf
cmd.Stdin = input cmd.Stdin = input
cmd.Stdout = output cmd.Stdout = output
cmd.Env = env cmd.Env = env
if err := cmd.Run(); err != nil { if err := cmd.Run(); err != nil {
if exitError, ok := err.(*exec.ExitError); ok { if _, ok := err.(*exec.ExitError); ok {
return fmt.Errorf("docker run %s failed: %v output:\n%s", img, err, exitError.Stderr) return fmt.Errorf("docker run %s failed: %v output:\n%s", img, err, errbuf.String())
} }
return err return err
} }