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Fix --volumes-from mount failure

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As explained in https://github.com/dotcloud/docker/issues/4979
--volumes-from fails with ENOFILE errors.

This is because the code tries to look at the "from" volume without
ensuring that it is mounted yet. We fix this by mounting the containers
before stating in it.

Also includes a regression test.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
This commit is contained in:
Alexander Larsson 2014-04-03 16:27:07 +02:00
parent be882d989a
commit bd94f84ded
2 changed files with 24 additions and 1 deletions
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18
integration-cli/docker_cli_run_test.go
View file

@ -272,6 +272,24 @@ func TestDockerRunWithVolumesAsFiles(t *testing.T) {
logDone("run - regression test for #4741 - volumes from as files")
}
// Regression test for #4979
func TestDockerRunWithVolumesFromExited(t *testing.T) {
runCmd := exec.Command(dockerBinary, "run", "--name", "test-data", "--volume", "/some/dir", "busybox", "touch", "/some/dir/file")
out, stderr, exitCode, err := runCommandWithStdoutStderr(runCmd)
if err != nil && exitCode != 0 {
t.Fatal("1", out, stderr, err)
}
runCmd = exec.Command(dockerBinary, "run", "--volumes-from", "test-data", "busybox", "cat", "/some/dir/file")
out, stderr, exitCode, err = runCommandWithStdoutStderr(runCmd)
if err != nil && exitCode != 0 {
t.Fatal("2", out, stderr, err)
}
deleteAllContainers()
logDone("run - regression test for #4979 - volumes-from on exited container")
}
// Regression test for #4830
func TestDockerRunWithRelativePath(t *testing.T) {
runCmd := exec.Command(dockerBinary, "run", "-v", "tmp:/other-tmp", "busybox", "true")

7
runtime/volumes.go
View file

@ -81,9 +81,14 @@ func applyVolumesFrom(container *Container) error {
c := container.runtime.Get(specParts[0])
if c == nil {
return fmt.Errorf("Container %s not found. Impossible to mount its volumes", container.ID)
return fmt.Errorf("Container %s not found. Impossible to mount its volumes", specParts[0])
}
if err := c.Mount(); err != nil {
return fmt.Errorf("Container %s failed to mount. Impossible to mount its volumes", specParts[0])
}
defer c.Unmount()
for volPath, id := range c.Volumes {
if _, exists := container.Volumes[volPath]; exists {
continue