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fix validation of non-existing bind-mount source

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Unlike `docker run -v..`, `docker service create --mount`
does not allow bind-mounting non-existing host paths.

This adds validation for the specified `source`, and
produces an error if the path is not found on the
host.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2016-08-08 17:24:00 +02:00
parent 2684459ed4
commit 84d5ab96ef
No known key found for this signature in database
GPG key ID: 76698F39D527CE8C
2 changed files with 30 additions and 3 deletions
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4
daemon/cluster/executor/container/validate.go
View file

@ -2,6 +2,7 @@ package container
import (
"fmt"
"os"
"path/filepath"
"github.com/docker/swarmkit/api"
@ -23,6 +24,9 @@ func validateMounts(mounts []api.Mount) error {
if !filepath.IsAbs(mount.Source) {
return fmt.Errorf("invalid bind mount source, must be an absolute path: %s", mount.Source)
}
if _, err := os.Stat(mount.Source); os.IsNotExist(err) {
return fmt.Errorf("invalid bind mount source, source path not found: %s", mount.Source)
}
case api.MountTypeVolume:
if filepath.IsAbs(mount.Source) {
return fmt.Errorf("invalid volume mount source, must not be an absolute path: %s", mount.Source)

29
daemon/cluster/executor/container/validate_test.go
View file

@ -1,6 +1,8 @@
package container
import (
"io/ioutil"
"os"
"strings"
"testing"
@ -37,10 +39,25 @@ func TestControllerValidateMountBind(t *testing.T) {
t.Fatalf("expected error, got: %v", err)
}
// with proper source
// with non-existing source
if _, err := newTestControllerWithMount(api.Mount{
Type: api.MountTypeBind,
Source: testAbsPath,
Source: "/some-non-existing-host-path/",
Target: testAbsPath,
}); err == nil || !strings.Contains(err.Error(), "invalid bind mount source") {
t.Fatalf("expected error, got: %v", err)
}
// with proper source
tmpdir, err := ioutil.TempDir("", "TestControllerValidateMountBind")
if err != nil {
t.Fatalf("failed to create temp dir: %v", err)
}
defer os.Remove(tmpdir)
if _, err := newTestControllerWithMount(api.Mount{
Type: api.MountTypeBind,
Source: tmpdir,
Target: testAbsPath,
}); err != nil {
t.Fatalf("expected error, got: %v", err)
@ -68,6 +85,12 @@ func TestControllerValidateMountVolume(t *testing.T) {
}
func TestControllerValidateMountTarget(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "TestControllerValidateMountTarget")
if err != nil {
t.Fatalf("failed to create temp dir: %v", err)
}
defer os.Remove(tmpdir)
// with improper target
if _, err := newTestControllerWithMount(api.Mount{
Type: api.MountTypeBind,
@ -80,7 +103,7 @@ func TestControllerValidateMountTarget(t *testing.T) {
// with proper target
if _, err := newTestControllerWithMount(api.Mount{
Type: api.MountTypeBind,
Source: testAbsPath,
Source: tmpdir,
Target: testAbsPath,
}); err != nil {
t.Fatalf("expected no error, got: %v", err)