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Fix create volume in a directory which is a symbolic link

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Signed-off-by: Lei Jitang <leijitang@huawei.com>
This commit is contained in:
Lei Jitang 2015-03-29 13:35:36 +08:00
parent da5c863d20
commit 7583b49125
2 changed files with 42 additions and 3 deletions
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9
daemon/volumes.go
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@ -189,10 +189,13 @@ func (container *Container) parseVolumeMountConfig() (map[string]*Mount, error)
if _, exists := container.Volumes[path]; exists {
continue
}
if stat, err := os.Stat(filepath.Join(container.basefs, path)); err == nil {
realpath, err := symlink.FollowSymlinkInScope(filepath.Join(container.basefs, path), container.basefs)
if err != nil {
return nil, fmt.Errorf("failed to evaluate the absolute path of symlink")
}
if stat, err := os.Stat(realpath); err == nil {
if !stat.IsDir() {
return nil, fmt.Errorf("file exists at %s, can't create volume there")
return nil, fmt.Errorf("file exists at %s, can't create volume there", realpath)
}
}

36
integration-cli/docker_cli_run_test.go
View file

@ -477,6 +477,42 @@ func TestRunWithVolumesFromExited(t *testing.T) {
logDone("run - regression test for #4979 - volumes-from on exited container")
}
// Test create volume in a dirctory which is a symbolic link
func TestRunCreateVolumesInSymlinkDir(t *testing.T) {
defer deleteAllContainers()
// This test has to create a file on host
hostFile := "/tmp/abcd"
cmd := exec.Command("touch", hostFile)
if out, _, err := runCommandWithOutput(cmd); err != nil {
t.Fatalf("failed to create file %s on host: %v, output: %q", hostFile, err, out)
}
defer func() {
cmd := exec.Command("rm", "-f", hostFile)
if out, _, err := runCommandWithOutput(cmd); err != nil {
t.Fatalf("failed to remove file %s on host: %v, output: %q", hostFile, err, out)
}
}()
// create symlink directory /home/test link to /tmp
cmd = exec.Command(dockerBinary, "run", "--name=test", "busybox", "ln", "-s", "/tmp", "/home/test")
if out, _, err := runCommandWithOutput(cmd); err != nil {
t.Fatalf("failed to run container: %v, output: %q", err, out)
}
cmd = exec.Command(dockerBinary, "commit", "test", "busybox:test")
out, _, err := runCommandWithOutput(cmd)
if err != nil {
t.Fatalf("failed to commit container: %v, output: %q", err, out)
}
cleanedImageID := stripTrailingCharacters(out)
defer deleteImages(cleanedImageID)
// directory /home/test is link to /tmp, /home/test/abcd==/tmp/abcd
cmd = exec.Command(dockerBinary, "run", "-v", "/home/test/abcd", "busybox", "touch", "/home/test/abcd/Hello")
if out, _, err = runCommandWithOutput(cmd); err != nil {
t.Fatalf("failed to create volume in symlink directory: %v, output %q", err, out)
}
logDone("run - create volume in symlink directory")
}
// Regression test for #4830
func TestRunWithRelativePath(t *testing.T) {
defer deleteAllContainers()