This function was previously used on the client to validate
tmpfs options, but is no longer used since
b9b8d8b364, as this validation
is platform-specific, so should be handled by the daemon.
Removing this function as it's no longer used anywhere.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Please refer to `docs/rootless.md`.
TLDR:
* Make sure `/etc/subuid` and `/etc/subgid` contain the entry for you
* `dockerd-rootless.sh --experimental`
* `docker -H unix://$XDG_RUNTIME_DIR/docker.sock run ...`
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
As reported in docker/for-linux/issues/484, since Docker 18.06
docker cp with a destination file name fails with the following error:
> archive/tar: cannot encode header: Format specifies USTAR; and USTAR cannot encode Name="a_very_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx_long_filename_that_is_101_characters"
The problem is caused by changes in Go 1.10 archive/tar, which
mis-guesses the tar stream format as USTAR (rather than PAX),
which, in turn, leads to inability to specify file names
longer than 100 characters.
This tar stream is sent by TarWithOptions() (which, since we switched to
Go 1.10, explicitly sets format=PAX for every file, see FileInfoHeader(),
and before Go 1.10 it was PAX by default). Unfortunately, the receiving
side, RebaseArchiveEntries(), which calls tar.Next(), mistakenly guesses
header format as USTAR, which leads to the above error.
The fix is easy: set the format to PAX in RebaseArchiveEntries()
where we read the tar stream and change the file name.
A unit test is added to prevent future regressions.
NOTE this code is not used by dockerd, but rather but docker cli
(also possibly other clients), so this needs to be re-vendored
to cli in order to take effect.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
RHEL/CentOS 3.10 kernels report that kernel-memory accounting is supported,
but it actually does not work.
Runc (when compiled for those kernels) will be compiled without kernel-memory
support, so even though the daemon may be reporting that it's supported,
it actually is not.
This cause tests to fail when testing against a daemon that's using a runc
version without kmem support.
For now, skip these tests based on the kernel version reported by the daemon.
This should fix failures such as:
```
FAIL: /go/src/github.com/docker/docker/integration-cli/docker_cli_run_unix_test.go:499: DockerSuite.TestRunWithKernelMemory
assertion failed:
Command: /usr/bin/docker run --kernel-memory 50M --name test1 busybox cat /sys/fs/cgroup/memory/memory.kmem.limit_in_bytes
ExitCode: 0
Error: <nil>
Stdout: 9223372036854771712
Stderr: WARNING: You specified a kernel memory limit on a kernel older than 4.0. Kernel memory limits are experimental on older kernels, it won't work as expected and can cause your system to be unstable.
Failures:
Expected stdout to contain "52428800"
FAIL: /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:125: DockerSuite.TestUpdateKernelMemory
/go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:136:
...open /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go: no such file or directory
... obtained string = "9223372036854771712"
... expected string = "104857600"
----------------------------------------------------------------------
FAIL: /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:139: DockerSuite.TestUpdateKernelMemoryUninitialized
/go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go:149:
...open /go/src/github.com/docker/docker/integration-cli/docker_cli_update_unix_test.go: no such file or directory
... value = nil
```
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
* Replaces `cocks` with `cerf` as the former might be perceived as
offensive by some people (as pointed out by @jeking3
[here](https://github.com/moby/moby/pull/37157#commitcomment-31758059))
* Removes a duplicate entry for `burnell`
* Re-arranges the entry for `sutherland` to ensure that the names are in
sorted order
* Adds entries for `shamir` and `wilbur`
Signed-off-by: Debayan De <debayande@users.noreply.github.com>
The errors returned from Mount and Unmount functions are raw
syscall.Errno errors (like EPERM or EINVAL), which provides
no context about what has happened and why.
Similar to os.PathError type, introduce mount.Error type
with some context. The error messages will now look like this:
> mount /tmp/mount-tests/source:/tmp/mount-tests/target, flags: 0x1001: operation not permitted
or
> mount tmpfs:/tmp/mount-test-source-516297835: operation not permitted
Before this patch, it was just
> operation not permitted
[v2: add Cause()]
[v3: rename MountError to Error, document Cause()]
[v4: fixes; audited all users]
[v5: make Error type private; changes after @cpuguy83 reviews]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
It has been pointed out that we're ignoring EINVAL from umount(2)
everywhere, so let's move it to a lower-level function. Also, its
implementation should be the same for any UNIX incarnation, so
let's consolidate it.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
syscall.Stat (and Lstat), unlike functions from os pkg,
return "raw" errors (like EPERM or EINVAL), and those are
propagated up the function call stack unchanged, and gets
logged and/or returned to the user as is.
Wrap those into os.PathError{} so the error message will
at least have function name and file name.
Note we use Capitalized function names to distinguish
between functions in os and ours.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Ubuntu kernel supports overlayfs in user namespaces.
However, Docker had previously crafting overlay opaques directly
using mknod(2) and setxattr(2), which are not supported in userns.
Tested with LXD, Ubuntu 18.04, kernel 4.15.0-36-generic #39-Ubuntu.
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
This fix tries to address the issue raised in 37038 where
there were no memory.kernelTCP support for linux.
This fix add MemoryKernelTCP to HostConfig, and pass
the config to runtime-spec.
Additional test case has been added.
This fix fixes 37038.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Signed-off-by: John Howard <jhoward@microsoft.com>
If fixes an error in sameFsTime which was using `==` to compare two times. The correct way is to use go's built-in timea.Equals(timeb).
In changes_windows, it uses sameFsTime to compare mTim of a `system.StatT` to allow TestChangesDirsMutated to operate correctly now.
Note there is slight different between the Linux and Windows implementations of detecting changes. Due to https://github.com/moby/moby/issues/9874,
and the fix at https://github.com/moby/moby/pull/11422, Linux does not consider a change to the directory time as a change. Windows on NTFS
does. See https://github.com/moby/moby/pull/37982 for more information. The result in `TestChangesDirsMutated`, `dir3` is NOT considered a change
in Linux, but IS considered a change on Windows. The test mutates dir3 to have a mtime of +1 second.
With a handful of tests still outstanding, this change ports most of the unit tests under pkg/archive to Windows.
It provides an implementation of `copyDir` in tests for Windows. To make a copy similar to Linux's `cp -a` while preserving timestamps
and links to both valid and invalid targets, xcopy isn't sufficient. So I used robocopy, but had to circumvent certain exit codes that
robocopy exits with which are warnings. Link to article describing this is in the code.
This function ensures the argument is the mount point
(i.e. if it's not, it bind mounts it to itself).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
1. There is no need to specify rw argument -- bind mounts are
read-write by default.
2. There is no point in parsing /proc/self/mountinfo after performing
a mount, especially if we don't check whether the fs is mounted or
not -- the only outcome from it could be an error from our mountinfo
parser, which makes no sense in this context.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Using a value such as `--cpuset-mems=1-9223372036854775807` would cause
`dockerd` to run out of memory allocating a map of the values in the
validation code. Set limits to the normal limit of the number of CPUs,
and improve the error handling.
Reported by Huawei PSIRT.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This should eliminate a bunch of new (go-1.11 related) validation
errors telling that the code is not formatted with `gofmt -s`.
No functional change, just whitespace (i.e.
`git show --ignore-space-change` shows nothing).
Patch generated with:
> git ls-files | grep -v ^vendor/ | grep .go$ | xargs gofmt -s -w
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The code in Close() that removes the watches was not working,
because it first sets `w.closed = true` and then calls w.close(),
which starts with
```
if w.closed {
return errPollerClosed
}
```
Fix by setting w.closed only after calling w.remove() for all the
files being watched.
While at it, remove the duplicated `delete(w.watches, name)` code.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
There is no need to wait for up to 200ms in order to close
the file descriptor once the chClose is received.
This commit might reduce the chances for occasional "The process
cannot access the file because it is being used by another process"
error on Windows, where an opened file can't be removed.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
