If mknod() returns ENOSYS, it most probably means quota is not supported
here, so return the appropriate error.
This is a conservative* fix to regression in vfs graph driver introduced
by commit 7a1618ced3 ("add quota support to VFS graphdriver").
On some filesystems, vfs fails to init with the following error:
> Error starting daemon: error initializing graphdriver: Failed to mknod
> /go/src/github.com/docker/docker/bundles/test-integration/d6bcf6de610e9/root/vfs/backingFsBlockDev:
> function not implemented
Reported-by: Brian Goff <cpuguy83@gmail.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
With the contianerd 1.0 migration we now have strongly typed errors that
we can check for process not found.
We also had some bad error checks looking for `ESRCH` which would only
be returned from `unix.Kill` and never from containerd even though we
were checking containerd responses for it.
Fixes some race conditions around process handling and our error checks
that could lead to errors that propagate up to the user that should not.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
The `repository:shortid` syntax for referencing images is very little used,
collides with with tag references can be confused with digest references.
The `repository:shortid` notation was deprecated in Docker 1.13 through
5fc71599a0, and scheduled for removal
in Docker 17.12.
This patch removes the support for this notation.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The overlay2 driver was not setting up the archive.TarOptions field
properly like other storage backend routes to "applyTarLayer"
functionality. The InUserNS field is populated now for overlay2 using
the same query function used by the other storage drivers.
Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>
We are planning to remove supports for non-Linux platform in
runc (https://github.com/opencontainers/runc/pull/1654). The current
import here is the only thing that i found in docker that is windows-related
so fixing this would remove the rest of windows code in runc.
This changes some functions in daemon_windows to be the same as
daemon_unix to use runtime-spec public API instead of runc.
Signed-off-by: Daniel Dao <dqminh89@gmail.com>
Right now we only log source and destination (and demsg) if mount operation
fails. fstype and mount options are available easily. It probably is a good
idea to log these as well. Especially sometimes failures can happen due to
mount options.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
This change adds a Platform struct with a Name field and a general
Components field to the Version API type. This will allow API
consumers to show version information for the whole platform and
it will allow API providers to set the versions for the various
components of the platform.
All changes here are backwards compatible.
Signed-off-by: Tibor Vass <tibor@docker.com>
Add a new configuration option to allow the enabling
of the networkDB debug. The option is only parsed using the
reload event. This will protect the daemon on start or restart
if the option is left behind in the config file
Signed-off-by: Flavio Crisciani <flavio.crisciani@docker.com>
Even though it's highly discouraged, there are existing
installs that are running overlay/overlay2 on filesystems
without d_type support.
This patch allows the daemon to start in such cases, instead of
refusing to start without an option to override.
For fresh installs, backing filesystems without d_type support
will still cause the overlay/overlay2 drivers to be marked as
"unsupported", and skipped during the automatic selection.
This feature is only to keep backward compatibility, but
will be removed at some point.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Support for running overlay/overlay2 on a backing filesystem
without d_type support (most likely: xfs, as ext4 supports
this by default), was deprecated for some time.
Running without d_type support is problematic, and can
lead to difficult to debug issues ("invalid argument" errors,
or unable to remove files from the container's filesystem).
This patch turns the warning that was previously printed
into an "unsupported" error, so that the overlay/overlay2
drivers are not automatically selected when detecting supported
storage drivers.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The fsmagic check was always performed on "data-root" (`/var/lib/docker`),
not on the storage-driver's home directory (e.g. `/var/lib/docker/<somedriver>`).
This caused detection to be done on the wrong filesystem in situations
where `/var/lib/docker/<somedriver>` was a mount, and a different
filesystem than `/var/lib/docker` itself.
This patch checks if the storage-driver's home directory exists, and only
falls back to `/var/lib/docker` if it doesn't exist.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Previously, the code would set the mtime on the directories before
creating files in the directory itself. This was problematic
because it resulted in the mtimes on the directories being
incorrectly set. This change makes it so that the mtime is
set only _after_ all of the files have been created.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
The error type libnetwork.ErrNoSuchNetwork is used in the controller
to retry the network creation as a managed network though the manager.
The change of the type was breaking the logic causing the network to
not being created anymore so that no new container on that network
was able to be launched
Added unit test
Signed-off-by: Flavio Crisciani <flavio.crisciani@docker.com>
There was a small issue here, where it copied the data using
traditional mechanisms, even when copy_file_range was successful.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
This change makes the VFS graphdriver use the kernel-accelerated
(copy_file_range) mechanism of copying files, which is able to
leverage reflinks.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Previously, graphdriver/copy would improperly copy hardlinks as just regular
files. This patch changes that behaviour, and instead the code now keeps
track of inode numbers, and if it sees the same inode number again
during the copy loop, it hardlinks it, instead of copying it.
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
The overlay2 storage-driver requires multiple lower dir
support for overlayFs. Support for this feature was added
in kernel 4.x, but some distros (RHEL 7.4, CentOS 7.4) ship with
an older kernel with this feature backported.
This patch adds feature-detection for multiple lower dirs,
and will perform this feature-detection on pre-4.x kernels
with overlayFS support.
With this patch applied, daemons running on a kernel
with multiple lower dir support will now select "overlay2"
as storage-driver, instead of falling back to "overlay".
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This subtle bug keeps lurking in because error checking for `Mkdir()`
and `MkdirAll()` is slightly different wrt to `EEXIST`/`IsExist`:
- for `Mkdir()`, `IsExist` error should (usually) be ignored
(unless you want to make sure directory was not there before)
as it means "the destination directory was already there"
- for `MkdirAll()`, `IsExist` error should NEVER be ignored.
Mostly, this commit just removes ignoring the IsExist error, as it
should not be ignored.
Also, there are a couple of cases then IsExist is handled as
"directory already exist" which is wrong. As a result, some code
that never worked as intended is now removed.
NOTE that `idtools.MkdirAndChown()` behaves like `os.MkdirAll()`
rather than `os.Mkdir()` -- so its description is amended accordingly,
and its usage is handled as such (i.e. IsExist error is not ignored).
For more details, a quote from my runc commit 6f82d4b (July 2015):
TL;DR: check for IsExist(err) after a failed MkdirAll() is both
redundant and wrong -- so two reasons to remove it.
Quoting MkdirAll documentation:
> MkdirAll creates a directory named path, along with any necessary
> parents, and returns nil, or else returns an error. If path
> is already a directory, MkdirAll does nothing and returns nil.
This means two things:
1. If a directory to be created already exists, no error is
returned.
2. If the error returned is IsExist (EEXIST), it means there exists
a non-directory with the same name as MkdirAll need to use for
directory. Example: we want to MkdirAll("a/b"), but file "a"
(or "a/b") already exists, so MkdirAll fails.
The above is a theory, based on quoted documentation and my UNIX
knowledge.
3. In practice, though, current MkdirAll implementation [1] returns
ENOTDIR in most of cases described in #2, with the exception when
there is a race between MkdirAll and someone else creating the
last component of MkdirAll argument as a file. In this very case
MkdirAll() will indeed return EEXIST.
Because of #1, IsExist check after MkdirAll is not needed.
Because of #2 and #3, ignoring IsExist error is just plain wrong,
as directory we require is not created. It's cleaner to report
the error now.
Note this error is all over the tree, I guess due to copy-paste,
or trying to follow the same usage pattern as for Mkdir(),
or some not quite correct examples on the Internet.
[1] https://github.com/golang/go/blob/f9ed2f75/src/os/path.go
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
