When cleaning up IPC mounts, the daemon could log a warning if the IPC mount was not found;
```
cleanup: failed to unmount IPC: umount /var/lib/docker/containers/90f408e26e205d30676655a08504dddc0d17f5713c1dd4654cf67ded7d3bbb63/mounts/shm, flags: 0x2: no such file or directory"
```
These warnings are safe to ignore, but can cause some confusion; `container.UnmountIpcMount()`
already attempted to suppress these warnings, however, `mount.Unmount()` returns a `mountError`,
which nests the original error, therefore detecting failed.
This parch uses `errors.Cause()` to get the _underlying_ error to detect if it's a "is not exist".
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 060f387c0b)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This is the second part to
https://github.com/containerd/containerd/pull/3361 and will help process
delete not block forever when the process exists but the I/O was
inherited by a subprocess that lives on.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
(cherry picked from commit b5f28865ef)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
pborman/uuid and google/uuid used to be different versions of
the same package, but now pborman/uuid is a compatibility wrapper
around google/uuid, maintained by the same person.
Clean up some of the usage as the functions differ slightly.
Not yet removed some uses of pborman/uuid in vendored code but
I have PRs in process for these.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
This import got lost after commit 56cc56b0fa
was merged, likely because the PR was built against an outdated
master.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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>
As standard mount.Unmount does what we need, let's use it.
In addition, this adds ignoring "not mounted" condition, which
was previously implemented (see PR#33329, commit cfa2591d3f)
via a very expensive call to mount.Mounted().
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This allows non-recursive bind-mount, i.e. mount(2) with "bind" rather than "rbind".
Swarm-mode will be supported in a separate PR because of mutual vendoring.
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
This driver uses protobuf to store log messages and has better defaults
for log file handling (e.g. compression and file rotation enabled by
default).
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This implements chown support on Windows. Built-in accounts as well
as accounts included in the SAM database of the container are supported.
NOTE: IDPair is now named Identity and IDMappings is now named
IdentityMapping.
The following are valid examples:
ADD --chown=Guest . <some directory>
COPY --chown=Administrator . <some directory>
COPY --chown=Guests . <some directory>
COPY --chown=ContainerUser . <some directory>
On Windows an owner is only granted the permission to read the security
descriptor and read/write the discretionary access control list. This
fix also grants read/write and execute permissions to the owner.
Signed-off-by: Salahuddin Khan <salah@docker.com>
With a full attach, each attach was leaking 4 goroutines.
This updates attach to use errgroup instead of the hodge-podge of
waitgroups and channels.
In addition, the detach event was never being sent.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
These network operations really don't have anything to do with the
container but rather are setting up the networking.
Ideally these wouldn't get shoved into the daemon package, but doing
something else (e.g. extract a network service into a new package) but
there's a lot more work to do in that regard.
In reality, this probably simplifies some of that work as it moves all
the network operations to the same place.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
1. As daemon.ContainerStop() documentation says,
> If a negative number of seconds is given, ContainerStop
> will wait for a graceful termination.
but since commit cfdf84d5d0 (PR #32237) this is no longer the case.
This happens because `context.WithTimeout(ctx, timeout)` is implemented
as `WithDeadline(ctx, time.Now().Add(timeout))`, resulting in a deadline
which is in the past.
To fix, don't use WithDeadline() if the timeout is negative.
2. Add a test case to validate the correct behavior and
as a means to prevent a similar regression in the future.
3. Fix/improve daemon.ContainerStop() and client.ContainerStop()
description for clarity and completeness.
4. Fix/improve DefaultStopTimeout description.
Fixes: cfdf84d5d0 ("Update Container Wait")
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Since Go 1.7, context is a standard package. Since Go 1.9, everything
that is provided by "x/net/context" is a couple of type aliases to
types in "context".
Many vendored packages still use x/net/context, so vendor entry remains
for now.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The unit test is checking that setting of non-default StopTimeout
works, but it checked the value of StopSignal instead.
Amazingly, the test was working since the default StopSignal is SIGTERM,
which has the numeric value of 15.
Fixes: commit e66d21089 ("Add config parameter to change ...")
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This moves the platform specific stuff in a separate package and keeps
the `volume` package and the defined interfaces light to import.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Commit 7a7357dae1 ("LCOW: Implemented support for docker cp + build")
changed `container.BaseFS` from being a string (that could be empty but
can't lead to nil pointer dereference) to containerfs.ContainerFS,
which could be be `nil` and so nil dereference is at least theoretically
possible, which leads to panic (i.e. engine crashes).
Such a panic can be avoided by carefully analysing the source code in all
the places that dereference a variable, to make the variable can't be nil.
Practically, this analisys are impossible as code is constantly
evolving.
Still, we need to avoid panics and crashes. A good way to do so is to
explicitly check that a variable is non-nil, returning an error
otherwise. Even in case such a check looks absolutely redundant,
further changes to the code might make it useful, and having an
extra check is not a big price to pay to avoid a panic.
This commit adds such checks for all the places where it is not obvious
that container.BaseFS is not nil (which in this case means we do not
call daemon.Mount() a few lines earlier).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: John Howard <jhoward@microsoft.com>
While debugging #32838, it was found (https://github.com/moby/moby/issues/32838#issuecomment-356005845) that the utility VM in some circumstances was crashing. Unfortunately, this was silently thrown away, and as far as the build step (also applies to docker run) was concerned, the exit code was zero and the error was thrown away. Windows containers operate differently to containers on Linux, and there can be legitimate system errors during container shutdown after the init process exits. This PR handles this and passes the error all the way back to the client, and correctly causes a build step running a container which hits a system error to fail, rather than blindly trying to keep going, assuming all is good, and get a subsequent failure on a commit.
With this change, assuming an error occurs, here's an example of a failure which previous was reported as a commit error:
```
The command 'powershell -Command $ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue'; Install-WindowsFeature -Name Web-App-Dev ; Install-WindowsFeature -Name ADLDS; Install-WindowsFeature -Name Web-Mgmt-Compat; Install-WindowsFeature -Name Web-Mgmt-Service; Install-WindowsFeature -Name Web-Metabase; Install-WindowsFeature -Name Web-Lgcy-Scripting; Install-WindowsFeature -Name Web-WMI; Install-WindowsFeature -Name Web-WHC; Install-WindowsFeature -Name Web-Scripting-Tools; Install-WindowsFeature -Name Web-Net-Ext45; Install-WindowsFeature -Name Web-ASP; Install-WindowsFeature -Name Web-ISAPI-Ext; Install-WindowsFeature -Name Web-ISAPI-Filter; Install-WindowsFeature -Name Web-Default-Doc; Install-WindowsFeature -Name Web-Dir-Browsing; Install-WindowsFeature -Name Web-Http-Errors; Install-WindowsFeature -Name Web-Static-Content; Install-WindowsFeature -Name Web-Http-Redirect; Install-WindowsFeature -Name Web-DAV-Publishing; Install-WindowsFeature -Name Web-Health; Install-WindowsFeature -Name Web-Http-Logging; Install-WindowsFeature -Name Web-Custom-Logging; Install-WindowsFeature -Name Web-Log-Libraries; Install-WindowsFeature -Name Web-Request-Monitor; Install-WindowsFeature -Name Web-Http-Tracing; Install-WindowsFeature -Name Web-Stat-Compression; Install-WindowsFeature -Name Web-Dyn-Compression; Install-WindowsFeature -Name Web-Security; Install-WindowsFeature -Name Web-Windows-Auth; Install-WindowsFeature -Name Web-Basic-Auth; Install-WindowsFeature -Name Web-Url-Auth; Install-WindowsFeature -Name Web-WebSockets; Install-WindowsFeature -Name Web-AppInit; Install-WindowsFeature -Name NET-WCF-HTTP-Activation45; Install-WindowsFeature -Name NET-WCF-Pipe-Activation45; Install-WindowsFeature -Name NET-WCF-TCP-Activation45;' returned a non-zero code: 4294967295: container shutdown failed: container ba9c65054d42d4830fb25ef55e4ab3287550345aa1a2bb265df4e5bfcd79c78a encountered an error during WaitTimeout: failure in a Windows system call: The compute system exited unexpectedly. (0xc0370106)
```
Without this change, it would be incorrectly reported such as in this comment: https://github.com/moby/moby/issues/32838#issuecomment-309621097
```
Step 3/8 : ADD buildtools C:/buildtools
re-exec error: exit status 1: output: time="2017-06-20T11:37:38+10:00" level=error msg="hcsshim::ImportLayer failed in Win32: The system cannot find the path specified. (0x3) layerId=\\\\?\\C:\\ProgramData\\docker\\windowsfilter\\b41d28c95f98368b73fc192cb9205700e21
6691495c1f9ac79b9b04ec4923ea2 flavour=1 folder=C:\\Windows\\TEMP\\hcs232661915"
hcsshim::ImportLayer failed in Win32: The system cannot find the path specified. (0x3) layerId=\\?\C:\ProgramData\docker\windowsfilter\b41d28c95f98368b73fc192cb9205700e216691495c1f9ac79b9b04ec4923ea2 flavour=1 folder=C:\Windows\TEMP\hcs232661915
```
This fixes an issue where the container LogPath was empty when the
non-blocking logging mode was enabled. This change sets the LogPath on
the container as soon as the path is generated, instead of setting the
LogPath on a logger struct and then attempting to pull it off that
logger at a later point. That attempt to pull the LogPath off the logger
was error prone since it assumed that the logger would only ever be a
single type.
Prior to this change docker inspect returned an empty string for
LogPath. This caused issues with tools that rely on docker inspect
output to discover container logs, e.g. Kubernetes.
This commit also removes some LogPath methods that are now unnecessary
and are never invoked.
Signed-off-by: junzhe and mnussbaum <code@getbraintree.com>
On unix, merge secrets/configs handling. This is important because
configs can contain secrets (via templating) and potentially a config
could just simply have secret information "by accident" from the user.
This just make sure that configs are as secure as secrets and de-dups a
lot of code.
Generally this makes everything simpler and configs more secure.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
It's a common scenario for admins and/or monitoring applications to
mount in the daemon root dir into a container. When doing so all mounts
get coppied into the container, often with private references.
This can prevent removal of a container due to the various mounts that
must be configured before a container is started (for example, for
shared /dev/shm, or secrets) being leaked into another namespace,
usually with private references.
This is particularly problematic on older kernels (e.g. RHEL < 7.4)
where a mount may be active in another namespace and attempting to
remove a mountpoint which is active in another namespace fails.
This change moves all container resource mounts into a common directory
so that the directory can be made unbindable.
What this does is prevents sub-mounts of this new directory from leaking
into other namespaces when mounted with `rbind`... which is how all
binds are handled for containers.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
