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.
[v2: a separate aufs commit is merged into this one]
[1] https://github.com/golang/go/blob/f9ed2f75/src/os/path.go
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
There are several bug reports on this error happening, and error is
not helpful unless you read the code. Google brings up removing
the repositories.btrfs file.
Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)
Replaced github.com/docker/libcontainer with
github.com/opencontainers/runc/libcontaier.
Also I moved AppArmor profile generation to docker.
Main idea of this update is to fix mounting cgroups inside containers.
After updating docker on CI we can even remove dind.
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
This adds an event loop for running a GC cleanup for exec command
references that are on the daemon. These cannot be cleaned up
immediately because processes may need to get the exit status of the
exec command but it should not grow out of bounds. The loop is set to a
default 5 minute interval to perform cleanup.
It should be safe to perform this cleanup because unless the clients are
remembering the exec id of the process they launched they can query for
the status and see that it has exited. If they don't save the exec id
they will have to do an inspect on the container for all exec instances
and anything that is not live inside that container will not be returned
in the container inspect.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
libnetwork host, none and bridge driver initialization is incorrectly
disabled if the daemon flag --bridge=none. The expected behavior of
setting --bridge as none is to disable the bridge driver alone and let
all other modes to be operational.
Signed-off-by: Madhu Venugopal <madhu@docker.com>
If no Mtu value is provided to the docker daemon, get the mtu from the
default route's interface. If there is no default route, default to a
mtu of 1500.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
When the daemon is going down trigger immediate
garbage collection of libnetwork resources deleted
like namespace path since there will be no way to
remove them when the daemon restarts.
Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
Fixes a regression from the volumes refactor where the vfs graphdriver
was setting labels for volumes to `s0` so that they can both be written
to by the container and shared with other containers.
When moving away from vfs this was never re-introduced.
Since this needs to happen regardless of volume driver, this is
implemented outside of the driver.
Fixes issue where `z` and `Z` labels are not set for bind-mounts.
Don't lock while creating volumes
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Signed by all authors:
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>
Signed-off-by: David Calavera <david.calavera@gmail.com>
Signed-off-by: Jeff Lindsay <progrium@gmail.com>
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Signed-off-by: Luke Marsden <luke@clusterhq.com>
Signed-off-by: David Calavera <david.calavera@gmail.com>
- Updated Dockerfile to satisfy libnetwork GOPATH requirements.
- Reworked daemon to allocate network resources using libnetwork.
- Reworked remove link code to also update network resources in libnetwork.
- Adjusted the exec driver command population to reflect libnetwork design.
- Adjusted the exec driver create command steps.
- Updated a few test cases to reflect the change in design.
- Removed the dns setup code from docker as resolv.conf is entirely managed
in libnetwork.
- Integrated with lxc exec driver.
Signed-off-by: Jana Radhakrishnan <mrjana@docker.com>
Tibor Vass
John Howard
Kir Kolyshkin
Alexander Morozov
gs11
Dan Walsh
Roman Strashkin
Jessie Frazelle
Michael Crosby
Qiang Huang
Madhu Venugopal
David Calavera
Chun Chen
root
Brian Goff
Arnaud Porterie
Ma Shimiao
Jana Radhakrishnan
Lei Jitang
Eric-Olivier Lamey
Antonio Murdaca
Darren Shepherd
Shishir Mahajan