Instead of using a global store for volume drivers, scope the driver
store to the caller (e.g. the volume store). This makes testing much
simpler.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Since the volume store already provides this functionality, we should
just use it rather than duplicating it.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Add synchronization around adding logs to a plugin
and reading those logs. Without the follow configuration,
a race occurs between go routines to add the logs into
the plugin and read the logs out of the plugin. This
adds a function to synchronize the action to avoid the
race.
Removes use of file for buffering, instead buffering whole
messages so log count can be checked discretely.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Docker daemon has a 16K buffer for log messages. If a message length
exceeds 16K, it should be split by the logger and merged at the
endpoint.
This change adds `PartialLogMetaData` struct for enhanced partial support
- LastPartial (bool) : indicates if this is the last of all partials.
- ID (string) : unique 32 bit ID. ID is same across all partials.
- Ordinal (int starts at 1) : indicates the position of msg in the series of partials.
Also, the timestamps across partials in the same.
Signed-off-by: Anusha Ragunathan <anusha.ragunathan@docker.com>
It does not make any sense to vary this based on whether the
rootfs is read only. We removed all the other mount dependencies
on read-only eg see #35344.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
We have seen a panic when re-joining a node to a swarm cluster. The
cause of the issue is unknown, so we just need to add a test for nil
objects and log when we get the condition. Hopefully this can prevent
the crash and we can recover the config at a later time.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
commit 617c352e92 "Don't create devices if in a user namespace"
introduced check, which meant to skip mknod operation when run
in user namespace, but instread skipped FIFO and socket files
copy.
Signed-off-by: Maxim Ivanov <ivanov.maxim@gmail.com>
This call was added as part of commit a042e5a20 and at the time was
useful. sandbox.DisableService() basically calls
endpoint.deleteServiceInfoFromCluster() for every endpoint in the
sandbox. However, with the libnetwork change, endpoint.sbLeave()
invokes endpoint.deleteServiceInfoFromCluster(). The releaseNetwork()
call invokes sandbox.Delete() immediately after
sandbox.DisableService(). The sandbox.Delete() in turn ultimately
invokes endpoint.sbLeave() for every endpoint in the sandbox which thus
removes the endpoint's load balancing entry via
endpoint.deleteServiceInfoFromCluster(). So the call to
sandbox.DisableService() is now redundant.
It is noteworthy that, while redundant, the presence of the call would
not cause errors. It would just be sub-optimal. The DisableService()
call would cause libnetwork to down-weight the load balancing entries
while the call to sandbox.Delete() would cause it to remove the entries
immediately afterwards. Aside from the wasted computation, the extra
call would also propagate an extra state change in the networkDB gossip
messages. So, overall, it is much better to just avoid the extra
overhead.
Signed-off-by: Chris Telfer <ctelfer@docker.com>
As soon as the initial executable in the container is executed as a non root user,
permitted and effective capabilities are dropped. Drop them earlier than this, so
that they are dropped before executing the file. The main effect of this is that
if `CAP_DAC_OVERRIDE` is set (the default) the user will not be able to execute
files they do not have permission to execute, which previously they could.
The old behaviour was somewhat surprising and the new one is definitely correct,
but it is not in any meaningful way exploitable, and I do not think it is
necessary to backport this fix. It is unlikely to have any negative effects as
almost all executables have world execute permission anyway.
Use the bounding set not the effective set as the canonical set of capabilities, as
effective will now vary.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Commit fd0e24b718 changed
the stats collection loop to use a `sleep()` instead
of `time.Tick()` in the for-loop.
This change caused a regression in situations where
no stats are being collected, or an error is hit
in the loop (in which case the loop would `continue`,
and the `sleep()` is not hit).
This patch puts the sleep at the start of the loop
to guarantee it's always hit.
This will delay the sampling, which is similar to the
behavior before fd0e24b718.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This PR adds support for compressibility of log file.
I added a new option conpression for the jsonfile log driver,
this option allows the user to specify compression algorithm to
compress the log files. By default, the log files will be
not compressed. At present, only support 'gzip'.
Signed-off-by: Yanqiang Miao <miao.yanqiang@zte.com.cn>
'docker logs' can read from compressed files
Signed-off-by: Yanqiang Miao <miao.yanqiang@zte.com.cn>
Add Metadata to the gzip header, optmize 'readlog'
Signed-off-by: Yanqiang Miao <miao.yanqiang@zte.com.cn>
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>
In case ContainerExport() is called for an unmounted container, it leads
to a daemon panic as container.BaseFS, which is dereferenced here, is
nil.
To fix, do not rely on container.BaseFS; use the one returned from
rwlayer.Mount().
Fixes: 7a7357dae1 ("LCOW: Implemented support for docker cp + build")
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
In info, we only need the number of images, but `CountImages` was
getting the whole map of images and then grabbing the length from that.
This causes a lot of unnecessary CPU usage and memory allocations, which
increases with O(n) on the number of images.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Ingress networks will no longer automatically remove their
load-balancing endpoint (and sandbox) automatically when the network is
otherwise upopulated. This is to prevent automatic removal of the
ingress networks when all the containers leave them. Therefore
explicit removal of an ingress network also requires explicit removal
of its load-balancing endpoint.
Signed-off-by: Chris Telfer <ctelfer@docker.com>
