It will Tar up contents of child directory onto tmpfs if mounted over
This patch will use the new PreMount and PostMount hooks to "tar"
up the contents of the base image on top of tmpfs mount points.
Signed-off-by: Dan Walsh <dwalsh@redhat.com>
Closes#9798
@maintainers please note that this is a change to the UX. We no longer
require the -f flag on `docker tag` to move a tag from an existing image.
However, this does make us more consistent across our commands,
see https://github.com/docker/docker/issues/9798 for the history.
Signed-off-by: Doug Davis <dug@us.ibm.com>
libcontainer v0.0.4 introduces setting `/proc/self/oom_score_adj` to
better tune oom killing preferences for container process. This patch
simply integrates OomScoreAdj libcontainer's config option and adjust
the cli with this new option.
Signed-off-by: Antonio Murdaca <amurdaca@redhat.com>
Signed-off-by: Antonio Murdaca <runcom@redhat.com>
Docker daemon uses kv-store as the host-discovery backend.
Discovery module tracks the liveness of a node through a simple
keepalive mechanism. The keepalive mechanism depends on every
node performing heartbeat by registering itself with the discovery
module (via KV-Store Put operation). And for every Put operation,
the discovery module in all other nodes will receive a Watch
notification. That keeps the node alive.
Any node that fails to register itself within the TTL timer is
considered dead and removed from the discovery database.
The default timer (heartbeat = 20 seconds & ttl = 60 seconds)
works fine for small clusters. But for large clusters, these
default timers are extremely aggressive and that causes high CPU
& most of the processing is spent managing the node discovery
and that impacts normal daemon operation.
Hence we need a way to make the discovery ttl and heartbeat
configurable. As the cluster size grows, the user can change
these timers to make sure the daemon scales.
Signed-off-by: Madhu Venugopal <madhu@docker.com>
Plugin drivers were added to docker info in
https://github.com/docker/docker/pull/17300
but not added to the example output in the online
docs.
Also fixed mixed tabs/spaces in the API documentation.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit enhance `docker network rm` command to allow user to delete
multi networks at the same time.
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
Fixes#16555
Original docker `cp` always copy symbol link itself instead of target,
now we provide '-L' option to allow docker to follow symbol link to real
target.
Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
* This commit will mark --before and --since as deprecated, but leave their behavior
unchanged until they are removed, then re-implement them as options for --filter.
* And update the related docs.
* Update the integration tests.
Fixes issue #17716
Signed-off-by: Wen Cheng Ma <wenchma@cn.ibm.com>
- Optional "--shm-size=" was added to the sub-command(run, create,and build).
- The size of /dev/shm in the container can be changed
when container is made.
- Being able to specify is a numerical value that applies number,
b, k, m, and g.
- The default value is 64MB, when this option is not set.
- It deals with both native and lxc drivers.
Signed-off-by: NIWA Hideyuki <niwa.hiedyuki@jp.fujitsu.com>
Our implementation of systemd cgroups is mixture of systemd api and
plain filesystem api. It's hard to keep it up to date with systemd and
it already contains some nasty bugs with new versions. Ideally it should
be replaced with some daemon flag which will allow to set parent systemd
slice.
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
devmapper uses xfs by default now. So include xfsprogs in build
environment. Also update docs to reflect the new default.
Signed-off-by: Anusha Ragunathan <anusha@docker.com>
