Memory swappiness option takes 0-100, and helps to tune swappiness
behavior per container.
For example, When a lower value of swappiness is chosen
the container will see minimum major faults. When no value is
specified for memory-swappiness in docker UI, it is inherited from
parent cgroup. (generally 60 unless it is changed).
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
When a container is removed but it had an exec, that still hasn't been
GC'd per PR #14476, and someone tries to inspect the exec we should
return a 404, not a 500+container not running. Returning "..not running" is
not only misleading because it could lead people to think the container is
actually still around, but after 5 minutes the error will change to a 404
after the GC. This means that we're externalizing our internall soft-deletion/GC
logic which shouldn't be any of the end user's concern. They should get the
same results immediate or after 5 minutes.
Signed-off-by: Doug Davis <dug@us.ibm.com>
Carry #11675
Aside from what #11675 says, to me a key usecase for this is to support
more than one Docker cli running at the same time but each may have its
own set of config files.
Signed-off-by: Doug Davis <dug@us.ibm.com>
This is a follow-on to PR #14520.
PR #14520 is the quick fix to get the testing working again.
This PR makes sure that the list of execs associated with a container goes
from zero to one (as a new exec is run), then back to zero when the exec is
finished. However, we should be able to query the exec while the container
is still around, and even though the exec isn't listed in the container's
inspect data.
Signed-off-by: Doug Davis <dug@us.ibm.com>
Libcontainer already supported mount container's own cgroup into
container, with this patch, we can see container's own cgroup info
in container.
Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
It seems http://hub.docker.com is not accessible anymore, so switching
to https://hub.docker.com for testRequires(c, Network).
Adds a Timeout check on the TestRequirement to *panic* if there is a
timeout (fail fast).
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
If a container is read-only, also set /proc, /sys,
& /dev to read-only. This should apply to both privileged and
unprivileged containers.
Note that when /dev is read-only, device files may still be
written to. This change will simply prevent the device paths
from being modified, or performing mknod of new devices within
the /dev path.
Tests are included for all cases. Also adds a test to ensure
that /dev/pts is always mounted read/write, even in the case of a
read-write rootfs. The kernel restricts writes here naturally and
bad things will happen if we mount it ro.
Signed-off-by: Eric Windisch <eric@windisch.us>
- Container networking statistics are no longer
retrievable from libcontainer after the introduction
of libnetwork. This change adds the missing code
for docker daemon to retireve the nw stats from
Endpoint.
Signed-off-by: Alessandro Boch <aboch@docker.com>
