Commit Graph

12 Commits

Author SHA1 Message Date
Erik St. Martin 42ef78911e Implementing support for --cpu-rt-period and --cpu-rt-runtime so that
containers may specify these cgroup values at runtime. This will allow
processes to change their priority to real-time within the container
when CONFIG_RT_GROUP_SCHED is enabled in the kernel. See #22380.

Also added sanity checks for the new --cpu-rt-runtime and --cpu-rt-period
flags to ensure that that the kernel supports these features and that
runtime is not greater than period.

Daemon will support a --cpu-rt-runtime flag to initialize the parent
cgroup on startup, this prevents the administrator from alotting runtime
to docker after each restart.

There are additional checks that could be added but maybe too far? Check
parent cgroups to ensure values are <= parent, inspecting rtprio ulimit
and issuing a warning.

Signed-off-by: Erik St. Martin <alakriti@gmail.com>
2017-06-02 00:10:28 +00:00
Misty Stanley-Jones 7f36c3a1a0 Sync docker/docker refs with files mistakenly edited in docker.github.io repo
Signed-off-by: Misty Stanley-Jones <misty@docker.com>
2017-06-02 00:10:26 +00:00
Misty Stanley-Jones 2845676cc2 Convert Markdown frontmatter to YAML
Some frontmatter such as the weights, menu stuff, etc is no longer used
'draft=true' becomes 'published: false'

Signed-off-by: Misty Stanley-Jones <misty@docker.com>
2017-06-02 00:10:24 +00:00
yuexiao-wang 20463c7b18 fix typo for docs reference
Signed-off-by: yuexiao-wang <wang.yuexiao@zte.com.cn>
2017-06-02 00:10:10 +00:00
Zhang Wei f63d53c736 Forbid update restart policy of container with AutoRemove flag
"--restart" and "--rm" are conflict options, if a container is started
with AutoRemove flag, we should forbid the update action for its Restart
Policy.

Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
2017-06-02 00:10:05 +00:00
Qiang Huang 69eb98ada5 Fix kernel memory updating docs
Specify that kernel memory updating limitation only applies
on kernel version older than 4.6.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
2017-06-02 00:10:03 +00:00
Sebastiaan van Stijn e2a6cf9fd5 docs: cleanup docker update docs
move the "kernel memory" examples to the "examples" section,
and fix some formatting and grammar.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2017-06-02 00:10:03 +00:00
Qiang Huang 670a0b8077 Soften limitation of update kernel memory
Kernel memory is not allowed to be updated if container is
running, it's not actually a precise kernel limitation.

Before kernel version 4.6, kernel memory will not be accounted
until kernel memory limit is set, if a container created with
kernel memory initialized, kernel memory is accounted as soon
as process created in container, so kernel memory limit update
is allowed afterward. If kernel memory is not initialized,
kernel memory consumed by processes in container will not be
accounted, so we can't update the limit because the account
will be wrong.

So update kernel memory of a running container with kernel memory
initialized is allowed, we should soften the limitation by docker.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
2017-06-02 00:07:49 +00:00
Vincent Demeester 3ebe3fe752 Updates on cli reference documentation
- Update ps with `--last` flag
- Update commands with current output
- Make sure hugo does not detect the wrong language
- Update usage for `tag` command to be more coherent with the other ones

Signed-off-by: Vincent Demeester <vincent@sbr.pm>
2017-06-02 00:07:49 +00:00
Zhang Wei 623082a1eb Update RestartPolicy of container
Add `--restart` flag for `update` command, so we can change restart
policy for a container no matter it's running or stopped.

Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
2017-06-02 00:07:29 +00:00
Qiang Huang dd7ea45fae Fix comment about swap limit of docker update
The description "set `-1` to disable swap" is wrong, `build`,
`create` and `run` already fixed, we need to fix `update` as well.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
2017-06-02 00:07:25 +00:00
Qiang Huang 3f44418168 Implemet docker update command
It's used for updating properties of one or more containers, we only
support resource configs for now. It can be extended in the future.

Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
2017-06-02 00:07:21 +00:00