847690583f
Because we are launching alot of different runc commands to do operations there is a race between doing a `cmd.Wait()` and getting the sigchld and reaping it. We can remove the sigchild reaper from containerd as long as we make sure we reap the shim process if we are the parent, i.e. not restored. Signed-off-by: Michael Crosby <crosbymichael@gmail.com> |
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|---|---|---|
| api | ||
| archutils | ||
| containerd | ||
| containerd-shim | ||
| ctr | ||
| docs | ||
| hack | ||
| integration-test | ||
| osutils | ||
| runtime | ||
| specs | ||
| supervisor | ||
| vendor/src | ||
| .gitignore | ||
| CONTRIBUTING.md | ||
| Dockerfile | ||
| LICENSE.code | ||
| LICENSE.docs | ||
| MAINTAINERS | ||
| Makefile | ||
| NOTICE | ||
| README.md | ||
| version.go | ||
containerd
containerd is a daemon to control runC, built for performance and density. containerd leverages runC's advanced features such as seccomp and user namespace support as well as checkpoint and restore for cloning and live migration of containers.
Getting started
The easiest way to start using containerd is to download binaries from the releases page.
The included ctr command-line tool allows you interact with the containerd daemon:
$ sudo ctr containers start redis /containers/redis
$ sudo ctr containers list
ID PATH STATUS PROCESSES
redis /containers/redis running 14063
/containers/redis is the path to an OCI bundle. See the docs for more information.
Docs
- Client CLI reference (
ctr) - Daemon CLI reference (
containerd) - Creating OCI bundles
- containerd changes to the bundle
- Attaching to STDIO or TTY
- Telemetry and metrics
All documentation is contained in the /docs directory in this repository.
Building
You will need to make sure that you have Go installed on your system and the containerd repository is cloned
in your $GOPATH. You will also need to make sure that you have all the dependencies cloned as well.
Currently, contributing to containerd is not for the first time devs as many dependencies are not vendored and
work is being completed at a high rate.
After that just run make and the binaries for the daemon and client will be localed in the bin/ directory.
Performance
Starting 1000 containers concurrently runs at 126-140 containers per second.
Overall start times:
[containerd] 2015/12/04 15:00:54 count: 1000
[containerd] 2015/12/04 14:59:54 min: 23ms
[containerd] 2015/12/04 14:59:54 max: 355ms
[containerd] 2015/12/04 14:59:54 mean: 78ms
[containerd] 2015/12/04 14:59:54 stddev: 34ms
[containerd] 2015/12/04 14:59:54 median: 73ms
[containerd] 2015/12/04 14:59:54 75%: 91ms
[containerd] 2015/12/04 14:59:54 95%: 123ms
[containerd] 2015/12/04 14:59:54 99%: 287ms
[containerd] 2015/12/04 14:59:54 99.9%: 355ms
Roadmap
The current roadmap and milestones for alpha and beta completion are in the github issues on this repository. Please refer to these issues for what is being worked on and completed for the various stages of development.
Copyright and license
Copyright © 2016 Docker, Inc. All rights reserved, except as follows. Code is released under the Apache 2.0 license. The README.md file, and files in the "docs" folder are licensed under the Creative Commons Attribution 4.0 International License under the terms and conditions set forth in the file "LICENSE.docs". You may obtain a duplicate copy of the same license, titled CC-BY-SA-4.0, at http://creativecommons.org/licenses/by/4.0/.