如何检查进程是否在docker容器内运行 [英] How to check if a process is running inside docker container
问题描述
[Updated1]我有一个shell会改变一些功能中的TCP内核参数,但现在我需要使这个shell在Docker容器中运行,这意味着shell需要知道它正在一个容器内运行并停止配置内核。
现在我不知道如何实现,这里是 / proc / self / cgroup
在容器内:
9:hugetlb:/
8:perf_event:/
7:blkio: /
6:冰柜:/
5:设备:/
4:内存:/
3:cpuacct:/
2:cpu:/ docker / 25ef774c390558ad8c4e9a8590b6a1956231aae404d6a7aba4dde320ff569b8b
1:cpuset:/
上面的任何标志可以用来弄清楚这个过程是运行在容器内?
[已更新2]:我也注意到了确定一个进程是否在lxc / Docker中运行,但在这种情况下似乎不起作用, / proc / 1 / cgroup中的内容我的容器的
是:
8:perf_event:/
7:blkio:/
6:冰柜:/
5:设备:/
4:内存:/
3:cpuacct:/
2:cpu:/ docker / 25ef774c390558ad8c4e9a8590b6a1956231aae404d6a7aba4 dde320ff569b8b
1:cpuset:/
No / lxc / containerid
如果您在Docker容器内,检查Docker容器是否可以通过 / proc / 1 / cgroup
。由于此帖建议您可以执行以下操作:
在docker容器之外, / proc / 1 / cgroup
中的所有条目都以 /
如下所示:
vagrant @ ubuntu-13:〜$ cat / proc / 1 / cgroup
11:name = systemd:/
10:hugetlb:/
9:perf_event:/
8:blkio:/
7:freezer:/
6:设备:/
5:内存:/
4:cpuacct:/
3:cpu:/
2:cpuset:/
在Docker容器内部,一些控制组将属于Docker(或LXC):
$ b $ ubuntu-13:〜$ docker运行busybox cat / proc / 1 / cgroup
11:name = systemd:/
10:hugetlb: /
9:perf_event:/
8:blkio:/
7:freezer:/
6:devices:/ docker / 3601745b3bd54d9780436faa5f0e4f72bb46231663bb99a6bb892764917832c2
5:memory:/
4:cpuacct:/
3:cpu:/ docker / 3601745b3bd54d9780436faa5f0e4f72bb462 31663bb99a6bb892764917832c2
2:cpuset:/
[Updated1] I have a shell which will change TCP kernel parameters in some functions, but now I need to make this shell run in Docker container, that means, the shell need to know it is running inside a container and stop configuring the kernel.
Now I'm not sure how to achieve that, here is the contents of /proc/self/cgroup
inside the container:
9:hugetlb:/
8:perf_event:/
7:blkio:/
6:freezer:/
5:devices:/
4:memory:/
3:cpuacct:/
2:cpu:/docker/25ef774c390558ad8c4e9a8590b6a1956231aae404d6a7aba4dde320ff569b8b
1:cpuset:/
Any flags above can I use to figure out if this process is running inside a container?
[Updated2]: I have also noticed Determining if a process runs inside lxc/Docker, but it seems not working in this case, the content in /proc/1/cgroup
of my container is:
8:perf_event:/
7:blkio:/
6:freezer:/
5:devices:/
4:memory:/
3:cpuacct:/
2:cpu:/docker/25ef774c390558ad8c4e9a8590b6a1956231aae404d6a7aba4dde320ff569b8b
1:cpuset:/
No /lxc/containerid
To check inside a Docker container if you are inside a Docker container or not can be done via /proc/1/cgroup
. As this post suggests you can to the following:
Outside a docker container all entries in /proc/1/cgroup
end on /
as you can see here:
vagrant@ubuntu-13:~$ cat /proc/1/cgroup
11:name=systemd:/
10:hugetlb:/
9:perf_event:/
8:blkio:/
7:freezer:/
6:devices:/
5:memory:/
4:cpuacct:/
3:cpu:/
2:cpuset:/
Inside a Docker container some of the control groups will belong to Docker (or LXC):
vagrant@ubuntu-13:~$ docker run busybox cat /proc/1/cgroup
11:name=systemd:/
10:hugetlb:/
9:perf_event:/
8:blkio:/
7:freezer:/
6:devices:/docker/3601745b3bd54d9780436faa5f0e4f72bb46231663bb99a6bb892764917832c2
5:memory:/
4:cpuacct:/
3:cpu:/docker/3601745b3bd54d9780436faa5f0e4f72bb46231663bb99a6bb892764917832c2
2:cpuset:/
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