Docker，如何从容器内获取容器信息？ [英] Docker, how to get container information from within the container?

问题描述

我想让我的 docker容器知道他们的配置，你可以通过元数据获得有关EC2实例的信息。

I would like to make my docker containers aware of their configuration, the same way you can get information about EC2 instances through metadata.

我可以使用（提供 docker 正在侦听端口 4243 ）

I can use (provided docker is listening on port 4243)

curl http://172.17.42.1:4243/containers/$HOSTNAME/json

获取一些数据，但想知道是否有更好的方法至少获得容器的完整ID，因为 HOSTNAME 实际上缩短为12个字符，docker似乎执行最佳匹配。

to get some of its data, but would like to know if there is a better way at least the get the full ID of the container, because HOSTNAME is actually shortened to 12 characters and docker seems to perform a "best match" on it.

另外，如何获取Docker主机的外部IP（不包括访问AWS特有的EC2元数据）

Also, how can I get the external IP of the docker host (other than accessing the EC2 metadata, which is specific to AWS)

推荐答案

我发现可以在/ proc / self / cgroup

I've found out that the container id can be found in /proc/self/cgroup

中找到容器ID，所以你可以得到id：

So you can get the id with :

cat /proc/self/cgroup | grep -o  -e "docker-.*.scope" | head -n 1 | sed "s/docker-\(.*\).scope/\\1/"

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