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As the title says. 如标题所示。 I need to be able to retrieve the IP address the docker hosts and the portmaps from the host to the container, and doing that inside of the container. 我需要能够检索Docker主机的IP地址和从主机到容器的端口映射,并在容器内部进行操作。
参考:
唯一的方法是在创建容器时将主机信息作为环境传递
run --env=
/sbin/ip route|awk '/default/ { print $3 }'
正如@MichaelNeale所注意的那样,没有必要在Dockerfile
使用此方法(除非仅在构建期间需要此IP),因为此IP将在构建期间进行硬编码。
The --add-host
could be a more cleaner solution (but without the port part, only the host can be handled with this solution). --add-host
可能是一个更简洁的解决方案(但如果没有端口部分,则只能使用此解决方案来处理主机)。 So, in your command, do something like: 因此,在您的命令中,执行以下操作:
docker run --add-host dockerhost:`/sbin/ip route|awk '/default/ { print $3}'` [my container]
(From ) (来自 )
If you enabled the (via tcp://0.0.0.0:4243
for instance) and know the host machine's hostname or IP address this can be done with a lot of bash. 如果启用了tcp://0.0.0.0:4243
(例如,通过 tcp://0.0.0.0:4243
)并且知道主机的主机名或IP地址,则可以通过大量的bash来完成。
Within my container's user's bashrc
: 在我容器的用户的bashrc
:
export hostIP=$(ip r | awk '/default/{print $3}')export containerID=$(awk -F/ '/docker/{print $NF;exit;}' /proc/self/cgroup)export proxyPort=$( curl -s http://$hostIP:4243/containers/$containerID/json | node -pe 'JSON.parse(require("fs").readFileSync("/dev/stdin").toString()).NetworkSettings.Ports["DESIRED_PORT/tcp"][0].HostPort')
The second line grabs the container ID from your local /proc/self/cgroup
file. 第二行从本地/proc/self/cgroup
文件中获取容器ID。
Third line curls out to the host machine (assuming you're using 4243 as docker's port) then uses node to parse the returned JSON for the DESIRED_PORT
. 第三行缩小到主机(假设您使用4243作为docker的端口),然后使用node解析DESIRED_PORT
返回的JSON。
For those running Docker in AWS, the for the host is still available from inside the container. 对于在AWS中运行Docker的用户,仍可以从容器内部获得主机的 。
curl http://169.254.169.254/latest/meta-data/local-ipv4
For example: 例如:
$ docker run alpine /bin/sh -c "apk update ; apk add curl ; curl -s http://169.254.169.254/latest/meta-data/local-ipv4 ; echo"fetch http://dl-cdn.alpinelinux.org/alpine/v3.3/main/x86_64/APKINDEX.tar.gzfetch http://dl-cdn.alpinelinux.org/alpine/v3.3/community/x86_64/APKINDEX.tar.gzv3.3.1-119-gb247c0a [http://dl-cdn.alpinelinux.org/alpine/v3.3/main]v3.3.1-59-g48b0368 [http://dl-cdn.alpinelinux.org/alpine/v3.3/community]OK: 5855 distinct packages available(1/4) Installing openssl (1.0.2g-r0)(2/4) Installing ca-certificates (20160104-r2)(3/4) Installing libssh2 (1.6.0-r1)(4/4) Installing curl (7.47.0-r0)Executing busybox-1.24.1-r7.triggerExecuting ca-certificates-20160104-r2.triggerOK: 7 MiB in 15 packages172.31.27.238$ ifconfig eth0 | grep -oP 'inet addr:\K\S+'172.31.27.238
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