How can we add capabilities to a running docker container?

Question

Is it possible to add a capability (for ex: NET_ADMIN) after the container has actually started?

I started a container few days ago and a service provided by it is b

Answer 1

VanagaS

1.Stop Container:

docker stop yourcontainer;

2.Get container id:

docker inspect yourcontainer;

3.Modify hostconfig.json(default docker path:/var/lib/docker, you can change yours)

vim /var/lib/docker/containers/containerid/hostconfig.json

4.Search "CapAdd", and modify null to ["NET_ADMIN"];

....,"VolumesFrom":null,"CapAdd":["NET_ADMIN"],"CapDrop":null,....

5.Restart docker in host machine;

service docker restart;

6.Start yourconatiner;

docker start yourcontainer;

it work for me, enjoy it.