How can I make /etc/hosts writable by root in a Docker Container?

Question

I\'m new to using docker and am configuring a container.
I am unable to edit /etc/hosts (but need to for some software I\'m developing). Auto-edit (via sudo or root) of the

Answer 1

UPDATE 2014-09

See @Thomas answer:

/etc/hosts is now writable as of Docker 1.2.

Original answer

You can use this hack in the meanwhile

https://unix.stackexchange.com/questions/57459/how-can-i-override-the-etc-hosts-file-at-user-level

In your Dockerfile:

ADD your_hosts_file /tmp/hosts
RUN mkdir -p -- /lib-override && cp /lib/x86_64-linux-gnu/libnss_files.so.2 /lib-override
RUN perl -pi -e 's:/etc/hosts:/tmp/hosts:g' /lib-override/libnss_files.so.2
ENV LD_LIBRARY_PATH /lib-override