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

I have recently stumbled upon a need to add an entry into /etc/hosts file as well (in order to make sendmail working).

I ended up making it part of the Dockerfile's CMD declaration like this:

CMD echo "127.0.0.1 noreply.example.com $(hostname)" >> /etc/hosts \
    && sendmailconfig \
    && cron -f

So it effectively is not a part of the image, but it is always available after creating a container from the image.