I'm getting started with AWS ECS and, as a proof of concept, I'm trying to run a simple Apache webserver. The problem is that the task fails, shutting down with the message:
Essential container in task exited
The container in my task pulls a Docker Hub image I built myself from this dockerfile:
FROM ubuntu:16.04
RUN apt update
RUN apt install -y apache2
RUN echo "Welcome to my web site" > /var/www/html/index.html
EXPOSE 80
I know that the pull was successful, that the image can do what it's supposed to do, and my networking is all good because, when I run this from the command line on the underlying EC2 instance:
docker run -d -p 80:80 reponame/webserver /usr/sbin/apache2ctl -D FOREGROUND
...it gives me a working web page. I gave the container a hard limit of 512 MB and port mappings from 80 to 80. It's tagged "essential" and I've tried using all kinds of values for Entry point, including:
/usr/sbin/apache2ctl -D FOREGROUND
Any ideas? Thanks,