Quote from moshe on 24/10/2020, 9:18 am

Problem

User wants to user create sidecar style storage

• Benefits to make the docker as portable as possible

Create your first container
Create a file Dockerfile.storage with the following contents

FROM ubuntu:latest

RUN apt update && apt install openssh-server sudo -y
RUN useradd -rm -d /home/ubuntu -s /bin/bash -g root -G sudo -u 1000 test
RUN echo ‘test:test’ | chpasswd
RUN service ssh start
RUN mkdir -p /var/storage

EXPOSE 22
CMD [“/usr/sbin/sshd”,”-D”]

Build first container

sudo docker build -t storage -f Dockerfile.storage .

Run your container

sudo docker run -d -p 2222:22 storage -v /var/storage

Note

Parameter “-v /var/storage” expose this out as volume for another container

 

 Create Second Container with NGINX 
## Create a file Dockerfile.nginx with the following contents

FROM ubuntu:latest

## Install nginx
RUN \
add-apt-repository -y ppa:nginx/stable && \
apt-get update && \
apt-get install -y nginx && \
rm -rf /var/lib/apt/lists/* && \
echo “\ndaemon off;” >> /etc/nginx/nginx.conf && \
chown -R www-data:www-data /var/lib/nginx

# Define mount directories.
VOLUME [“/etc/nginx/sites-enabled”, “/etc/nginx/certs”, “/etc/nginx/conf.d”, “/var/log/nginx”, “/var/www/html”]

# Define working directory.
WORKDIR /etc/nginx

# Define default command.
CMD [“nginx”]

# Expose ports.
EXPOSE 80
EXPOSE 443

Build Docker nginx container
sudo docker build -t nginx -f Dockerfile.nginx .

 

Run your container

sudo docker run -d –volumes-from storage —env TAGS=“nginx” nginx

Note
“–volumes-from app_x” option mount data volumes from container “storage” and binds it into “nginx” container.
Files generated by “storage” in these directories will also be accessible to “nginx” container.