Folder missing inside docker container - docker

Question

I wrote this docker-compose project. The docker-compose.yml looks like this:
version: '3.1'
services:
db:
image: mysql
restart: always
environment:
- MYSQL_DATABASE=mgsv
- MYSQL_USER=mgsv_user
- MYSQL_PASSWORD=mgsvpass
- MYSQL_ROOT_PASSWORD=mysql123
volumes:
- ./mysql:/docker-entrypoint-initdb.d
www:
build: ./mGSV
restart: always
ports:
- 8080:8080
And the Dockerfile is based on a PHP container and looks like this.
FROM php:5-apache
RUN apt-get update && apt-get install -y --no-install-recommends \
openjdk-7-jdk \
maven \
git \
&& rm -rf /var/lib/apt/lists/*
RUN git clone https://github.com/qunfengdong/mGSV.git
# Move the folder 'mgsv' to DocumentRoot of Apache web server. By default, the DocumentRoot of Apache is /var/www/ (speak to the system administrator to know the exact DocumentRoot).
RUN cd /var/www/html/mGSV \
&& mkdir tmp \
&& chmod -R 777 tmp
RUN cd /var/www/html/mGSV && sed -i.bak "s|'gsv'|'mgsv_user'|" lib/settings.php \
&& sed -i.bak "s|$database_pass = ''|$database_pass = 'mgsvpass'|" lib/settings.php \
&& sed -i.bak "s|cas-qshare.cas.unt.edu|localhost|" lib/settings.php
RUN cp /var/www/html/mGSV/Arial.ttf /usr/share/fonts/truetype/
RUN cd /var/www/html/mGSV/ws \
&& tar -xzf mgsv-ws-server.tar.gz
RUN cd /var/www/html/mGSV/ws/mgsv-ws-server \
&& mvn package
RUN cp -f /var/www/html/mGSV/ws/mgsv-ws-server/target/ws-server-1.0RC1-jar-with-dependencies.jar /var/www/html/mGSV/ws/
RUN cd /var/www/html/mGSV/ws \
&& echo "mgsv_upload_url=http://localhost/mgsv" > config.properties \
&& echo "ws_publish_url=http\://localhost\:8081/MGSVService" >> config.properties \
&& java -jar ws-server-1.0RC1-jar-with-dependencies.jar &
This is the output which I got:
Step 1/11 : FROM php:5-apache
---> 8f4a38cf4542
Step 2/11 : RUN apt-get update && apt-get install -y --no-install-recommends openjdk-7-jdk maven git && rm -rf /var/lib/apt/lists/*
---> Using cache
---> f194797b9362
Step 3/11 : RUN git clone https://github.com/qunfengdong/mGSV.git
---> Using cache
---> 4acd066da444
Step 4/11 : RUN cd /var/www/html/mGSV && mkdir tmp && chmod -R 777 tmp
---> Using cache
---> f766f9ceb7d3
Step 5/11 : RUN cd /var/www/html/mGSV && sed -i.bak "s|'gsv'|'mgsv_user'|" lib/settings.php && sed -i.bak "s|$database_pass = ''|$database_pass = 'mgsvpass'|" lib/settings.php && sed -i.bak "s|cas-qshare.cas.unt.edu|localhost|" lib/settings.php
---> Using cache
---> 007dff8907f4
Step 6/11 : RUN cp /var/www/html/mGSV/Arial.ttf /usr/share/fonts/truetype/
---> Using cache
---> 026049ca32d8
Step 7/11 : RUN cd /var/www/html/mGSV/ws && tar -xzf mgsv-ws-server.tar.gz
---> Using cache
---> 92a0f85b27a0
Step 8/11 : RUN cd /var/www/html/mGSV/ws/mgsv-ws-server && mvn package
---> Using cache
---> 5aa1723f255f
Step 9/11 : RUN cp -f /var/www/html/mGSV/ws/mgsv-ws-server/target/ws-server-1.0RC1-jar-with-dependencies.jar /var/www/html/mGSV/ws/
---> Using cache
---> f0dbd0ac1ddb
Step 10/11 : RUN cd /var/www/html/mGSV/ws && echo "mgsv_upload_url=http://localhost/mgsv" > config.properties && echo "ws_publish_url=http\://localhost\:8081/MGSVService" >> config.properties && java -jar ws-server-1.0RC1-jar-with-dependencies.jar &
---> Using cache
---> 0c86c0adddd5
However, when I create an interactive session the /var/www/html/ is empty:
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
php 5-apache 8f4a38cf4542 7 days ago 374MB
$ sudo docker run --entrypoint /bin/bash -i -t 8f4a38cf4542
root#a3908e297bcf:/var/www/html# ls
Why can't I see the /var/www/html/mGSV folder inside the docker container?
Thank you in advance.
Michal

Answer 1

The 8f4a38cf4542 image is the php:5-apache base image you are building FROM before all your additions.
The docker-compose build output should include a line: Successfully built eccdcc9a9534 at the end, which is the image ID you need to copy from your output and use. You should be able to find this image in the complete output:
docker images -a
To make life easier, add an image name to the www service so compose tags the build and it's easily accessable:
www:
build: ./mGSV
image: user3523406/www
restart: always
Then
sudo docker run --entrypoint /bin/bash -it user3523406/www