CODEWITHSUNDEEP
dockerdockerfiledocker-volume
Larry
Larry

Reputation: 65

Why Dockerfile builds but is not working correctly, even though it works manually?

I've been trying to get this running for many MANY hours. I've been scouting docker docs, github repos and other stuff but I can't get it working for some reason.

My dockerfile:

FROM mattrayner/lamp:latest-1804

WORKDIR /app
RUN  wget -O /tmp/lwt.zip http://downloads.sourceforge.net/project/lwt/lwt_v_1_6_3.zip && \
     yes A | unzip /tmp/lwt.zip &&\
     rm /tmp/lwt.zip &&\
     mv connect_xampp.inc.php connect.inc.php
EXPOSE 80

CMD ["/run.sh"]

It build normally without any errors but when I run the image nothing appears in the /app directory and I get just a basic Welcome to LAMP view on my browser.

Though,

If I do docker run -p "80:80" -it -v ${PWD}/app:/app mattrayner/lamp:latest-1804 /bin/bash, cd /app, copy and paste

wget -O /tmp/lwt.zip http://downloads.sourceforge.net/project/lwt/lwt_v_1_6_3.zip && \
     yes A | unzip /tmp/lwt.zip &&\
     rm /tmp/lwt.zip &&\
     mv connect_xampp.inc.php connect.inc.php

it still doesn't work BUT if I exit and run the same docker run command it works.

Docker LAMP instructions also state to do exactly as I have done:

FROM mattrayner/lamp:latest-1804

# Your custom commands

CMD ["/run.sh"]

As I followed these instructions I thought that everything would work nicely.

What's the catch here? It has something to do with the intermediate containers probably but I can't comprehend it (I'm not a devops or developer by trade, just a hobbyist).

Upvotes: 0

Views: 337

Answers (2)

user29477983
user29477983

Reputation: 1

services:
  webserver:
    container_name: my-docker-website
    build:
      context: .
      dockerfile: dockerfile
    volumes:
      - ./www:/var/www/html
    ports:
      - 8000:80
    depends_on:
      - mysql-db
  mysql-db:
    image: mysql:8.0
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: sqlinjection
      MYSQL_USER: db_user
      MYSQL_PASSWORD: password
    ports:
      - "3366:3306"
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    links:
      - mysql-db
    ports:
      - "8081:80"
    environment:
      PMA_HOST: mysql-db
      MYSQL_ROOT_PASSWORD: password

Upvotes: -2

Alejandro Galera
Alejandro Galera

Reputation: 3691

That happens because you're doing this:

  1. Download a file (wget ...) in your /app dir in your docker image.
  2. After that, you're overwritting this /app dir when you mount volume, with content of your $PWD/app.

If you are installing something doing docker build in some dirs, don't mount into the same path.

If you need something in the same path, you can mount some concrete files, but not the whole dir, or it will override what you had in your docker image when container is created.

You can do wget somewhere else or download it into your ${PWD}/app and then mount it.

Upvotes: 4

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