Automated build with docker-compose (Application+mySQL server)

Question

I have some problems while building an automated build for my web application, using mySQL. I will use the example from https://github.com/ehazlett/docker-sample-java-mysql-tomcat. This is my fig.yml file:

db:
  image: orchardup/mysql
  environment:
    MYSQL_USER: java
    MYSQL_PASSWORD: java
    MYSQL_DATABASE: javatest
  ports:
    - "3306"

dbinit:
  image: orchardup/mysql
  entrypoint: /bin/bash
  volumes:
    - .:/host
  command: -c "sleep 4; mysql -u java --password=java -h mysql javatest < /host/init.sql; exit 0"
  links:
    - db:mysql

app:
  build: .
  links:
    - dbinit
    - db:mysql
  ports:
    - "8080"

And this the simple Dockerfile:

FROM ehazlett/tomcat7

COPY dbtest /opt/tomcat/webapps/dbtest

Now, in order to manually run it I should run these commands:

docker run -d -P -e MYSQL_USER=java -e MYSQL_PASSWORD=java -e MYSQL_DATABASE=javatest --name mysql orchardup/mysql

docker run -ti --rm --link mysql:mysql -v $(pwd):/host --entrypoint /bin/bash orchardup/mysql -c "sleep 4; mysql -u java --password=java -h mysql javatest < /host/init.sql; exit 0"

docker build -t javatest .

docker run -ti -P --rm --link mysql:mysql javatest

I would like the the applciation would run just by typing:

docker-compose up

Is there any way to do that? Thank you for your help.

VladoDemcak · Accepted Answer · 2016-10-16 17:45:11Z

For ordering of running your docker containers you need to set depends_on.

For your case:

version: '2'
services:
  db:
    image: orchardup/mysql
    environment:
      MYSQL_USER: java
      MYSQL_PASSWORD: java
      MYSQL_DATABASE: javatest
    ports:
    - "3306"
  dbinit:
    image: orchardup/mysql
    depends_on:
      - db
    entrypoint: /bin/bash
    volumes:
      - .:/host
    command: -c "sleep 4; mysql -u java --password=java -h mysql javatest < /host/init.sql; exit 0"
    links:
    - db:mysql
  javatest:
    build: .
    image: javatest
    depends_on:
    - dbinit
    links:
    - dbinit
    - db:mysql
    ports:
    - "8080"

and run docker compose up with specific build for javatest and run it in detached mode with -d (optional):

docker-compose up --build -d javatest

just keep in mind containers will not wait for startup of db just for "start container".

In this case you need to modify entrypoint and create additional script that will wait for connection - checking opened ports for example. - check wait-for docker suggestion

AFTER EDIT:

I have added full sample how you docker-compose should looks like. I added version and services with correct formatting for yaml files.

So back to what you want to do:

(1) docker run -d -P -e MYSQL_USER=java -e MYSQL_PASSWORD=java -e MYSQL_DATABASE=javatest --name mysql orchardup/mysql  
(2) docker run -ti --rm --link mysql:mysql -v $(pwd):/host --entrypoint /bin/bash orchardup/mysql -c "sleep 4; mysql -u java --password=java -h mysql javatest < /host/init.sql; exit 0"
(3) docker build -t javatest .
(4) docker run -ti -P --rm --link mysql:mysql javatest

Explanation:

In the docker-compose, db is doing step (1), dbinit is doing step (2) and is depended on db and service javatest is doing steps (3) and (4) because you build javatest image and run it with links like in step (4) and also service javatest is depended on dbinit so it will wait until startup of container (with image orchardup/mysql).

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