Docker commands that I run almost every time I am qaing something new

the-dockerfile-that-i-use.md

#duh! Pick the base image (this is latest as of May 2020)
FROM php:7.4.5-apache

# Install composer
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

#duh!
RUN apt-get update

#Install zip+icu dev libs
RUN apt-get install libzip-dev zip libicu-dev -y

#Install PHP extensions zip and intl (intl requires to be configured)
RUN docker-php-ext-install zip && docker-php-ext-configure intl && docker-php-ext-install intl

#Required for htaccess rewrite rules
RUN a2enmod rewrite

Build the docker image the above Dockerfile using docker build -t "cakephp:1" .

Give any tag - the text in double quotes in the command above - I would give it something like this for local development, and if I need to push it to docker-hub, then I will usually prefix with my docker-hub username "jdecode".

docker build -t "jdecode/cakephp:0.1" .

This looks more like it ;)

Optionally, I would push to docker-hub if I feel like using docker push jdecode/cakephp:0.1 (or whatever name/tag I would be using)

Once built, run the docker image using the tag that have given e.g. cakephp:0.1 in the previous comment.

docker run cakephp:0.1

You can check if the docker image is running by running
docker ps

You should see something like the screenshot (I used the tag "jdecode/cakephp:0.2")

The name at the end is generated automatically (if you don't send it as a parameter - I don't remember the flag for that now, and too lazy to Google it).

You can use this name to SSH using the following command (the container name is beautiful_jang from the screenshot)

docker exec -it beautiful_jang /bin/bash

You can also use the container ID (from docker ps) e.g.

docker exec -it 5c72b52eb593 /bin/bash

Interestingly, I tried it for Laravel, and it worked pretty much in a similar way:

#duh! Pick the base image (this is latest as of May 2020)
FROM php:7.4.5-apache

# Install composer
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

#duh!
RUN apt-get update

#Install zip+icu dev libs
RUN apt-get install libzip-dev zip libicu-dev -y

#Install PHP extensions zip and intl (intl requires to be configured)
#RUN docker-php-ext-install zip && docker-php-ext-configure intl && docker-php-ext-install intl

WORKDIR /var/www/html

RUN composer create-project --prefer-dist laravel/laravel .

Eventually, after some playing around, I now have 2 set of Dockerfile and docker-compose.yml - CakePHP and Laravel, both have MySQL, Postgres and Redis (php-redis extension is not installed yet).

Depending on the need, make changes in the docker-compose.yml file's DATABASE_URL value.

CakePHP

Dockerfile content:

FROM jdecode/cake406-mysql8:0.2

(yes, that is it)

---

docker-compose.yml (this is a long file, yes)

version: "3"
services:
  cake:
    build:
      context: .
      dockerfile: Dockerfile
    image: cakephp:0.x
    ports:
      - 8080:80
    links:
      - mysql
      - pgsql
      - redis
    depends_on:
      - mysql
      - pgsql
      - redis
    environment:
      DATABASE_URL: mysql://root:mysqldocker@172.43.1.2/cake
      #DATABASE_URL: postgres://postgres:pgsqldocker@172.43.1.3/cake
      DEBUG: 'true'
      SECURITY_SALT: 49e558df8e733a6daedbe054a9ccd7add9d9a6efa8a96cf3248815c364b47391
    networks:
      cake_net:
        ipv4_address: 172.43.1.1

  mysql:
    image: mysql:latest
    ports:
    - 3306:33060
    volumes:
      - mysql_data:/var/lib/mysql
    restart: always
    container_name: cake-mysql
    command: --default-authentication-plugin=mysql_native_password
    environment:
        MYSQL_ROOT_PASSWORD: mysqldocker
        MYSQL_DATABASE: cake
    networks:
      cake_net:
        ipv4_address: 172.43.1.2
          
  pgsql:
    image: postgres:latest
    ports:
    - 5432:54320
    volumes:
      - pgsql_data:/var/lib/postgres
    container_name: cake-pgsql
    environment:
      POSTGRES_PASSWORD: pgsqldocker
      POSTGRES_DB: cake
    networks:
      cake_net:
        ipv4_address: 172.43.1.3
  redis:
    image: redis:latest
    restart: always
    container_name: cake-redis
    ports:
      - 6379:63790
    networks:
      cake_net:
        ipv4_address: 172.43.1.4
volumes:
  mysql_data: {}
  pgsql_data: {}
  redis_data: {}
networks:
  cake_net:
    ipam:
      driver: default
      config:
        - subnet: 172.43.0.0/16

Laravel

Dockerfile content

FROM jdecode/laravelphp:0.3

(Yes, I got lazy with naming, or rather this is neat)

---

docker-compose.yml content

version: "3"
services:
  laravel:
    build:
      context: .
      dockerfile: Dockerfile
    image: laravelphp:0.x
    ports:
      - 8080:80
    links:
      - mysql
      - redis
    depends_on:
      - mysql
      - redis
    environment:
      #DATABASE_URL: mysql://root:mysqldocker@172.53.1.2/laravel
      DATABASE_URL: postgres://postgres:docker@172.53.1.3/laravel
    networks:
      laravel_net:
        ipv4_address: 172.53.1.1

  mysql:
    image: mysql:latest
    #image: mysql:5.7.24
    ports:
    - 3306:33060
    volumes:
      - mysql_data:/var/lib/mysql
    restart: always
    container_name: laravel-mysql
    command: --default-authentication-plugin=mysql_native_password
    environment:
        MYSQL_ROOT_PASSWORD: mysqldocker
        MYSQL_DATABASE: laravel
    networks:
      laravel_net:
        ipv4_address: 172.53.1.2
          
  pgsql:
    image: postgres:latest
    ports:
    - 5432:54320
    volumes:
      - pgsql_data:/var/lib/postgres
    container_name: laravel-pgsql
    environment:
      POSTGRES_PASSWORD: pgsqldocker
      POSTGRES_DB: laravel
    networks:
      laravel_net:
        ipv4_address: 172.53.1.3
  redis:
    image: redis:latest
    restart: always
    container_name: laravel-redis
    ports:
      - 6379:63790
    networks:
      laravel_net:
        ipv4_address: 172.53.1.4
volumes:
  mysql_data: {}
  pgsql_data: {}
  redis_data: {}
networks:
  laravel_net:
    ipam:
      driver: default
      config:
        - subnet: 172.53.0.0/16

Instructions to use above Dockerfile and docker-compose.yml files.

Place these in a folder, and go to Ubuntu 19.10 CLI (not tested anywhere else, yet) and enter:
docker-compose up --build

For CakePHP, go to 172.43.1.1
For Laravel, go to 172.53.1.1

Switched to Ubuntu 20.04 and docker login was failing.

Google/GitHub gave the solution - sudo apt install golang-docker-credential-helpers

docker-compose run kode bin/cake migrations migrate
docker-compose run kode bin/cake migrations seed