http: // localhost: How to change the port number

Connect the hello rails screen with your favorite port number

procedure

Try connecting with port number 3000

docker-compose.yml

version: "3"

services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - "3000:3000"
    tty: true
    stdin_open: true
    command: bash -c "bundle exec rails s -p 3000 -b '0.0.0.0'"
    depends_on:
      - db

  db:
    image: mysql:8.0.16
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      MYSQL_HOST: 127.0.0.1
      MYSQL_DATABASE: app_development
      MYSQL_USERNAME: root
      MYSQL_ROOT_PASSWORD: root
    security_opt:
      - seccomp:unconfined
    ports:
      - "3306:3306"

Dockerfile

FROM ruby:2.6.5-stretch
ENV LANG C.UTF-8

ENV APP_ROOT /app
WORKDIR $APP_ROOT

RUN apt-get update && apt-get install -y --no-install-recommends \
    curl apt-transport-https wget && \
    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
    curl -sL https://deb.nodesource.com/setup_8.x | bash - && \
    apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    vim \
    mysql-client \
    yarn \
    nodejs && \
    gem install bundler && \
    rm -rf /var/lib/apt/lists/*


COPY Gemfile $APP_ROOT
COPY Gemfile.lock $APP_ROOT
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
RUN bundle install

COPY . $APP_ROOT

EXPOSE 3000

to start docker-compose up --build Enter the container docker-compose exec app bash Gemfile update bundle install Create a new project (choose mysql instead of sqlite) rails new . -d mysql Drop the container docker-compose down Set docker-compose db container password in database.yml docker-compose up

=> ** rails 3000 port boots **

Connect with port number 3001

docker-compose.yml

version: "3"

services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      - "3001:3001"
    tty: true
    stdin_open: true
    command: bash -c "bundle exec rails s -p 3001 -b '0.0.0.0'"
    depends_on:
      - db

  db:
    image: mysql:8.0.16
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      MYSQL_HOST: 127.0.0.1
      MYSQL_DATABASE: app_development
      MYSQL_USERNAME: root
      MYSQL_ROOT_PASSWORD: root
    security_opt:
      - seccomp:unconfined
    ports:
      - "3306:3306"

Dockerfile

FROM ruby:2.6.5-stretch
ENV LANG C.UTF-8

ENV APP_ROOT /app
WORKDIR $APP_ROOT

RUN apt-get update && apt-get install -y --no-install-recommends \
    curl apt-transport-https wget && \
    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
    echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list && \
    curl -sL https://deb.nodesource.com/setup_8.x | bash - && \
    apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    vim \
    mysql-client \
    yarn \
    nodejs && \
    gem install bundler && \
    rm -rf /var/lib/apt/lists/*


COPY Gemfile $APP_ROOT
COPY Gemfile.lock $APP_ROOT
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
RUN bundle install

COPY . $APP_ROOT

EXPOSE 3001

procedure

docker-compose.yml

--Specify ports 3001: 3001 in the rails startup container app. --Similarly, specify to listen on the released 3001 port with command.

Dockerfile

--Specified to open port 3001 in EXPOSE

http://localhost:3001 Rails starts with.