目前我正在使用docker设置我的应用.我有一个最小的rails应用程序,有1个控制器.你可以运行以下命令来获取我的设置:
rails new app --database=sqlite --skip-bundle
cd app
rails generate controller --skip-routes Home index
echo "Rails.application.routes.draw { root 'home#index' }" > config/routes.rb
echo "gem 'foreman'" >> Gemfile
echo "web: rails server -b 0.0.0.0" > Procfile
echo "port: 3000" > .foreman
我有以下设置:
Dockerfile:
FROM ruby:2.3
# Install dependencies
RUN apt-get update && apt-get install -y \
nodejs \
sqlite3 \
--no-install-recommends \
&& rm -rf /var/lib/apt/lists/*
# Configure bundle
RUN bundle config --global frozen 1
RUN bundle config --global jobs 7
# Expose ports and set entrypoint and command
EXPOSE 3000
CMD ["foreman","start"]
# Install Gemfile in different folder to allow caching
WORKDIR /tmp
COPY ["Gemfile","Gemfile.lock","/tmp/"]
RUN bundle install --deployment
# Set environment
ENV RAILS_ENV production
ENV RACK_ENV production
# Add files
ENV APP_DIR /app
RUN mkdir -p $APP_DIR
COPY . $APP_DIR
WORKDIR $APP_DIR
# Compile assets
RUN rails assets:precompile
VOLUME "$APP_DIR/public"
VOLUME“$APP_DIR / public”正在创建一个与Nginx容器共享的卷,它在Dockerfile中有这个:
FROM Nginx
ADD Nginx.conf /etc/Nginx/Nginx.conf
然后是docker-compose.yml:
version: '2'
services:
web:
build: config/docker/web
volumes_from:
- app
links:
- app:app
ports:
- 80:80
- 443:443
app:
build: .
environment:
SECRET_KEY_BASE: 'af3...ef0'
ports:
- 3000:3000
这有效,但只是我第一次构建它.如果我更改任何资产,并再次构建图像,它们就不会更新.可能因为图像构建时没有更新卷,我想是因为Docker如何处理缓存.
我希望每次运行docker-compose built&& amp;时都会更新资产.码头工人组成.知道怎么做到这一点?
最佳答案
Compose preserves volumes on recreate.
你有几个选择:
>不要为资产使用卷,而是在构建期间构建资产并将其添加或复制到Web容器中
> docker-compose rm应用程序在运行之前删除旧容器和卷.