【发布时间】：2022-08-19 03:19:27
【问题描述】：
我正在尝试使用 docker compose 在 Rails 中设置我的开发环境。得到一个错误说
ActiveRecord::AdapterNotSpecified: \'development\' database is not configured. Available: []Dockerfile：
# syntax=docker/dockerfile:1
FROM ruby:2.5.8
RUN apt-get update -qq && apt-get install -y nodejs postgresql-client
RUN apt-get install cron -y
RUN apt-get install vim -y
RUN export EDITOR=\"/usr/bin/vim\"
RUN addgroup deploy && adduser --system deploy && adduser deploy deploy
USER deploy
WORKDIR /ewagers
RUN (crontab -l 2>/dev/null || true; echo \"*/5 * * * * /config/schedule.rb -with args\") | crontab -
COPY Gemfile .
COPY Gemfile.lock .
RUN gem install bundler -v 2.2.27
RUN bundle install
COPY . .
USER root
COPY docker-entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/docker-entrypoint.sh
COPY wait-for-it.sh /usr/bin/
RUN chmod +x /usr/bin/wait-for-it.sh
RUN chown -R deploy *
RUN chmod 644 app
RUN chmod u+x app
RUN whenever --update-crontab ewagers --set environment=production
COPY config/database.example.yml ./config/database.yml
RUN mkdir data
ARG RAILS_MASTER_KEY
RUN printenv
EXPOSE 3000
# Configure the main process to run when running the image
CMD [\"rails\", \"server\", \"-b\", \"0.0.0.0\"]数据库.example.yml：
# database.yml
default: &default
adapter: postgresql
encoding: unicode
host: db
username: postgres
password: ewagers
pool: 5
development:
<<: *default
database: postgres码头工人撰写：
version: \"3.9\"
services:
app:
build: .
command: docker-entrypoint.sh
ports:
- 4000:3000
environment:
DB_URL: postgres://db/ewagers_dev # db is host, ewagers_dev is db name
RAILS_ENV: development
volumes:
- .:/ewagers # mapping our current directory to ewagers directory in the container
# - ewagers-sync:/ewagers:nocopy
image: ksun/ewagers:latest
depends_on:
- db
db:
image: postgres:12
volumes:
- ewagers_postgres_volume:/var/lib/postgresql/data # default storage location for postgres
environment:
POSTGRES_PASSWORD: ewagers
ports:
- 5432:5432 # default postgres port
volumes: # we specify a volume so postgres does not write data to temporary db of its container
ewagers_postgres_volume:我仔细检查了缩进和间距，完成了 docker build 以确保 database.example.yml 被复制到 database.yml。但是，它似乎甚至无法在 database.yml 中找到我的开发配置。
有趣的是，如果我的 database.example.yml 中有什么并在本地创建一个具有相同内容的 database.yml 文件，它将起作用。但如果没有它，它应该可以工作，因为我正在将 database.example.yml 复制到 dockerfile 中的 databse.yml 。
标签： ruby-on-rails postgresql docker docker-compose