Rails不能replacedatabase.yml中的ENV值
我在Docker容器中运行Rails应用程序，但是当我访问时，应用程序返回下面的错误
当我运行命令
erb config/database.yml envvariables被replace
泊坞窗 – 撰写：
version: '3' networks: banco: web: fila: services: db: image: postgres:9.6 env_file: - './docker/.env.db' networks: - banco app: build: . links: - db env_file: - './docker/.env.web' networks: - banco - web - fila depends_on: - db expose: - "3000" frontend: image: nginx:1.13 volumes: - ./docker/nginx/default:/etc/nginx/nginx.conf - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf ports: - 8081:80 networks: - web depends_on: - app
dockerfile：
FROM centos:7.4.1708 LABEL maintainer 'Blabla' # Pre install RUN yum -y install initscripts; \ yum clean all; \ yum -y update; \ yum -y install svn git git-svn telnet; \ yum -y install postgresql-devel gcc-c++ patch readline readline-devel zlib zlib-devel libcurl-devel ImageMagick ImageMagick-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison; # Ferramentas uteis RUN yum -y install bash-completion; \ yum -y install yum-plugin-priorities; \ yum -y install epel-release; \ yum -y install http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm; \ yum -y install vim-enhanced; \ yum -y install htop; RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB RUN \curl -L https://get.rvm.io | bash -s stable RUN /bin/bash -l -c "rvm requirements" RUN /bin/bash -l -c "rvm install 2.3" RUN /bin/bash -l -c "gem install bundler --no-ri --no-rdoc" RUN mkdir /usr/app WORKDIR /usr/app COPY . /usr/app RUN /bin/bash -l -c "bundle check || bundle install" RUN /bin/bash -l -c "RAILS_ENV=production bundle exec rake generate_secret_token" RUN /bin/bash -l -c "foreman export systemd /etc/systemd/system -u root -a redmine_visagio" CMD ["/sbin/init"]
database.yml的
default: &default adapter: postgresql encoding: utf8 host: db database: <%= ENV['DB_NAME'] %> username: <%= ENV['DB_USER'] %> password: <%= ENV['DB_PASSWORD'] %> development: <<: *default test: <<: *default production: <<: *default
nginx.conf
user nginx; worker_processes auto; error_log /var/log/nginx/error.log; pid /run/nginx.pid; env DB_NAME; env DB_USER; env DB_PASSWORD; # Load dynamic modules. See /usr/share/nginx/README.dynamic. include /usr/share/nginx/modules/*.conf; events { worker_connections 1024; } http { log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; # Load modular configuration files from the /etc/nginx/conf.d directory. # See http://nginx.org/en/docs/ngx_core_module.html#include # for more information. include /etc/nginx/conf.d/*.conf; }
.env.db：
POSTGRES_DB=redmine POSTGRES_USER=redmine POSTGRES_USER_PASSWORD=some_password
.env.web：
DB_NAME=redmine DB_USER=redmine DB_PASSWORD=some_password
集装箱检查结果：
... "Env": [ "DB_PASSWORD=redmine_db", "DB_NAME=redmine", "DB_USER=some_password", "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", "NGINX_VERSION=1.13.7-1~stretch", "NJS_VERSION=1.13.7.0.1.15-1~stretch" ], ...
我尝试与工头和轨道s，但错误发生在两个方面。 当variables被实际值replace时，应用程序正常工作
任何想法？ 谢谢！
这个问题已经通过@ user155995的答案从这个链接中解决了： rails database.yml不接受ERB
我刚刚经历过同样的事情，并遇到你的post。 我一直在跟着一个教程，让我创build一个包含以下代码的puma.conf文件：
ActiveRecord::Base.establish_connection( YAML.load_file( "#{app_dir}/config/database.yml" )[rails_env])我修改如下，一切都按预期工作：
require 'erb' ActiveRecord::Base.establish_connection( YAML.load( ERB.new( File.read( "#{app_dir}/config/database.yml" )).result)[rails_env])
感谢@Pavel Oganesyan和@AndrewSwerlick