phusion/passenger-docker: Docker base images for Ruby, Python, Node.js and Meteor web apps - 0 views
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Ubuntu 20.04 LTS as base system
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2.7.5 is configured as the default.
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Python 3.8
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A build system, git, and development headers for many popular libraries, so that the most popular Ruby, Python and Node.js native extensions can be compiled without problems.
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Nginx 1.18. Disabled by default
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production-grade features, such as process monitoring, administration and status inspection.
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Redis 5.0. Not installed by default.
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The image has an app user with UID 9999 and home directory /home/app. Your application is supposed to run as this user.
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running applications without root privileges is good security practice.
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Your application should be placed inside /home/app.
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COPY --chown=app:app
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Passenger works like a mod_ruby, mod_nodejs, etc. It changes Nginx into an application server and runs your app from Nginx.
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placing a .conf file in the directory /etc/nginx/sites-enabled
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The best way to configure Nginx is by adding .conf files to /etc/nginx/main.d and /etc/nginx/conf.d
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files in conf.d are included in the Nginx configuration's http context.
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any environment variables you set with docker run -e, Docker linking and /etc/container_environment, won't reach Nginx.
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To preserve these variables, place an Nginx config file ending with *.conf in the directory /etc/nginx/main.d, in which you tell Nginx to preserve these variables.
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By default, Phusion Passenger sets all of the following environment variables to the value production
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Setting these environment variables yourself (e.g. using docker run -e RAILS_ENV=...) will not have any effect, because Phusion Passenger overrides all of these environment variables.
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PASSENGER_APP_ENV environment variable
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passenger-docker autogenerates an Nginx configuration file (/etc/nginx/conf.d/00_app_env.conf) during container boot.
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The configuration file is in /etc/redis/redis.conf. Modify it as you see fit, but make sure daemonize no is set.
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You can add additional daemons to the image by creating runit entries.
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The shell script must be called run, must be executable
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the shell script must run the daemon without letting it daemonize/fork it.
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We use RVM to install and to manage Ruby interpreters.