Skip to main content

Home/ Larvata/ Group items tagged effect

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
張 旭

phusion/passenger-docker: Docker base images for Ruby, Python, Node.js and Meteor web apps - 0 views

github.com/...passenger-docker

docker ruby rails

shared by 張 旭 on 14 Jan 22 - No Cached
  • Ubuntu 20.04 LTS as base system
  • 2.7.5 is configured as the default.
  • Python 3.8
  • ...23 more annotations...
  • 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.
  • Nginx 1.18. Disabled by default
  • production-grade features, such as process monitoring, administration and status inspection.
  • Redis 5.0. Not installed by default.
  • The image has an app user with UID 9999 and home directory /home/app. Your application is supposed to run as this user.
  • running applications without root privileges is good security practice.
  • Your application should be placed inside /home/app.
  • COPY --chown=app:app
  • Passenger works like a mod_ruby, mod_nodejs, etc. It changes Nginx into an application server and runs your app from Nginx.
  • placing a .conf file in the directory /etc/nginx/sites-enabled
  • The best way to configure Nginx is by adding .conf files to /etc/nginx/main.d and /etc/nginx/conf.d
  • files in conf.d are included in the Nginx configuration's http context.
  • any environment variables you set with docker run -e, Docker linking and /etc/container_environment, won't reach Nginx.
  • 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.
  • By default, Phusion Passenger sets all of the following environment variables to the value production
  • 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.
  • PASSENGER_APP_ENV environment variable
  • passenger-docker autogenerates an Nginx configuration file (/etc/nginx/conf.d/00_app_env.conf) during container boot.
  • The configuration file is in /etc/redis/redis.conf. Modify it as you see fit, but make sure daemonize no is set.
  • You can add additional daemons to the image by creating runit entries.
  • The shell script must be called run, must be executable
  • the shell script must run the daemon without letting it daemonize/fork it.
  • We use RVM to install and to manage Ruby interpreters.
張 旭

chaifeng/ufw-docker: To fix the Docker and UFW security flaw without disabling iptables - 0 views

github.com/ufw-docker

iptables docker

shared by 張 旭 on 13 Jul 22 - No Cached
  • It requires to disable docker's iptables function first, but this also means that we give up docker's network management function.
  • This causes containers will not be able to access the external network.
  • such as -A POSTROUTING ! -o docker0 -s 172.17.0.0/16 -j MASQUERADE. But this only allows containers that belong to network 172.17.0.0/16 can access outside.
  • ...13 more annotations...
  • Don't need to disable Docker's iptables and let Docker to manage it's network.
  • The public network cannot access ports that published by Docker.
  • In a very convenient way to allow/deny public networks to access container ports without additional software and extra configurations
  • Enable Docker's iptables feature. Remove all changes like --iptables=false , including configuration file /etc/docker/daemon.json
  • Modify the UFW configuration file /etc/ufw/after.rules
  • There may be some unknown reasons cause the UFW rules will not take effect after restart UFW, please reboot servers.
  • If we publish a port by using option -p 8080:80, we should use the container port 80, not the host port 8080
  • allow the private networks to be able to visit each other.
  • The following rules block connection requests initiated by all public networks, but allow internal networks to access external networks.
  • Since the UDP protocol is stateless, it is not possible to block the handshake signal that initiates the connection request as TCP does.
  • For GNU/Linux we can find the local port range in the file /proc/sys/net/ipv4/ip_local_port_range. The default range is 32768 60999
  • It not only exposes ports of containers but also exposes ports of the host.
  • Cannot expose services running on hosts and containers at the same time by the same command.
  • 張 旭 on 13 Jul 22
     
    "It requires to disable docker's iptables function first, but this also means that we give up docker's network management function."
‹ Previous 21 - 22 of 22
Showing 20▼ items per page