https://community.online.net/t/give-internet-access-to-private-network-servers/2805/7
Install OpenVPN server on jump host, and copy client config
wget https://git.io/vpn -O openvpn-install.sh && bash openvpn-install.sh
scp client.ovpn private:/root
Copy packages to private server
| /* | |
| * Fabrizio Calderan, twitter @fcalderan, 2010.11.02 | |
| * I had an idea: could Inception movie be explained by a few javascript closures | |
| * and variable resolution scope (just for fun)? | |
| * | |
| * Activate javascript console =) | |
| */ | |
| <script> | |
| console.group("inception movie"); |
| #!/bin/sh -x ## or just ` curl -Ls http://git.io/vRozn | sh `. | |
| ## Downloads the Mac OS X 10.10 Recovery Partition update, | |
| ## Copy's over the 10.10 version of Disk Utility.app, then | |
| ## use git to apply a binary patch so it will run on 10.11+. | |
| cd /tmp | |
| rm -rf DU1010 | |
| mkdir DU1010 |
| require 'rubygems' | |
| require 'faraday' | |
| require 'socksify' | |
| require 'socksify/http' | |
| require 'awesome_print' | |
| # This is a SOCKS monkey patch for Faraday, with example use/unit test. | |
| # Notes: | |
| # * It is altered to work with SOCKS5 authentication. | |
| # * net_http_class must return a Faraday::Adapter::NetHttp instance. |
Updated instructions based on this tutorial
Props to https://github.com/10flow figuring how this works. It needed very little updating
| #!/bin/bash | |
| echo "Container Linux installation script" | |
| echo "This will install:" | |
| echo " - Docker Community Edition" | |
| echo " - Docker Compose" | |
| echo " - Kubernetes: kubeadm, kubelet and kubectl" | |
| echo "" | |
| set -xeo pipefail |
| with table_stats as ( | |
| select psut.relname, | |
| psut.n_live_tup, | |
| 1.0 * psut.idx_scan / greatest(1, psut.seq_scan + psut.idx_scan) as index_use_ratio | |
| from pg_stat_user_tables psut | |
| order by psut.n_live_tup desc | |
| ), | |
| table_io as ( | |
| select psiut.relname, | |
| sum(psiut.heap_blks_read) as table_page_read, |
| [Unit] | |
| Description=Demonstrate Bash | |
| [Service] | |
| ExecStartPre=/usr/bin/bash -c "/usr/bin/systemctl set-environment MYVAR=$(( 2 + 2 ))" | |
| ExecStart=/usr/bin/echo "2 + 2 = ${MYVAR}" |
| # Update, upgrade and install development tools: | |
| apt-get update | |
| apt-get -y upgrade | |
| apt-get -y install build-essential | |
| apt-get -y install git-core | |
| # Install rbenv | |
| git clone git://github.com/sstephenson/rbenv.git /usr/local/rbenv | |
| # Add rbenv to the path: |
Сегодня попался рельсовый код, в котором используются монады, сервисы и прочее. Решил сделать обзор с объяснением того, что в коде не нравится и что можно исправить.
Данный разбор основан только на личном опыте и избегает попытку написать самый идеальный код на свете. К сожалению пошарить ссылку на код не могу, потому что автор попросил опубликовать анонимно.
Главная операция, которая вызывается из контроллера выглядит следующим образом: