Ondrej Brablc brablc

This (and related gists) captures how i created my docker swarm architecture. This is intended mostly for my own notes incase i need to re-creeate anything later! As such expect some typos and possibly even an error...

Installation Step-by-Step

Each major task has its own gist, this is to help with maitainability long term.

How to link to headings in GitHub issues and pull requests

If you have an issue comment / PR description on GitHub, it doesn't automatically get anchors / IDs that you could link to:

What I like to do is to add a visible # character like this:

2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

Bash Shortcuts

Moving

command	description
ctrl + a	Goto BEGINNING of command line

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

Never touch your local /etc/hosts file in OS X again

To setup your computer to work with *.test domains, e.g. project.test, awesome.test and so on, without having to add to your hosts file each time.

Requirements

Homebrew
Mountain Lion -> High Sierra

	SELECT table,
	formatReadableSize(sum(bytes)) as size,
	min(min_date) as min_date,
	max(max_date) as max_date
	FROM system.parts
	WHERE active
	GROUP BY table

	" run command
	" no stdin
	" output displayed in "Press enter to continue" style
	" current buffer untouched
	:!uptime

	" run command
	" pipe range of text to command on stdin
	" output replaces the range in the current buffer
	:RANGE!grep foo

	#!/usr/bin/osascript

	-- Launche multiple SSH session
	-- completely rewritten but inspired by github:xgdlm/iterm2-cssh

	on run argv

	set serverList to argv

	-- Print help if no servers are given

	# ----------------------
	# installing dnsmasq and enable daemon
	# ----------------------
	brew install dnsmasq
	sudo cp -v $(brew --prefix dnsmasq)/homebrew.mxcl.dnsmasq.plist /Library/LaunchDaemons
	# ----------------------
	# adding resolver for vbox domain
	# ----------------------
	[ -d /etc/resolver ] \|\| sudo mkdir -v /etc/resolver
	sudo bash -c 'echo "nameserver 127.0.0.1" > /etc/resolver/vbox'