Jeff Schroeder SEJeff

Various formats of mapping data to function calls in Salt

Note

Legend

mod: Module name
fun: Function name (in module)

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

There are three easy to make mistakes in go. I present them here in the way they are often found in the wild, not in the way that is easiest to understand.

All three of these mistakes have been made in Kubernetes code, getting past code review at least once each that I know of.

Loop variables are scoped outside the loop.

What do these lines do? Make predictions and then scroll down.

func print(pi *int) { fmt.Println(*pi) }

The mustache gotcha

When using “bound” objects in an .aurora file it is an absolute that you do not have spaces in the “mustaches”.

Examples:

Bad: {{ profile.my_var }}
Good: {{profile.my_var}}

Docker Container Snafus

When running a docker container, you must ensure that all of the dependent library for the thermos_executor.pex are present in the docker container itself. The thermos_executor runs in the container not the mesos slaves environment.

	#!/bin/bash

	# Cronic v2 - cron job report wrapper
	# Copyright 2007 Chuck Houpt. No rights reserved, whatsoever.
	# Public Domain CC0: http://creativecommons.org/publicdomain/zero/1.0/

	set -eu

	OUT=/tmp/cronic.out.$$
	ERR=/tmp/cronic.err.$$

	import com.sun.net.httpserver.Filter;
	import com.sun.net.httpserver.HttpExchange;
	import com.sun.net.httpserver.HttpHandler;
	import com.sun.net.httpserver.HttpServer;

	import java.io.IOException;
	import java.net.HttpURLConnection;
	import java.net.InetSocketAddress;
	import java.util.Arrays;
	import java.util.List;

	Mute these words in your settings here: https://twitter.com/settings/muted_keywords

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	generic_activity_highlights
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	#!/bin/bash

	PUBLIC_INTERFACE=eth0

	# This assumes symmetric connection - for asymmetric connections need some more params
	TOTAL_BANDWIDTH=1000mbit

	# The following params would guarantee staked validaotrs 300 mbps undisturbed and
	# limit other traffic to 500 mbps.

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048