Deoren Moor deoren

Chef scratch notes

Applying recipes locally

sudo chef-client --local-mode /path/to/recipe/file.rb

Resources

Main Queue

This object is available since 7.5.3. It permits to specify parameters for the main message queue. Note that only queue-parameters are permitted for this config object. This permits to set the same options like in ruleset and action queues. A special statement is needed for the main queue, because it is a different object and cannot be configured via any other object.

Note that when the main_queue() object is configured, the legacy $MainMsgQ... statements are ignored.

A Simple Example

main_queue(    
    queue.size="100000"      # how many messages (messages, not bytes!) to hold in memory

queue.type="LinkedList" # allocate memory dynamically for the queue. Better for handling spikes

Golang Scratch Notes

Assignment + Declaration vs assignment

`:=`

TODO: Confirm this statement

Using this operator results in a declaration (automatically I believe) and initial assignment. You can't go back later and use the operator again to assign a different value to the variable.

Example	whyaskwhy.org (bare)	rsyslog.com (WordPress integration)
1	section headers - default theme	section headers - default theme
2	section headers - guzzle theme	section headers - guzzle theme
3	section headers - readthedocs theme	section headers - readthedocs theme
4

These commands were run inside a VM, while the regular tweaking/editing was done in an editor outside of the VM.

ubuntu@ubuntu-devbox:/tmp/rsyslog-doc$

git reset HEAD --hard
git checkout update-release-script-to-use-docker-image
git pull --ff-only
cd tools/buildenv/
sudo docker build -t deoren/rsyslog_doc_gen:i536 $PWD/
sudo docker push deoren/rsyslog_doc_gen:i536

Docker: Ubuntu 16.04 container for testing

These notes are mainly for prepping a container for rsyslog testing, but generic enough to use as a basic Ubuntu 16.04 base

sudo docker pull ubuntu:16.04
sudo docker run -ti -p 2222:22 ubuntu:16.04
apt-get update
apt-get install software-properties-common
apt-add-repository ppa:adiscon/v8-stable
apt-get update

Notepad++ Regular Expressions

Common regexes that I find useful (or believe I will).

TODO: Sync with https://wiki.whyaskwhy.org/Programming:Regular_Expressions

Rsyslog changelog bullet points

This is used to insert spacing around the separate bullet points in the Rsyslog ChangeLog to make them easier to read.

	# Catch log messages generated by the Prosody daemon
	if $programname == 'prosody' then {

	# Skip logging of SASL AUTH log entries (base64 encoded username/passwords)
	# Note: recent updates to the mod_auth_dovecot module likely make
	# this unnecessary, but I left it in to protect against regressions
	if $msg contains ":auth_dovecot: sending" then {

	stop
	}

	#!/usr/bin/env python

	"""A message modification plugin to remove credentials

	Copyright (C) 2014 by Adiscon GmbH and Peter Slavov
	Copyright (C) 2016 by Datadog

	This file is part of rsyslog.

	Licensed under the Apache License, Version 2.0 (the "License");

	#------------------------------------------------------------------------------------
	#\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/\\|-\|-\|/
	#/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\/\|-\|-\|\
	#------------------------------------------------------------------------------------
	#\|\--
	#\|-\-Author: Chris Rakowitz
	#\|--\Purpose: Allows for Enabling and Disabling of the Windows Remote Managment
	#\|--/ Service.
	#\|-/-Date: October 10, 2015
	#\|/--Updated: June 21, 2016 (1.01)