nomadcanuck

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

This is a quick reference to get to Jolokia statistics urls for JBoss Fuse or JBoss A-MQ statistics. Sometimes, when you are interested in very specific attributes, it's easier to keep monitoring a specific url rather than loading the full Hawtio console.

List all MBeans
- GET
- POST
Search
GET

Example: Moving up to a few commits to another branch

Branch A has commits (X,Y) that also need to be in Branch B. The cherry-pick operations should be done in the same chronological order that the commits appear in Branch A.

cherry-pick does support a range of commits, but if you have merge commits in that range, it gets really complicated

git checkout branch-B
git cherry-pick X
git cherry-pick Y

Installing Python 2.7 on Centos 6.5

Centos 6.* comes with Python 2.6, but we can't just replace it with v2.7 because it's used by the OS internally (apparently) so you will need to install v2.7 (or 3.x, for that matter) along with it. Fortunately, CentOS made this quite painless with their Software Collections Repository

sudo yum update # update yum
sudo yum install centos-release-scl # install SCL 
sudo yum install python27 # install Python 2.7

To use it, you essentially spawn another shell (or script) while enabling the newer version of Python:

Converting a Word Document to Markdown in Two Moves

The Problem

A lot of important government documents are created and saved in Microsoft Word (*.docx). But Microsoft Word is a proprietary format, and it's not really useful for presenting documents on the web. So, I wanted to find a way to convert a .docx file into markdown.

The Solution

As it turns out, there are several open-source tools that allow for conversion between file types. Pandoc is one of them, and it's powerful. In fact, pandoc's website says "If you need to convert files from one markup format into another, pandoc is your swiss-army knife." But, although pandoc can convert from markdown into .docx, it doesn't work in the other direction.


	FILE SPACING:

	# double space a file
	sed G

	# double space a file which already has blank lines in it. Output file
	# should contain no more than one blank line between lines of text.
	sed '/^$/d;G'

	install_selenium_server_standalone() {
	local desired_version=${1:-latest}

	# Create our shell user
	init_shell_user "selenium" "*"

	local selenium_download_site="http://selenium-release.storage.googleapis.com"
	local selenium_releases=$(curl --silent --show-error "$selenium_download_site" \| grep --only-matching --perl-regexp '[0-9\.-\w]+?/selenium-server-standalone.*?\.jar' \| sort --reverse)

	if [ "$desired_version" == "latest" ]; then

	public class Permutations {

	public static <T> Stream<Stream<T>> of(final List<T> items) {
	return IntStream.range(0, factorial(items.size())).mapToObj(i -> permutation(i, items).stream());
	}

	private static int factorial(final int num) {
	return IntStream.rangeClosed(2, num).reduce(1, (x, y) -> x * y);
	}

	#!/bin/bash
	# Perform installation as root
	# Install prereqs

	yum -y install libcurl libcurl-devel rrdtool rrdtool-devel rrdtool-prel libgcrypt-devel gcc make gcc-c++

	# Get Collectd, untar it, make it and install

	wget http://collectd.org/files/collectd-5.4.0.tar.gz
	tar zxvf collectd-5.4.0.tar.gz

	import org.apache.poi.ss.usermodel.*
	import org.apache.poi.hssf.usermodel.*
	import org.apache.poi.xssf.usermodel.*
	import org.apache.poi.ss.util.*
	import org.apache.poi.ss.usermodel.*
	import java.io.*

	class GroovyExcelParser {
	//http://poi.apache.org/spreadsheet/quick-guide.html#Iterator