Stefan Prodan stefanprodan

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

The new Docker daemon uses port: 2376 with TLS enable by default. Sometimes I want to play with curl on the old plain http port 2375. The trick is: use socat in a container to proxy the unix socket to a real port.

docker run -d \
  --volume /var/run/docker.sock:/var/run/docker.sock \
  --name docker-http \
  deb socat -d -d TCP-L:2375,fork UNIX:/var/run/docker.sock

	#!/usr/bin/env bash

	set -m # enable job control

	## run with "-d" command line switch to debug each step, script will wait for keypress to go on
	## integrated mods by KingdonB in his fork: https://gist.github.com/kingdonb/dec74f3b74ffbb83b54d53d5c033e508
	## added proper coredns patching via "coredns-custom" configmap
	## added automatic /etc/hosts file modification if needed, sudo password will be asked in case
	## added (commented out) lines to add Flux extra controllers to the setup
	## deployed podinfo as in Flux Get Started guide

	apiVersion: apps/v1
	kind: Deployment
	metadata:
	annotations:
	deployment.kubernetes.io/revision: "8"
	creationTimestamp: "2020-11-02T14:42:53Z"
	generation: 8
	labels:
	app.kubernetes.io/instance: flux
	app.kubernetes.io/version: latest

	{
	"check": {
	"id": "check-disk",
	"name": "check-disk",
	"script": "/usr/lib/nagios/plugins/check_disk -w 30% -c 5%",
	"interval": "1m"
	}
	}

	#!/bin/bash
	sudo /sbin/route add -net x.x.x.0/24 xxx.xxx.xxx.xxx

	# Save this file somewhere and make it executable (chmod a+x <file>)
	# Then run 'sudo defaults write com.apple.loginwindow LoginHook /Path/To/Your/Script'

	# first:
	lsbom -f -l -s -pf /var/db/receipts/org.nodejs.pkg.bom \| while read f; do sudo rm /usr/local/${f}; done
	sudo rm -rf /usr/local/lib/node /usr/local/lib/node_modules /var/db/receipts/org.nodejs.*

	# To recap, the best way (I've found) to completely uninstall node + npm is to do the following:

	# go to /usr/local/lib and delete any node and node_modules
	cd /usr/local/lib
	sudo rm -rf node*

	#!/bin/bash

	# Author: Erik Kristensen
	# Email: [email protected]
	# License: MIT
	# Nagios Usage: check_nrpe!check_docker_container!_container_id_
	# Usage: ./check_docker_container.sh _container_id_
	#
	# Depending on your docker configuration, root might be required. If your nrpe user has rights
	# to talk to the docker daemon, then root is not required. This is why root privileges are not

	using System;
	using System.Collections.Generic;
	using System.Linq.Expressions;
	using System.Reflection;

	namespace Bleroy.Helpers {
	public static class NotNull {
	public static TProp Get<TSource, TProp>(this TSource source, Expression<Func<TSource, TProp>> property) where TSource : class {
	if (source == null) return default(TProp);
	var current = property.Body;