krisnova

Kubernetes 1.17 on AWS with Cilium and Falco from scratch

Use these kubeadm configs and watch the live stream for more information on how to set up Kubernetes 1.17 on AWS with Cilium and Falco.

Master node

Kubeadm config

leodido

#!/usr/bin/env bash

NODE=kind-control-plane
IMG="docker.io/library/alpine"
POD="nsenter-$(tr -dc a-z0-9 < /dev/urandom | head -c 6)"
OVERRIDE="{\"spec\":{\"nodeName\":\"$NODE\",\"hostPID\":true,\"containers\":[{\"securityContext\":{\"privileged\":true},\"image\":\"${IMG}\",\"name\":\"nsenter\",\"stdin\":true,\"stdinOnce\":true,\"tty\":true,\"command\":[\"nsenter\",\"--target\",\"1\",\"--mount\",\"--uts\",\"--ipc\",\"--net\",\"--pid\",\"--\",\"bash\",\"-l\"]}]}}"

kubectl run --rm \
    --image "${IMG}" \
    --overrides="${OVERRIDE}" \

zimmertr

# Apply the metallb manifests to Kubernetes
kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.8.1/manifests/metallb.yaml

# Apply a metallb configuration to Kubernetes
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: ConfigMap
metadata:
  namespace: metallb-system
  name: config

StephenSorriaux

Installing Kubernetes on ArchLinux

Packages

pacman -S curl docker ebtables ethtool wget unzip

Also cfssl is needed but available on AUR, using pacaur

pacaur -S cfssl

jbeda

# This tells kubecfg to read its config from the local directory
export KUBECONFIG=./kubeconfig

# Looking at the cluster
kubectl get nodes
kubectl get pods --namespace=kube-system

# Running a single pod
kubectl run --generator=run-pod/v1 --image=gcr.io/kuar-demo/kuard-amd64:1 kuard
kubectl get pods

louisrawlins

#!/bin/sh
# 
# Just run this command (usage notes below):

pbpaste | xxd -r - FILENAME.EXT

# Script: restore_file_from_chrome_cache
# Author: Louis Rawlins (email@louisrawlins.com)
# Date: November 17, 2016 at 4:35:39 PM PST
# Description: Restore cache files from hex generated by Chrome (chrome://cache)

kokjo

// compile with: gcc -static -o sendfd sendfd.c
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <strings.h>

int send_fd(int sock, int fd){
    // This function does the arcane magic for sending
    // file descriptors over unix domain sockets
    struct msghdr msg;

lavalamp

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.

1. 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) }

eelsivart

#!/usr/bin/python

# Modified by Travis Lee
# Last Updated: 4/21/14
# Version 1.16
#
# -changed output to display text only instead of hexdump and made it easier to read
# -added option to specify number of times to connect to server (to get more data)
# -added option to send STARTTLS command for use with SMTP/POP/IMAP/FTP/etc... 
# -added option to specify an input file of multiple hosts, line delimited, with or without a port specified (host:port)

sh1n0b1

#!/usr/bin/python

# Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford (jspenguin@jspenguin.org)
# The author disclaims copyright to this source code.

import sys
import struct
import socket
import time
import select