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### KERNEL TUNING ###

# Increase size of file handles and inode cache
fs.file-max = 2097152

# Do less swapping
vm.swappiness = 10
vm.dirty_ratio = 60
vm.dirty_background_ratio = 2

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#!/bin/bash
# bash generate random alphanumeric string
#

# bash generate random 32 character alphanumeric string (upper and lowercase) and 
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)

# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1

lzbgt

#!/bin/bash
# bash generate random alphanumeric string
#

# bash generate random 32 character alphanumeric string (upper and lowercase) and 
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)

# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1

lzbgt

#!/usr/bin/env bash

# install docker
# https://docs.docker.com/engine/installation/linux/ubuntulinux/

# install docker-compose
# https://docs.docker.com/compose/install/

# install letsencrypt
# https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04

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https://dl.google.com/translate/offline/v3/r1/c.zip
https://dl.google.com/translate/offline/v3/r1/profiles.txt

lzbgt

https://dl.google.com/translate/offline/v3/r1/c.zip
https://dl.google.com/translate/offline/v3/r1/profiles.txt

lzbgt

http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-1.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-2.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-0.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-3.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-4.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-5.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-6.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-7.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-8.gz
http://storage.googleapis.com/books/ngrams/books/googlebooks-eng-all-1gram-20120701-9.gz

lzbgt

Easiest HDFS cluster in the world with kubernetes.

Inspiration from kimoonkim/kubernetes-HDFS

kubectl create -f namenode.yaml
kubectl create -f datanode.yaml

Setup a port-forward to so you can see it is alive:

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The Goal

Set up Kubernetes on 3 Debian Jessie virtual machines: One master. Two nodes. Additionally do this without any "magic" so that what is required to be running to make everything work is plain and obvious.

We will be using flannel for the inter-machine networking layer. Mainly because it is useful and it seems to be pretty popular.

The Setup

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Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

Prerequisites