In computing, memoization or memoisation
is an optimization technique used primarily
to speed up computer programs by storing
the results of expensive function calls and
returning the cached result when the same
inputs occur again.
— wikipedia
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#!/bin/bash | |
echo "Building NGINX along with Echo module" | |
# install prerequisites | |
yum -y install gcc gcc-c++ make zlib-devel pcre-devel openssl-devel | |
# download the Echo module | |
curl -L -O 'https://github.com/openresty/echo-nginx-module/archive/v0.58.tar.gz' | |
tar -xzvf v0.58.tar.gz && rm v0.58.tar.gz | |
mv echo-nginx-module-0.58 /tmp/echo-nginx-module |
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#!/bin/sh | |
docker rm -f $(docker ps -qa) | |
docker volume rm $(docker volume ls -q) | |
cleanupdirs="/var/lib/etcd /etc/kubernetes /etc/cni /opt/cni /var/lib/cni /var/run/calico /opt/rke" | |
for dir in $cleanupdirs; do | |
echo "Removing $dir" | |
rm -rf $dir | |
done |
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#!/bin/sh | |
# option 2: paste this into user-data to automate install via boot script | |
# NOTE: update --label=owner=YOURNAME below if you want to easily identify yours | |
# renames the host to have a suffix of alexellisio | |
export original=$(cat /etc/hostname) | |
sudo hostname $original-master-alexellisio | |
echo $original-master-alexellisio | sudo tee /etc/hostname | |
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D |
When hosting our web applications, we often have one public IP
address (i.e., an IP address visible to the outside world)
using which we want to host multiple web apps. For example, one
may wants to host three different web apps respectively for
example1.com
, example2.com
, and example1.com/images
on
the same machine using a single IP address.
How can we do that? Well, the good news is Internet browsers
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{ | |
"plugins": [ | |
"react" | |
], | |
"extends": "airbnb", | |
"env": { | |
"browser": true, | |
"node": true, | |
"es6": true | |
}, |