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#!/bin/sh
#
# This script sets up the HAProxy load balancer initially, configured with
# no working backend servers. Presumably in a real environment you would
# do this sort of setup with a real configuration management system. For
# this demo, however, this shell script will suffice.
#
set -e
# Install HAProxy
sudo apt-get update
sudo apt-get install -y haproxy
# Configure it in a jank way
cat <<EOF >/tmp/haproxy.cfg
global
daemon
maxconn 256
defaults
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
listen stats
bind *:9999
mode http
stats enable
stats uri /
stats refresh 2s
listen http-in
bind *:80
balance roundrobin
option http-server-close
EOF
sudo mv /tmp/haproxy.cfg /etc/haproxy/haproxy.cfg
# Enable HAProxy
cat <<EOF >/tmp/haproxy
ENABLED=1
EOF
sudo mv /tmp/haproxy /etc/default/haproxy
# Start it
sudo /etc/init.d/haproxy start
|
