#!/bin/bash

#Instalacion de Loadbalancer simple.

hostname kublb01

cat <<EOF >  /etc/hostname
kublb01
EOF

# Add ip y nombres de hosts en todos los masters
cat <<EOF >> /etc/hosts
172.31.27.31 kub01
172.31.41.254 kub02
172.31.12.35 kub03
172.31.12.10 kublb01
172.31.12.20 minion1
172.31.12.21 minion2
EOF

apt-get update
apt-get install nginx nginx-extras -y

cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak

cat <<__EOF__>/etc/nginx/nginx.conf
worker_processes  1;
include /etc/nginx/modules-enabled/*.conf;
error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}
stream {
        upstream apiserver {
            server 172.31.27.31:6443 weight=5 max_fails=3 fail_timeout=03s;
            server 172.31.41.254:6443 weight=5 max_fails=3 fail_timeout=03s;
            server 172.31.12.35:6443 weight=5 max_fails=3 fail_timeout=03s;
            #server ${HOST_IP}:6443 weight=5 max_fails=3 fail_timeout=30s;
            #server ${HOST_IP}:6443 weight=5 max_fails=3 fail_timeout=30s;
        }

    server {
        listen 6443;
        proxy_connect_timeout 1s;
        proxy_timeout 3s;
        proxy_pass apiserver;
    }
}
__EOF__

systemctl restart nginx && systemctl status nginx && systemctl enable nginx