#!/bin/bash

#
# create nginx configuration
#
CPU_COUNT=$(nproc)
conf+="user root;\n"
conf+="worker_processes ${CPU_COUNT};\n"
conf+="error_log stderr;\n"
conf+="events {\n"
conf+="\tworker_connections 1024;\n"
conf+="}\n"
conf+="http {\n"
conf+="\taccess_log off;\n"
conf+="\tinclude /etc/nginx/mime.types;\n"
conf+="\tdefault_type application/octet-stream;\n"
conf+="\tsendfile on;\n"
conf+="\tupstream dart_cluster {\n"
current=9001
end=$(($current+$CPU_COUNT))
while [ $current -lt $end ]; do
  conf+="\t\tserver 127.0.0.1:${current};\n"
  let current=current+1
done
conf+="\t\tkeepalive ${CPU_COUNT};\n"
conf+="\t}\n"
conf+="\tserver {\n"
conf+="\t\tlisten 8080;\n"
conf+="\t\tlocation / {\n"
conf+="\t\t\tproxy_pass http://dart_cluster;\n"
conf+="\t\t\tproxy_http_version 1.1;\n"
conf+="\t\t\tproxy_set_header Connection \"\";\n"
conf+="\t\t}\n"
conf+="\t}\n"
conf+="}"
#
# write nginx configuration to disk
#
echo -e $conf > nginx.conf