nginx create vhost

#!/bin/sh

craete_nginx_vhost() {
    # Example call: craete_nginx_vhost example.org 10.10.3.1:80
    [ -z "$1" -o -z "$2" ] && echo 'ERROR: $1 or $2 must be set!' && exit 1
    local vhostname=$1
    local backend=$2

    cat > /etc/nginx/sites-available/${vhostname}.conf <<_EOF_
server {
        listen 80;
        server_name $vhostname;

        include common.conf;

        client_body_timeout 300;
        client_max_body_size 1500m;

        location / {
                proxy_pass http://$backend;
                proxy_buffering on;
                proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;

                proxy_read_timeout 300;

                ### Set headers ####
                proxy_set_header Host \$host;
                proxy_set_header X-Real-IP \$remote_addr;
                #proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;

                ### By default we don't want to redirect it ####
                proxy_redirect off;
        }

        access_log /var/log/nginx/${vhostname}_access.log;
        error_log /var/log/nginx/${vhostname}_error.log;
}
_EOF_
}

# For example call function:
craete_nginx_vhost example.org 10.10.3.1:80