#!/bin/bash

# eastmoney public tools

# version: v1.0.1

# create by XuHoo, 2016-9-28

#

function environment() {

    if [[ "$USER" != "root" ]]; then

        echo "Current user is not root"

        return 1

    fi

    yum -y install wget curl pcre pcre-devel zlib zlib-devel gcc gcc-c++ &> /tmp/nginx_install.log

    # getUrl: Input download source address

    # getUrl='http://172.16.1.1\nginx-1.8.1.tar.gz'

    wget -P /tmp/ $getUrl/nginx.tar.gz

    grep "nginx" /etc/passwd > /dev/null

    if [[ $? -ne 0 ]]; then  # check user and group

        groupadd nginx

        useradd -M -g nginx -s /sbin/nologin nginx

    fi

    cd /tmp; tar -zxf nginx.tar.gz; cd nginx

    return 0

}; environment; [ $? -ne 0 ] && exit 1

function install() {

    # Compile before installation configuration

    ./configure --prefix=/usr/local/nginx \

                --user=nginx --group=nginx \

                --with-http_stub_status_module \

                &> /tmp/nginx_install.log

    if [[ $? -ne 0 ]]; then

        return 1

    else

        # make && make install

        make &> /tmp/nginx_install.log

        make install &> /tmp/nginx_install.log

        if [[ $? -ne 0 ]]; then

            return 1

        fi

        return 0

    fi

}; install; [ $? -ne 0 ] && exit 1

function optimize() {

    ln -s /usr/local/nginx/sbin/* /usr/local/sbin/ > /dev/null

    cp -f /tmp/nginx_control.sh /etc/init.d/nginx

    cp -f /tmp/nginx.conf /usr/local/nginx/conf/nginx.conf

    # The number of CPU cores current server,

    # Amend the "worker_processes" field to the value of the processor

    processor=`cat /proc/cpuinfo | grep "processor" | wc -l`

    sed -i "s/^w.*;$/worker_processes  ${processor};/g" /usr/local/nginx/conf/nginx.conf

    chmod +x /etc/init.d/nginx

    chkconfig --add nginx

    retval=`chkconfig --level 3 nginx on`  # Configure nginx open start service

    return $retval

}; optimize; [ $? -ne 0 ] && exit 1

function run() {

    # Test nginx.conf file syntax is correct

    /etc/init.d/nginx test &> /tmp/nginx_run.log

    if [[ $? -ne 0 ]]; then

        retval=$?

    else  # Start nginx server

        /etc/init.d/nginx start &> /tmp/nginx_run.log

        if [[ $? -ne 0 ]]; then

            retval=$?

        fi

    fi

    return 0

}; run; [ $? -ne 0 ] && exit 1

function check() {

    # Modified index.html page content

    content=$"deployment on $(date "+%Y-%m-%d %H:%M:%S")"

    echo $content > /usr/local/nginx/html/index.html

    # View the index.html, and the output of the modified index.html page

    /etc/init.d/nginx status

    echo -n "Index.html: "; curl http://localhost

}; check