- A+
所属分类：linux技术
环境：
- DNS服务器：192.168.10.200 仅主机模式
- internet服务器：192.168.10.123 仅主机模式
- web1：10.0.0.100 （安装apache2）NAT模式
- web2：10.0.0.18 （安装httpd） NAT模式
- HAProxy服务器：10.0.0.8（配备两块网卡，eth0NAT模式，属于内网；eth1 仅主机模式192.168.10.129，外网）
- 搭建DNS服务器
[root@dns ~]$ cat install_dns.sh #!/bin/bash # #*********************************************************** #Author: yanli #Date: 2022-10-25 #FileName: install_dns.sh #Description: #*********************************************************** DOMAIN=yanlinux.org HOST=www HOST_IP=192.168.10.129 CPUS=`lscpu |awk '/^CPU(s)/{print $2}'` . /etc/os-release color () { RES_COL=60 MOVE_TO_COL="echo -en \033[${RES_COL}G" SETCOLOR_SUCCESS="echo -en \033[1;32m" SETCOLOR_FAILURE="echo -en \033[1;31m" SETCOLOR_WARNING="echo -en \033[1;33m" SETCOLOR_NORMAL="echo -en E[0m" echo -n "$1" && $MOVE_TO_COL echo -n "[" if [ $2 = "success" -o $2 = "0" ] ;then ${SETCOLOR_SUCCESS} echo -n $" OK " elif [ $2 = "failure" -o $2 = "1" ] ;then ${SETCOLOR_FAILURE} echo -n $"FAILED" else ${SETCOLOR_WARNING} echo -n $"WARNING" fi ${SETCOLOR_NORMAL} echo -n "]" echo } install_dns () { if [ $ID = 'centos' -o $ID = 'rocky' ];then yum install -y bind bind-utils elif [ $ID = 'ubuntu' ];then color "不支持Ubuntu操作系统，退出!" 1 exit #apt update #apt install -y bind9 bind9-utils else color "不支持此操作系统，退出!" 1 exit fi } config_dns () { sed -i -e '/listen-on/s/127.0.0.1/localhost/' -e '/allow-query/s/localhost/any/' /etc/named.conf cat >> /etc/named.rfc1912.zones <<EOF zone "$DOMAIN" IN { type master; file "$DOMAIN.zone"; }; EOF cat > /var/named/$DOMAIN.zone <<EOF $TTL 1D @ IN SOA master admin ( 1 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum NS master master A `hostname -I` $HOST A $HOST_IP EOF chmod 640 /var/named/$DOMAIN.zone chgrp named /var/named/$DOMAIN.zone } start_service () { systemctl enable --now named systemctl is-active named.service if [ $? -eq 0 ] ;then color "DNS 服务安装成功!" 0 else color "DNS 服务安装失败!" 1 exit 1 fi } install_dns config_dns start_service #安装 [root@dns ~]$ sh install_dns.sh #在internet服务器上测试 [root@internet ~]$ ping www.yanlinux.org PING www.yanlinux.org (192.168.10.129) 56(84) bytes of data. 64 bytes from 192.168.10.129 (192.168.10.129): icmp_seq=1 ttl=64 time=0.358 ms 64 bytes from 192.168.10.129 (192.168.10.129): icmp_seq=2 ttl=64 time=0.475 ms ^C --- www.yanlinux.org ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1008ms rtt min/avg/max/mdev = 0.358/0.416/0.475/0.061 ms - 搭建两台web服务器
#web1搭建 [root@web1 ~]$ apt -y install apache2 [root@web1 ~]$ cat /var/www/html/index.html <h1>10.0.0.100 www.yanlinux.org</h1> #web2搭建 [root@web2 ~]$ yum -y install httpd [root@web2 ~]$ cat > /var/www/html/index.html <h1>10.0.0.18 www.yanlinux.org</h1> - 搭建HAProxy服务器
[root@haproxy ~]$ cat install_haproxy.sh #!/bin/bash HAPROXY_VERSION=2.6.9 HAPROXY_FILE=haproxy-${HAPROXY_VERSION}.tar.gz LUA_VERSION=5.4.4 LUA_FILE=lua-${LUA_VERSION}.tar.gz HAPROXY_INSTALL_DIR=/apps/haproxy SRC_DIR=/usr/local/src CWD=`pwd` CPUS=`lscpu|awk '/^CPU(s)/{print $2}'` LOCAL_IP=$(hostname -I|awk '{print $1}') STATS_AUTH_USER=admin STATS_AUTH_PASSWD=123456 . /etc/os-release color () { RES_COL=60 MOVE_TO_COL="echo -en \033[${RES_COL}G" SETCOLOR_SUCCESS="echo -en \033[1;32m" SETCOLOR_FAILURE="echo -en \033[1;31m" SETCOLOR_WARNING="echo -en \033[1;33m" SETCOLOR_NORMAL="echo -en E[0m" echo -n "$1" && $MOVE_TO_COL echo -n "[" if [ $2 = "success" -o $2 = "0" ] ;then ${SETCOLOR_SUCCESS} echo -n $" OK " elif [ $2 = "failure" -o $2 = "1" ] ;then ${SETCOLOR_FAILURE} echo -n $"FAILED" else ${SETCOLOR_WARNING} echo -n $"WARNING" fi ${SETCOLOR_NORMAL} echo -n "]" echo } check_file (){ if [ ! -e ${HAPROXY_FILE} ];then color "请下载${HAPROXY_FILE}文件！" 1 exit elif [ ! -e ${LUA_FILE} ];then color "请先下载${LUA_FILE}文件！" 1 exit else color "相关文件已准备" 0 fi } install_haproxy (){ #安装依赖环境 if [ $ID = "centos" -o $ID = "rocky" ];then yum -y install gcc make gcc-c++ glibc glibc-devel pcre pcre-devel openssl openssl-devel systemd-devel libtermcap-devel ncurses-devel libevent-devel readline-devel elif [ $ID = "ubuntu" ];then apt update apt -y install gcc make openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev libreadline-dev libsystemd-dev else color "不支持此操作系统！" 1 exit fi #安装lua环境 tar xf ${LUA_FILE} -C ${SRC_DIR} LUA_DIR=${LUA_FILE%.tar*} #变量高级用法，直接返回去掉.tar*的后缀 cd ${SRC_DIR}/${LUA_DIR} make all test #编译安装haproxy cd ${CWD} tar xf ${HAPROXY_FILE} -C ${SRC_DIR} HAPROXY_DIR=${HAPROXY_FILE%.tar*} cd ${SRC_DIR}/${HAPROXY_DIR} make -j ${CPUS} ARCH=x86_64 TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_CPU_AFFINITY=1 USE_LUA=1 LUA_INC=${SRC_DIR}/${LUA_DIR}/src/ LUA_LIB=${SRC_DIR}/${LUA_DIR}/src/ PREFIX=${HAPROXY_INSTALL_DIR} make install PREFIX=${HAPROXY_INSTALL_DIR} [ $? -eq 0 ] && color "HAProxy编译安装成功" 0 || { color "HAProxy编译安装失败，退出" 1;exit; } [ -L /usr/sbin/haproxy ] || ln -s ${HAPROXY_INSTALL_DIR}/sbin/haproxy /usr/sbin/ &> /dev/null [ -d /etc/haproxy ] || mkdir /etc/haproxy &> /dev/null [ -d /var/lib/haproxy/ ] || mkdir -p /var/lib/haproxy &> /dev/null #准备配置文件 cat > /etc/haproxy/haproxy.cfg <<EOF global maxconn 100000 stats socket /var/lib/haproxy/haproxy.sock mode 600 level admin uid 99 gid 99 daemon pidfile /var/lib/haproxy/haproxy.pid log 127.0.0.1 local3 info defaults option http-keep-alive option forwardfor maxconn 100000 mode http timeout connect 300000ms timeout client 300000ms timeout server 300000ms listen stats mode http bind 0.0.0.0:9999 stats enable log global stats uri /haproxy-status stats auth ${STATS_AUTH_USER}:${STATS_AUTH_PASSWD} EOF #创建用户 groupadd -g 99 haproxy useradd -u 99 -g haproxy -d /var/lib/haproxy -M -r -s /sbin/nologin haproxy #创建service文件 cat > /lib/systemd/system/haproxy.service <<EOF [Unit] Description=HAProxy Load Balancer After=syslog.target network.target [Service] ExecStartPre=/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -c -q ExecStart=/usr/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/lib/haproxy/haproxy.pid ExecReload=/bin/kill -USR2 $MAINPID [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl enable --now haproxy systemctl is-active haproxy &> /dev/null && color "HAProxy安装完成" 0 || { color "HAProxy安装失败" 1;exit; } echo "-------------------------------------------------------------------" echo -e "请访问链接: E[32;1mhttp://${LOCAL_IP}:9999/haproxy-statusE[0m" echo -e "用户和密码: E[32;1m${STATS_AUTH_USER}/${STATS_AUTH_PASSWD}E[0m" } main (){ check_file install_haproxy } main #安装haproxy [root@haproxy ~]$ sh install_haproxy.sh #配置proxies [root@haproxy ~]$ vi /etc/haproxy/haproxy.cfg #在文件最后加上下面几行信息 listen yanlinux_http_80 bind 192.168.10.129:80 mode http option forwardfor server web1 10.0.0.100:80 check inter 3000 fall 3 rise 5 server web2 10.0.0.18:80 check inter 3000 fall 3 rise 5 #检查语法 [root@haproxy ~]$ haproxy -c -f /etc/haproxy/haproxy.cfg Configuration file is valid #重启服务 [root@haproxy ~]$ systemctl restart haproxy.service #端口打开 [root@haproxy ~]$ ss -ntl State Recv-Q Send-Q Local Address:Port Peer Address:Port Process LISTEN 0 128 0.0.0.0:22 0.0.0.0:* LISTEN 0 128 0.0.0.0:9999 0.0.0.0:* LISTEN 0 128 192.168.10.129:80 0.0.0.0:* LISTEN 0 128 [::]:22 [::]:* - internet服务器测试连接
[root@internet ~]$ curl www.yanlinux.org <h1>10.0.0.100 www.yanlinux.org</h1> [root@internet ~]$ curl www.yanlinux.org <h1>10.0.0.18 www.yanlinux.org</h1> - 健康性检测
#停掉web1的服务 [root@web1 ~]$ systemctl stop apache2.service #internet测试，不会轮询到web1服务上了 [root@internet ~]$ curl www.yanlinux.org <h1>10.0.0.18 www.yanlinux.org</h1> [root@internet ~]$ curl www.yanlinux.org <h1>10.0.0.18 www.yanlinux.org</h1> [root@internet ~]$ curl www.yanlinux.org <h1>10.0.0.18 www.yanlinux.org</h1> 状态页也可以看出来web1下线了
