高可用负载均衡 haproxy+keepalived
Posted zisefeizhu
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服务器 20.0.0.206 10.0.0.206 bs-hk-hk01 高可用负载均衡节点 2c2g 20.0.0.207 10.0.0.207 bs-hk-hk02 高可用负载均衡节点 2c2g 软件版本 Keepalived 2.0.20 haproxy 2.1.2 Keepalived 安装配置 两个节点都安装 以bs-hk-hk01为例 #安装依赖包 [root@bs-hk-hk01 tools]#yum -y install gcc openssl-devel libnl3-devel pcre-devel [root@bs-hk-hk01 tools]# ls haproxy-2.1.2.tar.gz keepalived-2.0.20.tar.gz [root@bs-hk-hk01 tools]# tar -zvxf keepalived-2.0.20.tar.gz [root@bs-hk-hk01 keepalived-2.0.20]# ./configure --prefix=/usr/local/keepalived-2.0.20 [root@bs-hk-hk01 keepalived-2.0.20]# echo $? 0 [root@bs-hk-hk01 keepalived-2.0.20]# make && make install [root@bs-hk-hk01 keepalived-2.0.20]# echo $? 0 #配置文件放在默认路径 [root@bs-hk-hk01 keepalived-2.0.20]# mkdir /etc/keepalived/ [root@bs-hk-hk01 keepalived-2.0.20]# cp /usr/local/keepalived-2.0.20/etc/keepalived/keepalived.conf /etc/keepalived/ #keepalived启动脚本变量引用文件，默认文件路径是/etc/sysconfig/，也可以不做软链接，直接修改启动脚本中文件路径即可（安装目录下） [root@bs-hk-hk01 keepalived-2.0.20]# cp /usr/local/keepalived-2.0.20/etc/sysconfig/keepalived /etc/sysconfig/ [root@bs-hk-hk01 keepalived-2.0.20]# cp /tools/keepalived-2.0.20/keepalived/keepalived.service /etc/systemd/system/ # 将keepalived主程序加入到环境变量（安装目录下） [root@bs-hk-hk01 keepalived-2.0.20]# ln -s /usr/local/keepalived-2.0.20/sbin/keepalived /usr/sbin/ #keepalived启动脚本，这个从keepalived源码目录复制，安装目录中没有 [root@bs-hk-hk01 keepalived-2.0.20]# cp /tools/keepalived-2.0.20/keepalived/etc/init.d/keepalived /etc/init.d/ [root@bs-hk-hk01 keepalived-2.0.20]# chmod 755 /etc/init.d/keepalived [root@bs-hk-hk01 keepalived-2.0.20]# systemctl enable keepalived.service Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /etc/systemd/system/keepalived.service. [root@bs-hk-hk01 keepalived-2.0.20]# mkdir /var/log/keepalived [root@bs-hk-hk01 keepalived-2.0.20]# vim /etc/sysconfig/keepalived KEEPALIVED_OPTIONS="-D -d -S 0" [root@bs-hk-hk01 keepalived-2.0.20]# vim /etc/rsyslog.d/keepalived.conf local0.* /var/log/keepalived/keepalived.log #修改 /etc/rsyslog.conf 文件，添加如下： [root@bs-hk-hk01 log]# diff /etc/rsyslog.conf{,.bak} 74c74 < local0.* /var/log/keepalived/keepalived.log --- > [root@bs-hk-hk01 keepalived-2.0.20]# systemctl restart rsyslog [root@bs-hk-hk01 keepalived-2.0.20]# systemctl start keepalived.service [root@bs-hk-hk01 keepalived]# cp /lib/systemd/system/keepalived.service{,.bak} [root@bs-hk-hk01 keepalived]# !vim vim /lib/systemd/system/keepalived.service [root@bs-hk-hk01 keepalived]# diff /lib/systemd/system/keepalived.service{,.bak} 10,11c10,11 < EnvironmentFile=/etc/sysconfig/keepalived < ExecStart=/sbin/keepalived $KEEPALIVED_OPTIONS --- > EnvironmentFile=-/usr/local/keepalived-2.0.20/etc/sysconfig/keepalived > ExecStart=/usr/local/keepalived-2.0.20/sbin/keepalived $KEEPALIVED_OPTIONS [root@bs-hk-hk01 keepalived]# systemctl daemon-reload [root@bs-hk-hk01 keepalived]# systemctl restart keepalived.service keepalived 配置 #bs-hk-hk01 [root@bs-hk-hk01 keepalived]# cat keepalived.conf ! Configuration File for keepalived ! By zisefeizhu vrrp_script chk_haproxy_port { script "/service/scripts/chk_hapro.sh" interval 2 weight -5 fall 2 rise 1 } vrrp_instance kubernetes_master { state MASTER interface eth0 virtual_router_id 1 priority 150 advert_int 1 unicast_src_ip 20.0.0.206 unicast_peer { 20.0.0.207 } authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 20.0.0.250 dev eth0 label eth0:1 } track_script { chk_haproxy_port } } #bs-hk-hk02 [root@bs-hk-hk02 keepalived]# cp keepalived.conf{,.bak} [root@bs-hk-hk01 keepalived]# scp keepalived.conf 20.0.0.207:/etc/keepalived/keepalived.conf [root@bs-hk-hk02 keepalived]# cat keepalived.conf ! Configuration File for keepalived ! By zisefeizhu vrrp_script chk_haproxy_port { script "/service/scripts/chk_hapro.sh" interval 2 weight -5 fall 2 rise 1 } vrrp_instance kubernetes_master { state BACKUP interface eth0 virtual_router_id 1 priority 70 advert_int 1 unicast_src_ip 20.0.0.207 unicast_peer { 20.0.0.206 } authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 20.0.0.250 dev eth0 label eth0:1 } track_script { chk_haproxy_port } } [root@bs-hk-hk02 keepalived]# systemctl restart keepalived.service 测试 [root@bs-hk-hk01 keepalived]# systemctl stop keepalived.service [root@bs-hk-hk02 keepalived]# hostname -I 20.0.0.207 20.0.0.250 10.0.0.207 [root@bs-hk-hk01 keepalived]# systemctl restart keepalived.service [root@bs-hk-hk01 keepalived]# hostname -I 20.0.0.206 20.0.0.250 10.0.0.206 [root@bs-hk-hk02 keepalived]# hostname -I 20.0.0.207 10.0.0.207 # systemctl enable keepalived.service Haproxy 安装配置 两个节点都安装 以bs-hk-hk01为例 [root@bs-hk-hk01 ~]# yum install vim iotop bc gcc gcc-c++ glibc glibc-devel pcre pcre-devel openssl openssl-devel zip unzip zlib-devel net-tools lrzsz tree ntpdate telnet lsof tcpdump wget libevent libevent-devel bc systemd-devel bash-completion traceroute libtermcap-devel ncurses-devel libevent-devel readline-devel -y #LUA编译安装及Systemd开发包 [root@bs-hk-hk01 ~]# cd /tools/ [root@bs-hk-hk01 tools]# curl -R -O http://www.lua.org/ftp/lua-5.3.5.tar.gz [root@bs-hk-hk01 tools]# ls haproxy-2.1.2.tar.gz keepalived-2.0.20 keepalived-2.0.20.tar.gz lua-5.3.5.tar.gz [root@bs-hk-hk01 tools]# tar -zxvf lua-5.3.5.tar.gz [root@bs-hk-hk01 lua-5.3.5]# make linux [root@bs-hk-hk01 lua-5.3.5]# echo $? 0 [root@bs-hk-hk01 lua-5.3.5]# make INSTALL_TOP=/usr/local/lua install [root@bs-hk-hk01 lua-5.3.5]# echo $? 0 [root@bs-hk-hk01 lua-5.3.5]# yum install systemd-devel #安装haproxy [root@bs-hk-hk01 lua-5.3.5]# cd .. [root@bs-hk-hk01 tools]# ls haproxy-2.1.2.tar.gz keepalived-2.0.20 keepalived-2.0.20.tar.gz lua-5.3.5 lua-5.3.5.tar.gz [root@bs-hk-hk01 tools]# tar xf haproxy-2.1.2.tar.gz [root@bs-hk-hk01 tools]# cd haproxy-2.1.2/ [root@bs-hk-hk01 haproxy-2.1.2]# make -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_ZLIB=1 USE_LUA=1 LUA_LIB=/usr/local/lua/lib/ LUA_INC=/usr/local/lua/include/ USE_PCRE=1 USE_SYSTEMD=1 PREFIX=/usr/local/haproxy [root@bs-hk-hk01 haproxy-2.1.2]# make install PREFIX=/usr/local/haproxy [root@bs-hk-hk01 haproxy-2.1.2]# cp haproxy /usr/sbin/ #准备启动脚本 [root@bs-hk-hk01 haproxy-2.1.2]# vim /usr/lib/systemd/system/haproxy.service [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 #配置文件 [root@bs-hk-hk01 haproxy-2.1.2]# cd /etc/haproxy/ [root@bs-hk-hk01 log]# cat /etc/haproxy/haproxy.cfg #--------------------------------------------------------------------- # Global settings # By zisefeizhu #--------------------------------------------------------------------- global maxconn 10000 uid 99 gid 99 daemon nbproc 2 cpu-map 1 0 cpu-map 2 1 log 127.0.0.1 local3 info #log 127.0.0.1 local1 notice #默认配置 defaults log global mode http #option http-keep-alive option httpclose option forwardfor option abortonclose maxconn 10000 mode http timeout connect 300000ms timeout client 300000ms timeout server 300000ms balance leastconn #统计页面配置 listen stats bind 0.0.0.0:9999 mode http option httplog maxconn 10 stats refresh 30s stats enable log global stats uri /haproxy-status stats realm zisefeizhu Haproxy stats auth admin:zisefeizhu stats hide-version #K8S-API-Server frontend K8S_API bind *:8443 mode tcp default_backend k8s_api_nodes_6443 backend k8s_api_nodes_6443 mode tcp balance leastconn server 20.0.0.200 20.0.0.200:6443 check inter 2000 fall 3 rise 5 server 20.0.0.201 20.0.0.201:6443 check inter 2000 fall 3 rise 5 server 20.0.0.202 20.0.0.202:6443 check inter 2000 fall 3 rise 5 [root@bs-hk-hk01 haproxy]# mkdir /var/lib/haproxy [root@bs-hk-hk01 haproxy]# chown 99.99 /var/lib/haproxy/ -R [root@bs-hk-hk01 haproxy]# vim /etc/rsyslog.conf # 对如下两行取消注释 $ModLoad imudp $UDPServerRun 514 # 在末尾添加如下行 local3.* /var/log/haproxy/haproxy.log *.info;mail.none;authpriv.none;cron.none;local0.none;local3.none [root@bs-hk-hk01 log]# systemctl restart rsyslog [root@bs-hk-hk01 log]# systemctl enable haproxy.service Created symlink from /etc/systemd/system/multi-user.target.wants/haproxy.service to /usr/lib/systemd/system/haproxy.service. [root@bs-hk-hk01 haproxy]# systemctl start haproxy.service 设置服务启动顺序及依赖关系 [root@bs-hk-hk01 keepalived]# diff /usr/lib/systemd/system/keepalived.service{,.bak02} 3c3 < After=network-online.target syslog.target haproxy.service --- > After=network-online.target syslog.target 5d4 < Requires=haproxy.service [root@bs-hk-hk01 keepalived]# scp /usr/lib/systemd/system/keepalived.service 20.0.0.207:/usr/lib/systemd/system/keepalived.service 检查脚本 [root@bs-hk-hk01 keepalived]# mkdir /service/scripts -p [root@bs-hk-hk01 keepalived]# vim /service/scripts/chk_hapro.sh ########################################################################## #Author: zisefeizhu #QQ: 2********0 #Date: 2020-02-02 #FileName: /service/scripts/chk_hapro.sh #URL: https://www.cnblogs.com/zisefeizhu/ #Description: The test script #Copyright (C): 2020 All rights reserved ########################################################################## #!/bin/bash PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin export $PATH counts=$(ps -ef|grep -w "haproxy"|grep -v grep|wc -l) if [ "${counts}" = "0" ]; then systemctl restart keepalived.service sleep 2 counts=$(ps -ef|grep -w "haproxy"|grep -v grep|wc -l) if [ "${counts}" = "0" ]; then systemctl stop keepalived.service fi fi 查看日志 [root@bs-hk-hk01 log]# tree keepalived/ haproxy/ keepalived/ └── keepalived.log haproxy/ └── haproxy.log 0 directories, 2 files 完成！
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