标签：切换 sysconf ott 编译 优先级 div ima tco 子目录
yum -y install gcc #C++
yum -y install pcre-devel
yum -y install zlib-devel
定位到nginx 解压文件位置，执行编译安装命令
[root@localhost nginx-1.12.2]# pwd
/usr/local/nginx/nginx-1.12.2
[root@localhost nginx-1.12.2]# ./configure && make && make install
安装完成后先寻找那安装完成的目录位置
[root@localhost nginx-1.12.2]# whereis nginx
nginx: /usr/local/nginx
[root@localhost nginx-1.12.2]#
进入Nginx子目录sbin启动Nginx
[root@localhost sbin]# ls
nginx
[root@localhost sbin]# ./nginx &
[1] 5768
[root@localhost sbin]#
查看Nginx是否启动
或通过进程查看Nginx启动情况
[root@localhost sbin]# ps -aux|grep nginx
root 5769 0.0 0.0 20484 608 ? Ss 14:03 0:00 nginx: master process ./nginx
nobody 5770 0.0 0.0 23012 1620 ? S 14:03 0:00 nginx: worker process
root 5796 0.0 0.0 112668 972 pts/0 R+ 14:07 0:00 grep --color=auto nginx
[1]+ 完成 ./nginx
[root@localhost sbin]#
到此Nginx安装完成并启动成功。
编辑Nginx快捷启动脚本【注意Nginx安装路径，需要根据自己的NGINX路径进行改动】
[root@localhost init.d]# vim /etc/rc.d/init.d/nginx
1 #!/bin/sh 2 # 3 # nginx - this script starts and stops the nginx daemon 4 # 5 # chkconfig: - 85 15 6 # description: Nginx is an HTTP(S) server, HTTP(S) reverse 7 # proxy and IMAP/POP3 proxy server 8 # processname: nginx 9 # config: /etc/nginx/nginx.conf 10 # config: /usr/local/nginx/conf/nginx.conf 11 # pidfile: /usr/local/nginx/logs/nginx.pid 12 13 # Source function library. 14 . /etc/rc.d/init.d/functions 15 16 # Source networking configuration. 17 . /etc/sysconfig/network 18 19 # Check that networking is up. 20 [ "$NETWORKING" = "no" ] && exit 0 21 nginx="/usr/local/nginx/sbin/nginx" 22 prog=$(basename $nginx) 23 NGINX_CONF_FILE="/usr/local/nginx/conf/nginx.conf" 24 [ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx 25 lockfile=/var/lock/subsys/nginx 26 27 make_dirs() { 28 # make required directories 29 user=`$nginx -V 2>&1 | grep "configure arguments:" | sed ‘s/[^*]*--user=\([^ ]*\).*/\1/g‘ -` 30 if [ -z "`grep $user /etc/passwd`" ]; then 31 useradd -M -s /bin/nologin $user 32 fi 33 options=`$nginx -V 2>&1 | grep ‘configure arguments:‘` 34 for opt in $options; do 35 if [ `echo $opt | grep ‘.*-temp-path‘` ]; then 36 value=`echo $opt | cut -d "=" -f 2` 37 if [ ! -d "$value" ]; then 38 # echo "creating" $value 39 mkdir -p $value && chown -R $user $value 40 fi 41 fi 42 done 43 } 44 45 start() { 46 [ -x $nginx ] || exit 5 47 [ -f $NGINX_CONF_FILE ] || exit 6 48 make_dirs 49 echo -n $"Starting $prog: " 50 daemon $nginx -c $NGINX_CONF_FILE 51 retval=$? 52 echo 53 [ $retval -eq 0 ] && touch $lockfile 54 return $retval 55 } 56 57 stop() { 58 echo -n $"Stopping $prog: " 59 killproc $prog -QUIT 60 retval=$? 61 echo 62 [ $retval -eq 0 ] && rm -f $lockfile 63 return $retval 64 } 65 66 restart() { 67 #configtest || return $? 68 stop 69 sleep 1 70 start 71 } 72 73 reload() { 74 #configtest || return $? 75 echo -n $"Reloading $prog: " 76 killproc $nginx -HUP 77 RETVAL=$? 78 echo 79 } 80 81 force_reload() { 82 restart 83 } 84 85 configtest() { 86 $nginx -t -c $NGINX_CONF_FILE 87 } 88 89 rh_status() { 90 status $prog 91 } 92 93 rh_status_q() { 94 rh_status >/dev/null 2>&1 95 } 96 97 case "$1" in 98 start) 99 rh_status_q && exit 0 100 $1 101 ;; 102 stop) 103 104 rh_status_q || exit 0 105 $1 106 ;; 107 restart|configtest) 108 $1 109 ;; 110 reload) 111 rh_status_q || exit 7 112 $1 113 ;; 114 force-reload) 115 force_reload 116 ;; 117 status) 118 rh_status 119 ;; 120 condrestart|try-restart) 121 rh_status_q || exit 0 122 ;; 123 *) 124 echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}" 125 exit 2 126 esac
为启动脚本授权 并加入开机启动
[root@localhost init.d]# chmod -R 777 /etc/rc.d/init.d/nginx
[root@localhost init.d]# chkconfig nginx
启动Nginx
[root@localhost init.d]# ./nginx start
将Nginx加入系统环境变量
[root@localhost init.d]# echo ‘export PATH=$PATH:/usr/local/nginx/sbin‘>>/etc/profile && source /etc/profile
Nginx命令 [ service nginx (start|stop|restart) ]
[root@localhost init.d]# service nginx start
Starting nginx (via systemctl): [ 确定 ]
Tips:快捷命令
service nginx (start|stop|restart)
yum install -y popt-devel
yum install -y ipvsadm
yum install -y libnl*
yum install -y libnf*
yum install -y openssl-devel
[root@localhost keepalived-1.3.9]# ./configure
[root@localhost keepalived-1.3.9]# make && make install
[root@localhost etc]# mkdir /etc/keepalived
[root@localhost etc]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
手动复制默认的配置文件到默认路径
[root@localhost etc]# mkdir /etc/keepalived
[root@localhost etc]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
[root@localhost etc]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
为keepalived 创建软链接
[root@localhost sysconfig]# ln -s /usr/local/keepalived/sbin/keepalived /usr/sbin/
设置Keepalived开机自启动
[root@localhost sysconfig]# chkconfig keepalived on
注意：正在将请求转发到“systemctl enable keepalived.service”。
Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service
启动Keepalived服务
[root@localhost keepalived]# keepalived -D -f /etc/keepalived/keepalived.conf
关闭Keepalived服务
[root@localhost keepalived]# killall keepalived
环境准备：
CentOS 7.2
Keepalived Version 1.4.0 - December 29, 2017
Nginx Version: nginx/1.12.2
Tomcat Version:8
集群规划清单
| 虚拟机 | IP | 说明 |
|---|---|---|
| Keepalived+Nginx1[Master] | 192.168.43.101 | Nginx Server 01 |
| Keeepalived+Nginx[Backup] | 192.168.43.102 | Nginx Server 02 |
| Tomcat01 | 192.168.43.103 | Tomcat Web Server01 |
| Tomcat02 | 192.168.43.104 | Tomcat Web Server02 |
| VIP | 192.168.43.150 | 虚拟漂移IP |
更改TomcatServer01 节点ROOT/index.jsp 信息，加入TomcatIP地址，并加入Nginx值，即修改节点192.168.43.103信息如下：
<div id="asf-box">
<h1>${pageContext.servletContext.serverInfo}(192.168.224.103)<%=request.getHeader("X-NGINX")%></h1>
</div>
更改TomcatServer02 节点ROOT/index.jsp信息，加入TomcatIP地址，并加入Nginx值，即修改节点192.168.43.104信息如下：
<div id="asf-box">
<h1>${pageContext.servletContext.serverInfo}(192.168.224.104)<%=request.getHeader("X-NGINX")%></h1>
</div>
upstream tomcat {
server 192.168.43.103:8080 weight=1;
server 192.168.43.104:8080 weight=1;
}
server{
location / {
proxy_pass http://tomcat;
proxy_set_header X-NGINX "NGINX-1";
}
#......其他省略
}
upstream tomcat {
server 192.168.43.103:8080 weight=1;
server 192.168.43.104:8080 weight=1;
}
server{
location / {
proxy_pass http://tomcat;
proxy_set_header X-NGINX "NGINX-2";
}
#......其他省略
}
[root@localhost init.d]# service nginx start
Starting nginx (via systemctl): [ 确定 ]
此时访问 192.168.43.101 可以看到103和104节点Tcomat交替显示，说明Nginx服务已经将请求负载到了2台tomcat上。
check_nginx.sh文件信息如下：
#!/bin/bash
#时间变量，用于记录日志
d=`date --date today +%Y%m%d_%H:%M:%S`
#计算nginx进程数量
n=`ps -C nginx --no-heading|wc -l`
#如果进程为0，则启动nginx，并且再次检测nginx进程数量，
#如果还为0，说明nginx无法启动，此时需要关闭keepalived
if [ $n -eq "0" ]; then
/etc/rc.d/init.d/nginx start
n2=`ps -C nginx --no-heading|wc -l`
if [ $n2 -eq "0" ]; then
echo "$d nginx down,keepalived will stop" >> /var/log/check_ng.log
systemctl stop keepalived
fi
fi
添加完成后，为check_nginx.sh 文件授权，便于脚本获得执行权限。
[root@localhost keepalived]# chmod -R 777 /etc/keepalived/check_nginx.sh
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh" //检测nginx进程的脚本
interval 2
weight -20
}
global_defs {
notification_email {
//可以添加邮件提醒
}
}
vrrp_instance VI_1 {
state MASTER #标示状态为MASTER 备份机为BACKUP
interface ens33 #设置实例绑定的网卡(ip addr查看，需要根据个人网卡绑定)
virtual_router_id 51 #同一实例下virtual_router_id必须相同
mcast_src_ip 192.168.43.101
priority 250 #MASTER权重要高于BACKUP 比如BACKUP为240
advert_int 1 #MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
nopreempt #非抢占模式
authentication { #设置认证
auth_type PASS #主从服务器验证方式
auth_pass 123456
}
track_script {
check_nginx
}
virtual_ipaddress { #设置vip
192.168.43.150 #可以多个虚拟IP，换行即可
}
}
信息如下：
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh" //检测nginx进程的脚本
interval 2
weight -20
}
global_defs {
notification_email {
//可以添加邮件提醒
}
}
vrrp_instance VI_1 {
state BACKUP #标示状态为MASTER 备份机为BACKUP
interface ens33 #设置实例绑定的网卡(ip addr查看)
virtual_router_id 51 #同一实例下virtual_router_id必须相同
mcast_src_ip 192.168.43.102
priority 240 #MASTER权重要高于BACKUP 比如BACKUP为240
advert_int 1 #MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
nopreempt #非抢占模式
authentication { #设置认证
auth_type PASS #主从服务器验证方式
auth_pass 123456
}
track_script {
check_nginx
}
virtual_ipaddress { #设置vip
192.168.43.150 #可以多个虚拟IP，换行即可
}
}
Tips:关于配置信息的几点说明
[root@localhost keepalived]# keepalived -D -f /etc/keepalived/keepalived.conf
[root@localhost keepalived]# service nginx start
查看服务启动进程
[root@localhost keepalived]# ps -aux|grep nginx
root 6390 0.0 0.0 20484 612 ? Ss 19:13 0:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nobody 6392 0.0 0.0 23008 1628 ? S 19:13 0:00 nginx: worker process
root 6978 0.0 0.0 112672 968 pts/0 S+ 20:08 0:00 grep --color=auto nginx
查看Keepalived启动进程
[root@localhost keepalived]# ps -aux|grep keepalived
root 6402 0.0 0.0 45920 1016 ? Ss 19:13 0:00 keepalived -D -f /etc/keepalived/keepalived.conf
root 6403 0.0 0.0 48044 1468 ? S 19:13 0:00 keepalived -D -f /etc/keepalived/keepalived.conf
root 6404 0.0 0.0 50128 1780 ? S 19:13 0:00 keepalived -D -f /etc/keepalived/keepalived.conf
root 7004 0.0 0.0 112672 976 pts/0 S+ 20:10 0:00 grep --color=auto keepalived
使用 ip add 查看虚拟IP绑定情况，如出现192.168.43.150 节点信息则绑定到Master节点
[root@localhost keepalived]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:91:bf:59 brd ff:ff:ff:ff:ff:ff
inet 192.168.43.101/24 brd 192.168.43.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.43.150/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::9abb:4544:f6db:8255/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::b0b3:d0ca:7382:2779/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::314f:5fe7:4e4b:64ed/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:2b:74:aa brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:2b:74:aa brd ff:ff:ff:ff:ff:ff
[root@localhost keepalived]# clear
[root@localhost keepalived]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:14:df:79 brd ff:ff:ff:ff:ff:ff
inet 192.168.43.102/24 brd 192.168.43.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::314f:5fe7:4e4b:64ed/64 scope link
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:2b:74:aa brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:2b:74:aa brd ff:ff:ff:ff:ff:ff
[root@localhost keepalived]# killall keepalived
[root@localhost keepalived]# service nginx stop
此时强制刷新192.168.43.150发现 页面交替显示103和104并显示Nginx-2 ，VIP已转移到192.168.43.102上，已证明服务自动切换到备份节点上。
keepalived的HA分为抢占模式和非抢占模式，抢占模式即MASTER从故障中恢复后，会将VIP从BACKUP节点中抢占过来。非抢占模式即MASTER恢复后不抢占BACKUP升级为MASTER后的VIP。
非抢占模式配置：
Keepalived+Nginx+Tomcat 实现高可用Web集群(转)
标签：切换 sysconf ott 编译 优先级 div ima tco 子目录
原文地址：https://www.cnblogs.com/devin-ou/p/9524341.html
