keepalived+nginx+apache主备及双活搭建测试
keepalived+nginx高可用有主备和双活两种方式。主备方式下对外提供一个vip，同时只有一台服务器工作，另一台作备机；双活方式下对外提供两个vip，两台机器互为备份，下面详细说明搭建测试步骤：
** 配置：**
主机 ip 操作系统 软件 vip
nginx01 192.168.2.185 Centos7 nginx 端口82
keepalived 192.168.2.189
nginx02 192.168.2.186 Centos7 nginx 端口82
keepalived 192.168.2.189
web01 192.168.2.187 Centos7 apache 端口80 /
web02 192.168.2.188 Centos7 apache 端口80 /
1.nginx01安装nginx
[root@nginx01 ~]# cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core)
[root@nginx01 ~]# yum -y install gcc-c++
[root@nginx01 ~]# yum -y install pcre pcre-devel
[root@nginx01 ~]# yum -y install zlib zlib-devel
[root@nginx01 ~]# yum -y install openssl openssl-devel
下载https://nginx.org/en/download.html
https://nginx.org/download/nginx-1.12.2.tar.gz
[root@nginx01 ~]# mkdir software
[root@nginx01 ~]# cd software/
[root@nginx01 software]# wget https://nginx.org/download/nginx-1.12.2.tar.gz
[root@nginx01 software]# ls -ltr
total 960
-rw-r--r--. 1 root root 981687 Oct 17 21:20 nginx-1.12.2.tar.gz
[root@nginx01 software]# tar -zxvf nginx-1.12.2.tar.gz
[root@nginx01 software]# chown -R root.root nginx-1.12.2
[root@nginx01 software]# groupadd nginx
[root@nginx01 software]# useradd -g nginx -d /home/nginx -s /sbin/nologin nginx
[root@nginx01 software]# id nginx
uid=1000(nginx) gid=1000(nginx) groups=1000(nginx)
[root@nginx01 software]# grep nginx /etc/passwd
nginx:x:1000:1000::/home/nginx:/sbin/nologin
[root@nginx01 software]#
[root@nginx01 nginx-1.12.2]# ./configure --user=nginx --group=nginx --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_sub_module --with-http_gzip_static_module | tee -a configure_nginx_20180417.log
.......
.......
.......
Configuration summary
+ using system PCRE library
+ using system OpenSSL library
+ using system zlib library
nginx path prefix: "/usr/local/nginx"
nginx binary file: "/usr/local/nginx/sbin/nginx"
nginx modules path: "/usr/local/nginx/modules"
nginx configuration prefix: "/usr/local/nginx/conf"
nginx configuration file: "/usr/local/nginx/conf/nginx.conf"
nginx pid file: "/usr/local/nginx/logs/nginx.pid"
nginx error log file: "/usr/local/nginx/logs/error.log"
nginx http access log file: "/usr/local/nginx/logs/access.log"
nginx http client request body temporary files: "client_body_temp"
nginx http proxy temporary files: "proxy_temp"
nginx http fastcgi temporary files: "fastcgi_temp"
nginx http uwsgi temporary files: "uwsgi_temp"
nginx http scgi temporary files: "scgi_temp"
[root@nginx01 nginx-1.12.2]# make && make install | tee -a make_make_install_nginx_20180417.log
.........
.........
.........
objs/ngx_modules.o \
-ldl -lpthread -lcrypt -lpcre -lssl -lcrypto -ldl -lz \
-Wl,-E
sed -e "s|%%PREFIX%%|/usr/local/nginx|" \
-e "s|%%PID_PATH%%|/usr/local/nginx/logs/nginx.pid|" \
-e "s|%%CONF_PATH%%|/usr/local/nginx/conf/nginx.conf|" \
-e "s|%%ERROR_LOG_PATH%%|/usr/local/nginx/logs/error.log|" \
< man/nginx.8 > objs/nginx.8
make[1]: Leaving directory `/root/software/nginx-1.12.2'
make -f objs/Makefile install
make[1]: Entering directory `/root/software/nginx-1.12.2'
test -d '/usr/local/nginx' || mkdir -p '/usr/local/nginx'
test -d '/usr/local/nginx/sbin' \
|| mkdir -p '/usr/local/nginx/sbin'
test ! -f '/usr/local/nginx/sbin/nginx' \
|| mv '/usr/local/nginx/sbin/nginx' \
'/usr/local/nginx/sbin/nginx.old'
cp objs/nginx '/usr/local/nginx/sbin/nginx'
test -d '/usr/local/nginx/conf' \
|| mkdir -p '/usr/local/nginx/conf'
cp conf/koi-win '/usr/local/nginx/conf'
cp conf/koi-utf '/usr/local/nginx/conf'
cp conf/win-utf '/usr/local/nginx/conf'
test -f '/usr/local/nginx/conf/mime.types' \
|| cp conf/mime.types '/usr/local/nginx/conf'
cp conf/mime.types '/usr/local/nginx/conf/mime.types.default'
test -f '/usr/local/nginx/conf/fastcgi_params' \
|| cp conf/fastcgi_params '/usr/local/nginx/conf'
cp conf/fastcgi_params \
'/usr/local/nginx/conf/fastcgi_params.default'
test -f '/usr/local/nginx/conf/fastcgi.conf' \
|| cp conf/fastcgi.conf '/usr/local/nginx/conf'
cp conf/fastcgi.conf '/usr/local/nginx/conf/fastcgi.conf.default'
test -f '/usr/local/nginx/conf/uwsgi_params' \
|| cp conf/uwsgi_params '/usr/local/nginx/conf'
cp conf/uwsgi_params \
'/usr/local/nginx/conf/uwsgi_params.default'
test -f '/usr/local/nginx/conf/scgi_params' \
|| cp conf/scgi_params '/usr/local/nginx/conf'
cp conf/scgi_params \
'/usr/local/nginx/conf/scgi_params.default'
test -f '/usr/local/nginx/conf/nginx.conf' \
|| cp conf/nginx.conf '/usr/local/nginx/conf/nginx.conf'
cp conf/nginx.conf '/usr/local/nginx/conf/nginx.conf.default'
test -d '/usr/local/nginx/logs' \
|| mkdir -p '/usr/local/nginx/logs'
test -d '/usr/local/nginx/logs' \
|| mkdir -p '/usr/local/nginx/logs'
test -d '/usr/local/nginx/html' \
|| cp -R html '/usr/local/nginx'
test -d '/usr/local/nginx/logs' \
|| mkdir -p '/usr/local/nginx/logs'
make[1]: Leaving directory `/root/software/nginx-1.12.2'
[root@nginx01 nginx-1.12.2]# cd /usr/local/nginx/sbin/
[root@nginx01 sbin]# ln -s /usr/local/nginx/sbin/nginx /usr/local/bin/nginx
[root@nginx01 sbin]# nginx -v
nginx version: nginx/1.12.2
[root@nginx01 sbin]#
查看加载模块
[root@nginx01 sbin]# nginx -V
nginx version: nginx/1.12.2
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)
built with OpenSSL 1.0.2k-fips 26 Jan 2017
TLS SNI support enabled
configure arguments: --user=nginx --group=nginx --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_sub_module --with-http_gzip_static_module
[root@nginx01 sbin]#
Nginx相关启动任务
[root@nginx01 sbin]# nginx
[root@nginx01 sbin]# ps -ef | grep nginx
root 5241 1 0 00:35 ? 00:00:00 nginx: master process nginx
nginx 5242 5241 0 00:35 ? 00:00:00 nginx: worker process
root 5244 2517 1 00:35 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 sbin]# nginx -s stop
[root@nginx01 sbin]# ps -ef | grep nginx
root 5247 2517 0 00:35 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 sbin]# nginx -s quit
nginx: [error] open() "/usr/local/nginx/logs/nginx.pid" failed (2: No such file or directory)
[root@nginx01 sbin]# nginx
[root@nginx01 sbin]# nginx -s quit
[root@nginx01 sbin]# ps -ef | grep nginx
root 5254 2517 0 00:36 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 sbin]# nginx
[root@nginx01 sbin]# nginx -s reload
[root@nginx01 sbin]#
[root@nginx01 sbin]# ps -ef | grep nginx
root 5257 1 0 00:36 ? 00:00:00 nginx: master process nginx
nginx 5260 5257 0 00:36 ? 00:00:00 nginx: worker process
root 5262 2517 0 00:36 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 sbin]# nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@nginx01 sbin]#
nginx -s quit:此方式停止步骤是待nginx进程处理任务完毕进行停止。
nginx -s stop:此方式相当于先查出nginx进程id再使用kill命令强制杀掉进程。
nginx -s reload:动态加载，当配置文件nginx.conf有变化时执行该命令动态加载。
Nginx开机自启动
[root@nginx01 sbin]# cd /etc/rc.d
[root@nginx01 rc.d]# ls -ltr
total 4
-rw-r--r--. 1 root root 473 Nov 7 2016 rc.local
drwxr-xr-x. 2 root root 70 Mar 12 18:54 init.d
drwxr-xr-x. 2 root root 45 Mar 12 18:54 rc6.d
drwxr-xr-x. 2 root root 45 Mar 12 18:54 rc5.d
drwxr-xr-x. 2 root root 45 Mar 12 18:54 rc4.d
drwxr-xr-x. 2 root root 45 Mar 12 18:54 rc3.d
drwxr-xr-x. 2 root root 45 Mar 12 18:54 rc2.d
drwxr-xr-x. 2 root root 45 Mar 12 18:54 rc1.d
drwxr-xr-x. 2 root root 45 Mar 12 18:54 rc0.d
[root@nginx01 rc.d]# cat rc.local
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.
touch /var/lock/subsys/local
[root@nginx01 rc.d]# echo "/usr/local/nginx/sbin/nginx" > rc.local
[root@nginx01 rc.d]# chmod u+x rc.local
[root@nginx01 rc.d]# view rc.local
[root@nginx01 rc.d]# cat rc.local
/usr/local/nginx/sbin/nginx
[root@nginx01 rc.d]# ls -ltr rc.local
-rwxr--r--. 1 root root 28 Apr 18 00:39 rc.local
[root@nginx01 rc.d]# ps -ef | grep nginx
root 5257 1 0 00:36 ? 00:00:00 nginx: master process nginx
nginx 5260 5257 0 00:36 ? 00:00:00 nginx: worker process
root 5271 2517 0 00:39 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 rc.d]# nginx -s quit
[root@nginx01 rc.d]# ps -ef | grep nginx
root 5274 2517 0 00:39 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 rc.d]# ./rc.local
[root@nginx01 rc.d]# ps -ef | grep nginx
root 5277 1 0 00:39 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
nginx 5278 5277 0 00:39 ? 00:00:00 nginx: worker process
root 5280 2517 0 00:39 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 rc.d]#
至此nginx安装成功,nginx02也按nginx01的上面的操作执行一遍
2.配置nginx
[root@nginx01 rc.d]# cp -p /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bk.2018
[root@nginx01 rc.d]# grep -v '#' /usr/local/nginx/conf/nginx.conf
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
server {
listen 80;
server_name localhost;
location / {
root html;
index index.html index.htm;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
[root@nginx01 rc.d]# cp -p /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bk.2018
[root@nginx01 rc.d]# vi /usr/local/nginx/conf/nginx.conf
[root@nginx01 rc.d]# diff /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bk.2018
34,37d33
< upstream webser{
< server 192.168.2.187:80;
< server 192.168.2.188:80;
< }
48,50c44,45
< proxy_pass http://webser;
< #root html;
< #index index.html index.htm;
---
> root html;
> index index.html index.htm;
[root@nginx01 rc.d]# cat /usr/local/nginx/conf/nginx.conf
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
upstream webser{
server 192.168.2.187:80;
server 192.168.2.188:80;
}
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
proxy_pass http://webser;
#root html;
#index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# location / {
# root html;
# index index.html index.htm;
# }
#}
# HTTPS server
#
#server {
# listen 443 ssl;
# server_name localhost;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}
[root@nginx01 rc.d]#
[root@nginx01 rc.d]# grep -v '#' /usr/local/nginx/conf/nginx.conf
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
upstream webser{
server 192.168.2.187:80;
server 192.168.2.188:80;
}
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://webser;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
重启nginx生效
[root@nginx01 rc.d]# nginx -s reload
[root@nginx01 rc.d]# nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@nginx01 rc.d]# nginx -s quit
[root@nginx01 rc.d]# ps -ef | grep nginx
root 5299 2517 0 00:52 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 rc.d]# nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@nginx01 rc.d]# nginx
[root@nginx01 rc.d]# ps -ef | grep nginx
root 5302 1 0 00:52 ? 00:00:00 nginx: master process nginx
nginx 5303 5302 0 00:52 ? 00:00:00 nginx: worker process
root 5305 2517 0 00:52 pts/0 00:00:00 grep --color=auto nginx
[root@nginx01 rc.d]#
nginx01 nginx配置完成
nginx02 也按照上面一样的配置
[root@nginx02 rc.d]# cp -p /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bk.20180417
[root@nginx01 rc.d]# scp -p /usr/local/nginx/conf/nginx.conf 192.168.2.186:/usr/local/nginx/conf/nginx.conf
The authenticity of host '192.168.2.186 (192.168.2.186)' can't be established.
ECDSA key fingerprint is eb:04:83:e8:3d:6e:e6:95:f0:c6:9c:6c:ba:78:34:66.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.2.186' (ECDSA) to the list of known hosts.
root@192.168.2.186's password:
nginx.conf 100% 2800 2.7KB/s 00:00
[root@nginx01 rc.d]#
[root@nginx02 rc.d]# grep -v '#' /usr/local/nginx/conf/nginx.conf
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
upstream webser{
server 192.168.2.187:80;
server 192.168.2.188:80;
}
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://webser;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
[root@nginx02 rc.d]# nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
[root@nginx02 rc.d]# nginx
[root@nginx02 rc.d]# ps -ef | grep nginx
root 5306 1 0 00:57 ? 00:00:00 nginx: master process nginx
nginx 5307 5306 0 00:57 ? 00:00:00 nginx: worker process
root 5309 2524 0 00:57 pts/0 00:00:00 grep --color=auto nginx
[root@nginx02 rc.d]#
至此2台nginx配置成功
3.keepalived 的安装
[root@nginx01 softare]# pwd
/root/softare
[root@nginx01 software]# yum -y install keepalived | tee -a install_keepalived_20180417.log
[root@nginx02 softare]# yum -y install keepalived | tee -a install_keepalived_20180417.log
Keepalived 配置
查看keepalived 安装了那些文件
[root@nginx01 softare]# rpm -qa keepalived
keepalived-1.3.5-1.el7.x86_64
[root@nginx02 softare]# rpm -ql keepalived
/etc/keepalived
/etc/keepalived/keepalived.conf
/etc/sysconfig/keepalived
/usr/bin/genhash
/usr/lib/systemd/system/keepalived.service
/usr/libexec/keepalived
/usr/sbin/keepalived
/usr/share/doc/keepalived-1.3.5
/usr/share/doc/keepalived-1.3.5/AUTHOR
/usr/share/doc/keepalived-1.3.5/CONTRIBUTORS
/usr/share/doc/keepalived-1.3.5/COPYING
/usr/share/doc/keepalived-1.3.5/ChangeLog
/usr/share/doc/keepalived-1.3.5/NOTE_vrrp_vmac.txt
/usr/share/doc/keepalived-1.3.5/README
/usr/share/doc/keepalived-1.3.5/TODO
/usr/share/doc/keepalived-1.3.5/keepalived.conf.SYNOPSIS
/usr/share/doc/keepalived-1.3.5/samples
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.HTTP_GET.port
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.IPv6
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.SMTP_CHECK
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.SSL_GET
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.fwmark
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.inhibit
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.misc_check
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.misc_check_arg
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.quorum
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.sample
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.status_code
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.track_interface
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.virtual_server_group
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.virtualhost
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.localcheck
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.lvs_syncd
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.routes
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.rules
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.scripts
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.static_ipaddress
/usr/share/doc/keepalived-1.3.5/samples/keepalived.conf.vrrp.sync
/usr/share/doc/keepalived-1.3.5/samples/sample.misccheck.smbcheck.sh
/usr/share/man/man1/genhash.1.gz
/usr/share/man/man5/keepalived.conf.5.gz
/usr/share/man/man8/keepalived.8.gz
/usr/share/snmp/mibs/KEEPALIVED-MIB.txt
/usr/share/snmp/mibs/VRRP-MIB.txt
/usr/share/snmp/mibs/VRRPv3-MIB.txt
[root@nginx02 softare]#
[root@nginx01 software]# cat /etc/keepalived/keepalived.conf ! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id LVS_DEVEL1
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 2
weight 20
fall 1
rise 10
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.189
}
track_script {
chk_nginx
}
}
[root@nginx01 software]#
[root@nginx01 software]# vi /etc/keepalived/check_nginx.sh
[root@nginx01 software]# chmod u+x /etc/keepalived/check_nginx.sh
[root@nginx01 software]# cat /etc/keepalived/check_nginx.sh
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then
/usr/local/nginx/sbin/nginx
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
pkill keep
fi
fi
[root@nginx01 software]#
[root@nginx01 ~]# systemctl start keepalived
[root@nginx01 ~]# systemctl enable keepalived
Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service.
[root@nginx01 ~]#
nginx01上的keepalived 配置完成
配置nginx02上的keepalived
[root@nginx02 softare]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id LVS_DEVEL2
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 2
weight 20
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.189
}
track_script {
chk_nginx
}
}
该脚本用户检测nginx进程是否存在，若不存在则重启，若重启失败则直接杀掉keepalived进程，触发切换。（若没有pkill命令请先安装）
[root@nginx02 softare]# vi "/etc/keepalived/check_nginx.sh"
[root@nginx02 softare]# cat "/etc/keepalived/check_nginx.sh"
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then
/usr/local/nginx/sbin/nginx
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
pkill keep
fi
fi
[root@nginx02 ~]# chmod u+x "/etc/keepalived/check_nginx.sh"
[root@nginx02 softare]#
[root@nginx02 ~]# systemctl start keepalived
[root@nginx02 ~]# systemctl enable keepalived
Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service.
Nginx02上的keepalived配置完成
Apache安装
在web01和web02上分别安装apache
[root@web01 software]# yum -y install httpd httpd-devel | tee -a yum_install_apache_20180417.log
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package httpd.x86_64 0:2.4.6-67.el7.centos.6 will be installed
--> Processing Dependency: httpd-tools = 2.4.6-67.el7.centos.6 for package: httpd-2.4.6-67.el7.centos.6.x86_64
--> Processing Dependency: /etc/mime.types for package: httpd-2.4.6-67.el7.centos.6.x86_64
--> Processing Dependency: libaprutil-1.so.0()(64bit) for package: httpd-2.4.6-67.el7.centos.6.x86_64
--> Processing Dependency: libapr-1.so.0()(64bit) for package: httpd-2.4.6-67.el7.centos.6.x86_64
---> Package httpd-devel.x86_64 0:2.4.6-67.el7.centos.6 will be installed
--> Processing Dependency: perl >= 5.004 for package: httpd-devel-2.4.6-67.el7.centos.6.x86_64
--> Processing Dependency: perl(strict) for package: httpd-devel-2.4.6-67.el7.centos.6.x86_64
--> Processing Dependency: apr-util-devel for package: httpd-devel-2.4.6-67.el7.centos.6.x86_64
--> Processing Dependency: apr-devel for package: httpd-devel-2.4.6-67.el7.centos.6.x86_64
--> Processing Dependency: /usr/bin/perl for package: httpd-devel-2.4.6-67.el7.centos.6.x86_64
--> Running transaction check
---> Package apr.x86_64 0:1.4.8-3.el7_4.1 will be installed
---> Package apr-devel.x86_64 0:1.4.8-3.el7_4.1 will be installed
---> Package apr-util.x86_64 0:1.5.2-6.el7 will be installed
---> Package apr-util-devel.x86_64 0:1.5.2-6.el7 will be installed
--> Processing Dependency: openldap-devel(x86-64) for package: apr-util-devel-1.5.2-6.el7.x86_64
--> Processing Dependency: libdb-devel(x86-64) for package: apr-util-devel-1.5.2-6.el7.x86_64
--> Processing Dependency: expat-devel(x86-64) for package: apr-util-devel-1.5.2-6.el7.x86_64
---> Package httpd-tools.x86_64 0:2.4.6-67.el7.centos.6 will be installed
---> Package mailcap.noarch 0:2.1.41-2.el7 will be installed
---> Package perl.x86_64 4:5.16.3-292.el7 will be installed
--> Processing Dependency: perl-libs = 4:5.16.3-292.el7 for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Socket) >= 1.3 for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Scalar::Util) >= 1.10 for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl-macros for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl-libs for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(threads::shared) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(threads) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(constant) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Time::Local) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Time::HiRes) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Storable) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Socket) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Scalar::Util) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Pod::Simple::XHTML) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Pod::Simple::Search) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Getopt::Long) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Filter::Util::Call) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(File::Temp) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(File::Spec::Unix) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(File::Spec::Functions) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(File::Spec) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(File::Path) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Exporter) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Cwd) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: perl(Carp) for package: 4:perl-5.16.3-292.el7.x86_64
--> Processing Dependency: libperl.so()(64bit) for package: 4:perl-5.16.3-292.el7.x86_64
--> Running transaction check
---> Package expat-devel.x86_64 0:2.1.0-10.el7_3 will be installed
--> Processing Dependency: expat = 2.1.0-10.el7_3 for package: expat-devel-2.1.0-10.el7_3.x86_64
---> Package libdb-devel.x86_64 0:5.3.21-21.el7_4 will be installed
--> Processing Dependency: libdb(x86-64) = 5.3.21-21.el7_4 for package: libdb-devel-5.3.21-21.el7_4.x86_64
---> Package openldap-devel.x86_64 0:2.4.44-5.el7 will be installed
--> Processing Dependency: openldap(x86-64) = 2.4.44-5.el7 for package: openldap-devel-2.4.44-5.el7.x86_64
--> Processing Dependency: cyrus-sasl-devel(x86-64) for package: openldap-devel-2.4.44-5.el7.x86_64
---> Package perl-Carp.noarch 0:1.26-244.el7 will be installed
---> Package perl-Exporter.noarch 0:5.68-3.el7 will be installed
---> Package perl-File-Path.noarch 0:2.09-2.el7 will be installed
---> Package perl-File-Temp.noarch 0:0.23.01-3.el7 will be installed
---> Package perl-Filter.x86_64 0:1.49-3.el7 will be installed
---> Package perl-Getopt-Long.noarch 0:2.40-2.el7 will be installed
--> Processing Dependency: perl(Pod::Usage) >= 1.14 for package: perl-Getopt-Long-2.40-2.el7.noarch
--> Processing Dependency: perl(Text::ParseWords) for package: perl-Getopt-Long-2.40-2.el7.noarch
---> Package perl-PathTools.x86_64 0:3.40-5.el7 will be installed
---> Package perl-Pod-Simple.noarch 1:3.28-4.el7 will be installed
--> Processing Dependency: perl(Pod::Escapes) >= 1.04 for package: 1:perl-Pod-Simple-3.28-4.el7.noarch
--> Processing Dependency: perl(Encode) for package: 1:perl-Pod-Simple-3.28-4.el7.noarch
---> Package perl-Scalar-List-Utils.x86_64 0:1.27-248.el7 will be installed
---> Package perl-Socket.x86_64 0:2.010-4.el7 will be installed
---> Package perl-Storable.x86_64 0:2.45-3.el7 will be installed
---> Package perl-Time-HiRes.x86_64 4:1.9725-3.el7 will be installed
---> Package perl-Time-Local.noarch 0:1.2300-2.el7 will be installed
---> Package perl-constant.noarch 0:1.27-2.el7 will be installed
---> Package perl-libs.x86_64 4:5.16.3-292.el7 will be installed
---> Package perl-macros.x86_64 4:5.16.3-292.el7 will be installed
---> Package perl-threads.x86_64 0:1.87-4.el7 will be installed
---> Package perl-threads-shared.x86_64 0:1.43-6.el7 will be installed
--> Running transaction check
---> Package cyrus-sasl-devel.x86_64 0:2.1.26-21.el7 will be installed
--> Processing Dependency: cyrus-sasl-lib(x86-64) = 2.1.26-21.el7 for package: cyrus-sasl-devel-2.1.26-21.el7.x86_64
--> Processing Dependency: cyrus-sasl(x86-64) = 2.1.26-21.el7 for package: cyrus-sasl-devel-2.1.26-21.el7.x86_64
---> Package expat.x86_64 0:2.1.0-8.el7 will be updated
---> Package expat.x86_64 0:2.1.0-10.el7_3 will be an update
---> Package libdb.x86_64 0:5.3.21-19.el7 will be updated
--> Processing Dependency: libdb(x86-64) = 5.3.21-19.el7 for package: libdb-utils-5.3.21-19.el7.x86_64
---> Package libdb.x86_64 0:5.3.21-21.el7_4 will be an update
---> Package openldap.x86_64 0:2.4.40-13.el7 will be updated
---> Package openldap.x86_64 0:2.4.44-5.el7 will be an update
---> Package perl-Encode.x86_64 0:2.51-7.el7 will be installed
---> Package perl-Pod-Escapes.noarch 1:1.04-292.el7 will be installed
---> Package perl-Pod-Usage.noarch 0:1.63-3.el7 will be installed
--> Processing Dependency: perl(Pod::Text) >= 3.15 for package: perl-Pod-Usage-1.63-3.el7.noarch
--> Processing Dependency: perl-Pod-Perldoc for package: perl-Pod-Usage-1.63-3.el7.noarch
---> Package perl-Text-ParseWords.noarch 0:3.29-4.el7 will be installed
--> Running transaction check
---> Package cyrus-sasl.x86_64 0:2.1.26-21.el7 will be installed
---> Package cyrus-sasl-lib.x86_64 0:2.1.26-20.el7_2 will be updated
---> Package cyrus-sasl-lib.x86_64 0:2.1.26-21.el7 will be an update
---> Package libdb-utils.x86_64 0:5.3.21-19.el7 will be updated
---> Package libdb-utils.x86_64 0:5.3.21-21.el7_4 will be an update
---> Package perl-Pod-Perldoc.noarch 0:3.20-4.el7 will be installed
--> Processing Dependency: perl(parent) for package: perl-Pod-Perldoc-3.20-4.el7.noarch
--> Processing Dependency: perl(HTTP::Tiny) for package: perl-Pod-Perldoc-3.20-4.el7.noarch
---> Package perl-podlators.noarch 0:2.5.1-3.el7 will be installed
--> Running transaction check
---> Package perl-HTTP-Tiny.noarch 0:0.033-3.el7 will be installed
---> Package perl-parent.noarch 1:0.225-244.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
httpd x86_64 2.4.6-67.el7.centos.6 updates 2.7 M
httpd-devel x86_64 2.4.6-67.el7.centos.6 updates 194 k
Installing for dependencies:
apr x86_64 1.4.8-3.el7_4.1 updates 103 k
apr-devel x86_64 1.4.8-3.el7_4.1 updates 188 k
apr-util x86_64 1.5.2-6.el7 base 92 k
apr-util-devel x86_64 1.5.2-6.el7 base 76 k
cyrus-sasl x86_64 2.1.26-21.el7 base 88 k
cyrus-sasl-devel x86_64 2.1.26-21.el7 base 310 k
expat-devel x86_64 2.1.0-10.el7_3 base 57 k
httpd-tools x86_64 2.4.6-67.el7.centos.6 updates 88 k
libdb-devel x86_64 5.3.21-21.el7_4 updates 38 k
mailcap noarch 2.1.41-2.el7 base 31 k
openldap-devel x86_64 2.4.44-5.el7 base 801 k
perl x86_64 4:5.16.3-292.el7 base 8.0 M
perl-Carp noarch 1.26-244.el7 base 19 k
perl-Encode x86_64 2.51-7.el7 base 1.5 M
perl-Exporter noarch 5.68-3.el7 base 28 k
perl-File-Path noarch 2.09-2.el7 base 26 k
perl-File-Temp noarch 0.23.01-3.el7 base 56 k
perl-Filter x86_64 1.49-3.el7 base 76 k
perl-Getopt-Long noarch 2.40-2.el7 base 56 k
perl-HTTP-Tiny noarch 0.033-3.el7 base 38 k
perl-PathTools x86_64 3.40-5.el7 base 82 k
perl-Pod-Escapes noarch 1:1.04-292.el7 base 51 k
perl-Pod-Perldoc noarch 3.20-4.el7 base 87 k
perl-Pod-Simple noarch 1:3.28-4.el7 base 216 k
perl-Pod-Usage noarch 1.63-3.el7 base 27 k
perl-Scalar-List-Utils x86_64 1.27-248.el7 base 36 k
perl-Socket x86_64 2.010-4.el7 base 49 k
perl-Storable x86_64 2.45-3.el7 base 77 k
perl-Text-ParseWords noarch 3.29-4.el7 base 14 k
perl-Time-HiRes x86_64 4:1.9725-3.el7 base 45 k
perl-Time-Local noarch 1.2300-2.el7 base 24 k
perl-constant noarch 1.27-2.el7 base 19 k
perl-libs x86_64 4:5.16.3-292.el7 base 688 k
perl-macros x86_64 4:5.16.3-292.el7 base 43 k
perl-parent noarch 1:0.225-244.el7 base 12 k
perl-podlators noarch 2.5.1-3.el7 base 112 k
perl-threads x86_64 1.87-4.el7 base 49 k
perl-threads-shared x86_64 1.43-6.el7 base 39 k
Updating for dependencies:
cyrus-sasl-lib x86_64 2.1.26-21.el7 base 155 k
expat x86_64 2.1.0-10.el7_3 base 81 k
libdb x86_64 5.3.21-21.el7_4 updates 719 k
libdb-utils x86_64 5.3.21-21.el7_4 updates 132 k
openldap x86_64 2.4.44-5.el7 base 354 k
Transaction Summary
================================================================================
Install 2 Packages (+38 Dependent packages)
Upgrade ( 5 Dependent packages)
Total download size: 17 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
--------------------------------------------------------------------------------
Total 667 kB/s | 17 MB 00:26
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Updating : libdb-5.3.21-21.el7_4.x86_64 1/50
Updating : expat-2.1.0-10.el7_3.x86_64 2/50
Installing : apr-1.4.8-3.el7_4.1.x86_64 3/50
Installing : apr-util-1.5.2-6.el7.x86_64 4/50
Updating : cyrus-sasl-lib-2.1.26-21.el7.x86_64 5/50
Updating : openldap-2.4.44-5.el7.x86_64 6/50
Installing : apr-devel-1.4.8-3.el7_4.1.x86_64 7/50
Installing : cyrus-sasl-2.1.26-21.el7.x86_64 8/50
Installing : cyrus-sasl-devel-2.1.26-21.el7.x86_64 9/50
Installing : openldap-devel-2.4.44-5.el7.x86_64 10/50
Installing : httpd-tools-2.4.6-67.el7.centos.6.x86_64 11/50
Installing : expat-devel-2.1.0-10.el7_3.x86_64 12/50
Installing : libdb-devel-5.3.21-21.el7_4.x86_64 13/50
Installing : apr-util-devel-1.5.2-6.el7.x86_64 14/50
Installing : 1:perl-parent-0.225-244.el7.noarch 15/50
Installing : perl-HTTP-Tiny-0.033-3.el7.noarch 16/50
Installing : perl-podlators-2.5.1-3.el7.noarch 17/50
Installing : perl-Pod-Perldoc-3.20-4.el7.noarch 18/50
Installing : 1:perl-Pod-Escapes-1.04-292.el7.noarch 19/50
Installing : perl-Text-ParseWords-3.29-4.el7.noarch 20/50
Installing : perl-Encode-2.51-7.el7.x86_64 21/50
Installing : perl-Pod-Usage-1.63-3.el7.noarch 22/50
Installing : 4:perl-macros-5.16.3-292.el7.x86_64 23/50
Installing : 4:perl-libs-5.16.3-292.el7.x86_64 24/50
Installing : perl-Storable-2.45-3.el7.x86_64 25/50
Installing : perl-Exporter-5.68-3.el7.noarch 26/50
Installing : perl-constant-1.27-2.el7.noarch 27/50
Installing : perl-Time-Local-1.2300-2.el7.noarch 28/50
Installing : perl-Socket-2.010-4.el7.x86_64 29/50
Installing : perl-Carp-1.26-244.el7.noarch 30/50
Installing : 4:perl-Time-HiRes-1.9725-3.el7.x86_64 31/50
Installing : perl-PathTools-3.40-5.el7.x86_64 32/50
Installing : perl-Scalar-List-Utils-1.27-248.el7.x86_64 33/50
Installing : perl-File-Temp-0.23.01-3.el7.noarch 34/50
Installing : perl-File-Path-2.09-2.el7.noarch 35/50
Installing : perl-threads-shared-1.43-6.el7.x86_64 36/50
Installing : perl-threads-1.87-4.el7.x86_64 37/50
Installing : perl-Filter-1.49-3.el7.x86_64 38/50
Installing : 1:perl-Pod-Simple-3.28-4.el7.noarch 39/50
Installing : perl-Getopt-Long-2.40-2.el7.noarch 40/50
Installing : 4:perl-5.16.3-292.el7.x86_64 41/50
Installing : mailcap-2.1.41-2.el7.noarch 42/50
Installing : httpd-2.4.6-67.el7.centos.6.x86_64 43/50
Installing : httpd-devel-2.4.6-67.el7.centos.6.x86_64 44/50
Updating : libdb-utils-5.3.21-21.el7_4.x86_64 45/50
Cleanup : libdb-utils-5.3.21-19.el7.x86_64 46/50
Cleanup : openldap-2.4.40-13.el7.x86_64 47/50
Cleanup : cyrus-sasl-lib-2.1.26-20.el7_2.x86_64 48/50
Cleanup : libdb-5.3.21-19.el7.x86_64 49/50
Cleanup : expat-2.1.0-8.el7.x86_64 50/50
Verifying : perl-HTTP-Tiny-0.033-3.el7.noarch 1/50
Verifying : mailcap-2.1.41-2.el7.noarch 2/50
Verifying : perl-threads-shared-1.43-6.el7.x86_64 3/50
Verifying : perl-Storable-2.45-3.el7.x86_64 4/50
Verifying : apr-1.4.8-3.el7_4.1.x86_64 5/50
Verifying : perl-Exporter-5.68-3.el7.noarch 6/50
Verifying : perl-constant-1.27-2.el7.noarch 7/50
Verifying : perl-PathTools-3.40-5.el7.x86_64 8/50
Verifying : 4:perl-macros-5.16.3-292.el7.x86_64 9/50
Verifying : perl-File-Temp-0.23.01-3.el7.noarch 10/50
Verifying : httpd-devel-2.4.6-67.el7.centos.6.x86_64 11/50
Verifying : expat-devel-2.1.0-10.el7_3.x86_64 12/50
Verifying : 1:perl-parent-0.225-244.el7.noarch 13/50
Verifying : 4:perl-5.16.3-292.el7.x86_64 14/50
Verifying : cyrus-sasl-lib-2.1.26-21.el7.x86_64 15/50
Verifying : httpd-tools-2.4.6-67.el7.centos.6.x86_64 16/50
Verifying : cyrus-sasl-devel-2.1.26-21.el7.x86_64 17/50
Verifying : 1:perl-Pod-Simple-3.28-4.el7.noarch 18/50
Verifying : perl-Time-Local-1.2300-2.el7.noarch 19/50
Verifying : 4:perl-libs-5.16.3-292.el7.x86_64 20/50
Verifying : perl-Pod-Perldoc-3.20-4.el7.noarch 21/50
Verifying : perl-Socket-2.010-4.el7.x86_64 22/50
Verifying : perl-Carp-1.26-244.el7.noarch 23/50
Verifying : perl-podlators-2.5.1-3.el7.noarch 24/50
Verifying : apr-util-1.5.2-6.el7.x86_64 25/50
Verifying : 4:perl-Time-HiRes-1.9725-3.el7.x86_64 26/50
Verifying : openldap-2.4.44-5.el7.x86_64 27/50
Verifying : perl-Scalar-List-Utils-1.27-248.el7.x86_64 28/50
Verifying : 1:perl-Pod-Escapes-1.04-292.el7.noarch 29/50
Verifying : libdb-5.3.21-21.el7_4.x86_64 30/50
Verifying : perl-Pod-Usage-1.63-3.el7.noarch 31/50
Verifying : libdb-devel-5.3.21-21.el7_4.x86_64 32/50
Verifying : perl-Encode-2.51-7.el7.x86_64 33/50
Verifying : libdb-utils-5.3.21-21.el7_4.x86_64 34/50
Verifying : perl-Getopt-Long-2.40-2.el7.noarch 35/50
Verifying : apr-devel-1.4.8-3.el7_4.1.x86_64 36/50
Verifying : perl-File-Path-2.09-2.el7.noarch 37/50
Verifying : apr-util-devel-1.5.2-6.el7.x86_64 38/50
Verifying : httpd-2.4.6-67.el7.centos.6.x86_64 39/50
Verifying : perl-threads-1.87-4.el7.x86_64 40/50
Verifying : expat-2.1.0-10.el7_3.x86_64 41/50
Verifying : perl-Filter-1.49-3.el7.x86_64 42/50
Verifying : perl-Text-ParseWords-3.29-4.el7.noarch 43/50
Verifying : openldap-devel-2.4.44-5.el7.x86_64 44/50
Verifying : cyrus-sasl-2.1.26-21.el7.x86_64 45/50
Verifying : cyrus-sasl-lib-2.1.26-20.el7_2.x86_64 46/50
Verifying : libdb-5.3.21-19.el7.x86_64 47/50
Verifying : expat-2.1.0-8.el7.x86_64 48/50
Verifying : libdb-utils-5.3.21-19.el7.x86_64 49/50
Verifying : openldap-2.4.40-13.el7.x86_64 50/50
Installed:
httpd.x86_64 0:2.4.6-67.el7.centos.6
httpd-devel.x86_64 0:2.4.6-67.el7.centos.6
Dependency Installed:
apr.x86_64 0:1.4.8-3.el7_4.1
apr-devel.x86_64 0:1.4.8-3.el7_4.1
apr-util.x86_64 0:1.5.2-6.el7
apr-util-devel.x86_64 0:1.5.2-6.el7
cyrus-sasl.x86_64 0:2.1.26-21.el7
cyrus-sasl-devel.x86_64 0:2.1.26-21.el7
expat-devel.x86_64 0:2.1.0-10.el7_3
httpd-tools.x86_64 0:2.4.6-67.el7.centos.6
libdb-devel.x86_64 0:5.3.21-21.el7_4
mailcap.noarch 0:2.1.41-2.el7
openldap-devel.x86_64 0:2.4.44-5.el7
perl.x86_64 4:5.16.3-292.el7
perl-Carp.noarch 0:1.26-244.el7
perl-Encode.x86_64 0:2.51-7.el7
perl-Exporter.noarch 0:5.68-3.el7
perl-File-Path.noarch 0:2.09-2.el7
perl-File-Temp.noarch 0:0.23.01-3.el7
perl-Filter.x86_64 0:1.49-3.el7
perl-Getopt-Long.noarch 0:2.40-2.el7
perl-HTTP-Tiny.noarch 0:0.033-3.el7
perl-PathTools.x86_64 0:3.40-5.el7
perl-Pod-Escapes.noarch 1:1.04-292.el7
perl-Pod-Perldoc.noarch 0:3.20-4.el7
perl-Pod-Simple.noarch 1:3.28-4.el7
perl-Pod-Usage.noarch 0:1.63-3.el7
perl-Scalar-List-Utils.x86_64 0:1.27-248.el7
perl-Socket.x86_64 0:2.010-4.el7
perl-Storable.x86_64 0:2.45-3.el7
perl-Text-ParseWords.noarch 0:3.29-4.el7
perl-Time-HiRes.x86_64 4:1.9725-3.el7
perl-Time-Local.noarch 0:1.2300-2.el7
perl-constant.noarch 0:1.27-2.el7
perl-libs.x86_64 4:5.16.3-292.el7
perl-macros.x86_64 4:5.16.3-292.el7
perl-parent.noarch 1:0.225-244.el7
perl-podlators.noarch 0:2.5.1-3.el7
perl-threads.x86_64 0:1.87-4.el7
perl-threads-shared.x86_64 0:1.43-6.el7
Dependency Updated:
cyrus-sasl-lib.x86_64 0:2.1.26-21.el7 expat.x86_64 0:2.1.0-10.el7_3
libdb.x86_64 0:5.3.21-21.el7_4 libdb-utils.x86_64 0:5.3.21-21.el7_4
openldap.x86_64 0:2.4.44-5.el7
Complete!
[root@web01 software]#
[root@web02 software]# yum -y install httpd httpd-devel | tee -a yum_install_apache_20180417.log
[root@web01 software]# systemctl start httpd
[root@web01 software]# systemctl enable httpd
Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.
[root@web01 software]# echo web01-192.168.2.187 > /var/www/html/index.html
[root@web01 software]#
[root@web02 software]# systemctl start httpd
[root@web02 software]# systemctl enable httpd
Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.
[root@web02 software]# echo web02-192.168.2.188 > /var/www/html/index.html
[root@web02 software]#
关闭所有服务器的防火墙和selinux
[root@nginx01 ~]# systemctl stop firewalld.service
[root@nginx01 ~]# systemctl disable firewalld.service
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.
[root@nginx01 ~]# firewall-cmd --state
not running
[root@nginx01 ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: enforcing
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 28
[root@nginx01 ~]# setenforce 0
[root@nginx01 ~]# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: permissive
Mode from config file: enforcing
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 28
[root@nginx01 ~]# vi /etc/selinux/config
[root@nginx01 ~]# grep -v '#' /etc/selinux/config
SELINUX=disabled
SELINUXTYPE=targeted
[root@nginx01 ~]#
重启所有服务
[root@nginx01 ~]# nginx -s reload
[root@nginx01 ~]# systemctl restart keepalived
[root@nginx02 ~]# nginx -s reload
[root@nginx02 ~]# systemctl restart keepalived
[root@nginx02 ~]#
[root@web01 software]# systemctl restart httpd
[root@web01 software]#
[root@web02 software]# systemctl restart httpd
[root@web02 software]#
高可用测试
[root@nginx01 ~]# ip ad
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:29:6f:aa:40 brd ff:ff:ff:ff:ff:ff
inet 192.168.2.185/24 brd 192.168.2.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.2.189/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::6ceb:c635:2a8e:56b1/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::acee:8487:9f9d:5909/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
inet6 fe80::1766:5ed5:664c:7324/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
[root@nginx01 ~]#
无法通过访问192.168.2.189
修改keepalived 配置
[root@nginx01 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id proxy1
#vrrp_skip_check_adv_addr
#vrrp_strict
#vrrp_garp_interval 0
#vrrp_gna_interval 0
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 2
weight 20
fall 1
rise 10
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.189
}
track_script {
chk_nginx
}
}
[root@nginx01 ~]#
[root@nginx02 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id proxy2
#vrrp_skip_check_adv_addr
#vrrp_strict
#vrrp_garp_interval 0
#vrrp_gna_interval 0
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 2
weight 20
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.189
}
track_script {
chk_nginx
}
}
[root@nginx02 ~]#
重启上面2个keepalived.
继续测试
1.先确保web01和web02可以直接访问
Web01：
Web02：
查看nginx01和nginx02 IP
[root@nginx01 ~]# ip ad | grep 192.168
inet 192.168.2.185/24 brd 192.168.2.255 scope global ens33
inet 192.168.2.189/32 scope global ens33
[root@nginx02 ~]# ip ad | grep 192.168
inet 192.168.2.186/24 brd 192.168.2.255 scope global ens33
[root@nginx02 ~]#
可见当前是nginx01提供keepalived 服务
访问vritual IP 192.168.2.189
可见keepalived 是基于nginx已IP轮询方式提供服务
停掉nginx01上的keepalived 相当于nginx01宕机
[root@nginx01 ~]# systemctl stop keepalived
[root@nginx01 ~]# ip ad | grep 192.168
inet 192.168.2.185/24 brd 192.168.2.255 scope global ens33
[root@nginx01 ~]#
[root@nginx02 ~]# ip ad | grep 192.168
inet 192.168.2.186/24 brd 192.168.2.255 scope global ens33
inet 192.168.2.189/32 scope global ens33
此时nginx02上的keepalived从backup提升为master
刷新访问virtual IP 192.168.2.189 ,keepalived 会以nginx 轮询方式接受访问web服务器。
测试通过。
双活架构模式:
配置 主机 ip 操作系统 软件 vip
nginx01 192.168.2.185 Centos7 nginx 端口82
keepalived 192.168.2.189
nginx02 192.168.2.186 Centos7 nginx 端口82
keepalived 192.168.2.190
web01 192.168.2.187 Centos7 apache 端口80 /
web02 192.168.2.188 Centos7 apache 端口80 /
Nginx01配置:
[root@nginx01 ~]# cp -p /etc/keepalived/keepalived.conf /etc/keepal ived/keepalived.conf.bk.20140418_master_backup_mode
[root@nginx01 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id proxy1
#vrrp_skip_check_adv_addr
#vrrp_strict
#vrrp_garp_interval 0
#vrrp_gna_interval 0
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 2
weight 20
fall 1
rise 10
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.189
}
track_script {
chk_nginx
}
}
vrrp_instance VI_2 {
state BACKUP
interface ens33
virtual_router_id 52
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.190
}
track_script {
chk_nginx
}
}
[root@nginx01 ~]# systemctl restart keepalived
[root@nginx01 ~]# ip a | grep 192.168
inet 192.168.2.185/24 brd 192.168.2.255 scope global ens33
inet 192.168.2.189/32 scope global ens33
Nginx02的配置
[root@nginx02 ~]# cp -p /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bk.20140418_master_backup_mode
[root@nginx02 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
#smtp_server 192.168.200.1
#smtp_connect_timeout 30
router_id proxy2
#vrrp_skip_check_adv_addr
#vrrp_strict
#vrrp_garp_interval 0
#vrrp_gna_interval 0
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_nginx.sh"
interval 2
weight 20
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.189
}
track_script {
chk_nginx
}
}
vrrp_instance VI_2 {
state MASTER
interface ens33
virtual_router_id 52
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.190
}
track_script {
chk_nginx
}
}
[root@nginx02 ~]# ip a | grep 192.168
inet 192.168.2.186/24 brd 192.168.2.255 scope global ens33
inet 192.168.2.190/32 scope global ens33
页面访问测试
VIP 1 192.168.2.189
可知其以轮询方式去访问
VIP192.168.2.190
高可用测试
Stop nginx上的 keepalived 模拟宕机
[root@nginx01 ~]# systemctl stop keepalived
[root@nginx01 ~]# ip a | grep 192.168
inet 192.168.2.185/24 brd 192.168.2.255 scope global ens33
[root@nginx01 ~]#
[root@nginx02 ~]# ip a | grep 192.168
inet 192.168.2.186/24 brd 192.168.2.255 scope global ens33
inet 192.168.2.190/32 scope global ens33
inet 192.168.2.189/32 scope global ens33
[root@nginx02 ~]#
页面访问:
VIP 1 192.168.2.189
VIP 1 192.168.2.190
发现vip1和vip2访问web服务正常
现vip1漂移至vip2，nginx02接管nginx01的vip1，此时nginx02单独对外提供服务。
总结：
1.主备模式对外只提供一个vip，访问便捷，但同时只有一台服务器对外提供服务； 2.双活模式对外提供两个vip，访问比较麻烦，但同时又两台服务器对外提供服务； 3.不管主备模式还是双活模式都能高可用运行。
