文章目錄
a, 使用單個nginx反向代理兩個tomcat
| 主機 | ip | 端口說明 |
|---|---|---|
| 主機1 | 192.168.56.66 | 8080: tomcat8, 80:nginx反向代理 |
| 主機2 | 192.168.56.77 | 8080: tomcat8 |
a.1，配置單個nginx反向代理
[root@c6 haproxy]# cat /etc/nginx/conf.d/proxy.conf
upstream tomcats {
#ip_hash;
server 192.168.56.66:8080;
server 192.168.56.77:8080;
}
server {
listen 80;
server_name c6;
location / {
proxy_pass http://tomcats;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header REMOTE-HOST $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
a.2，測試單個nginx反向代理
[root@c7 ~]# cat /opt/tomcat8/webapps/ROOT/a.jsp
<body>
<h1>c7</h1>
<%
System.out.println(session.getCreationTime());
out.println("<br> SESSION ID:" + session.getId() + "<br>");
out.println("Session created time is :" + session.getCreationTime()
+ "<br>");
%>
</body>
b, 使用keepalived維護虛擬ip: 在主備節點漂移
b1, 兩個節點配置keepalived
[root@c6 haproxy]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
[email protected]
}
notification_email_from [email protected]
smtp_server localhost
smtp_connect_timeout 30
router_id LVS_DEVEL_c6 ##主備不同
vrrp_macst_group4 224.0.67.67
}
##測試keepalive的backup狀態： 存在這個文件則權重減30,角色變爲backup
#vrrp_script chk_keep {
# script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
# interval 1
# weight -30
#}
vrrp_instance VI_1 {
state MASTER ##主備不同
interface eth1
virtual_router_id 51
priority 100 ##主備不同
advert_int 1
authentication {
auth_type PASS
auth_pass testkeepalive
}
virtual_ipaddress {
192.168.56.230 ##浮動ip
}
# #調用keepalived狀態測試腳本
# track_script {
# chk_keep
# }
# #發送通知: master狀態時,backup狀態時..
# notify_master "/etc/keepalived/notify.sh master"
# notify_backup "/etc/keepalived/notify.sh backup"
# notify_fault "/etc/keepalived/notify.sh fault"
}
##############################################
[root@c7 haproxy]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
[email protected]
}
notification_email_from [email protected]
smtp_server localhost
smtp_connect_timeout 30
router_id LVS_DEVEL_c7 ##diff
}
##keepalived state change test script
#vrrp_script chk_keep {
# script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
# interval 1
# weight -30
#}
vrrp_instance VI_1 {
state BACKUP ##diff
interface eth1
virtual_router_id 51
priority 80 ##diff
advert_int 1
authentication {
auth_type PASS
auth_pass testkeepalive
}
virtual_ipaddress {
192.168.56.230 ##float ip
}
# #invoke script
# track_script {
# chk_keep
# }
# #notify state change
# notify_master "/etc/keepalived/notify.sh master"
# notify_backup "/etc/keepalived/notify.sh backup"
# notify_fault "/etc/keepalived/notify.sh fault"
}
b2, keepalived的notify狀態通知腳本
每個keepalived主機都配置相同腳本: 當keepalived是master狀態時，啓動haproxy; 否則就停止haproxy
具體<linux如何發送126郵件>配置見https://blog.csdn.net/eyeofeagle/article/details/104295051#c_action_39
[root@c7 vagrant]# cat /etc/keepalived/notify.sh
#!/bin/bash
#keepalived-master-->啓動haproxy
#keepalived-backup-->停止haproxy
role=$1
send_mail(){
subject="keepalived master changes"
context="$(date +'%F %T'): $(hostname) changes to $role "
echo $context |mailx -s $subject [email protected] root@localhost
}
ctl_haproxy(){
case $role in
master)
service haproxy start;;
backup|faul)
service haproxy stop;;
esac
}
send_mail
ctl_haproxy
b3, 測試keepalived
[root@c6 conf.d]# service keepalived start
Starting keepalived: [ OK ]
[root@c6 conf.d]# ip a |grep 230
inet 192.168.56.230/32 scope global eth1
[root@c7 conf.d]# systemctl start keepalived
[root@c7 conf.d]# ip a |grep 230
##ip轉移
[root@c6 conf.d]# service keepalived stop
Stopping keepalived: [ OK ]
[root@c6 conf.d]# ip a |grep 230
[root@c6 conf.d]#
[root@c7 conf.d]# ip a |grep 230
inet 192.168.56.230/32 scope global eth1
c, 使用兩個nginx反向代理兩個tomcat
兩臺主機nginx配置一樣，如上面配置
d, 使用兩個haproxy反向代理兩個tomcat
| 主機 | ip | 端口說明 |
|---|---|---|
| 主機1 | 192.168.56.66 | 8080: tomcat8, 80:happroxy |
| 主機2 | 192.168.56.77 | 8080: tomcat8, 80:happroxy |
a.1， 配置haproxy反向代理
[root@c6 haproxy]#
....
frontend main *:80
#acl url_static path_beg -i /static /images /javascript /stylesheets
#acl url_static path_end -i .jpg .gif .png .css .js
#use_backend static if url_static
default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend static
balance roundrobin
server static1 192.168.56.66:8080 check
server static2 192.168.56.77:8080 check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
balance roundrobin
server app1 192.168.56.66:8080 check
server app2 192.168.56.77:8080 check
##############################################
[root@c7 haproxy]#
......
frontend main *:80
#acl url_static path_beg -i /static /images /javascript /stylesheets
#acl url_static path_end -i .jpg .gif .png .css .js
#use_backend static if url_static
default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend static
balance roundrobin
server static1 192.168.56.66:8080 check
server static2 192.168.56.77:8080 check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
balance roundrobin
server app1 192.168.56.66:8080 check
server app2 192.168.56.77:8080 check
a.2， 測試haproxy反向代理
