A total of two servers on a single server how to achieve high availability two tomcat

## nginx configuration file

1. vim editor directly open nginx.conf
2. Modify nginx.conf
   increase
   upstream haha {
   Server 192.168.254.181:8080;
   Server 192.168.254.182:8080;
   }

location /项目名 {
root html;
index index.html index.htm;
proxy_pass http://haha/;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 200M;
client_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}

Modify nginx.conf
increase
upstream Hehe {
Server 192.168.254.181:8081;
Server 192.168.254.182:8081;
}

location / project name {
root HTML;
index index.html index.htm;
proxy_pass HTTP: // hehe /;
proxy_redirect OFF;
proxy_set_header $ Host Host;
proxy_set_header the X-Real-IP-$ REMOTE_ADDR;
proxy_set_header the X-Forwarded-the For-$ proxy_add_x_forwarded_for;
200M client_max_body_size;
client_body_buffer_size 128K;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4K;
proxy_buffers. 4 32K;
proxy_busy_buffers_size 64K;
proxy_temp_file_write_size 64K;
}
3. directly coupled with the two lines in the configuration file, the name of the specific project name as well as the actual schedule to;
4. port number of the port number is changed by pressing tomcat corresponding to the item which can not be wrong;
5.tomcat modify the port number shown below;
6. The
7. The editor Vim directly open the server.xml;
8. The
9. The
10. The
10. The three port numbers easily changed, there is no specific firewall see the port is not open then open Ports ;
11. firewall settings
12. start: systemctl start firewalld
Close: systemctl stop firewalld
Check status: System CTL firewalld status
power disabled: systemctl disable firewalld
power enable: enable firewalld systemctl
13. See all open ports: firewall-cmd - ZON E = the ports public --list-
update firewall rules: firewall-cmd --reload
add
firewall-cmd --zone = public --add- port = 80 / tcp --permanent (- permanent permanent, this parameter is not after the restart failure)
reload
firewall-cmd --reload
view
firewall-cmd --zone = public --query- port = 80 / tcp
Delete
Firewall---zone cmd = = public --remove-Port 80 / tcp --permanent
14. The completion of these services start chanting;
nginx start the service
cd / usr / local / nginx / sbin / execution
./nginx
Viewpoint whether there is an error error Follow the prompts to modify
tomcat start the service
cd / usr / local / tomat / bin execute
./startup.sh
are successful then the work on it;
want to help