Shulou(Shulou.com)06/01 Report--

This article will explain in detail how to achieve keeplied + nginx + tomcat high-availability deployment, the content of the article is of high quality, so the editor will share it with you for reference. I hope you will have some understanding of the relevant knowledge after reading this article.

Tomcat deployment

This experiment is to deploy tomcat middleware on two virtual machines, each virtual machine deploys three services, using three ports 7001, 7002 and 7003 respectively to deploy the program.

Tomcat virtual machine address:

192.168.56.57

192.168.56.58

Tomcat7001 configuration:

Go to the tomcat configuration file and modify the port parameters

Change the business port to port 7001 for external browser access

Change the port closed by the program to port 8006, which is used internally.

Several other services change the tomcat port accordingly.

Nginx configuration

This reverse proxy uses soft load nginx as proxy, and two virtual machines are used to switch between master and slave to ensure the normal use of business.

The addresses of the two Nginx servers are:

192.168.56.55

192.168.56.56

Nginx configuration:

This time nginx is installed in the / usr/local/nginx directory

Nginx profile changes:

[root@edsir1p8 conf] # cat nginx.conf

Worker_processes 4

Error_log logs/error.log

Pid logs/nginx.pid

Events {

Use epoll

Worker_connections 65000

}

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"'

Log_format json'{"@ timestamp": "$time_iso8601",'

'"@ version": "1",'

'"client": "$remote_addr",'

'"url": "$uri",'

'"status": "$status",'

'"domian": "$host",'

'"host": "$server_addr",'

'"size": "$body_bytes_sent",'

'"responsetime": "$request_time",'

'"referer": "$http_referer",'

'"ua": "$http_user_agent"'

'}'

Sendfile on

Include weixin.vhost.conf

}

[root@edsir1p8 conf] # cat weixin.vhost.conf

Upstream weixin {

# ip_hash

Server 192.168.56.57:7001 weight=1

Server 192.168.56.57:7002 weight=1

Server 192.168.56.57:7003 weight=1

Server 192.168.56.58:7001 weight=1

Server 192.168.56.58:7002 weight=1

Server 192.168.56.58:7003 weight=1

}

Server {

Listen 80

Server_name localhost

Location / {

# include proxy_common.conf

Proxy_pass http://weixin;

}

Access_log logs/weixin_access.log

}

Verified by browser

So far, the reverse proxy has been configured successfully.

Keepalived configuration

Install Keepalive

In this lab, keepalived and nginx are installed on a server.

192.168.56.55

192.168.56.56

After completing the above steps, keepalived can realize the transfer of virtual IP, but what we need in practical application is to transfer the virtual IP automatically, so we also need to configure the script of keepalived so that it can automatically transfer the virtual IP to the standby server when a certain nginx cannot provide services. The following script comes from the link provided above, which is based on accessing a link through curl. If you lower the priority of the server if you don't respond for three seconds two times in a row, we create a file called check_status.sh in the / etc/keepalived directory and type the following

#! / bin/bash

Count=0

For ((kumb0; k)

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