preface
On the first day of summer internship in sophomore year, I got familiar with the company environment, framework, installation and configuration of various software and received the following learning tasks: I installed and configured Niginx and Tomcat and built an efficient load balancing service cluster of Nginx+ Tomcat. I was totally overwhelmed when I received the task (I used to use Tomcat as a Web container at most). Then I finished the construction in one morning + noon by searching various baidu and blogs. I learned a lot of new knowledge and harvested a lot on my first day as a water dispenser manager.
The body of the
This paper describes how to build an efficient load balancing service cluster on Ali cloud server from scratch.
The system configuration
System image: CentOS7.3
CPU: mononuclear
Memory: 2 gb
System disk: 40GB
CentOs JDK installation
Since Tomcat is written in Java, the first step is to install and configure the JDK
(You can ignore this step if you have completed it)
First check whether the current system has its own JDK
rpm -qa |grep java
rpm -qa |grep jdk
rpm -qa |grep gcj
Copy the codeIf not, install the JDK
Yum install Java - 1.8.0 comes with - its * - yCopy the code
java -version
Copy the codeVerify that the JDK is successfully installed. If the following information is displayed, the JDK is successfully installed
vim /etc/profile
Copy the codeAdd the following to the bottom of /etc/profile:
#set java environment
export JAVA_HOME=/usr/lib/jvm/java
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/jre/lib/rt.jar
export PATH=$PATH:$JAVA_HOME/bin
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./etc/profile
Copy the codeValidate the configuration file Verify that environment variables are configured successfully
echo $JAVA_HOME
echo $CLASSPATH
echo $PATH
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Installing and configuring Tomcat
From tomcat’s official website to download the tar tomca8 package url: tomcat.apache.org/download-80…
Wegt http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.42/bin/apache-tomcat-8.5.42.tar.gzCopy the codeMy path is /usr/local/tomcat
Decompress the apache-tomcat-8.5.42.tar.gz file
The tar xf apache tomcat - 8.5.42. Tar. GzCopy the code
cdApache-tomcat-8.5.42 ln -sv apache-tomcat-8.5.31 tomcatCopy the code
Configure environment variables: Add a tomcat.sh file to the /etc/profile.d file
vim /etc/profile.d/tomcat.sh
Copy the codeAdd:
CATALINA_BASE=/usr/local/tomcat/apache-tomcat-8.5.42 // This address is the tomcat installation PATH=$CATALINA_BASE/bin:$PATH
export PATH CATALINA_BASE
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source /etc/profile.d/tomcat.sh
Copy the codeCheck whether the configuration is successful:
catalina.sh version
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http://localhost:8080/
Nginx installation
1. Add the yum source
rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
Copy the code2. Install Nginx
yum install -y nginx
Copy the codeNginx. service systemctl enable nginx.service 4. Go to http://localhost/
Set up a Tomcat load balancing cluster
A single Tomcat supports a maximum of about 500 online visits, to notify support for more visits a Tomcat cannot do. Nginx reverse proxy multiple Tomcat to achieve high performance load balancing tomcat cluster install two Tomcat columns by copying:
cp -r tomcat-service-1 tomcat-service-2
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vim conf/server.xml
Copy the codeMake the port number in the two Tomcat different. Modify the <! Server><! Connector><! Connctor> Connctor> Connctor> Connctor> Connctor> Connctor> Connctor> Connctor> Connctor
<Server port="8005" shutdown="SHUTDOWN">
<Connector port="8080" protocol="HTTP / 1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="8009" protocol="AJP / 1.3" redirectPort="8443" />
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To facilitate which Tomcat is serving, create a test folder and a JSP file in the webApp of the two Tomcat file directories.
<%@ page language="java" %>
<%@ page import="java.util.*" %>
<html>
<head>
<title>test</title>
</head>
<body>
<%
out.println("Hello World!"); // Embed Java language %> </body> </ HTML >Copy the codeThe effect picture in the measurement container:
Then modify the configuration file in Nginx
vim /etc/nginx/conf.d/default.conf
Copy the codeAdd at the beginning
# Cluster of servers
upstream netitcast.com { Server cluster nameServer 127.0.0.1:8080 weight = 1;The larger the weight, the greater the probability of allocation.Server 127.0.0.1:8090 weight = 2; }Copy the code
Afterword.
As a rookie of the Nuggets, all his original blogs are on CSDN. This is the first one when HE came to the Nuggets. Later, he will transfer the articles on CSDN and continue to write about the technical problems during the internship this summer.