Nginx+Tomcat multi-instance and load balancing configuration
The reverse proxy load balancing function of NGINx is used to realize the Load balancing of Tomcat WEB service with tomcat multi-instance at the back end
01
Install the nginx service
Install the required PCRE libraries
The tar ZXF pcre – 8.38. Tar. Gz
CD pcre – 8.38
./configure
make && make install
cd .. /
Compile and install the Nginx service
The tar ZXF nginx – 1.11.3. Tar. Gz
CD nginx – 1.11.3
useradd nginx -s /sbin/nologin -M
yum install openssl openssl-devel -y
/configure –user=nginx –group=nginx –prefix=/application/nginx-1.11.3 –with-http_ssl_module –with-http_stub_status_module
make && make install
Nginx service for the relevant introduction and compilation parameters can refer to the public number in front of the article, the detailed configuration of the service are involved
02
Installing the JDK Environment
Tomcat requires the JDK environment. Therefore, install the JDK environment before installing Tomcat. Download the CORRESPONDING JDK software package first
tar xf jdk-8u60-linux-x64.tar.gz -C /application/
Unzip to the specified directory without compiling
Ln -s/application/jdk1.8.0 _60 / application/JDK
## Create soft links
sed -i.ori ‘$a export JAVA_HOME=/application/jdk\nexport PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH\nexport CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar’ /etc/profile
Configure environment variables
source /etc/profile
## Environment variables that take effect
java -version
Check whether the JDK environment is installed successfully
03
Install and configure Tomcat multiple instances
Tomcat multi-instance configuration is also quite simple, download the corresponding version of the software, decompress to use
Tar xf apache-tomcat-8.0.27.tar.gz -c /application/
Ln -s/application/apache tomcat – 8.0.27 / application/tomcat
echo ‘export TOMCAT_HOME=/application/tomcat’>>/etc/profile
The multi-instance installation configuration is as follows
Cp – a apache tomcat – 8.0.27 / application/tomcat8_1
Cp – a apache tomcat – 8.0.27 / application/tomcat8_2
Switch to the related directory and modify the corresponding configuration file
(The configuration files of both instances are changed in the same way, only the port and the site directory need to be changed)
cd /application/tomcat8_2/conf/
diff /application/tomcat/conf/server.xml ./server.xml
22c22
< <Server port=”8005″ shutdown=”SHUTDOWN”>
—
> <Server port=”8012″ shutdown=”SHUTDOWN”>
69c69
< < the Connector port = “8080” protocol = “HTTP / 1.1”
—
> < Connector port = “8082” protocol = “HTTP / 1.1”
123c123
< <Host name=”localhost” appBase=”webapps”
—
> <Host name=”localhost” appBase=”/web/www/bbs”
Creating a site Directory
mkdir /web/www/{www,bbs}/ROOT -p
echo “hello”>/web/www/www/ROOT/index.jsp
echo “world”>/web/www/bbs/ROOT/index.html
Start multi-instance
/application/tomcat8_1/bin/startup.sh
/application/tomcat8_2/bin/startup.sh
04
Configure nginx
vim /application/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 web_pools {
Server 127.0.0.1:8081;
Server 127.0.0.1:8082;
}
server {
listen 80;
server_name localhost;
location / {
root html;
index index.jsp index.html index.htm;
proxy_pass http://web_pools;
}
}
}
Check syntax and start nginx service
/application/nginx/sbin/nginx -t
/application/nginx/sbin/nginx
05
Test the load balancing effect
for i in `echo {1.. 6} `; Do the curl 192.168.1.129; done
hello
world
hello
world
hello
world
It indicates that load balancing has been configured
