Nginx reverse proxy under CentOS 6.5 system to achieve Tomcat load balancing
1. View the kernel and system parameters and version of the current system.
[root@node1 ~]# uname -a
Linux node1 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
[root@node1 ~]# cat /etc/issue
CentOS release 6.5 (Final)
Kernel \r on an \m
2.安装nginx。
1）安装gcc编译器及相关工具和依赖库。
[root@node1 ~]# yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers pcre
2) Compile and install the pcre library.
PCRE (Perl Compatible Regular Expressions) is a Perl library that includes Perl Compatible Regular Expressions. The role of Pcre is mainly to enable nginx to support the HTTP rewrite module.
Create a directory that specifies where to put the tarball.
[root@node1 ~]# mkdir -p /linuxidc/tools
[root@node1 ~]# cd /linuxidc/tools/
[root@node1 tools]# tar -zxf pcre-8.33.tar.gz
[root@node1 pcre- 8.33]# ./configure
[root@node1 pcre-8.33]# make && make install
[root@node1 nginx-1.5.8]# ./configure --with-http_stub_status_module --with-http_ssl_module --prefix=/data/ nginx
[root@node1 nginx-1.5.8]# make && make install
Note: The installation is successful and nginx is started, you may encounter the following error,
[root@node1 nginx-1.5.8]# /data/nginx/sbin/nginx -t
/data/nginx/sbin/nginx: error while loading shared libraries : libpcre.so.1: cannot open shared object file: No such file or directory
Solution:
[root@node1 ~]# cd /lib64/
[root@node1 lib64]# ln -s libpcre.so.0.0.1 libpcre.so.1
3）此事再启动nginx，查看下进程和端口。
[root@node1 lib64]# /data/nginx/sbin/nginx -t
nginx: the configuration file /data/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /data/nginx/conf/nginx.conf test is successful
[root@node1 lib64]# /data/nginx/sbin/nginx
[root@node1 lib64]# ps -ef | grep nginx
root 8991 1 0 16:43 ? 00:00:00 nginx: master process /data/nginx/sbin/nginx
nobody 8992 8991 0 16:43 ? 00:00:00 nginx: worker process
root 8994 1907 0 16:44 pts/1 00:00:00 grep nginx
[root@node1 lib64]# netstat -anpt | grep nginx
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 8991/nginx
3. Configure nginx web reverse proxy to achieve two tomcat load balancing: The
nginx configuration file is as follows:
[root@node1 ~]# cat /data/nginx/conf/nginx.conf
user root;
worker_processes 1;
#error_log logs/error .log info;
pid /data/nginx/logs/nginx.pid;
worker_rlimit_nofile 65535;
events {
use epoll;
worker_connections 65535;
multi_accept on;
}
http {
include mime.types;
default_type application/octet-stream;
charset utf-8;
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 60;
server_tokens off;
limit_rate_after 3m;
limit_rate 512k;
tcp_nodelay on;
client_header_buffer_size 256k;
large_client_header_buffers 4 256k;
# Define nginx proxy module
proxy_http_version 1.1;
proxy_connect_timeout 60;
proxy_read_timeout 60;
proxy_send_timeout 60;
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
proxy_headers_hash_max_size 51200;
proxy_headers_hash_bucket_size 6400;
# Define Gzip compression module
gzip on;
gzip_vary on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
# Define realserver pool
upstream linuxidc.com {
ip_hash;
server 192.168.1.15:8080 max_fails=0 weight=5;
server 192.168.1.19:8080 max_fails=0 weight=5;
}
server {
listen 80;
server_name linuxidc.net www.linuxidc.net;
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://linuxidc.com;
expires 1d;
access_log logs/host.access.log main;
}
# Define 404 502 503 504 error page
error_page 404 /404.html;
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
Load balancing between Apache and multiple Tomcat clusters under Linuxhttp ://www.linuxidc.com/Linux/2012-01/51731.htm
Nginx Tomcat Cluster Load Balancing Solution Noteshttp ://www.linuxidc.com/Linux/2013-07/86827.htm
Example detailed Tomcat component installation + Nginx reverse proxy Tomcat + Apache uses mod_jk and mod_proxy reverse proxy and load balancinghttp ://www.linuxidc.com/Linux/2013-06/85290.htm
Using Rsyslog+LogAnalyzer+MySQL to Deploy Log Server under CentOS 6.5http: //www.linuxidc.com/Linux/2014-06/103836.htm
Apache+Tomcat environment setup (JK deployment process) http://www.linuxidc.com/Linux/2012-11/74474.htm