需求:此项目要求在两台机器中各安装两个tomcat服务做负载均衡
安装步骤:
1.把所需的包下载下来,我用的版本为 openssl-1.1.0f.tar.gz pcre-8.4.0.tar.bz2ngx_cache_purge-2.3.tar.gz nginx-1.12.1.tar.gz keepalived-1.2.20.tar.gz jdk-8u131-linux-x64.tar.gz apache-tomcat-7.0.79.tar.gz
2.NGINX的安装
检查安装nginx的依赖性,nginx的模块需要第三方的支持,检查是否安装下列库:zlib zlib-devel openssl openssl-devel pcre pcre-devel gcc (此行要安装的上面的包中不包括的用 yum installzlib* 安装,以此类推)
1)添加用户和组
groupadd www
useradd -g www www
2)将文件解压后安装
tar zxvf openssl-1.1.0f.tar.gz
cd openssl-1.1.0f
./config --prefix=/usr/local/openssl
make && make install
tar jxvf pcre-8.4.0.tar.bz2
cd pcre-8.4.0
./configure --prefix=/usr/local/pcre
make && make install
tar zxvf nginx-1.12.1.tar.gz
cd nginx-1.12.1
./configure --user=www --group=www --prefix=/usr/local/nginx --with-pcre=/opt/pcre-8.40 --with-http_ssl_module--with-http_sub_module --with-http_stub_status_module--add-module=/opt/ngx_cache_purge-2.3 --with-openssl=/opt/openssl-1.1.0f (注:此行中/opt/ 路径是我的源码解压的地方)
make && make install
报错:1).若是报openssl错误。就是要把源路径给带上--with-openssl=/opt/openssl-1.*.*
2).若是这个错:make -f objs/Makefile
make[1]: Entering directory `/opt/nginx-1.12.1'
cd /usr/local/pcre \
&& if [ -f Makefile ]; then make distclean; fi \
&& CC="cc" CFLAGS="-O2 -fomit-frame-pointer -pipe " \
./configure --disable-shared
/bin/sh: line 2: ./configure: 没有那个文件或目录
make[1]: *** [/usr/local/pcre/Makefile] 错误 127
make[1]: Leaving directory `/opt/nginx-1.12.1'
make: *** [build] 错误 2
解决方法:发现--with-pcre=DIR是设置pcre的源码目录(就是解压后的目录),而不是pcre的安装目录
重新修改Nginx编译参数
3).报错: make make[1]: *** [objs/src/core/nginx.o]
后来确认是 nginx 与pcre不兼容导致
nginx-1.12.1与 pcre2-10.21不兼容。后来更换为pcre-8.40便可)
4) 安装完成。修改配置
vim /usr/local/nginx/conf/nginx.conf
user www www;
#user nobody;
worker_processes 4;
error_log /usr/local/nginx/logs/nginx_error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
pid /usr/local/nginx/logs/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;
events {
use epoll;
worker_connections 65535;
}
http {
include mime.types;
default_type application/octet-stream;
charset utf-8;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 300m;
#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;
tcp_nodelay on;
sendfile on;
tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
client_body_buffer_size 512k;
proxy_connect_timeout 1;
proxy_read_timeout 1;
proxy_send_timeout 1;
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/x-JavaScript text/css application/xml;
gzip_vary on;
(注:若缓存要开启) #proxy_temp_path /home/usr/local/www/proxy_temp_dir;
(注:若缓存要开启) #proxy_cache_path /home/usr/local/www/proxy_cache_dir levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;
upstream backend_server {
server 127.0.0.1:8080 weight=1 max_fails=2 fail_timeout=30s;
server 127.0.0.1:9090 weight=1 max_fails=2 fail_timeout=30s;
#ip_hash;
}
server {
listen 80;
server_name localhost;
index index.html index.htm;
root /usr/local/www/web/ROOT;
#charset koi8-r;
#access_log /usr/local/nginx/logs/host.access.log;
location / {
proxy_next_upstream http_502 http_504 error timeout invalid_header;
(注:若缓存要开启)####### proxy_cache cache_one;
proxy_cache_valid 200 304 12h;
proxy_cache_key $host$uri$is_args$args;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://backend_server;
expires 1d;
}
location ~ .*\.(php|jsp|cgi)?$
{
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://backend_server;
}
}
}
5.配置完成。
6. 创建缓存文件夹
mkdir /usr/local/www/proxy_temp_dir
mkdir /usr/local/www/proxy_cache_dir
启动NGINX
/usr/local/nginx/sbin/nginx
关闭NGINX
/usr/local/nginx/sbin/nginx -s stop
重启NGINX
/usr/local/nginx/sbin/nginx -s reload
7.安装jdk (网上查询)
配置环境变量:vim /etc/profile
export JAVA_HOME="/usr/local/jdk1.8.0" (注:根据自己安装的路径来)
export CLASS_PATH="$JAVA_HOME/lib:$JAVA_HOME/jre/lib"
export PATH=".:$PATH:$JAVA_HOME/bin "
source /etc/profile
8.安装tomcat
tar zxvf apache-tomcat-7.0.79.tar.gz
mkdir /usr/loca/tomcat1
cp -r apache_tomcat-7.0.79/* /usr/local/tomcat1
cp -r apache_tomcat-7.0.79/* /usr/local/tomcat2 (因为要安装两个服务)
修改TOMCAT配置文件/usr/local/tomcat2/conf/server.xml
点击(此处)折叠或打开
- 将以下内容
- <Server port="8005" shutdown="SHUTDOWN">...
- <Connector port="8080" protocol="HTTP/1.1" ...
- <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
点击(此处)折叠或打开
- 修改为
- <Server port="9005" shutdown="SHUTDOWN">...
- <Connector port="9090" protocol="HTTP/1.1" ...
- <Connector port="9009" protocol="AJP/1.3" redirectPort="8443" />
(注:在shutdown.sh 也要加入下面的行)
1)修改tomcat配置启动文件/usr/local/tomcat1/bin/startup.sh
在第二行加入: export CATALINA_HOME=/usr/local/tomcat1
2)修改TOMCAT配置启动文件/usr/local/tomcat2/bin/startup.sh
在 第二行加入: export CATALINA_HOME=/usr/local/tomcat2
9.tomcat安装完成
10.安装keepalived
tar zxvf keepalived-1.2.20.tar.gz
cd keepalived-1.2.6
./configure --prefix=/usr/local/keepalived
make
make install
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived
chmod +x /etc/init.d/keepalived
修改/etc/init.d/keepalived
寻找大约15行左右的 . /etc/sysconfig/keepalived, 修改为:
. /usr/local/keepalived/etc/sysconfig/keepalived, 即指向正确的文件位置
同时在上述行下添加以下内容(将keepavlied主程序所在路径导入到环境变量PATH中):
export PATH="$PATH:/usr/local/keepalived/sbin"
修改/usr/local/keepalived/etc/sysconfig/keepalived文件,设置正确的服务启动参数
KEEPALIVED_OPTIONS="-D -f /usr/local/keepalived/etc/keepalived/keepalived.conf"
4. 经过以上修改,keepalived基本安装即可完成,启动测试之:
service keepalived restart
5. 切勿忘记将此服务设置为开机启动
chkconfig keepalived on
启动提示“Starting keepalived: keepalived: error while loading sharedlibraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory”
用find / -name libssl.so.1.0.0
系统显示路径在/usr/local/lib64下面
用命令 ldconfig /usr/local/lib64
此时重启启动成功。
(备注:可以用“ldd 可执行程序名” ldd /usr/local/keepalived/sbin/keepalived 会显示动态链接库)
虚拟IP在两机器中添加:(与tomcat服务器在同一网段)
Ifconfig查看网卡名然后操作
Ifconfig eth0:0 192.168.2.33 netmask 255.255.255.0
配置主从模式:
节点A的关键配置:
节点A上的配置文件/usr/local/keepalived/etc/keepalived/keepalived.conf
global_defs {
notification_email {
root@localhost
}
notification_email_from root@local host
smtp_server localhost
smtp_connect_timeout 30
router_id NodeA
}
vrrp_instance VI_1 {
state MASTER #指定A节点为主节点 备用节点上设置为BACKUP即可
interface eth0 #绑定虚拟IP的网络接口
virtual_router_id 51 #VRRP组名,两个节点的设置必须一样,以指明各个节点属于同一VRRP组
priority 100 #主节点的优先级(1-254之间),备用节点必须比主节点优先级低
advert_int 1 #组播信息发送间隔,两个节点设置必须一样
authentication { #设置验证信息,两个节点必须一致
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { #指定虚拟IP, 两个节点设置必须一样
192.168.200.16/24
}
}
默认的配置文件中,竟然没有子网掩码,从而导致使用了默认子网掩码255.255.255.255,如果导致无法从其它机器访问虚拟IP(keepalived虚拟IP无法ping通)。
按同样的方法配置节点B并修改配置文件,可将A节点的配置文件复制到B节点,并修改以下几项:
router_id NodeB
state BACKUP
priority 99
其它项不必修改。
加入系统服务随机启动:chkconfig keepalived on
11.所有服务安装完成。可在网上查询把各服务器加入系统服务,随机启动。
为了,在网页中有所区分。把显示的页面改为以下配置:
增加一个Test.war 文件 放入到 /usr/share/tomcat/webapps目录下。
index.jsp文件如下
index.jsp文件如下vim /path/tomcat/webapps/index.jsp
TomcatA