基本结构
首先要明白两个基本知识点：
- 平时我们在地址栏里面输入http://www.domain.com 访问的是80端口，相当于http://www.domain.com:80
- 而 https://www.domain.com 使用的是443端口
那么问题就来了，如果多个系统都要单独使用一个二级域名的话，直接修改tomcat的配置会导致端口冲突。
下面我的解决办法是在Internet和tomcat之间加一个nginx反向代理。
基本结构
https请求发送到nginx，nginx将请求代理到tomcat
nginx解决了单ip多域名的问题，多站点就需要tomcat来解决了
网上找到的最好的解决方案是多实例tomcat配置实现单机多站点
什么意思呢？
就是把tomcat拷贝多份，然后修改各个tomcat的server.xml中的shutdown，http以及AJP1.3的端口，然后将tomcat实例启动即可。
如果你们公司好比较重视技术基础设施最好是不要在一台server上部署太多的应用，这个方案对内存要求比较高，因为每个tomcat跑起来之后可能会占200M左右内存，这还是对并发量比较小的，如果实例数一多起来，内存会吃不消。
实操步骤
首先默认你有两个以上指向你的服务器的域名，顶级域名或二级域名都可以。
默认你的服务器上已经安装好了jdk环境。后文中使用的tomcat是8.5版本的。
有两个站点：a.domain.com 和 b.domain.com ,a.domain.com使用https访问，b.domain.com使用http访问
1.安装nginx
yum install nginx
2.下载tomcat，解压到你需要的路径下
假定tomcat解压在/home/admin/app/tomcat 下
3.配置各独立站点
- 为A、B站点各新建一个目录，分别为是/home/admin/app/a.domain.com 和 /home/admin/app/b.domain.com
- 将/home/admin/app/tomcat下的 conf、logs、temp、webapps、work分别拷贝一份到/home/admin/app/a.domain.com 和 /home/admin/app/b.domain.com下
- 建一个目录/home/admin/app/a.domain.com/https_certificate 存放ssl证书
- 分别修改两个站点目录下的conf/server.xml文件，修改原则就是：凡是涉及到端口的地方全都修改成唯一的
/home/admin/app/a.domain.com/conf/server.xml
...
...
/home/admin/app/b.domain.com/conf/server.xml
...
...
- 为各独立站点配置独立的启动脚本,实际上就是把tomcat原来的startup.sh做了一点修改
/home/admin/app/a.domain.com/startup.sh
export CATALINA_BASE=/home/admin/app/a.domain.com
export CATALINA_HOME=/home/admin/app/tomcat
#!/bin/sh
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -----------------------------------------------------------------------------
# Start Script for the CATALINA Server
# -----------------------------------------------------------------------------
# Better OS/400 detection: see Bugzilla 31132
os400=false
case "`uname`" in
OS400*) os400=true;;
esac
# resolve links - $0 may be a softlink
PRG="$0"
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`/"$link"
fi
done
PRGDIR=`dirname "$PRG"`
EXECUTABLE=/home/admin/app/tomcat/bin/catalina.sh
# Check that target executable exists
if $os400; then
# -x will Only work on the os400 if the files are:
# 1. owned by the user
# 2. owned by the PRIMARY group of the user
# this will not work if the user belongs in secondary groups
eval
else
if [ ! -x "$EXECUTABLE" ]; then
echo "Cannot find $PRGDIR/$EXECUTABLE"
echo "The file is absent or does not have execute permission"
echo "This file is needed to run this program"
exit 1
fi
fi
exec "$EXECUTABLE" start "$@"
/home/admin/app/b.domain.com/startup.sh
export CATALINA_BASE=/home/admin/app/b.domain.com
export CATALINA_HOME=/home/admin/app/tomcat
#!/bin/sh
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -----------------------------------------------------------------------------
# Start Script for the CATALINA Server
# -----------------------------------------------------------------------------
# Better OS/400 detection: see Bugzilla 31132
os400=false
case "`uname`" in
OS400*) os400=true;;
esac
# resolve links - $0 may be a softlink
PRG="$0"
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`/"$link"
fi
done
PRGDIR=`dirname "$PRG"`
EXECUTABLE=/home/admin/app/tomcat/bin/catalina.sh
# Check that target executable exists
if $os400; then
# -x will Only work on the os400 if the files are:
# 1. owned by the user
# 2. owned by the PRIMARY group of the user
# this will not work if the user belongs in secondary groups
eval
else
if [ ! -x "$EXECUTABLE" ]; then
echo "Cannot find $PRGDIR/$EXECUTABLE"
echo "The file is absent or does not have execute permission"
echo "This file is needed to run this program"
exit 1
fi
fi
exec "$EXECUTABLE" start "$@"
4. 修改nginx配置
- 为两个站点分别准备一份nginx配置文件
su - root
cd /etc/nginx/conf.d
cp default.conf a.domain.com.conf
cp default.conf b.domain.com.conf
- 修改配置文件
a.domain.com.conf
server {
listen 443;
server_name a.domain.com;
ssl on;
ssl_certificate /home/admin/app/a.domain.com/https_certificate/Nginx/1_a.domain.com_bundle.crt;
ssl_certificate_key /home/admin/app/a.domain.com/https_certificate/Nginx/2_a.domain.com.key;
ssl_session_timeout 5m;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; #按照这个协议配置
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE;#按照这个套件配置
ssl_prefer_server_ciphers on;
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_set_header X-Forwarded-Proto $scheme;
# note, there is not SSL here! plain HTTP is used
proxy_pass http://127.0.0.1:8180;
}
}
b.domain.com.conf
server {
client_max_body_size 2000M; ##上传文件时body的最大值(如：2G 、200K)
listen 80;
server_name b.domain.com;
location / {
proxy_pass http://127.0.0.1:8280;
}
}
- 测试配置文件测正确性
nginx -t -c b.domain.com.conf
nginx -t -c a.domain.com.conf
- 重启nginx
service nginx restart
这篇教程是根据昨天的配置写的，我的机器是在阿里云上买的centos6.5版本，如果各位同学按照这个配置不能成功可以留言提问