Tomcat 热部署

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Tomcat的后台管理功能

Tomcat有个后台管理功能，可以实现工程热部署


配置 Tomcat 后台授权用户
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[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# vim tomcat-8081/conf/tomcat-users.xml
...
...
<!--
  <role rolename="tomcat"/>
  <role rolename="role1"/>
  <user username="tomcat" password="<must-be-changed>" roles="tomcat"/>
  <user username="both" password="<must-be-changed>" roles="tomcat,role1"/>
  <user username="role1" password="<must-be-changed>" roles="role1"/>
-->
  <role rolename="manager-gui"/>
  <role rolename="manager-script"/>
  <user username="root" password="root" roles="manager-gui,manager-script"/>

</tomcat-users>

刷新manager.html页面，还是403，后面重新启动tomcat,403,这就奇怪了…

还是403

后面查看相关tomcat官网，还需要此manager.xml文件，赋予远程管理的权限
Each deployed webapp has a context.xml file that lives in $CATALINA_BASE/conf/[enginename]/[hostname] (conf/Catalina/localhost by default) and has the same name as the webapp (manager.xml in this case). If no file is present, default values are used.
So, you need to create a file conf/Catalina/localhost/manager.xml and specify the rule you want to allow remote access.

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[root@iZuf6iq8e7ya9v3ix71k0pZ localhost]# pwd
/usr/local/tomcat/tomcat-8081/conf/Catalina/localhost
[root@iZuf6iq8e7ya9v3ix71k0pZ localhost]# vim manager.xml
...
<Context privileged="true" antiResourceLocking="false"
​         docBase="${catalina.home}/webapps/manager">
​    <Valve className="org.apache.catalina.valves.RemoteAddrValve" allow="^.*$" />
</Context>

重新启动 tomcat，刷新manger.html

发布服务到服务器端

配置二级域名解析

服务的分布结构

8083 manager.smniuhe.com rudy-manager-web(表现层)
8084 smniuhe.com:8084 rudy-manager(服务层)
8085 smniuhe.com:8085 rudy-content(服务层)

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# 查看服务器内存占用情况
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# free -m
​              total        used        free      shared  buff/cache   available
Mem:           3790        1707         793           0        1289        1831
Swap:             0           0           0
# 释放网页缓存，目录项和索引
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# sync
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# echo 3 > /proc/sys/vm/drop_caches
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# free -m
​              total        used        free      shared  buff/cache   available
Mem:           3790        1706        1994           0          89        1914
Swap:             0           0           0


[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# ll
总用量 9480
-rw-r--r-- 1 root root 9536557 1月  30 23:28 apache-tomcat-8.5.27.tar.gz
-rw-r----- 1 root root  156775 3月  26 11:36 dubbo-governance.log
drwxr-xr-x 9 root root    4096 3月  26 11:36 tomcat-8081
drwxr-xr-x 9 root root    4096 3月  20 13:38 tomcat-8083
# cp热部署配置
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# cp tomcat-8081/conf/Catalina/localhost/manager.xml tomcat-8083/conf/Catalina/localhost/
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# vim tomcat-8083/conf/tomcat-users.xml
...
...
  <role rolename="manager-gui"/>
  <role rolename="manager-script"/>
  <user username="root" password="root" roles="manager-gui,manager-script"/>
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# cp -rf tomcat-8083 tomcat-8084
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# cp -rf tomcat-8083 tomcat-8085
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# vim tomcat-8084/conf/server.xml
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# vim tomcat-8085/conf/server.xml
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# vim start-345.sh
...
/usr/local/tomcat/tomcat-8083/bin/startup.sh
/usr/local/tomcat/tomcat-8084/bin/startup.sh
/usr/local/tomcat/tomcat-8085/bin/startup.sh
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# chmod +x start-345.sh
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# vim stop-345.sh
...
/usr/local/tomcat/tomcat-8083/bin/shutdown.sh
/usr/local/tomcat/tomcat-8084/bin/shutdown.sh
/usr/local/tomcat/tomcat-8085/bin/shutdown.sh
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# chmod +x stop-345.sh
[root@iZuf6iq8e7ya9v3ix71k0pZ tomcat]# ./start-345.sh

# 配置maven插件
<build>
​        <plugins>
​            <plugin>
​                <groupId>org.apache.tomcat.maven</groupId>
​                <artifactId>tomcat7-maven-plugin</artifactId>
​                <configuration>
​                    <path>/</path>
​                    <port>8080</port>
​                    <url>http://smniuhe.com:8084/manager/text</url>
​                    <username>root</username>
​                    <password>root</password>
​                </configuration>
​            </plugin>
​        </plugins>
​    </build>

# create maven-redeployConfiguraion：
clean tomcat7:redeploy -DskipTests

热部署图