ajp协议: httpd 代理 tomcat集群

约定不等于承诺〃 2022-11-04 01:33 25阅读 0赞

### 文章目录 ###

*  1, ajp proxy
 *  2, mod\_jk: httpd 模块
 *   *  a, 下载mod\_jk源码包,编译httpd插件
     *  b, 配置mod\_jk

# 1, ajp proxy #

*  ajp代理使用场景：后台存在多个tomcat服务时（单个tomcat服务，使用代理性能低）  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70]

############ ajp: tcp协议代理: 4层 ############
    [root@c7-docker conf]# cat /opt/apache-tomcat-8.5.63/conf/server.xml
    
    <Connector port="8009" protocol="AJP/1.3"
           address="0.0.0.0"
           maxHttpHeaderSize="8192"
           enableLookups="false"
           connectionTimeout="20000"
           URIEncoding="utf-8"
           acceptCount="1000"
           redirectPort="8443"
           secretRequired=""
           secret=""/>
    
    [root@c7-docker conf]# cat /etc/httpd/conf.d/a.conf
    Listen 81
    <VirtualHost *:81>
      ServerAdmin webmaster@host.example.com
      #DocumentRoot "/www/81"
      ServerName host.example.com
      ErrorLog "logs/host.example.com-error_log"
      TransferLog "logs/host.example.com-access_log"
    
      ProxyVia On
      ProxyRequests Off
      ProxyPreserveHost On
      ProxyPass / ajp://127.0.0.1:8009/
      ProxyPassReverse / ajp://127.0.0.1:8009/
      Header set Access-Control-Allow-Origin *
    </VirtualHost>
    
    Listen 822
    <proxy balancer://ajp_tom_cluster>
      BalancerMember ajp://127.0.0.1:8009    loadfactor=10
      BalancerMember ajp://192.168.56.6:8009 loadfactor=10
    </proxy>
    <VirtualHost *:822>
      ProxyRequests Off
      ErrorLog "logs/822-error_log"
      CustomLog "logs/822-access_log" common
      ProxyPass / balancer://ajp_tom_cluster/
      ProxyPassReverse / balancer://ajp_tom_cluster/
      Header set Access-Control-Allow-Origin * 
    </VirtualHost>

# 2, mod\_jk: httpd 模块 #

## a, 下载mod\_jk源码包,编译httpd插件 ##

文档：  
[https://tomcat.apache.org/connectors-doc/][https_tomcat.apache.org_connectors-doc]

#解压后，进入native目录
    [root@c7-docker native]# yum install -y httpd-devel #获取apxs可执行文件
    [root@c7-docker native]# ./configure --with-apxs=/usr/bin/apxs 
    #./configure --with-apache=/home/apache24/httpd-2.4.12
    
    [root@c7-docker native]# ll /usr/lib64/httpd/modules/mod_jk.so
    -rwxr-xr-x 1 root root 1566328 Feb 26 15:39 /usr/lib64/httpd/modules/mod_jk.so
    
    [root@c7-docker native]# ls apache-2.0/
    bldjk54.qclsrc  config.m4  Makefile.apxs     Makefile.in  mod_jk.a  mod_jk.la  mod_jk.o
    bldjk.qclsrc    Makefile   Makefile.apxs.in  Makefile.vc  mod_jk.c  mod_jk.lo  mod_jk.so
    
    [root@c7-docker native]# head /etc/httpd/conf.modules.d/00-proxy.conf
    # This file configures all the proxy modules:
    LoadModule jk_module   modules/mod_jk.so
    
    [root@c7-docker native]# httpd -M |grep jk
     jk_module (shared)

## b, 配置mod\_jk ##

文档：  
[https://tomcat.apache.org/connectors-doc/common\_howto/quick.html][https_tomcat.apache.org_connectors-doc_common_howto_quick.html]  
[https://tomcat.apache.org/tomcat-4.0-doc/config/ajp.html][https_tomcat.apache.org_tomcat-4.0-doc_config_ajp.html]  
workers.properties 配置：[https://tomcat.apache.org/connectors-doc/reference/workers.html][https_tomcat.apache.org_connectors-doc_reference_workers.html]

[root@c7-docker conf]# cat /etc/httpd/conf.d/a.conf
    # Load mod_jk
    LoadModule jk_module   modules/mod_jk.so
    # Configure mod_jk
    JkShmFile     /var/log/httpd/mod_jk.shm
    JkWorkersFile /etc/httpd/conf/jk-workers.properties
    JkLogFile /var/log/httpd/mod_jk.log
    JkLogLevel info
    #
    Listen 82
    <VirtualHost *:82>
      DocumentRoot /www/82
      JkMount /* ajp13
      #JkMount /*.jsp ajp13
      #JkMount /servlet/* ajp13
      Header set Access-Control-Allow-Origin *
    </VirtualHost>
    
    
    [root@c7-docker conf]# cat /etc/httpd/conf/jk-workers.properties
    workers.tomcat_home=/opt/apache-tomcat-8.5.63
    workers.java_home=/usr/java/default
    ps=/
    worker.list=ajp12, ajp13
    # Definition for Ajp13 worker
    worker.ajp13.port=8009
    worker.ajp13.host=127.0.0.1
    worker.ajp13.type=ajp13
    # worker "ajp13" uses connections, which will stay no more than 10mn in the connection pool
    worker.ajp13.connection_pool_timeout=600
    # worker "ajp13" ask operating system to send KEEP-ALIVE signal on the connection
    worker.ajp13.socket_keepalive=1

*  mod\_jk 负载均衡：多个后台tomcat文档：  
    [https://tomcat.apache.org/connectors-doc/common\_howto/loadbalancers.html][https_tomcat.apache.org_connectors-doc_common_howto_loadbalancers.html]  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 1]  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 2]

######### lb 多个后台tomcat ##########
    [root@c7-docker conf]# cat /etc/httpd/conf.d/a.conf
    # Load mod_jk
    LoadModule jk_module   modules/mod_jk.so
    # Configure mod_jk
    JkShmFile     /var/log/httpd/mod_jk.shm
    JkWorkersFile /etc/httpd/conf/jk-workers.properties
    JkLogFile /var/log/httpd/mod_jk.log
    JkLogLevel info
    #
    Listen 82
    <VirtualHost *:82>
      DocumentRoot /www/82
      JkMount /* lbcluster
      JkMount /jkstatus  stat1
      #JkMount /*.jsp ajp13
      #JkMount /servlet/* ajp13
      Header set Access-Control-Allow-Origin *
    </VirtualHost>
    
    
    [root@c7-docker conf]# cat /etc/httpd/conf/jk-workers.properties
    workers.tomcat_home=/opt/apache-tomcat-8.5.63
    workers.java_home=/usr/java/default
    ps=/
    worker.list = lbcluster,stat1
    worker.basic.socket_keepalive=1
    worker.basic.connect_timeout=10000
    
    # Definition for Ajp13 worker
    worker.lbcluster.type = lb
    worker.lbcluster.sticky_session = 0
    worker.lbcluster.balance_workers = TomcatA, TomcatB
    #
    worker.stat1.type = status
    #
    worker.TomcatA.type = ajp13
    worker.TomcatA.host = 192.168.56.6
    worker.TomcatA.port = 8009
    worker.TomcatA.lbfactor = 1
    #
    worker.TomcatB.type = ajp13
    worker.TomcatB.host = 127.0.0.1
    worker.TomcatB.port = 8010
    worker.TomcatB.lbfactor = 1
    
    
    #tomcat server.xml 
    [root@c7-docker conf]# cat /opt/apache-tomcat-8.5.63/conf/server.xml：jvmRoute="TomcatB"
     <Connector port="8009" protocol="AJP/1.3"
           address="0.0.0.0"
           maxHttpHeaderSize="8192"
           enableLookups="false"
           connectionTimeout="20000"
           URIEncoding="utf-8"
           acceptCount="1000"
           redirectPort="8443"
           secretRequired=""
           secret=""/>
           
     
        <Engine name="Catalina" defaultHost="localhost" jvmRoute="TomcatB">	
    
    
    #查看mod_jk日志
    [root@c7-docker ROOT]# tailf /var/log/httpd/mod_jk.log
    [Wed Mar 03 14:16:10.045 2021] [19101:139632599426816] [info] ajp_connect_to_endpoint::jk_ajp_common.c (1064): (TomcatB) Failed opening socket to (192.168.56.117:8010) (errno=111)
    [Wed Mar 03 14:16:10.045 2021] [19101:139632599426816] [error] ajp_send_request::jk_ajp_common.c (1724): (TomcatB) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=111)
    [Wed Mar 03 14:16:10.045 2021] [19101:139632599426816] [info] ajp_service::jk_ajp_common.c (2774): (TomcatB) sending request to tomcat failed (recoverable), because of error during request sending (attempt=2)
    [Wed Mar 03 14:16:10.045 2021] [19101:139632599426816] [error] ajp_service::jk_ajp_common.c (2795): (TomcatB) connecting to tomcat failed (rc=-3, errors=1, client_errors=0).
    [Wed Mar 03 14:16:10.045 2021] [19101:139632599426816] [info] service::jk_lb_worker.c (1600): service failed, worker TomcatB is in error state
    [Wed Mar 03 14:16:10.045 2021] [19101:139632599426816] [info] service::jk_lb_worker.c (1652): Forcing recovery once for 2 workers
    [Wed Mar 03 14:23:14.893 2021] [27857:140686857304256] [info] init_jk::mod_jk.c (3591): mod_jk/1.2.48 initialized

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70]: /images/20221023/b8a0a790ca1b4b2ea7d5e199c61a533a.png
[https_tomcat.apache.org_connectors-doc]: https://tomcat.apache.org/connectors-doc/
[https_tomcat.apache.org_connectors-doc_common_howto_quick.html]: https://tomcat.apache.org/connectors-doc/common_howto/quick.html
[https_tomcat.apache.org_tomcat-4.0-doc_config_ajp.html]: https://tomcat.apache.org/tomcat-4.0-doc/config/ajp.html
[https_tomcat.apache.org_connectors-doc_reference_workers.html]: https://tomcat.apache.org/connectors-doc/reference/workers.html
[https_tomcat.apache.org_connectors-doc_common_howto_loadbalancers.html]: https://tomcat.apache.org/connectors-doc/common_howto/loadbalancers.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 1]: /images/20221023/29c6401af0744e00a01b28596772706b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70 2]: /images/20221023/7107d4cda0174d04beb477e7fdea3776.png