ALB to map multiple context path on one common port (tomcat)












1














Currently, we have tomcat based deployments and one Apache server to manage multiple context path on the same port (v-host configuration)



For example,



ProxyPassMatch /test(.) http://127.0.0.1:7077/test$1*



ProxyPassMatch /test2(.) http://127.0.0.1:7077/test2$1*



and so on



Now we are shifting towards ALB of AWS and we want to map all those context paths in ALB as present in Apache configuration file.



We created ALB --> Listener on 80 Port --> Target created with a Necessary Instance with port 7077 --> health check is passed



Listener rule is,



Context path /test --> Forward to Target Group of 7077 port



Context path /test2 --> Forward to Target Group of 7077 port



But while testing it is showing 502 Bad Gateway when we shut down Apache and to test ALB



Any Solutions?










share|improve this question



























    1














    Currently, we have tomcat based deployments and one Apache server to manage multiple context path on the same port (v-host configuration)



    For example,



    ProxyPassMatch /test(.) http://127.0.0.1:7077/test$1*



    ProxyPassMatch /test2(.) http://127.0.0.1:7077/test2$1*



    and so on



    Now we are shifting towards ALB of AWS and we want to map all those context paths in ALB as present in Apache configuration file.



    We created ALB --> Listener on 80 Port --> Target created with a Necessary Instance with port 7077 --> health check is passed



    Listener rule is,



    Context path /test --> Forward to Target Group of 7077 port



    Context path /test2 --> Forward to Target Group of 7077 port



    But while testing it is showing 502 Bad Gateway when we shut down Apache and to test ALB



    Any Solutions?










    share|improve this question

























      1












      1








      1







      Currently, we have tomcat based deployments and one Apache server to manage multiple context path on the same port (v-host configuration)



      For example,



      ProxyPassMatch /test(.) http://127.0.0.1:7077/test$1*



      ProxyPassMatch /test2(.) http://127.0.0.1:7077/test2$1*



      and so on



      Now we are shifting towards ALB of AWS and we want to map all those context paths in ALB as present in Apache configuration file.



      We created ALB --> Listener on 80 Port --> Target created with a Necessary Instance with port 7077 --> health check is passed



      Listener rule is,



      Context path /test --> Forward to Target Group of 7077 port



      Context path /test2 --> Forward to Target Group of 7077 port



      But while testing it is showing 502 Bad Gateway when we shut down Apache and to test ALB



      Any Solutions?










      share|improve this question













      Currently, we have tomcat based deployments and one Apache server to manage multiple context path on the same port (v-host configuration)



      For example,



      ProxyPassMatch /test(.) http://127.0.0.1:7077/test$1*



      ProxyPassMatch /test2(.) http://127.0.0.1:7077/test2$1*



      and so on



      Now we are shifting towards ALB of AWS and we want to map all those context paths in ALB as present in Apache configuration file.



      We created ALB --> Listener on 80 Port --> Target created with a Necessary Instance with port 7077 --> health check is passed



      Listener rule is,



      Context path /test --> Forward to Target Group of 7077 port



      Context path /test2 --> Forward to Target Group of 7077 port



      But while testing it is showing 502 Bad Gateway when we shut down Apache and to test ALB



      Any Solutions?







      amazon-web-services amazon-elb






      share|improve this question













      share|improve this question











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      asked Nov 12 '18 at 14:11









      Devendra

      176




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          The Application Load Balancer cannot rewrite the path going to the target like you can with a typical reverse proxy.



          https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html#path-conditions says:




          The path pattern is used to route requests but does not alter them. For example, if a rule has a path pattern of /img/*, the rule would forward a request for /img/picture.jpg to the specified target group as a request for /img/picture.jpg.




          Tomcat specific:



          Perhaps you can have the tomcat app listen on multiple paths with configuration in context.xml or server.xml. This question has some suggestions, but it seems if you have multiple contexts, the app will run twice and take twice the memory.






          share|improve this answer





















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            The Application Load Balancer cannot rewrite the path going to the target like you can with a typical reverse proxy.



            https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html#path-conditions says:




            The path pattern is used to route requests but does not alter them. For example, if a rule has a path pattern of /img/*, the rule would forward a request for /img/picture.jpg to the specified target group as a request for /img/picture.jpg.




            Tomcat specific:



            Perhaps you can have the tomcat app listen on multiple paths with configuration in context.xml or server.xml. This question has some suggestions, but it seems if you have multiple contexts, the app will run twice and take twice the memory.






            share|improve this answer


























              0














              The Application Load Balancer cannot rewrite the path going to the target like you can with a typical reverse proxy.



              https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html#path-conditions says:




              The path pattern is used to route requests but does not alter them. For example, if a rule has a path pattern of /img/*, the rule would forward a request for /img/picture.jpg to the specified target group as a request for /img/picture.jpg.




              Tomcat specific:



              Perhaps you can have the tomcat app listen on multiple paths with configuration in context.xml or server.xml. This question has some suggestions, but it seems if you have multiple contexts, the app will run twice and take twice the memory.






              share|improve this answer
























                0












                0








                0






                The Application Load Balancer cannot rewrite the path going to the target like you can with a typical reverse proxy.



                https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html#path-conditions says:




                The path pattern is used to route requests but does not alter them. For example, if a rule has a path pattern of /img/*, the rule would forward a request for /img/picture.jpg to the specified target group as a request for /img/picture.jpg.




                Tomcat specific:



                Perhaps you can have the tomcat app listen on multiple paths with configuration in context.xml or server.xml. This question has some suggestions, but it seems if you have multiple contexts, the app will run twice and take twice the memory.






                share|improve this answer












                The Application Load Balancer cannot rewrite the path going to the target like you can with a typical reverse proxy.



                https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html#path-conditions says:




                The path pattern is used to route requests but does not alter them. For example, if a rule has a path pattern of /img/*, the rule would forward a request for /img/picture.jpg to the specified target group as a request for /img/picture.jpg.




                Tomcat specific:



                Perhaps you can have the tomcat app listen on multiple paths with configuration in context.xml or server.xml. This question has some suggestions, but it seems if you have multiple contexts, the app will run twice and take twice the memory.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Dec 14 '18 at 18:45









                Victor Roetman

                1,2261129




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