Get HAProxy server name on response











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I'm trying to get the HAProxy backend name for every response. For this I have a lua action like the following one:



core.register_action("hook", { "http-res" }, function(txn)

  txn:Info()

end)


and this config in the haproxy:



...

backend backend-puppetserver

  balance roundrobin

  http-response lua.hook

  server server_1 192.168.1.3

...


My problem is that no matter what I try to print that info (txn.sf, headers, etc.) I'm totally unable to find the server name (server_1) or it's ip. Where is that data stored? I can't find anything in the documentation. The most I get is the id by using txn.sf:srv_id()



Just to add that yeah, the action is working and it's printing information. This is just a matter of find the right call to fetch the server name.






lua haproxy







share|improve this question
























  • backend name refers to backend-puppetserver or backend server name whichi defined in server?
    – nuster cache server
    Nov 9 at 13:50










  • @nustercacheserver Sorry, what I'm trying to get in the actual server, not the backend name. Fixing the question.
    – David Moreno García
    Nov 9 at 15:09












  • you can just use http-response set-header BackendServer %s
    – nuster cache server
    Nov 9 at 15:16















up vote
0
down vote

favorite












I'm trying to get the HAProxy backend name for every response. For this I have a lua action like the following one:



core.register_action("hook", { "http-res" }, function(txn)

  txn:Info()

end)


and this config in the haproxy:



...

backend backend-puppetserver

  balance roundrobin

  http-response lua.hook

  server server_1 192.168.1.3

...


My problem is that no matter what I try to print that info (txn.sf, headers, etc.) I'm totally unable to find the server name (server_1) or it's ip. Where is that data stored? I can't find anything in the documentation. The most I get is the id by using txn.sf:srv_id()



Just to add that yeah, the action is working and it's printing information. This is just a matter of find the right call to fetch the server name.






lua haproxy







share|improve this question
























  • backend name refers to backend-puppetserver or backend server name whichi defined in server?
    – nuster cache server
    Nov 9 at 13:50










  • @nustercacheserver Sorry, what I'm trying to get in the actual server, not the backend name. Fixing the question.
    – David Moreno García
    Nov 9 at 15:09












  • you can just use http-response set-header BackendServer %s
    – nuster cache server
    Nov 9 at 15:16













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I'm trying to get the HAProxy backend name for every response. For this I have a lua action like the following one:



core.register_action("hook", { "http-res" }, function(txn)

  txn:Info()

end)


and this config in the haproxy:



...

backend backend-puppetserver

  balance roundrobin

  http-response lua.hook

  server server_1 192.168.1.3

...


My problem is that no matter what I try to print that info (txn.sf, headers, etc.) I'm totally unable to find the server name (server_1) or it's ip. Where is that data stored? I can't find anything in the documentation. The most I get is the id by using txn.sf:srv_id()



Just to add that yeah, the action is working and it's printing information. This is just a matter of find the right call to fetch the server name.






lua haproxy







share|improve this question















I'm trying to get the HAProxy backend name for every response. For this I have a lua action like the following one:



core.register_action("hook", { "http-res" }, function(txn)

  txn:Info()

end)


and this config in the haproxy:



...

backend backend-puppetserver

  balance roundrobin

  http-response lua.hook

  server server_1 192.168.1.3

...


My problem is that no matter what I try to print that info (txn.sf, headers, etc.) I'm totally unable to find the server name (server_1) or it's ip. Where is that data stored? I can't find anything in the documentation. The most I get is the id by using txn.sf:srv_id()



Just to add that yeah, the action is working and it's printing information. This is just a matter of find the right call to fetch the server name.






lua haproxy




lua haproxy






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 9 at 15:10

























asked Nov 7 at 11:17









David Moreno García

2,21543266




2,21543266












  • backend name refers to backend-puppetserver or backend server name whichi defined in server?
    – nuster cache server
    Nov 9 at 13:50










  • @nustercacheserver Sorry, what I'm trying to get in the actual server, not the backend name. Fixing the question.
    – David Moreno García
    Nov 9 at 15:09












  • you can just use http-response set-header BackendServer %s
    – nuster cache server
    Nov 9 at 15:16


















  • backend name refers to backend-puppetserver or backend server name whichi defined in server?
    – nuster cache server
    Nov 9 at 13:50










  • @nustercacheserver Sorry, what I'm trying to get in the actual server, not the backend name. Fixing the question.
    – David Moreno García
    Nov 9 at 15:09












  • you can just use http-response set-header BackendServer %s
    – nuster cache server
    Nov 9 at 15:16
















backend name refers to backend-puppetserver or backend server name whichi defined in server?
– nuster cache server
Nov 9 at 13:50




backend name refers to backend-puppetserver or backend server name whichi defined in server?
– nuster cache server
Nov 9 at 13:50












@nustercacheserver Sorry, what I'm trying to get in the actual server, not the backend name. Fixing the question.
– David Moreno García
Nov 9 at 15:09






@nustercacheserver Sorry, what I'm trying to get in the actual server, not the backend name. Fixing the question.
– David Moreno García
Nov 9 at 15:09














you can just use http-response set-header BackendServer %s
– nuster cache server
Nov 9 at 15:16




you can just use http-response set-header BackendServer %s
– nuster cache server
Nov 9 at 15:16












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http-response set-header BackendServer %s





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    You can use



    http-response set-header BackendServer %s





    share|improve this answer

























      up vote
      1
      down vote



      accepted










      You can use



      http-response set-header BackendServer %s





      share|improve this answer























        up vote
        1
        down vote



        accepted







        up vote
        1
        down vote



        accepted






        You can use



        http-response set-header BackendServer %s





        share|improve this answer












        You can use



        http-response set-header BackendServer %s






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 9 at 15:22









        nuster cache server

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